From 2fc935fafd43ba588eb6ade0d35721be90d306fc Mon Sep 17 00:00:00 2001
From: Sebastian <sebastian@sgundersen.com>
Date: Mon, 25 Mar 2024 04:15:58 +0100
Subject: [PATCH] Code cleanup and fixing CI errors

---
 .gitattributes                                |   3 +-
 ajax.php                                      | 253 ++++++++---------
 amd/build.sh                                  |  11 -
 amd/build/core.min.js                         |   4 +-
 amd/build/core.min.js.map                     |   2 +-
 amd/build/instructor.min.js                   |   4 +-
 amd/build/instructor.min.js.map               |   2 +-
 amd/build/student.min.js                      |   4 +-
 amd/build/student.min.js.map                  |   2 +-
 amd/src/core.js                               |  11 +-
 amd/src/edit.js                               |   1 -
 amd/src/instructor.js                         | 148 +++++-----
 amd/src/student.js                            |  12 -
 .../backup_jazzquiz_activity_task.class.php   |   4 +
 backup/moodle2/backup_jazzquiz_stepslib.php   |  31 +-
 .../restore_jazzquiz_activity_task.class.php  |  29 +-
 backup/moodle2/restore_jazzquiz_stepslib.php  |  99 +++++--
 classes/bank/add_questions_bank_view.php      |  56 ++++
 classes/bank/jazzquiz_question_bank_view.php  | 213 --------------
 ...ion_bank_add_to_jazzquiz_action_column.php |  68 -----
 classes/exporter.php                          |  33 ++-
 classes/forms/edit/add_question_form.php      |  20 +-
 classes/forms/view/start_session.php          |  23 +-
 classes/forms/view/student_start_form.php     |  18 +-
 classes/improviser.php                        | 147 +++++-----
 classes/jazzquiz.php                          | 199 +++++++------
 classes/jazzquiz_attempt.php                  | 267 +++++++++++++-----
 classes/jazzquiz_question.php                 |  29 +-
 classes/jazzquiz_session.php                  | 262 +++++++++--------
 classes/jazzquiz_vote.php                     |  30 +-
 classes/local/page_requirements_diff.php      |  80 ++++++
 classes/output/renderer.php                   | 225 ++++++---------
 classes/privacy/provider.php                  |  62 ++--
 db/access.php                                 |  84 ++----
 db/upgrade.php                                |  16 +-
 edit.php                                      |  92 +++---
 index.php                                     |  12 +-
 lang/en/jazzquiz.php                          |   3 +-
 lib.php                                       | 118 ++++----
 locallib.php                                  |  15 +-
 mod_form.php                                  |  12 +-
 reports.php                                   |  40 +--
 styles.css                                    |  49 +---
 templates/continue_session.mustache           |  29 +-
 templates/edit_question_list.mustache         | 126 ++++++---
 templates/guests_not_allowed.mustache         |  30 +-
 templates/join_session.mustache               |  44 ++-
 templates/no_session.mustache                 |  31 +-
 templates/question.mustache                   |  43 ++-
 templates/quiz.mustache                       |  58 +++-
 templates/report.mustache                     | 147 +++++++---
 templates/start_session.mustache              |  31 +-
 version.php                                   |   2 +
 view.php                                      |  75 ++---
 54 files changed, 1806 insertions(+), 1603 deletions(-)
 delete mode 100755 amd/build.sh
 create mode 100644 classes/bank/add_questions_bank_view.php
 delete mode 100755 classes/bank/jazzquiz_question_bank_view.php
 delete mode 100755 classes/bank/question_bank_add_to_jazzquiz_action_column.php
 create mode 100644 classes/local/page_requirements_diff.php

diff --git a/.gitattributes b/.gitattributes
index 4cab1f4..1552618 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,2 +1 @@
-# Set the default behavior, in case people don't have core.autocrlf set.
-* text=auto
+amd/build/** -diff
diff --git a/ajax.php b/ajax.php
index 416a4c5..a66a04f 100755
--- a/ajax.php
+++ b/ajax.php
@@ -15,8 +15,9 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * Ajax callback script for dealing with quiz data
- * This callback handles saving questions as well as instructor actions
+ * Ajax callback script for dealing with quiz data.
+ *
+ * This callback handles saving questions as well as instructor actions.
  *
  * @package   mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>
@@ -27,6 +28,8 @@
 
 namespace mod_jazzquiz;
 
+use question_bank;
+
 define('AJAX_SCRIPT', true);
 
 require_once('../../config.php');
@@ -39,18 +42,17 @@
 
 /**
  * Send a list of all the questions tagged for use with improvisation.
+ *
  * @param jazzquiz $jazzquiz
- * @return mixed[]
+ * @return array
  */
-function show_all_improvise_questions(jazzquiz $jazzquiz) {
+function show_all_improvise_questions(jazzquiz $jazzquiz): array {
     $improviser = new improviser($jazzquiz);
     $questionrecords = $improviser->get_all_improvised_question_definitions();
-    debugging( 'show'.$questionrecords );
     if (!$questionrecords) {
-        debugging( 'No improvisation questions' );
         return [
             'status' => 'error',
-            'message' => 'No improvisation questions'
+            'message' => 'No improvisation questions',
         ];
     }
     $questions = [];
@@ -59,21 +61,22 @@ function show_all_improvise_questions(jazzquiz $jazzquiz) {
             'questionid' => $question->id,
             'jazzquizquestionid' => 0,
             'name' => str_replace('{IMPROV}', '', $question->name),
-            'time' => $jazzquiz->data->defaultquestiontime
+            'time' => $jazzquiz->data->defaultquestiontime,
         ];
     }
     return [
         'status' => 'success',
-        'questions' => $questions
+        'questions' => $questions,
     ];
 }
 
 /**
  * Send a list of all the questions added to the quiz.
+ *
  * @param jazzquiz $jazzquiz
- * @return mixed[]
+ * @return array
  */
-function show_all_jump_questions(jazzquiz $jazzquiz) {
+function show_all_jump_questions(jazzquiz $jazzquiz): array {
     global $DB;
     $sql = 'SELECT q.id AS id, q.name AS name, jq.questiontime AS time, jq.id AS jqid';
     $sql .= '  FROM {jazzquiz_questions} jq';
@@ -87,21 +90,22 @@ function show_all_jump_questions(jazzquiz $jazzquiz) {
             'questionid' => $question->id,
             'jazzquizquestionid' => $question->jqid,
             'name' => $question->name,
-            'time' => $question->time
+            'time' => $question->time,
         ];
     }
     return [
         'status' => 'success',
-        'questions' => $questions
+        'questions' => $questions,
     ];
 }
 
 /**
  * Get the form for the current question.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function get_question_form(jazzquiz_session $session) {
+function get_question_form(jazzquiz_session $session): array {
     $session->load_session_questions();
     $slot = optional_param('slot', 0, PARAM_INT);
     if ($slot === 0) {
@@ -111,12 +115,12 @@ function get_question_form(jazzquiz_session $session) {
     $js = '';
     $css = [];
     $isalreadysubmitted = true;
-    if (!$session->attempt->has_responded($slot)) {
+    if (!$session->myattempt->has_responded($slot)) {
         $jazzquiz = $session->jazzquiz;
         /** @var output\renderer $renderer */
         $renderer = $jazzquiz->renderer;
         $isinstructor = $jazzquiz->is_instructor();
-        list($html, $js, $css) = $renderer->render_question_form($slot, $session->attempt, $jazzquiz, $isinstructor);
+        list($html, $js, $css) = $renderer->render_question_form($slot, $session->myattempt, $jazzquiz, $isinstructor);
         $isalreadysubmitted = false;
     }
     $qtype = $session->get_question_type_by_slot($slot);
@@ -127,16 +131,17 @@ function get_question_form(jazzquiz_session $session) {
         'css' => $css,
         'question_type' => $qtype,
         'is_already_submitted' => $isalreadysubmitted,
-        'voteable' => !in_array($qtype, $voteable)
+        'voteable' => !in_array($qtype, $voteable),
     ];
 }
 
 /**
  * Start a new question.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function start_question(jazzquiz_session $session) {
+function start_question(jazzquiz_session $session): array {
     $session->load_session_questions();
     $session->load_attempts();
     $method = required_param('method', PARAM_ALPHA);
@@ -148,7 +153,9 @@ function start_question(jazzquiz_session $session) {
             $jazzquizquestionid = optional_param('jazzquizquestionid', 0, PARAM_INT);
             if ($jazzquizquestionid !== 0) {
                 $jazzquizquestion = $session->jazzquiz->get_question_by_id($jazzquizquestionid);
-                $session->data->slot = $jazzquizquestion->data->slot;
+                if ($jazzquizquestion) {
+                    $session->data->slot = $jazzquizquestion->data->slot;
+                }
             }
             break;
         case 'repoll':
@@ -156,7 +163,7 @@ function start_question(jazzquiz_session $session) {
             if ($lastslot === 0) {
                 return [
                     'status' => 'error',
-                    'message' => 'Nothing to repoll.'
+                    'message' => 'Nothing to repoll.',
                 ];
             }
             $questionid = $session->questions[$lastslot]->questionid;
@@ -167,7 +174,7 @@ function start_question(jazzquiz_session $session) {
             if ($session->data->slot >= $lastslot) {
                 return [
                     'status' => 'error',
-                    'message' => 'No next question.'
+                    'message' => 'No next question.',
                 ];
             }
             $session->data->slot++;
@@ -190,14 +197,14 @@ function start_question(jazzquiz_session $session) {
         default:
             return [
                 'status' => 'error',
-                'message' => "Invalid method $method"
+                'message' => "Invalid method $method",
             ];
     }
     list($success, $questiontime) = $session->start_question($questionid, $questiontime);
     if (!$success) {
         return [
             'status' => 'error',
-            'message' => "Failed to start question $questionid for session"
+            'message' => "Failed to start question $questionid for session",
         ];
     }
 
@@ -207,20 +214,21 @@ function start_question(jazzquiz_session $session) {
     return [
         'status' => 'success',
         'questiontime' => $questiontime,
-        'delay' => $session->data->nextstarttime - time()
+        'delay' => $session->data->nextstarttime - time(),
     ];
 }
 
 /**
  * Start the quiz.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function start_quiz(jazzquiz_session $session) {
+function start_quiz(jazzquiz_session $session): array {
     if ($session->data->status !== 'notrunning') {
         return [
             'status' => 'error',
-            'message' => 'Quiz is already running'
+            'message' => 'Quiz is already running',
         ];
     }
     $session->data->status = 'preparing';
@@ -230,15 +238,16 @@ function start_quiz(jazzquiz_session $session) {
 
 /**
  * Submit a response for the current question.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function save_question(jazzquiz_session $session) {
-    $attempt = $session->attempt;
+function save_question(jazzquiz_session $session): array {
+    $attempt = $session->myattempt;
     if (!$attempt->belongs_to_current_user()) {
         return [
             'status' => 'error',
-            'message' => 'Invalid user'
+            'message' => 'Invalid user',
         ];
     }
     $session->load_session_questions();
@@ -251,22 +260,23 @@ function save_question(jazzquiz_session $session) {
     }
     return [
         'status' => 'success',
-        'feedback' => $feedback
+        'feedback' => $feedback,
     ];
 }
 
 /**
  * Start a vote.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function run_voting(jazzquiz_session $session) {
+function run_voting(jazzquiz_session $session): array {
     $questions = required_param('questions', PARAM_RAW);
     $questions = json_decode(urldecode($questions), true);
     if (!$questions) {
         return [
             'status' => 'error',
-            'message' => 'Failed to decode questions'
+            'message' => 'Failed to decode questions',
         ];
     }
     $qtype = optional_param('question_type', '', PARAM_ALPHANUM);
@@ -283,10 +293,11 @@ function run_voting(jazzquiz_session $session) {
 
 /**
  * Save a vote.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function save_vote(jazzquiz_session $session) {
+function save_vote(jazzquiz_session $session): array {
     $voteid = required_param('vote', PARAM_INT);
     $vote = new jazzquiz_vote($session->data->id);
     $status = $vote->save_vote($voteid);
@@ -296,9 +307,9 @@ function save_vote(jazzquiz_session $session) {
 /**
  * Get the vote results.
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function get_vote_results(jazzquiz_session $session) {
+function get_vote_results(jazzquiz_session $session): array {
     $session->load_session_questions();
     $session->load_attempts();
     $slot = count($session->questions);
@@ -306,16 +317,17 @@ function get_vote_results(jazzquiz_session $session) {
     $votes = $vote->get_results();
     return [
         'answers' => $votes,
-        'total_students' => $session->get_student_count()
+        'total_students' => $session->get_student_count(),
     ];
 }
 
 /**
  * End the current question.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function end_question($session) {
+function end_question(jazzquiz_session $session): array {
     $session->data->status = 'reviewing';
     $session->save();
     return ['status' => 'success'];
@@ -323,20 +335,22 @@ function end_question($session) {
 
 /**
  * Get the correct answer for the current question.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function get_right_response(jazzquiz_session $session) {
+function get_right_response(jazzquiz_session $session): array {
     $session->load_session_questions();
     return ['right_answer' => $session->get_question_right_response()];
 }
 
 /**
  * Close a session.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function close_session(jazzquiz_session $session) {
+function close_session(jazzquiz_session $session): array {
     $session->load_attempts();
     $session->end_session();
     return ['status' => 'success'];
@@ -344,10 +358,11 @@ function close_session(jazzquiz_session $session) {
 
 /**
  * Get the results for a session.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function get_results(jazzquiz_session $session) {
+function get_results(jazzquiz_session $session): array {
     $session->load_session_questions();
     $session->load_attempts();
     $slot = count($session->questions);
@@ -365,16 +380,17 @@ function get_results(jazzquiz_session $session) {
         'responses' => $results['responses'],
         'responded' => $results['responded'],
         'total_students' => $results['student_count'],
-        'merge_count' => $mergecount
+        'merge_count' => $mergecount,
     ];
 }
 
 /**
  * Merge a response into another.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function merge_responses(jazzquiz_session $session) {
+function merge_responses(jazzquiz_session $session): array {
     $session->load_session_questions();
     $slot = optional_param('slot', count($session->questions), PARAM_INT);
     if (!isset($session->questions[$slot])) {
@@ -388,10 +404,11 @@ function merge_responses(jazzquiz_session $session) {
 
 /**
  * Undo the last merge.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function undo_merge(jazzquiz_session $session) {
+function undo_merge(jazzquiz_session $session): array {
     $session->load_session_questions();
     $slot = optional_param('slot', count($session->questions), PARAM_INT);
     if (!isset($session->questions[$slot])) {
@@ -403,9 +420,10 @@ function undo_merge(jazzquiz_session $session) {
 
 /**
  * Convert STACK (Maxima) string to LaTeX format.
- * @return mixed[]
+ *
+ * @return array
  */
-function stack_to_latex() {
+function stack_to_latex(): array {
     global $DB;
     $input = required_param('input', PARAM_RAW);
     $input = urldecode($input);
@@ -414,28 +432,29 @@ function stack_to_latex() {
         return [
             'message' => 'STACK question not found.',
             'latex' => $input,
-            'original' => $input
+            'original' => $input,
         ];
     }
 
     /** @var \qtype_stack_question $question */
-    $question = \question_bank::load_question($question->id);
+    $question = question_bank::load_question($question->id);
     $question->initialise_question_from_seed();
     $state = $question->get_input_state('ans1', ['ans1' => $input]);
     $latex = $state->contentsdisplayed;
 
     return [
         'latex' => $latex,
-        'original' => $input
+        'original' => $input,
     ];
 }
 
 /**
  * Retrieve the current state of the session.
+ *
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function session_info(jazzquiz_session $session) {
+function session_info(jazzquiz_session $session): array {
     global $DB;
     switch ($session->data->status) {
         // Just a generic response with the state.
@@ -445,7 +464,7 @@ function session_info(jazzquiz_session $session) {
                 $session->load_attempts();
                 return [
                     'status' => $session->data->status,
-                    'student_count' => $session->get_student_count()
+                    'student_count' => $session->get_student_count(),
                 ];
             }
             // Fall-through.
@@ -453,7 +472,7 @@ function session_info(jazzquiz_session $session) {
         case 'reviewing':
             return [
                 'status' => $session->data->status,
-                'slot' => $session->data->slot // For the preplanned questions.
+                'slot' => $session->data->slot, // For the preplanned questions.
             ];
 
         case 'voting':
@@ -466,7 +485,7 @@ function session_info(jazzquiz_session $session) {
                     'text' => $voteoption->attempt,
                     'id' => $voteoption->id,
                     'question_type' => $voteoption->qtype,
-                    'content_id' => "vote_answer_label_$i"
+                    'content_id' => "vote_answer_label_$i",
                 ];
                 $html .= '<label>';
                 $html .= '<input class="jazzquiz-select-vote" type="radio" name="vote" value="' . $voteoption->id . '">';
@@ -479,7 +498,7 @@ function session_info(jazzquiz_session $session) {
             return [
                 'status' => 'voting',
                 'html' => $html,
-                'options' => $options
+                'options' => $options,
             ];
 
         // Send the currently active question.
@@ -487,87 +506,69 @@ function session_info(jazzquiz_session $session) {
             return [
                 'status' => 'running',
                 'questiontime' => $session->data->currentquestiontime,
-                'delay' => $session->data->nextstarttime - time()
+                'delay' => $session->data->nextstarttime - time(),
             ];
 
         // This should not be reached, but if it ever is, let's just assume the quiz is not running.
         default:
             return [
                 'status' => 'notrunning',
-                'message' => 'Unknown error. State: ' . $session->data->status
+                'message' => 'Unknown error. State: ' . $session->data->status,
             ];
     }
 }
 
 /**
  * Handle an instructor request.
+ *
  * @param string $action
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function handle_instructor_request(string $action, jazzquiz_session $session) : array {
-    switch ($action) {
-        case 'start_quiz':
-            return start_quiz($session);
-        case 'get_question_form':
-            return get_question_form($session);
-        case 'save_question':
-            return save_question($session);
-        case 'list_improvise_questions':
-            return show_all_improvise_questions($session->jazzquiz);
-        case 'list_jump_questions':
-            return show_all_jump_questions($session->jazzquiz);
-        case 'run_voting':
-            return run_voting($session);
-        case 'get_vote_results':
-            return get_vote_results($session);
-        case 'get_results':
-            return get_results($session);
-        case 'start_question':
-            return start_question($session);
-        case 'end_question':
-            return end_question($session);
-        case 'get_right_response':
-            return get_right_response($session);
-        case 'merge_responses':
-            return merge_responses($session);
-        case 'undo_merge':
-            return undo_merge($session);
-        case 'close_session':
-            return close_session($session);
-        case 'info':
-            return session_info($session);
-        default:
-            return ['status' => 'error', 'message' => 'Invalid action'];
-    }
+function handle_instructor_request(string $action, jazzquiz_session $session): array {
+    return match ($action) {
+        'start_quiz' => start_quiz($session),
+        'get_question_form' => get_question_form($session),
+        'save_question' => save_question($session),
+        'list_improvise_questions' => show_all_improvise_questions($session->jazzquiz),
+        'list_jump_questions' => show_all_jump_questions($session->jazzquiz),
+        'run_voting' => run_voting($session),
+        'get_vote_results' => get_vote_results($session),
+        'get_results' => get_results($session),
+        'start_question' => start_question($session),
+        'end_question' => end_question($session),
+        'get_right_response' => get_right_response($session),
+        'merge_responses' => merge_responses($session),
+        'undo_merge' => undo_merge($session),
+        'close_session' => close_session($session),
+        'info' => session_info($session),
+        default => ['status' => 'error', 'message' => 'Invalid action'],
+    };
 }
 
 /**
  * Handle a student request.
+ *
  * @param string $action
  * @param jazzquiz_session $session
- * @return mixed[]
+ * @return array
  */
-function handle_student_request(string $action, jazzquiz_session $session) : array {
-    switch ($action) {
-        case 'save_question':
-            return save_question($session);
-        case 'save_vote':
-            return save_vote($session);
-        case 'get_question_form':
-            return get_question_form($session);
-        case 'info':
-            return session_info($session);
-        default:
-            return ['status' => 'error', 'message' => 'Invalid action'];
-    }
+function handle_student_request(string $action, jazzquiz_session $session): array {
+    return match ($action) {
+        'save_question' => save_question($session),
+        'save_vote' => save_vote($session),
+        'get_question_form' => get_question_form($session),
+        'info' => session_info($session),
+        default => ['status' => 'error', 'message' => 'Invalid action'],
+    };
 }
 
 /**
  * The entry point to handle instructor and student actions.
- * @return mixed[]
+ *
+ * @return array
  */
-function jazzquiz_ajax() {
+function jazzquiz_ajax(): array {
     $action = required_param('action', PARAM_ALPHANUMEXT);
 
     // TODO: Better solution if more non-session actions are added.
@@ -583,21 +584,21 @@ function jazzquiz_ajax() {
     if (!$session->data->sessionopen) {
         return [
             'status' => 'sessionclosed',
-            'message' => 'Session is closed'
+            'message' => 'Session is closed',
         ];
     }
 
-    $session->load_attempt();
-    if (!$session->attempt) {
+    $session->load_my_attempt();
+    if (!$session->myattempt) {
         return [
             'status' => 'error',
-            'message' => 'No attempt found'
+            'message' => 'No attempt found',
         ];
     }
-    if (!$session->attempt->is_active()) {
+    if (!$session->myattempt->is_active()) {
         return [
             'status' => 'error',
-            'message' => 'This attempt is not in progress'
+            'message' => 'This attempt is not in progress',
         ];
     }
 
diff --git a/amd/build.sh b/amd/build.sh
deleted file mode 100755
index a9c5431..0000000
--- a/amd/build.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-echo 'Copying...'
-cp -R src orig
-echo 'Running Babel...'
-babel orig -d src
-echo 'Running Grunt...'
-grunt amd --force
-echo 'Cleaning up...'
-rm -R src
-mv orig src
-echo 'Done.'
diff --git a/amd/build/core.min.js b/amd/build/core.min.js
index da0b0c1..2c47fc3 100644
--- a/amd/build/core.min.js
+++ b/amd/build/core.min.js
@@ -1,10 +1,10 @@
 /**
- * @package   mod_jazzquiz
+ * @module    mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>
  * @copyright 2014 University of Wisconsin - Madison
  * @copyright 2018 NTNU
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-define("mod_jazzquiz/core",["jquery","core/config","core/str","core/yui","core/event"],(function($,mConfig,mString,Y,mEvent){let session={courseModuleId:0,activityId:0,sessionId:0,attemptId:0,sessionKey:""},cache=[];class Ajax{static request(method,url,data,success){return data.id=session.courseModuleId,data.sessionid=session.sessionId,data.attemptid=session.attemptId,data.sesskey=session.sessionKey,$.ajax({type:method,url:url,data:data,dataType:"json",success:success,error:function(xhr,status,error){}}).fail((()=>setText(Quiz.info,"error_with_request")))}static get(action,data,success){return data.action=action,Ajax.request("get","ajax.php",data,success)}static post(action,data,success){return data.action=action,Ajax.request("post","ajax.php",data,success)}}class Question{constructor(quiz){this.quiz=quiz,this.isRunning=!1,this.isSaving=!1,this.endTime=0,this.isVoteRunning=!1,this.hasVotes=!1,this.countdownTimeLeft=0,this.questionTime=0,this.countdownInterval=0,this.timerInterval=0}static get box(){return $("#jazzquiz_question_box")}static get timer(){return $("#jazzquiz_question_timer")}static get form(){return $("#jazzquiz_question_form")}refresh(){Ajax.get("get_question_form",{},(data=>{data.is_already_submitted?setText(Quiz.info,"wait_for_instructor"):(Quiz.show(Question.box.html(data.html)),eval(data.js),data.css.forEach((cssUrl=>{let head=document.getElementsByTagName("head")[0],style=document.createElement("link");style.rel="stylesheet",style.type="text/css",style.href=cssUrl,head.appendChild(style)})),this.quiz.role.onQuestionRefreshed(data),Quiz.renderAllMathjax())}))}hideTimer(){Quiz.hide(Question.timer),clearInterval(this.timerInterval),this.timerInterval=0}onCountdownTick(questionTime){this.countdownTimeLeft--,this.countdownTimeLeft<=0?(clearInterval(this.countdownInterval),this.countdownInterval=0,this.startAttempt(questionTime)):0!==this.countdownTimeLeft?setText(Quiz.info,"question_will_start_in_x_seconds","jazzquiz",this.countdownTimeLeft):setText(Quiz.info,"question_will_start_now")}startCountdown(questionTime,countdownTimeLeft){return 0!==this.countdownInterval||(questionTime=parseInt(questionTime),countdownTimeLeft=parseInt(countdownTimeLeft),this.countdownTimeLeft=countdownTimeLeft,countdownTimeLeft<1?!(questionTime>0&&countdownTimeLeft<-questionTime)&&(questionTime>1?this.startAttempt(questionTime+countdownTimeLeft):this.startAttempt(0),!0):(this.countdownInterval=setInterval((()=>this.onCountdownTick(questionTime)),1e3),!0))}onTimerEnding(){this.isRunning=!1,this.quiz.role.onTimerEnding()}onTimerTick(){const currentTime=(new Date).getTime();if(currentTime>this.endTime)this.hideTimer(),this.onTimerEnding();else{const timeLeft=parseInt((this.endTime-currentTime)/1e3);this.quiz.role.onTimerTick(timeLeft)}}startAttempt(questionTime){Quiz.hide(Quiz.info),this.refresh(),this.isRunning=!0,0!==(questionTime=parseInt(questionTime))&&(this.quiz.role.onTimerTick(questionTime),this.endTime=(new Date).getTime()+1e3*questionTime,this.timerInterval=setInterval((()=>this.onTimerTick()),1e3))}static isLoaded(){return""!==Question.box.html()}}class Quiz{constructor(Role){this.state="",this.isNewState=!1,this.question=new Question(this),this.role=new Role(this),this.events={notrunning:"onNotRunning",preparing:"onPreparing",running:"onRunning",reviewing:"onReviewing",sessionclosed:"onSessionClosed",voting:"onVoting"}}changeQuizState(state,data){this.isNewState=this.state!==state,this.state=state,this.role.onStateChange(state);const event=this.events[state];this.role[event](data)}poll(ms){Ajax.get("info",{},(data=>{this.changeQuizState(data.status,data),setTimeout((()=>this.poll(ms)),ms)}))}static get main(){return $("#jazzquiz")}static get info(){return $("#jazzquiz_info_container")}static get responded(){return $("#jazzquiz_responded_container")}static get responses(){return $("#jazzquiz_responses_container")}static get responseInfo(){return $("#jazzquiz_response_info_container")}static hide($element){$element.addClass("hidden")}static show($element){$element.removeClass("hidden")}static uncheck($element){$element.children(".fa").removeClass("fa-check-square-o").addClass("fa-square-o")}static check($element){$element.children(".fa").removeClass("fa-square-o").addClass("fa-check-square-o")}static renderAllMathjax(){mEvent.notifyFilterContentUpdated(document.getElementsByClassName("jazzquiz-response-container"))}static addMathjaxElement($target,latex){$target.html('<span class="filter_mathjaxloader_equation">'+latex+"</span>"),Quiz.renderAllMathjax()}static renderMaximaEquation(input,targetId){null!==document.getElementById(targetId)&&(void 0===cache[input]?Ajax.get("stack",{input:encodeURIComponent(input)},(data=>{cache[data.original]=data.latex,Quiz.addMathjaxElement($("#"+targetId),data.latex)})):Quiz.addMathjaxElement($("#"+targetId),cache[input]))}}function setText($element,key,from,args){from=void 0!==from?from:"jazzquiz",args=void 0!==args?args:[],$.when(mString.get_string(key,from,args)).done((text=>Quiz.show($element.html(text))))}return{initialize:(courseModuleId,activityId,sessionId,attemptId,sessionKey)=>{session.courseModuleId=courseModuleId,session.activityId=activityId,session.sessionId=sessionId,session.attemptId=attemptId,session.sessionKey=sessionKey},Quiz:Quiz,Question:Question,Ajax:Ajax,setText:setText}}));
+define("mod_jazzquiz/core",["jquery","core/config","core/str","core/yui","core/event"],(function($,mConfig,mString,Y,mEvent){let session={courseModuleId:0,activityId:0,sessionId:0,attemptId:0,sessionKey:""},cache=[];class Ajax{static request(method,url,data,success){return data.id=session.courseModuleId,data.sessionid=session.sessionId,data.attemptid=session.attemptId,data.sesskey=session.sessionKey,$.ajax({type:method,url:url,data:data,dataType:"json",success:success}).fail((()=>setText(Quiz.info,"error_with_request")))}static get(action,data,success){return data.action=action,Ajax.request("get","ajax.php",data,success)}static post(action,data,success){return data.action=action,Ajax.request("post","ajax.php",data,success)}}class Question{constructor(quiz){this.quiz=quiz,this.isRunning=!1,this.isSaving=!1,this.endTime=0,this.isVoteRunning=!1,this.hasVotes=!1,this.countdownTimeLeft=0,this.questionTime=0,this.countdownInterval=0,this.timerInterval=0}static get box(){return $("#jazzquiz_question_box")}static get timer(){return $("#jazzquiz_question_timer")}static get form(){return $("#jazzquiz_question_form")}refresh(){Ajax.get("get_question_form",{},(data=>{data.is_already_submitted?setText(Quiz.info,"wait_for_instructor"):(Quiz.show(Question.box.html(data.html)),eval(data.js),data.css.forEach((cssUrl=>{let head=document.getElementsByTagName("head")[0],style=document.createElement("link");style.rel="stylesheet",style.type="text/css",style.href=cssUrl,head.appendChild(style)})),void 0!==this.quiz.role.onQuestionRefreshed&&this.quiz.role.onQuestionRefreshed(data),Quiz.renderAllMathjax())}))}hideTimer(){Quiz.hide(Question.timer),clearInterval(this.timerInterval),this.timerInterval=0}onCountdownTick(questionTime){this.countdownTimeLeft--,this.countdownTimeLeft<=0?(clearInterval(this.countdownInterval),this.countdownInterval=0,this.startAttempt(questionTime)):0!==this.countdownTimeLeft?setText(Quiz.info,"question_will_start_in_x_seconds","jazzquiz",this.countdownTimeLeft):setText(Quiz.info,"question_will_start_now")}startCountdown(questionTime,countdownTimeLeft){return 0!==this.countdownInterval||(questionTime=parseInt(questionTime),countdownTimeLeft=parseInt(countdownTimeLeft),this.countdownTimeLeft=countdownTimeLeft,countdownTimeLeft<1?!(questionTime>0&&countdownTimeLeft<-questionTime)&&(questionTime>1?this.startAttempt(questionTime+countdownTimeLeft):this.startAttempt(0),!0):(this.countdownInterval=setInterval((()=>this.onCountdownTick(questionTime)),1e3),!0))}onTimerEnding(){this.isRunning=!1,this.quiz.role.onTimerEnding()}onTimerTick(){const currentTime=(new Date).getTime();if(currentTime>this.endTime)this.hideTimer(),this.onTimerEnding();else{const timeLeft=parseInt((this.endTime-currentTime)/1e3);this.quiz.role.onTimerTick(timeLeft)}}startAttempt(questionTime){Quiz.hide(Quiz.info),this.refresh(),this.isRunning=!0,0!==(questionTime=parseInt(questionTime))&&(this.quiz.role.onTimerTick(questionTime),this.endTime=(new Date).getTime()+1e3*questionTime,this.timerInterval=setInterval((()=>this.onTimerTick()),1e3))}static isLoaded(){return""!==Question.box.html()}}class Quiz{constructor(Role){this.state="",this.isNewState=!1,this.question=new Question(this),this.role=new Role(this),this.events={notrunning:"onNotRunning",preparing:"onPreparing",running:"onRunning",reviewing:"onReviewing",sessionclosed:"onSessionClosed",voting:"onVoting"}}changeQuizState(state,data){this.isNewState=this.state!==state,this.state=state,void 0!==this.role.onStateChange&&this.role.onStateChange();const event=this.events[state];this.role[event](data)}poll(ms){Ajax.get("info",{},(data=>{this.changeQuizState(data.status,data),setTimeout((()=>this.poll(ms)),ms)}))}static get main(){return $("#jazzquiz")}static get info(){return $("#jazzquiz_info_container")}static get responded(){return $("#jazzquiz_responded_container")}static get responses(){return $("#jazzquiz_responses_container")}static get responseInfo(){return $("#jazzquiz_response_info_container")}static hide($element){$element.addClass("hidden")}static show($element){$element.removeClass("hidden")}static uncheck($element){$element.children(".fa").removeClass("fa-check-square-o").addClass("fa-square-o")}static check($element){$element.children(".fa").removeClass("fa-square-o").addClass("fa-check-square-o")}static renderAllMathjax(){mEvent.notifyFilterContentUpdated(document.getElementsByClassName("jazzquiz-response-container"))}static addMathjaxElement($target,latex){$target.html('<span class="filter_mathjaxloader_equation">'+latex+"</span>"),Quiz.renderAllMathjax()}static renderMaximaEquation(input,targetId){null!==document.getElementById(targetId)&&(void 0===cache[input]?Ajax.get("stack",{input:encodeURIComponent(input)},(data=>{cache[data.original]=data.latex,Quiz.addMathjaxElement($("#"+targetId),data.latex)})):Quiz.addMathjaxElement($("#"+targetId),cache[input]))}}function setText($element,key,from,args){from=void 0!==from?from:"jazzquiz",args=void 0!==args?args:[],$.when(mString.get_string(key,from,args)).done((text=>Quiz.show($element.html(text))))}return{initialize:(courseModuleId,activityId,sessionId,attemptId,sessionKey)=>{session.courseModuleId=courseModuleId,session.activityId=activityId,session.sessionId=sessionId,session.attemptId=attemptId,session.sessionKey=sessionKey},Quiz:Quiz,Question:Question,Ajax:Ajax,setText:setText}}));
 
 //# sourceMappingURL=core.min.js.map
\ No newline at end of file
diff --git a/amd/build/core.min.js.map b/amd/build/core.min.js.map
index dc48efc..a5366be 100644
--- a/amd/build/core.min.js.map
+++ b/amd/build/core.min.js.map
@@ -1 +1 @@
-{"version":3,"file":"core.min.js","sources":["../src/core.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * @package   mod_jazzquiz\n * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>\n * @copyright 2014 University of Wisconsin - Madison\n * @copyright 2018 NTNU\n * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\ndefine(['jquery', 'core/config', 'core/str', 'core/yui', 'core/event'], function ($, mConfig, mString, Y, mEvent) {\n\n    // Contains the needed values for using the ajax script.\n    let session = {\n        courseModuleId: 0,\n        activityId: 0, // TODO: Remove activityId? Unsure if used.\n        sessionId: 0,\n        attemptId: 0,\n        sessionKey: ''\n    };\n\n    // Used for caching the latex of maxima input.\n    let cache = [];\n\n    // TODO: Migrate to core/ajax module?\n    class Ajax {\n\n        /**\n         * Send a request using AJAX, with method specified.\n         * @param {string} method Which HTTP method to use.\n         * @param {string} url Relative to root of jazzquiz module. Does not start with /.\n         * @param {Object} data Object with parameters as properties. Reserved: id, quizid, sessionid, attemptid, sesskey\n         * @param {function} success Callback function for when the request was completed successfully.\n         * @return {jqXHR} The jQuery XHR object\n         */\n        static request(method, url, data, success) {\n            data.id = session.courseModuleId;\n            data.sessionid = session.sessionId;\n            data.attemptid = session.attemptId;\n            data.sesskey = session.sessionKey;\n            return $.ajax({\n                type: method,\n                url: url,\n                data: data,\n                dataType: 'json',\n                success: success,\n                error: function (xhr, status, error) {\n                    //console.error('XHR Error: ' + error + '. Status: ' + status);\n                }\n            }).fail(() => setText(Quiz.info, 'error_with_request'));\n        }\n\n        /**\n         * Send a GET request using AJAX.\n         * @param {string} action Which action to query.\n         * @param {Object} data Object with parameters as properties. Reserved: id, quizid, sessionid, attemptid, sesskey\n         * @param {function} success Callback function for when the request was completed successfully.\n         * @return {jqXHR} The jQuery XHR object\n         */\n        static get(action, data, success) {\n            data.action = action;\n            return Ajax.request('get', 'ajax.php', data, success);\n        }\n\n        /**\n         * Send a POST request using AJAX.\n         * @param {string} action Which action to query.\n         * @param {Object} data Object with parameters as properties. Reserved: id, quizid, sessionid, attemptid, sesskey\n         * @param {function} success Callback function for when the request was completed successfully.\n         * @return {jqXHR} The jQuery XHR object\n         */\n        static post(action, data, success) {\n            data.action = action;\n            return Ajax.request('post', 'ajax.php', data, success);\n        }\n\n    }\n\n    class Question {\n\n        constructor(quiz) {\n            this.quiz = quiz;\n            this.isRunning = false;\n            this.isSaving = false;\n            this.endTime = 0;\n            this.isVoteRunning = false;\n            this.hasVotes = false;\n            this.countdownTimeLeft = 0;\n            this.questionTime = 0;\n            this.countdownInterval = 0;\n            this.timerInterval = 0;\n        }\n\n        static get box() {\n            return $('#jazzquiz_question_box');\n        }\n\n        static get timer() {\n            return $('#jazzquiz_question_timer');\n        }\n\n        static get form() {\n            return $('#jazzquiz_question_form');\n        }\n\n        /**\n         * Request the current question form.\n         */\n        refresh() {\n            Ajax.get('get_question_form', {}, data => {\n                if (data.is_already_submitted) {\n                    setText(Quiz.info, 'wait_for_instructor');\n                    return;\n                }\n                Quiz.show(Question.box.html(data.html));\n                eval(data.js);\n                data.css.forEach(cssUrl => {\n                    let head = document.getElementsByTagName('head')[0];\n                    let style = document.createElement('link');\n                    style.rel = 'stylesheet';\n                    style.type = 'text/css';\n                    style.href = cssUrl;\n                    head.appendChild(style);\n                });\n                this.quiz.role.onQuestionRefreshed(data);\n                Quiz.renderAllMathjax();\n            });\n        }\n\n        /**\n         * Hide the question \"ending in\" timer, and clears the interval.\n         */\n        hideTimer() {\n            Quiz.hide(Question.timer);\n            clearInterval(this.timerInterval);\n            this.timerInterval = 0;\n        }\n\n        /**\n         * Is called for every second of the question countdown.\n         * @param {number} questionTime in seconds\n         */\n        onCountdownTick(questionTime) {\n            this.countdownTimeLeft--;\n            if (this.countdownTimeLeft <= 0) {\n                clearInterval(this.countdownInterval);\n                this.countdownInterval = 0;\n                this.startAttempt(questionTime);\n            } else if (this.countdownTimeLeft !== 0) {\n                setText(Quiz.info, 'question_will_start_in_x_seconds', 'jazzquiz', this.countdownTimeLeft);\n            } else {\n                setText(Quiz.info, 'question_will_start_now');\n            }\n        }\n\n        /**\n         * Start a countdown for the question which will eventually start the question attempt.\n         * The question attempt might start before this function return, depending on the arguments.\n         * If a countdown has already been started, this call will return true and the current countdown will continue.\n         * @param {number} questionTime\n         * @param {number} countdownTimeLeft\n         * @return {boolean} true if countdown is active\n         */\n        startCountdown(questionTime, countdownTimeLeft) {\n            if (this.countdownInterval !== 0) {\n                return true;\n            }\n            questionTime = parseInt(questionTime);\n            countdownTimeLeft = parseInt(countdownTimeLeft);\n            this.countdownTimeLeft = countdownTimeLeft;\n            if (countdownTimeLeft < 1) {\n                // Check if the question has already ended.\n                if (questionTime > 0 && countdownTimeLeft < -questionTime) {\n                    return false;\n                }\n                // No need to start the countdown. Just start the question.\n                if (questionTime > 1) {\n                    this.startAttempt(questionTime + countdownTimeLeft);\n                } else {\n                    this.startAttempt(0);\n                }\n                return true;\n            }\n            this.countdownInterval = setInterval(() => this.onCountdownTick(questionTime), 1000);\n            return true;\n        }\n\n        /**\n         * When the question \"ending in\" timer reaches 0 seconds, this will be called.\n         */\n        onTimerEnding() {\n            this.isRunning = false;\n            this.quiz.role.onTimerEnding();\n        }\n\n        /**\n         * Is called for every second of the \"ending in\" timer.\n         */\n        onTimerTick() {\n            const currentTime = new Date().getTime();\n            if (currentTime > this.endTime) {\n                this.hideTimer();\n                this.onTimerEnding();\n            } else {\n                const timeLeft = parseInt((this.endTime - currentTime) / 1000);\n                this.quiz.role.onTimerTick(timeLeft);\n            }\n        }\n\n        /**\n         * Request the current question from the server.\n         * @param {number} questionTime\n         */\n        startAttempt(questionTime) {\n            Quiz.hide(Quiz.info);\n            this.refresh();\n            // Set this to true so that we don't keep calling this over and over.\n            this.isRunning = true;\n            questionTime = parseInt(questionTime);\n            if (questionTime === 0) {\n                // 0 means no timer.\n                return;\n            }\n            this.quiz.role.onTimerTick(questionTime); // TODO: Is it worth having this line?\n            this.endTime = new Date().getTime() + questionTime * 1000;\n            this.timerInterval = setInterval(() => this.onTimerTick(), 1000);\n        }\n\n        static isLoaded() {\n            return Question.box.html() !== '';\n        }\n\n    }\n\n    class Quiz {\n\n        constructor(Role) {\n            this.state = '';\n            this.isNewState = false;\n            this.question = new Question(this);\n            this.role = new Role(this);\n            this.events = {\n                notrunning: 'onNotRunning',\n                preparing: 'onPreparing',\n                running: 'onRunning',\n                reviewing: 'onReviewing',\n                sessionclosed: 'onSessionClosed',\n                voting: 'onVoting'\n            };\n        }\n\n        changeQuizState(state, data) {\n            this.isNewState = (this.state !== state);\n            this.state = state;\n            this.role.onStateChange(state);\n            const event = this.events[state];\n            this.role[event](data);\n        }\n\n        /**\n         * Initiate the chained session info calls to ajax.php\n         * @param {number} ms interval in milliseconds\n         */\n        poll(ms) {\n            Ajax.get('info', {}, data => {\n                this.changeQuizState(data.status, data);\n                setTimeout(() => this.poll(ms), ms);\n            });\n        }\n\n        static get main() {\n            return $('#jazzquiz');\n        }\n\n        static get info() {\n            return $('#jazzquiz_info_container');\n        }\n\n        static get responded() {\n            return $('#jazzquiz_responded_container');\n        }\n\n        static get responses() {\n            return $('#jazzquiz_responses_container');\n        }\n\n        static get responseInfo() {\n            return $('#jazzquiz_response_info_container');\n        }\n\n        static hide($element) {\n            $element.addClass('hidden');\n        }\n\n        static show($element) {\n            $element.removeClass('hidden');\n        }\n\n        static uncheck($element) {\n            $element.children('.fa').removeClass('fa-check-square-o').addClass('fa-square-o');\n        }\n\n        static check($element) {\n            $element.children('.fa').removeClass('fa-square-o').addClass('fa-check-square-o');\n        }\n\n        /**\n         * Triggers a dynamic content update event, which MathJax listens to.\n         */\n        static renderAllMathjax() {\n            mEvent.notifyFilterContentUpdated(document.getElementsByClassName('jazzquiz-response-container'));\n        }\n\n        /**\n         * Sets the body of the target, and triggers an event letting MathJax know about the element.\n         * @param {*} $target\n         * @param {string} latex\n         */\n        static addMathjaxElement($target, latex) {\n            $target.html('<span class=\"filter_mathjaxloader_equation\">' + latex + '</span>');\n            Quiz.renderAllMathjax();\n        }\n\n        /**\n         * Converts the input to LaTeX and renders it to the target with MathJax.\n         * @param {string} input\n         * @param {string} targetId\n         */\n        static renderMaximaEquation(input, targetId) {\n            const target = document.getElementById(targetId);\n            if (target === null) {\n                //console.error('Target element #' + targetId + ' not found.');\n                return;\n            }\n            if (cache[input] !== undefined) {\n                Quiz.addMathjaxElement($('#' + targetId), cache[input]);\n                return;\n            }\n            Ajax.get('stack', {input: encodeURIComponent(input)}, data => {\n                cache[data.original] = data.latex;\n                Quiz.addMathjaxElement($('#' + targetId), data.latex);\n            });\n        }\n\n    }\n\n    /**\n     * Retrieve a language string that was sent along with the page.\n     * @param $element\n     * @param {string} key Which string in the language file we want.\n     * @param {string} [from=jazzquiz] Which language file we want the string from. Default is jazzquiz.\n     * @param [args] This is {$a} in the string for the key.\n     */\n    function setText($element, key, from, args) {\n        from = (from !== undefined) ? from : 'jazzquiz';\n        args = (args !== undefined) ? args : [];\n        $.when(mString.get_string(key, from, args)).done(text => Quiz.show($element.html(text)));\n    }\n\n    return {\n        initialize: (courseModuleId, activityId, sessionId, attemptId, sessionKey) => {\n            session.courseModuleId = courseModuleId;\n            session.activityId = activityId;\n            session.sessionId = sessionId;\n            session.attemptId = attemptId;\n            session.sessionKey = sessionKey;\n        },\n        Quiz: Quiz,\n        Question: Question,\n        Ajax: Ajax,\n        setText: setText\n    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+{"version":3,"file":"core.min.js","sources":["../src/core.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * @module    mod_jazzquiz\n * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>\n * @copyright 2014 University of Wisconsin - Madison\n * @copyright 2018 NTNU\n * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\ndefine(['jquery', 'core/config', 'core/str', 'core/yui', 'core/event'], function($, mConfig, mString, Y, mEvent) {\n\n    // Contains the needed values for using the ajax script.\n    let session = {\n        courseModuleId: 0,\n        activityId: 0, // TODO: Remove activityId? Unsure if used.\n        sessionId: 0,\n        attemptId: 0,\n        sessionKey: ''\n    };\n\n    // Used for caching the latex of maxima input.\n    let cache = [];\n\n    // TODO: Migrate to core/ajax module?\n    class Ajax {\n\n        /**\n         * Send a request using AJAX, with method specified.\n         *\n         * @param {string} method Which HTTP method to use.\n         * @param {string} url Relative to root of jazzquiz module. Does not start with /.\n         * @param {Object} data Object with parameters as properties. Reserved: id, quizid, sessionid, attemptid, sesskey\n         * @param {function} success Callback function for when the request was completed successfully.\n         * @return {jqXHR} The jQuery XHR object\n         */\n        static request(method, url, data, success) {\n            data.id = session.courseModuleId;\n            data.sessionid = session.sessionId;\n            data.attemptid = session.attemptId;\n            data.sesskey = session.sessionKey;\n            return $.ajax({\n                type: method,\n                url: url,\n                data: data,\n                dataType: 'json',\n                success: success\n            }).fail(() => setText(Quiz.info, 'error_with_request'));\n        }\n\n        /**\n         * Send a GET request using AJAX.\n         * @param {string} action Which action to query.\n         * @param {Object} data Object with parameters as properties. Reserved: id, quizid, sessionid, attemptid, sesskey\n         * @param {function} success Callback function for when the request was completed successfully.\n         * @return {jqXHR} The jQuery XHR object\n         */\n        static get(action, data, success) {\n            data.action = action;\n            return Ajax.request('get', 'ajax.php', data, success);\n        }\n\n        /**\n         * Send a POST request using AJAX.\n         * @param {string} action Which action to query.\n         * @param {Object} data Object with parameters as properties. Reserved: id, quizid, sessionid, attemptid, sesskey\n         * @param {function} success Callback function for when the request was completed successfully.\n         * @return {jqXHR} The jQuery XHR object\n         */\n        static post(action, data, success) {\n            data.action = action;\n            return Ajax.request('post', 'ajax.php', data, success);\n        }\n\n    }\n\n    class Question {\n\n        constructor(quiz) {\n            this.quiz = quiz;\n            this.isRunning = false;\n            this.isSaving = false;\n            this.endTime = 0;\n            this.isVoteRunning = false;\n            this.hasVotes = false;\n            this.countdownTimeLeft = 0;\n            this.questionTime = 0;\n            this.countdownInterval = 0;\n            this.timerInterval = 0;\n        }\n\n        static get box() {\n            return $('#jazzquiz_question_box');\n        }\n\n        static get timer() {\n            return $('#jazzquiz_question_timer');\n        }\n\n        static get form() {\n            return $('#jazzquiz_question_form');\n        }\n\n        /**\n         * Request the current question form.\n         */\n        refresh() {\n            Ajax.get('get_question_form', {}, data => {\n                if (data.is_already_submitted) {\n                    setText(Quiz.info, 'wait_for_instructor');\n                    return;\n                }\n                Quiz.show(Question.box.html(data.html));\n                // eslint-disable-next-line no-eval\n                eval(data.js);\n                data.css.forEach(cssUrl => {\n                    let head = document.getElementsByTagName('head')[0];\n                    let style = document.createElement('link');\n                    style.rel = 'stylesheet';\n                    style.type = 'text/css';\n                    style.href = cssUrl;\n                    head.appendChild(style);\n                });\n                if (this.quiz.role.onQuestionRefreshed !== undefined) {\n                    this.quiz.role.onQuestionRefreshed(data);\n                }\n                Quiz.renderAllMathjax();\n            });\n        }\n\n        /**\n         * Hide the question \"ending in\" timer, and clears the interval.\n         */\n        hideTimer() {\n            Quiz.hide(Question.timer);\n            clearInterval(this.timerInterval);\n            this.timerInterval = 0;\n        }\n\n        /**\n         * Is called for every second of the question countdown.\n         * @param {number} questionTime in seconds\n         */\n        onCountdownTick(questionTime) {\n            this.countdownTimeLeft--;\n            if (this.countdownTimeLeft <= 0) {\n                clearInterval(this.countdownInterval);\n                this.countdownInterval = 0;\n                this.startAttempt(questionTime);\n            } else if (this.countdownTimeLeft !== 0) {\n                setText(Quiz.info, 'question_will_start_in_x_seconds', 'jazzquiz', this.countdownTimeLeft);\n            } else {\n                setText(Quiz.info, 'question_will_start_now');\n            }\n        }\n\n        /**\n         * Start a countdown for the question which will eventually start the question attempt.\n         * The question attempt might start before this function return, depending on the arguments.\n         * If a countdown has already been started, this call will return true and the current countdown will continue.\n         * @param {number} questionTime\n         * @param {number} countdownTimeLeft\n         * @return {boolean} true if countdown is active\n         */\n        startCountdown(questionTime, countdownTimeLeft) {\n            if (this.countdownInterval !== 0) {\n                return true;\n            }\n            questionTime = parseInt(questionTime);\n            countdownTimeLeft = parseInt(countdownTimeLeft);\n            this.countdownTimeLeft = countdownTimeLeft;\n            if (countdownTimeLeft < 1) {\n                // Check if the question has already ended.\n                if (questionTime > 0 && countdownTimeLeft < -questionTime) {\n                    return false;\n                }\n                // No need to start the countdown. Just start the question.\n                if (questionTime > 1) {\n                    this.startAttempt(questionTime + countdownTimeLeft);\n                } else {\n                    this.startAttempt(0);\n                }\n                return true;\n            }\n            this.countdownInterval = setInterval(() => this.onCountdownTick(questionTime), 1000);\n            return true;\n        }\n\n        /**\n         * When the question \"ending in\" timer reaches 0 seconds, this will be called.\n         */\n        onTimerEnding() {\n            this.isRunning = false;\n            this.quiz.role.onTimerEnding();\n        }\n\n        /**\n         * Is called for every second of the \"ending in\" timer.\n         */\n        onTimerTick() {\n            const currentTime = new Date().getTime();\n            if (currentTime > this.endTime) {\n                this.hideTimer();\n                this.onTimerEnding();\n            } else {\n                const timeLeft = parseInt((this.endTime - currentTime) / 1000);\n                this.quiz.role.onTimerTick(timeLeft);\n            }\n        }\n\n        /**\n         * Request the current question from the server.\n         * @param {number} questionTime\n         */\n        startAttempt(questionTime) {\n            Quiz.hide(Quiz.info);\n            this.refresh();\n            // Set this to true so that we don't keep calling this over and over.\n            this.isRunning = true;\n            questionTime = parseInt(questionTime);\n            if (questionTime === 0) {\n                // 0 means no timer.\n                return;\n            }\n            this.quiz.role.onTimerTick(questionTime); // TODO: Is it worth having this line?\n            this.endTime = new Date().getTime() + questionTime * 1000;\n            this.timerInterval = setInterval(() => this.onTimerTick(), 1000);\n        }\n\n        static isLoaded() {\n            return Question.box.html() !== '';\n        }\n\n    }\n\n    class Quiz {\n\n        constructor(Role) {\n            this.state = '';\n            this.isNewState = false;\n            this.question = new Question(this);\n            this.role = new Role(this);\n            this.events = {\n                notrunning: 'onNotRunning',\n                preparing: 'onPreparing',\n                running: 'onRunning',\n                reviewing: 'onReviewing',\n                sessionclosed: 'onSessionClosed',\n                voting: 'onVoting'\n            };\n        }\n\n        changeQuizState(state, data) {\n            this.isNewState = (this.state !== state);\n            this.state = state;\n            if (this.role.onStateChange !== undefined) {\n                this.role.onStateChange();\n            }\n            const event = this.events[state];\n            this.role[event](data);\n        }\n\n        /**\n         * Initiate the chained session info calls to ajax.php\n         * @param {number} ms interval in milliseconds\n         */\n        poll(ms) {\n            Ajax.get('info', {}, data => {\n                this.changeQuizState(data.status, data);\n                setTimeout(() => this.poll(ms), ms);\n            });\n        }\n\n        static get main() {\n            return $('#jazzquiz');\n        }\n\n        static get info() {\n            return $('#jazzquiz_info_container');\n        }\n\n        static get responded() {\n            return $('#jazzquiz_responded_container');\n        }\n\n        static get responses() {\n            return $('#jazzquiz_responses_container');\n        }\n\n        static get responseInfo() {\n            return $('#jazzquiz_response_info_container');\n        }\n\n        static hide($element) {\n            $element.addClass('hidden');\n        }\n\n        static show($element) {\n            $element.removeClass('hidden');\n        }\n\n        static uncheck($element) {\n            $element.children('.fa').removeClass('fa-check-square-o').addClass('fa-square-o');\n        }\n\n        static check($element) {\n            $element.children('.fa').removeClass('fa-square-o').addClass('fa-check-square-o');\n        }\n\n        /**\n         * Triggers a dynamic content update event, which MathJax listens to.\n         */\n        static renderAllMathjax() {\n            mEvent.notifyFilterContentUpdated(document.getElementsByClassName('jazzquiz-response-container'));\n        }\n\n        /**\n         * Sets the body of the target, and triggers an event letting MathJax know about the element.\n         * @param {*} $target\n         * @param {string} latex\n         */\n        static addMathjaxElement($target, latex) {\n            $target.html('<span class=\"filter_mathjaxloader_equation\">' + latex + '</span>');\n            Quiz.renderAllMathjax();\n        }\n\n        /**\n         * Converts the input to LaTeX and renders it to the target with MathJax.\n         * @param {string} input\n         * @param {string} targetId\n         */\n        static renderMaximaEquation(input, targetId) {\n            const target = document.getElementById(targetId);\n            if (target === null) {\n                // Log error to console: 'Target element #' + targetId + ' not found.'.\n                return;\n            }\n            if (cache[input] !== undefined) {\n                Quiz.addMathjaxElement($('#' + targetId), cache[input]);\n                return;\n            }\n            Ajax.get('stack', {input: encodeURIComponent(input)}, data => {\n                cache[data.original] = data.latex;\n                Quiz.addMathjaxElement($('#' + targetId), data.latex);\n            });\n        }\n\n    }\n\n    /**\n     * Retrieve a language string that was sent along with the page.\n     * @param {*} $element\n     * @param {string} key Which string in the language file we want.\n     * @param {string} [from=jazzquiz] Which language file we want the string from. Default is jazzquiz.\n     * @param {array} [args=[]] This is {$a} in the string for the key.\n     */\n    function setText($element, key, from, args) {\n        from = (from !== undefined) ? from : 'jazzquiz';\n        args = (args !== undefined) ? args : [];\n        $.when(mString.get_string(key, from, args)).done(text => Quiz.show($element.html(text)));\n    }\n\n    return {\n        initialize: (courseModuleId, activityId, sessionId, attemptId, sessionKey) => {\n            session.courseModuleId = courseModuleId;\n            session.activityId = activityId;\n            session.sessionId = sessionId;\n            session.attemptId = attemptId;\n            session.sessionKey = sessionKey;\n        },\n        Quiz: Quiz,\n        Question: Question,\n        Ajax: Ajax,\n        setText: setText\n    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diff --git a/amd/build/instructor.min.js b/amd/build/instructor.min.js
index f8db5a4..e295e83 100644
--- a/amd/build/instructor.min.js
+++ b/amd/build/instructor.min.js
@@ -1,10 +1,10 @@
 /**
- * @package   mod_jazzquiz
+ * @module    mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>
  * @copyright 2014 University of Wisconsin - Madison
  * @copyright 2018 NTNU
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-define("mod_jazzquiz/instructor",["jquery","mod_jazzquiz/core"],(function($,Jazz){const Quiz=Jazz.Quiz,Question=Jazz.Question,Ajax=Jazz.Ajax,setText=Jazz.setText;class ResponseView{constructor(quiz){this.quiz=quiz,this.currentResponses=[],this.showVotesUponReview=!1,this.respondedCount=0,this.showResponses=!1,this.totalStudents=0,$(document).on("click","#jazzquiz_undo_merge",(()=>this.undoMerge())),$(document).on("click",(event=>{event.target.classList.contains("bar")?this.startMerge(event.target.id):event.target.parentNode&&event.target.parentNode.classList.contains("bar")&&this.startMerge(event.target.parentNode.id)})),$(document).on("click","#review_show_normal_results",(()=>this.refresh(!1))),$(document).on("click","#review_show_vote_results",(()=>this.refreshVotes()))}clear(){Quiz.responses.html(""),Quiz.responseInfo.html("")}hide(){Quiz.uncheck(Instructor.control("responses")),Quiz.hide(Quiz.responses),Quiz.hide(Quiz.responseInfo)}show(){Quiz.check(Instructor.control("responses")),Quiz.show(Quiz.responses),Quiz.show(Quiz.responseInfo),this.showVotesUponReview?(this.refreshVotes(),this.showVotesUponReview=!1):this.refresh(!1)}toggle(){this.showResponses=!this.showResponses,this.showResponses?this.show():this.hide()}endMerge(){$(".merge-into").removeClass("merge-into"),$(".merge-from").removeClass("merge-from")}undoMerge(){Ajax.post("undo_merge",{},(()=>this.refresh(!0)))}merge(from,into){Ajax.post("merge_responses",{from:from,into:into},(()=>this.refresh(!1)))}startMerge(fromRowBarId){const $barCell=$("#"+fromRowBarId);let $row=$barCell.parent();if($row.hasClass("merge-from"))this.endMerge();else{if($row.hasClass("merge-into")){const $fromRow=$(".merge-from");return this.merge($fromRow.data("response"),$row.data("response")),void this.endMerge()}$row.addClass("merge-from"),$row.parent().parent().find("tr").each((function(){$(this).find("td")[1].id!==$barCell.attr("id")&&$(this).addClass("merge-into")}))}}createControls(name){if(this.quiz.question.hasVotes){if("reviewing"===this.quiz.state){let $showNormalResult=$("#review_show_normal_results"),$showVoteResult=$("#review_show_vote_results");Quiz.show(Quiz.responseInfo),"vote_response"===name?0===$showNormalResult.length&&(setText(Quiz.responseInfo.html('<h4 class="inline"></h4>').children("h4"),"showing_vote_results"),Quiz.responseInfo.append('<button id="review_show_normal_results" class="btn btn-primary"></button><br>'),setText($("#review_show_normal_results"),"click_to_show_original_results"),$showVoteResult.remove()):"current_response"===name&&0===$showVoteResult.length&&(setText(Quiz.responseInfo.html('<h4 class="inline"></h4>').children("h4"),"showing_original_results"),Quiz.responseInfo.append('<button id="review_show_vote_results" class="btn btn-primary"></button><br>'),setText($("#review_show_vote_results"),"click_to_show_vote_results"),$showNormalResult.remove())}}else Quiz.hide(Quiz.responseInfo)}createBarGraph(responses,name,targetId,graphId,rebuild){let target=document.getElementById(targetId);if(null===target)return;let total=0,highestResponseCount=0;for(let i=0;i<responses.length;i++){let count=parseInt(responses[i].count);total+=count,count>highestResponseCount&&(highestResponseCount=count)}0===total&&(total=1),rebuild&&(target.innerHTML="");for(let i=0;i<target.rows.length;i++){let prune=!0;for(let j=0;j<responses.length;j++)if(target.rows[i].dataset.response===responses[j].response){prune=!1;break}prune&&(target.deleteRow(i),i--)}this.createControls(name),name+=graphId;for(let i=0;i<responses.length;i++){const percent=parseInt(responses[i].count)/highestResponseCount*100;let rowIndex=-1,currentRowIndex=-1;for(let j=0;j<target.rows.length;j++)if(target.rows[j].dataset.response===responses[i].response){rowIndex=target.rows[j].dataset.row_i,currentRowIndex=j;break}if(-1===rowIndex){rowIndex=target.rows.length;let row=target.insertRow();row.dataset.response_i=i,row.dataset.response=responses[i].response,row.dataset.percent=percent,row.dataset.row_i=rowIndex,row.dataset.count=responses[i].count,row.classList.add("selected-vote-option"),percent<15&&row.classList.add("outside");const countHtml='<span id="'+name+"_count_"+rowIndex+'">'+responses[i].count+"</span>";let responseCell=row.insertCell(0);responseCell.onclick=function(){$(this).parent().toggleClass("selected-vote-option")};let barCell=row.insertCell(1);barCell.classList.add("bar"),barCell.id=name+"_bar_"+rowIndex,barCell.innerHTML='<div style="width:'+percent+'%;">'+countHtml+"</div>";const latexId=name+"_latex_"+rowIndex;responseCell.innerHTML='<span id="'+latexId+'"></span>',Quiz.addMathjaxElement($("#"+latexId),responses[i].response),"stack"===responses[i].qtype&&Quiz.renderMaximaEquation(responses[i].response,latexId)}else{let currentRow=target.rows[currentRowIndex];currentRow.dataset.row_i=rowIndex,currentRow.dataset.response_i=i,currentRow.dataset.percent=percent,currentRow.dataset.count=responses[i].count;const containsOutside=currentRow.classList.contains("outside");percent>15&&containsOutside?currentRow.classList.remove("outside"):percent<15&&!containsOutside&&currentRow.classList.add("outside");let countElement=document.getElementById(name+"_count_"+rowIndex);null!==countElement&&(countElement.innerHTML=responses[i].count);let barElement=document.getElementById(name+"_bar_"+rowIndex);null!==barElement&&(barElement.firstElementChild.style.width=percent+"%")}}}static sortBarGraph(targetId){let target=document.getElementById(targetId);if(null===target)return;let isSorting=!0;for(;isSorting;){isSorting=!1;for(let i=0;i<target.rows.length-1;i++){if(parseInt(target.rows[i].dataset.percent)<parseInt(target.rows[i+1].dataset.percent)){target.rows[i].parentNode.insertBefore(target.rows[i+1],target.rows[i]),isSorting=!0;break}}}}set(wrapperId,tableId,responses,responded,questionType,graphId,rebuild){if(void 0!==responses){if(0===responses.length)return Quiz.show(Quiz.responded),void setText(Quiz.responded.find("h4"),"a_out_of_b_responded","jazzquiz",{a:0,b:this.totalStudents});switch(questionType){case"shortanswer":for(let i=0;i<responses.length;i++)responses[i].response=responses[i].response.trim();break;case"stack":for(let i=0;i<responses.length;i++)responses[i].response=responses[i].response.replace(/\s/g,"")}this.currentResponses=[],this.respondedCount=0;for(let i=0;i<responses.length;i++){let exists=!1,count=1;void 0!==responses[i].count&&(count=parseInt(responses[i].count)),this.respondedCount+=count;for(let j=0;j<this.currentResponses.length;j++)if(this.currentResponses[j].response===responses[i].response){this.currentResponses[j].count+=count,exists=!0;break}exists||this.currentResponses.push({response:responses[i].response,count:count,qtype:questionType})}if(0!==Quiz.responded.length&&void 0!==responded&&(Quiz.show(Quiz.responded),setText(Quiz.responded.find("h4"),"a_out_of_b_responded","jazzquiz",{a:responded,b:this.totalStudents})),!this.showResponses&&"reviewing"!==this.quiz.state)return Quiz.hide(Quiz.responseInfo),void Quiz.hide(Quiz.responses);if(null===document.getElementById(tableId)){const html='<table id="'+tableId+'" class="jazzquiz-responses-overview"></table>';Quiz.show($("#"+wrapperId).html(html))}this.createBarGraph(this.currentResponses,"current_response",tableId,graphId,rebuild),ResponseView.sortBarGraph(tableId)}}refresh(rebuild){Ajax.get("get_results",{},(data=>{this.quiz.question.hasVotes=data.has_votes,this.totalStudents=parseInt(data.total_students),this.set("jazzquiz_responses_container","current_responses_wrapper",data.responses,data.responded,data.question_type,"results",rebuild),data.merge_count>0?Quiz.show($("#jazzquiz_undo_merge")):Quiz.hide($("#jazzquiz_undo_merge"))}))}refreshVotes(){if(!this.showResponses&&"reviewing"!==this.quiz.state)return Quiz.hide(Quiz.responseInfo),void Quiz.hide(Quiz.responses);Ajax.get("get_vote_results",{},(data=>{const answers=data.answers,targetId="wrapper_vote_responses";let responses=[];this.respondedCount=0,this.totalStudents=parseInt(data.total_students);for(let i in answers)answers.hasOwnProperty(i)&&(responses.push({response:answers[i].attempt,count:answers[i].finalcount,qtype:answers[i].qtype,slot:answers[i].slot}),this.respondedCount+=parseInt(answers[i].finalcount));if(setText(Quiz.responded.find("h4"),"a_out_of_b_voted","jazzquiz",{a:this.respondedCount,b:this.totalStudents}),null===document.getElementById(targetId)){const html='<table id="'+targetId+'" class="jazzquiz-responses-overview"></table>';Quiz.show(Quiz.responses.html(html))}this.createBarGraph(responses,"vote_response",targetId,"vote",!1),ResponseView.sortBarGraph(targetId)}))}}class Instructor{constructor(quiz){this.quiz=quiz,this.responses=new ResponseView(quiz),this.isShowingCorrectAnswer=!1,this.totalQuestions=0,this.allowVote=!1,$(document).on("keyup",(event=>{27===event.keyCode&&Instructor.closeFullscreenView()})),$(document).on("click",(event=>{Instructor.closeQuestionListMenu(event,"improvise"),Instructor.closeQuestionListMenu(event,"jump")})),Instructor.addEvents({repoll:()=>this.repollQuestion(),vote:()=>this.runVoting(),improvise:()=>this.showQuestionListSetup("improvise"),jump:()=>this.showQuestionListSetup("jump"),next:()=>this.nextQuestion(),random:()=>this.randomQuestion(),end:()=>this.endQuestion(),fullscreen:()=>Instructor.showFullscreenView(),answer:()=>this.showCorrectAnswer(),responses:()=>this.responses.toggle(),exit:()=>this.closeSession(),quit:()=>this.closeSession(),startquiz:()=>this.startQuiz()}),Instructor.addHotkeys({t:"responses",r:"repoll",a:"answer",e:"end",j:"jump",i:"improvise",v:"vote",n:"next",m:"random",f:"fullscreen"})}static addHotkeys(keys){for(let key in keys)keys.hasOwnProperty(key)&&(keys[key]={action:keys[key],repeat:!1},$(document).on("keydown",(event=>{if(keys[key].repeat||event.ctrlKey)return;if(String.fromCharCode(event.which).toLowerCase()!==key)return;let focusedTag=$(":focus").prop("tagName");if(void 0!==focusedTag&&(focusedTag=focusedTag.toLowerCase(),"input"===focusedTag||"textarea"===focusedTag))return;event.preventDefault(),keys[key].repeat=!0;let $control=Instructor.control(keys[key].action);$control.length&&!$control.prop("disabled")&&$control.click()})),$(document).on("keyup",(event=>{String.fromCharCode(event.which).toLowerCase()===key&&(keys[key].repeat=!1)})))}static addEvents(events){for(let key in events)events.hasOwnProperty(key)&&$(document).on("click","#jazzquiz_control_"+key,(()=>{Instructor.enableControls([]),events[key]()}))}static get controls(){return $("#jazzquiz_controls_box")}static get controlButtons(){return Instructor.controls.find(".quiz-control-buttons")}static control(key){return $("#jazzquiz_control_"+key)}static get side(){return $("#jazzquiz_side_container")}static get correctAnswer(){return $("#jazzquiz_correct_answer_container")}static get isMerging(){return 0!==$(".merge-from").length}onNotRunning(data){this.responses.totalStudents=data.student_count,Quiz.hide(Instructor.side),setText(Quiz.info,"instructions_for_instructor"),Instructor.enableControls([]),Quiz.hide(Instructor.controlButtons);let $studentsJoined=Instructor.control("startquiz").next();1===data.student_count?setText($studentsJoined,"one_student_has_joined"):data.student_count>1?setText($studentsJoined,"x_students_have_joined","jazzquiz",data.student_count):setText($studentsJoined,"no_students_have_joined"),Quiz.show(Instructor.control("startquiz").parent())}onPreparing(data){Quiz.hide(Instructor.side),setText(Quiz.info,"instructions_for_instructor");let enabledButtons=["improvise","jump","random","fullscreen","quit"];data.slot<this.totalQuestions&&enabledButtons.push("next"),Instructor.enableControls(enabledButtons)}onRunning(data){if(this.responses.showResponses||this.responses.hide(),Quiz.show(Instructor.side),Instructor.enableControls(["end","responses","fullscreen"]),this.quiz.question.questionTime=data.questiontime,this.quiz.question.isRunning)data.questionTime>0&&data.delay<-data.questiontime&&this.endQuestion(),this.responses.refresh(!Instructor.isMerging);else{this.quiz.question.startCountdown(data.questiontime,data.delay)&&(this.quiz.question.isRunning=!0)}}onReviewing(data){Quiz.show(Instructor.side);let enabledButtons=["answer","repoll","fullscreen","improvise","jump","random","quit"];this.allowVote&&enabledButtons.push("vote"),data.slot<this.totalQuestions&&enabledButtons.push("next"),Instructor.enableControls(enabledButtons),Question.isLoaded()||this.quiz.question.refresh(),this.quiz.isNewState&&this.responses.show(),this.quiz.question.isRunning=!1}onSessionClosed(data){Quiz.hide(Instructor.side),Quiz.hide(Instructor.correctAnswer),Instructor.enableControls([]),this.responses.clear(),this.quiz.question.isRunning=!1}onVoting(data){this.responses.showResponses||this.responses.hide(),Quiz.show(Instructor.side),Instructor.enableControls(["quit","fullscreen","answer","responses","end"]),this.responses.refreshVotes()}onStateChange(state){$("#region-main").find("ul.nav.nav-tabs").css("display","none"),$("#region-main-settings-menu").css("display","none"),$(".region_main_settings_menu_proxy").css("display","none"),Quiz.show(Instructor.controlButtons),Quiz.hide(Instructor.control("startquiz").parent())}onQuestionRefreshed(data){this.allowVote=data.voteable}onTimerEnding(){this.endQuestion()}onTimerTick(timeLeft){setText(Question.timer,"x_seconds_left","jazzquiz",timeLeft)}startQuiz(){Quiz.hide(Instructor.control("startquiz").parent()),Ajax.post("start_quiz",{},(()=>$("#jazzquiz_controls").removeClass("btn-hide")))}endQuestion(){this.quiz.question.hideTimer(),Ajax.post("end_question",{},(()=>{"voting"===this.quiz.state?this.responses.showVotesUponReview=!0:(this.quiz.question.isRunning=!1,Instructor.enableControls([]))}))}showQuestionListSetup(name){let $controlButton=Instructor.control(name);$controlButton.hasClass("active")||Ajax.get("list_"+name+"_questions",{},(data=>{let self=this,$menu=$("#jazzquiz_"+name+"_menu");const menuMargin=$controlButton.offset().left-$controlButton.parent().offset().left;$menu.html("").addClass("active").css("margin-left",menuMargin+"px"),$controlButton.addClass("active");const questions=data.questions;for(let i in questions){if(!questions.hasOwnProperty(i))continue;let $questionButton=$('<button class="btn"></button>');Quiz.addMathjaxElement($questionButton,questions[i].name),$questionButton.data({time:questions[i].time,"question-id":questions[i].questionid,"jazzquiz-question-id":questions[i].jazzquizquestionid}),$questionButton.data("test",1),$questionButton.on("click",(function(){const questionId=$(this).data("question-id"),time=$(this).data("time"),jazzQuestionId=$(this).data("jazzquiz-question-id");self.jumpQuestion(questionId,time,jazzQuestionId),$menu.html("").removeClass("active"),$controlButton.removeClass("active")})),$menu.append($questionButton)}}))}static getSelectedAnswersForVote(){let result=[];return $(".selected-vote-option").each(((i,option)=>{result.push({text:option.dataset.response,count:option.dataset.count})})),result}runVoting(){const options=Instructor.getSelectedAnswersForVote(),data={questions:encodeURIComponent(JSON.stringify(options))};Ajax.post("run_voting",data,(()=>{}))}startQuestion(method,questionId,questionTime,jazzquizQuestionId){Quiz.hide(Quiz.info),this.responses.clear(),this.hideCorrectAnswer(),Ajax.post("start_question",{method:method,questionid:questionId,questiontime:questionTime,jazzquizquestionid:jazzquizQuestionId},(data=>this.quiz.question.startCountdown(data.questiontime,data.delay)))}jumpQuestion(questionId,questionTime,jazzquizQuestionId){this.startQuestion("jump",questionId,questionTime,jazzquizQuestionId)}repollQuestion(){this.startQuestion("repoll",0,0,0)}nextQuestion(){this.startQuestion("next",0,0,0)}randomQuestion(){this.startQuestion("random",0,0,0)}closeSession(){Quiz.hide($("#jazzquiz_undo_merge")),Quiz.hide(Question.box),Quiz.hide(Instructor.controls),setText(Quiz.info,"closing_session"),Ajax.post("close_session",{},(()=>window.location=location.href.split("&")[0]))}hideCorrectAnswer(){this.isShowingCorrectAnswer&&(Quiz.hide(Instructor.correctAnswer),Quiz.uncheck(Instructor.control("answer")),this.isShowingCorrectAnswer=!1)}showCorrectAnswer(){this.hideCorrectAnswer(),Ajax.get("get_right_response",{},(data=>{Quiz.show(Instructor.correctAnswer.html(data.right_answer)),Quiz.renderAllMathjax(),Quiz.check(Instructor.control("answer")),this.isShowingCorrectAnswer=!0}))}static enableControls(buttons){Instructor.controlButtons.children("button").each(((index,child)=>{const id=child.getAttribute("id").replace("jazzquiz_control_","");child.disabled=-1===buttons.indexOf(id)}))}static showFullscreenView(){Quiz.main.hasClass("jazzquiz-fullscreen")?Instructor.closeFullscreenView():(document.documentElement.style.overflowY="hidden",Quiz.main.addClass("jazzquiz-fullscreen"))}static closeFullscreenView(){document.documentElement.style.overflowY="auto",Quiz.main.removeClass("jazzquiz-fullscreen")}static closeQuestionListMenu(event,name){const menuId="#jazzquiz_"+name+"_menu";$(event.target).closest(menuId).length||($(menuId).html("").removeClass("active"),Instructor.control(name).removeClass("active"))}static addReportEventHandlers(){$(document).on("click","#report_overview_controls button",(function(){const action=$(this).data("action");"attendance"===action?($("#report_overview_responded").fadeIn(),$("#report_overview_responses").fadeOut()):"responses"===action&&($("#report_overview_responses").fadeIn(),$("#report_overview_responded").fadeOut())}))}}return{initialize:function(totalQuestions,reportView,slots){let quiz=new Quiz(Instructor);quiz.role.totalQuestions=totalQuestions,reportView?(Instructor.addReportEventHandlers(),quiz.role.responses.showResponses=!0,slots.forEach((slot=>{const wrapper="jazzquiz_wrapper_responses_"+slot.num,table="responses_wrapper_table_"+slot.num,graph="report_"+slot.num;quiz.role.responses.set(wrapper,table,slot.responses,void 0,slot.type,graph,!1)}))):quiz.poll(500)}}}));
+define("mod_jazzquiz/instructor",["jquery","mod_jazzquiz/core"],(function($,Jazz){const Quiz=Jazz.Quiz,Question=Jazz.Question,Ajax=Jazz.Ajax,setText=Jazz.setText;class ResponseView{constructor(quiz){this.quiz=quiz,this.currentResponses=[],this.showVotesUponReview=!1,this.respondedCount=0,this.showResponses=!1,this.totalStudents=0,$(document).on("click","#jazzquiz_undo_merge",(()=>this.undoMerge())),$(document).on("click",(event=>{event.target.classList.contains("bar")?this.startMerge(event.target.id):event.target.parentNode&&event.target.parentNode.classList.contains("bar")&&this.startMerge(event.target.parentNode.id)})),$(document).on("click","#review_show_normal_results",(()=>this.refresh(!1))),$(document).on("click","#review_show_vote_results",(()=>this.refreshVotes()))}clear(){Quiz.responses.html(""),Quiz.responseInfo.html("")}hide(){Quiz.uncheck(Instructor.control("responses")),Quiz.hide(Quiz.responses),Quiz.hide(Quiz.responseInfo)}show(){Quiz.check(Instructor.control("responses")),Quiz.show(Quiz.responses),Quiz.show(Quiz.responseInfo),this.showVotesUponReview?(this.refreshVotes(),this.showVotesUponReview=!1):this.refresh(!1)}toggle(){this.showResponses=!this.showResponses,this.showResponses?this.show():this.hide()}endMerge(){$(".merge-into").removeClass("merge-into"),$(".merge-from").removeClass("merge-from")}undoMerge(){Ajax.post("undo_merge",{},(()=>this.refresh(!0)))}merge(from,into){Ajax.post("merge_responses",{from:from,into:into},(()=>this.refresh(!1)))}startMerge(fromRowBarId){const $barCell=$("#"+fromRowBarId);let $row=$barCell.parent();if($row.hasClass("merge-from"))this.endMerge();else{if($row.hasClass("merge-into")){const $fromRow=$(".merge-from");return this.merge($fromRow.data("response"),$row.data("response")),void this.endMerge()}$row.addClass("merge-from"),$row.parent().parent().find("tr").each((function(){$(this).find("td")[1].id!==$barCell.attr("id")&&$(this).addClass("merge-into")}))}}createControls(name){if(this.quiz.question.hasVotes){if("reviewing"===this.quiz.state){let $showNormalResult=$("#review_show_normal_results"),$showVoteResult=$("#review_show_vote_results");Quiz.show(Quiz.responseInfo),"vote_response"===name?0===$showNormalResult.length&&(setText(Quiz.responseInfo.html('<h4 class="inline"></h4>').children("h4"),"showing_vote_results"),Quiz.responseInfo.append('<button id="review_show_normal_results" class="btn btn-primary"></button><br>'),setText($("#review_show_normal_results"),"click_to_show_original_results"),$showVoteResult.remove()):"current_response"===name&&0===$showVoteResult.length&&(setText(Quiz.responseInfo.html('<h4 class="inline"></h4>').children("h4"),"showing_original_results"),Quiz.responseInfo.append('<button id="review_show_vote_results" class="btn btn-primary"></button><br>'),setText($("#review_show_vote_results"),"click_to_show_vote_results"),$showNormalResult.remove())}}else Quiz.hide(Quiz.responseInfo)}addBarGraphRow(target,name,response,i,highestResponseCount){const percent=parseInt(response.count)/highestResponseCount*100;let rowIndex=-1,currentRowIndex=-1;for(let j=0;j<target.rows.length;j++)if(target.rows[j].dataset.response===response.response){rowIndex=parseInt(target.rows[j].dataset.rowIndex),currentRowIndex=j;break}if(-1===rowIndex){rowIndex=target.rows.length;let row=target.insertRow();row.dataset.responseIndex=i,row.dataset.response=response.response,row.dataset.percent=percent,row.dataset.rowIndex=rowIndex,row.dataset.count=response.count,row.classList.add("selected-vote-option"),percent<15&&row.classList.add("outside");const countHtml='<span id="'+name+"_count_"+rowIndex+'">'+response.count+"</span>";let responseCell=row.insertCell(0);responseCell.onclick=function(){$(this).parent().toggleClass("selected-vote-option")};let barCell=row.insertCell(1);barCell.classList.add("bar"),barCell.id=name+"_bar_"+rowIndex,barCell.innerHTML='<div style="width:'+percent+'%;">'+countHtml+"</div>";const latexId=name+"_latex_"+rowIndex;responseCell.innerHTML='<span id="'+latexId+'"></span>',Quiz.addMathjaxElement($("#"+latexId),response.response),"stack"===response.qtype&&Quiz.renderMaximaEquation(response.response,latexId)}else{let currentRow=target.rows[currentRowIndex];currentRow.dataset.rowIndex=rowIndex,currentRow.dataset.responseIndex=i,currentRow.dataset.percent=percent,currentRow.dataset.count=response.count;const containsOutside=currentRow.classList.contains("outside");percent>15&&containsOutside?currentRow.classList.remove("outside"):percent<15&&!containsOutside&&currentRow.classList.add("outside");let countElement=document.getElementById(name+"_count_"+rowIndex);null!==countElement&&(countElement.innerHTML=response.count);let barElement=document.getElementById(name+"_bar_"+rowIndex);null!==barElement&&(barElement.firstElementChild.style.width=percent+"%")}}createBarGraph(responses,name,targetId,graphId,rebuild){let target=document.getElementById(targetId);if(null===target)return;let highestResponseCount=0;for(let i=0;i<responses.length;i++){let count=parseInt(responses[i].count);count>highestResponseCount&&(highestResponseCount=count)}rebuild&&(target.innerHTML="");for(let i=0;i<target.rows.length;i++){let prune=!0;for(let j=0;j<responses.length;j++)if(target.rows[i].dataset.response===responses[j].response){prune=!1;break}prune&&(target.deleteRow(i),i--)}this.createControls(name),name+=graphId;for(let i=0;i<responses.length;i++)this.addBarGraphRow(target,name,responses[i],i,highestResponseCount)}static sortBarGraph(targetId){let target=document.getElementById(targetId);if(null===target)return;let isSorting=!0;for(;isSorting;){isSorting=!1;for(let i=0;i<target.rows.length-1;i++){if(parseInt(target.rows[i].dataset.percent)<parseInt(target.rows[i+1].dataset.percent)){target.rows[i].parentNode.insertBefore(target.rows[i+1],target.rows[i]),isSorting=!0;break}}}}set(wrapperId,tableId,responses,responded,questionType,graphId,rebuild){if(void 0!==responses){if(0===responses.length)return Quiz.show(Quiz.responded),void setText(Quiz.responded.find("h4"),"a_out_of_b_responded","jazzquiz",{a:0,b:this.totalStudents});switch(questionType){case"shortanswer":for(let i=0;i<responses.length;i++)responses[i].response=responses[i].response.trim();break;case"stack":for(let i=0;i<responses.length;i++)responses[i].response=responses[i].response.replace(/\s/g,"")}this.currentResponses=[],this.respondedCount=0;for(let i=0;i<responses.length;i++){let exists=!1,count=1;void 0!==responses[i].count&&(count=parseInt(responses[i].count)),this.respondedCount+=count;for(let j=0;j<this.currentResponses.length;j++)if(this.currentResponses[j].response===responses[i].response){this.currentResponses[j].count+=count,exists=!0;break}exists||this.currentResponses.push({response:responses[i].response,count:count,qtype:questionType})}if(0!==Quiz.responded.length&&void 0!==responded&&(Quiz.show(Quiz.responded),setText(Quiz.responded.find("h4"),"a_out_of_b_responded","jazzquiz",{a:responded,b:this.totalStudents})),!this.showResponses&&"reviewing"!==this.quiz.state)return Quiz.hide(Quiz.responseInfo),void Quiz.hide(Quiz.responses);if(null===document.getElementById(tableId)){const html='<table id="'+tableId+'" class="jazzquiz-responses-overview"></table>';Quiz.show($("#"+wrapperId).html(html))}this.createBarGraph(this.currentResponses,"current_response",tableId,graphId,rebuild),ResponseView.sortBarGraph(tableId)}}refresh(rebuild){Ajax.get("get_results",{},(data=>{this.quiz.question.hasVotes=data.has_votes,this.totalStudents=parseInt(data.total_students),this.set("jazzquiz_responses_container","current_responses_wrapper",data.responses,data.responded,data.question_type,"results",rebuild),data.merge_count>0?Quiz.show($("#jazzquiz_undo_merge")):Quiz.hide($("#jazzquiz_undo_merge"))}))}refreshVotes(){if(!this.showResponses&&"reviewing"!==this.quiz.state)return Quiz.hide(Quiz.responseInfo),void Quiz.hide(Quiz.responses);Ajax.get("get_vote_results",{},(data=>{const answers=data.answers,targetId="wrapper_vote_responses";let responses=[];this.respondedCount=0,this.totalStudents=parseInt(data.total_students);for(let i in answers)answers.hasOwnProperty(i)&&(responses.push({response:answers[i].attempt,count:answers[i].finalcount,qtype:answers[i].qtype,slot:answers[i].slot}),this.respondedCount+=parseInt(answers[i].finalcount));if(setText(Quiz.responded.find("h4"),"a_out_of_b_voted","jazzquiz",{a:this.respondedCount,b:this.totalStudents}),null===document.getElementById(targetId)){const html='<table id="'+targetId+'" class="jazzquiz-responses-overview"></table>';Quiz.show(Quiz.responses.html(html))}this.createBarGraph(responses,"vote_response",targetId,"vote",!1),ResponseView.sortBarGraph(targetId)}))}}class Instructor{constructor(quiz){this.quiz=quiz,this.responses=new ResponseView(quiz),this.isShowingCorrectAnswer=!1,this.totalQuestions=0,this.allowVote=!1,$(document).on("keyup",(event=>{27===event.keyCode&&Instructor.closeFullscreenView()})),$(document).on("click",(event=>{Instructor.closeQuestionListMenu(event,"improvise"),Instructor.closeQuestionListMenu(event,"jump")})),Instructor.addEvents({repoll:()=>this.repollQuestion(),vote:()=>this.runVoting(),improvise:()=>this.showQuestionListSetup("improvise"),jump:()=>this.showQuestionListSetup("jump"),next:()=>this.nextQuestion(),random:()=>this.randomQuestion(),end:()=>this.endQuestion(),fullscreen:()=>Instructor.showFullscreenView(),answer:()=>this.showCorrectAnswer(),responses:()=>this.responses.toggle(),exit:()=>this.closeSession(),quit:()=>this.closeSession(),startquiz:()=>this.startQuiz()}),Instructor.addHotkeys({t:"responses",r:"repoll",a:"answer",e:"end",j:"jump",i:"improvise",v:"vote",n:"next",m:"random",f:"fullscreen"})}static addHotkeys(keys){for(let key in keys)keys.hasOwnProperty(key)&&(keys[key]={action:keys[key],repeat:!1},$(document).on("keydown",(event=>{if(keys[key].repeat||event.ctrlKey)return;if(String.fromCharCode(event.which).toLowerCase()!==key)return;let focusedTag=$(":focus").prop("tagName");if(void 0!==focusedTag&&(focusedTag=focusedTag.toLowerCase(),"input"===focusedTag||"textarea"===focusedTag))return;event.preventDefault(),keys[key].repeat=!0;let $control=Instructor.control(keys[key].action);$control.length&&!$control.prop("disabled")&&$control.click()})),$(document).on("keyup",(event=>{String.fromCharCode(event.which).toLowerCase()===key&&(keys[key].repeat=!1)})))}static addEvents(events){for(let key in events)events.hasOwnProperty(key)&&$(document).on("click","#jazzquiz_control_"+key,(()=>{Instructor.enableControls([]),events[key]()}))}static get controls(){return $("#jazzquiz_controls_box")}static get controlButtons(){return Instructor.controls.find(".quiz-control-buttons")}static control(key){return $("#jazzquiz_control_"+key)}static get side(){return $("#jazzquiz_side_container")}static get correctAnswer(){return $("#jazzquiz_correct_answer_container")}static get isMerging(){return 0!==$(".merge-from").length}onNotRunning(data){this.responses.totalStudents=data.student_count,Quiz.hide(Instructor.side),setText(Quiz.info,"instructions_for_instructor"),Instructor.enableControls([]),Quiz.hide(Instructor.controlButtons);let $studentsJoined=Instructor.control("startquiz").next();1===data.student_count?setText($studentsJoined,"one_student_has_joined"):data.student_count>1?setText($studentsJoined,"x_students_have_joined","jazzquiz",data.student_count):setText($studentsJoined,"no_students_have_joined"),Quiz.show(Instructor.control("startquiz").parent())}onPreparing(data){Quiz.hide(Instructor.side),setText(Quiz.info,"instructions_for_instructor");let enabledButtons=["improvise","jump","random","fullscreen","quit"];data.slot<this.totalQuestions&&enabledButtons.push("next"),Instructor.enableControls(enabledButtons)}onRunning(data){if(this.responses.showResponses||this.responses.hide(),Quiz.show(Instructor.side),Instructor.enableControls(["end","responses","fullscreen"]),this.quiz.question.questionTime=data.questiontime,this.quiz.question.isRunning)data.questionTime>0&&data.delay<-data.questiontime&&this.endQuestion(),this.responses.refresh(!Instructor.isMerging);else{this.quiz.question.startCountdown(data.questiontime,data.delay)&&(this.quiz.question.isRunning=!0)}}onReviewing(data){Quiz.show(Instructor.side);let enabledButtons=["answer","repoll","fullscreen","improvise","jump","random","quit"];this.allowVote&&enabledButtons.push("vote"),data.slot<this.totalQuestions&&enabledButtons.push("next"),Instructor.enableControls(enabledButtons),Question.isLoaded()||this.quiz.question.refresh(),this.quiz.isNewState&&this.responses.show(),this.quiz.question.isRunning=!1}onSessionClosed(){Quiz.hide(Instructor.side),Quiz.hide(Instructor.correctAnswer),Instructor.enableControls([]),this.responses.clear(),this.quiz.question.isRunning=!1}onVoting(){this.responses.showResponses||this.responses.hide(),Quiz.show(Instructor.side),Instructor.enableControls(["quit","fullscreen","answer","responses","end"]),this.responses.refreshVotes()}onStateChange(){$("#region-main").find("ul.nav.nav-tabs").css("display","none"),$("#region-main-settings-menu").css("display","none"),$(".region_main_settings_menu_proxy").css("display","none"),Quiz.show(Instructor.controlButtons),Quiz.hide(Instructor.control("startquiz").parent())}onQuestionRefreshed(data){this.allowVote=data.voteable}onTimerEnding(){this.endQuestion()}onTimerTick(timeLeft){setText(Question.timer,"x_seconds_left","jazzquiz",timeLeft)}startQuiz(){Quiz.hide(Instructor.control("startquiz").parent()),Ajax.post("start_quiz",{},(()=>$("#jazzquiz_controls").removeClass("btn-hide")))}endQuestion(){this.quiz.question.hideTimer(),Ajax.post("end_question",{},(()=>{"voting"===this.quiz.state?this.responses.showVotesUponReview=!0:(this.quiz.question.isRunning=!1,Instructor.enableControls([]))}))}showQuestionListSetup(name){let $controlButton=Instructor.control(name);$controlButton.hasClass("active")||Ajax.get("list_"+name+"_questions",{},(data=>{let self=this,$menu=$("#jazzquiz_"+name+"_menu");const menuMargin=$controlButton.offset().left-$controlButton.parent().offset().left;$menu.html("").addClass("active").css("margin-left",menuMargin+"px"),$controlButton.addClass("active");const questions=data.questions;for(let i in questions){if(!questions.hasOwnProperty(i))continue;let $questionButton=$('<button class="btn"></button>');Quiz.addMathjaxElement($questionButton,questions[i].name),$questionButton.data({time:questions[i].time,"question-id":questions[i].questionid,"jazzquiz-question-id":questions[i].jazzquizquestionid}),$questionButton.data("test",1),$questionButton.on("click",(function(){const questionId=$(this).data("question-id"),time=$(this).data("time"),jazzQuestionId=$(this).data("jazzquiz-question-id");self.jumpQuestion(questionId,time,jazzQuestionId),$menu.html("").removeClass("active"),$controlButton.removeClass("active")})),$menu.append($questionButton)}}))}static getSelectedAnswersForVote(){let result=[];return $(".selected-vote-option").each(((i,option)=>{result.push({text:option.dataset.response,count:option.dataset.count})})),result}runVoting(){const options=Instructor.getSelectedAnswersForVote(),data={questions:encodeURIComponent(JSON.stringify(options))};Ajax.post("run_voting",data)}startQuestion(method,questionId,questionTime,jazzquizQuestionId){Quiz.hide(Quiz.info),this.responses.clear(),this.hideCorrectAnswer(),Ajax.post("start_question",{method:method,questionid:questionId,questiontime:questionTime,jazzquizquestionid:jazzquizQuestionId},(data=>this.quiz.question.startCountdown(data.questiontime,data.delay)))}jumpQuestion(questionId,questionTime,jazzquizQuestionId){this.startQuestion("jump",questionId,questionTime,jazzquizQuestionId)}repollQuestion(){this.startQuestion("repoll",0,0,0)}nextQuestion(){this.startQuestion("next",0,0,0)}randomQuestion(){this.startQuestion("random",0,0,0)}closeSession(){Quiz.hide($("#jazzquiz_undo_merge")),Quiz.hide(Question.box),Quiz.hide(Instructor.controls),setText(Quiz.info,"closing_session"),Ajax.post("close_session",{},(()=>window.location=location.href.split("&")[0]))}hideCorrectAnswer(){this.isShowingCorrectAnswer&&(Quiz.hide(Instructor.correctAnswer),Quiz.uncheck(Instructor.control("answer")),this.isShowingCorrectAnswer=!1)}showCorrectAnswer(){this.hideCorrectAnswer(),Ajax.get("get_right_response",{},(data=>{Quiz.show(Instructor.correctAnswer.html(data.right_answer)),Quiz.renderAllMathjax(),Quiz.check(Instructor.control("answer")),this.isShowingCorrectAnswer=!0}))}static enableControls(buttons){Instructor.controlButtons.children("button").each(((index,child)=>{const id=child.getAttribute("id").replace("jazzquiz_control_","");child.disabled=-1===buttons.indexOf(id)}))}static showFullscreenView(){Quiz.main.hasClass("jazzquiz-fullscreen")?Instructor.closeFullscreenView():(document.documentElement.style.overflowY="hidden",Quiz.main.addClass("jazzquiz-fullscreen"))}static closeFullscreenView(){document.documentElement.style.overflowY="auto",Quiz.main.removeClass("jazzquiz-fullscreen")}static closeQuestionListMenu(event,name){const menuId="#jazzquiz_"+name+"_menu";$(event.target).closest(menuId).length||($(menuId).html("").removeClass("active"),Instructor.control(name).removeClass("active"))}static addReportEventHandlers(){$(document).on("click","#report_overview_controls button",(function(){const action=$(this).data("action");"attendance"===action?($("#report_overview_responded").fadeIn(),$("#report_overview_responses").fadeOut()):"responses"===action&&($("#report_overview_responses").fadeIn(),$("#report_overview_responded").fadeOut())}))}}return{initialize:function(totalQuestions,reportView,slots){let quiz=new Quiz(Instructor);quiz.role.totalQuestions=totalQuestions,reportView?(Instructor.addReportEventHandlers(),quiz.role.responses.showResponses=!0,slots.forEach((slot=>{const wrapper="jazzquiz_wrapper_responses_"+slot.num,table="responses_wrapper_table_"+slot.num,graph="report_"+slot.num;quiz.role.responses.set(wrapper,table,slot.responses,void 0,slot.type,graph,!1)}))):quiz.poll(500)}}}));
 
 //# sourceMappingURL=instructor.min.js.map
\ No newline at end of file
diff --git a/amd/build/instructor.min.js.map b/amd/build/instructor.min.js.map
index 697f263..5481f45 100644
--- a/amd/build/instructor.min.js.map
+++ b/amd/build/instructor.min.js.map
@@ -1 +1 @@
-{"version":3,"file":"instructor.min.js","sources":["../src/instructor.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * @package   mod_jazzquiz\n * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>\n * @copyright 2014 University of Wisconsin - Madison\n * @copyright 2018 NTNU\n * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\ndefine(['jquery', 'mod_jazzquiz/core'], function ($, Jazz) {\n\n    const Quiz = Jazz.Quiz;\n    const Question = Jazz.Question;\n    const Ajax = Jazz.Ajax;\n    const setText = Jazz.setText;\n\n    class ResponseView {\n\n        /**\n         * @param {Quiz} quiz\n         */\n        constructor(quiz) {\n            this.quiz = quiz;\n            this.currentResponses = [];\n            this.showVotesUponReview = false;\n            this.respondedCount = 0;\n            this.showResponses = false;\n            this.totalStudents = 0;\n            $(document).on('click', '#jazzquiz_undo_merge', () => this.undoMerge());\n            $(document).on('click', event => {\n                // Clicking a row to merge.\n                if (event.target.classList.contains('bar')) {\n                    this.startMerge(event.target.id);\n                } else if (event.target.parentNode && event.target.parentNode.classList.contains('bar')) {\n                    this.startMerge(event.target.parentNode.id);\n                }\n            });\n            $(document).on('click', '#review_show_normal_results', () => this.refresh(false));\n            $(document).on('click', '#review_show_vote_results', () => this.refreshVotes());\n        }\n\n        /**\n         * Clear, but not hide responses.\n         */\n        clear() {\n            Quiz.responses.html('');\n            Quiz.responseInfo.html('');\n        }\n\n        /**\n         * Hides the responses\n         */\n        hide() {\n            Quiz.uncheck(Instructor.control('responses'));\n            Quiz.hide(Quiz.responses);\n            Quiz.hide(Quiz.responseInfo);\n        }\n\n        /**\n         * Shows the responses\n         */\n        show() {\n            Quiz.check(Instructor.control('responses'));\n            Quiz.show(Quiz.responses);\n            Quiz.show(Quiz.responseInfo);\n            if (this.showVotesUponReview) {\n                this.refreshVotes();\n                this.showVotesUponReview = false;\n            } else {\n                this.refresh(false);\n            }\n        }\n\n        /**\n         * Toggle whether to show or hide the responses\n         */\n        toggle() {\n            this.showResponses = !this.showResponses;\n            if (this.showResponses) {\n                this.show();\n            } else {\n                this.hide();\n            }\n        }\n\n        /**\n         * End the response merge.\n         */\n        endMerge() {\n            $('.merge-into').removeClass('merge-into');\n            $('.merge-from').removeClass('merge-from');\n        }\n\n        /**\n         * Undo the last response merge.\n         */\n        undoMerge() {\n            Ajax.post('undo_merge', {}, () => this.refresh(true));\n        }\n\n        /**\n         * Merges responses based on response string.\n         * @param {string} from\n         * @param {string} into\n         */\n        merge(from, into) {\n            Ajax.post('merge_responses', {from: from, into: into}, () => this.refresh(false));\n        }\n\n        /**\n         * Start a merge between two responses.\n         * @param {string} fromRowBarId\n         */\n        startMerge(fromRowBarId) {\n            const $barCell = $('#' + fromRowBarId);\n            let $row = $barCell.parent();\n            if ($row.hasClass('merge-from')) {\n                this.endMerge();\n                return;\n            }\n            if ($row.hasClass('merge-into')) {\n                const $fromRow = $('.merge-from');\n                this.merge($fromRow.data('response'), $row.data('response'));\n                this.endMerge();\n                return;\n            }\n            $row.addClass('merge-from');\n            let $table = $row.parent().parent();\n            $table.find('tr').each(function () {\n                const $cells = $(this).find('td');\n                if ($cells[1].id !== $barCell.attr('id')) {\n                    $(this).addClass('merge-into');\n                }\n            });\n        }\n\n        /**\n         * Create controls to toggle between the responses of the actual question and the vote that followed.\n         * @param {string} name Can be either 'vote_response' or 'current_response'\n         */\n        createControls(name) {\n            if (!this.quiz.question.hasVotes) {\n                Quiz.hide(Quiz.responseInfo);\n                return;\n            }\n            // Add button for instructor to change what to review.\n            if (this.quiz.state === 'reviewing') {\n                let $showNormalResult = $('#review_show_normal_results');\n                let $showVoteResult = $('#review_show_vote_results');\n                Quiz.show(Quiz.responseInfo);\n                if (name === 'vote_response') {\n                    if ($showNormalResult.length === 0) {\n                        setText(Quiz.responseInfo.html('<h4 class=\"inline\"></h4>').children('h4'), 'showing_vote_results');\n                        Quiz.responseInfo.append('<button id=\"review_show_normal_results\" class=\"btn btn-primary\"></button><br>');\n                        setText($('#review_show_normal_results'), 'click_to_show_original_results');\n                        $showVoteResult.remove();\n                    }\n                } else if (name === 'current_response') {\n                    if ($showVoteResult.length === 0) {\n                        setText(Quiz.responseInfo.html('<h4 class=\"inline\"></h4>').children('h4'), 'showing_original_results');\n                        Quiz.responseInfo.append('<button id=\"review_show_vote_results\" class=\"btn btn-primary\"></button><br>');\n                        setText($('#review_show_vote_results'), 'click_to_show_vote_results');\n                        $showNormalResult.remove();\n                    }\n                }\n            }\n        }\n\n        /**\n         * Create a new and unsorted response bar graph.\n         * @param {Array.<Object>} responses\n         * @param {string} name\n         * @param {string} targetId\n         * @param {string} graphId\n         * @param {boolean} rebuild If the table should be completely rebuilt or not\n         */\n        createBarGraph(responses, name, targetId, graphId, rebuild) {\n            let target = document.getElementById(targetId);\n            if (target === null) {\n                return;\n            }\n            let total = 0;\n            let highestResponseCount = 0;\n            for (let i = 0; i < responses.length; i++) {\n                let count = parseInt(responses[i].count); // In case count is a string.\n                total += count;\n                if (count > highestResponseCount) {\n                    highestResponseCount = count;\n                }\n\n            }\n            if (total === 0) {\n                total = 1;\n            }\n\n            // Remove the rows if it should be rebuilt.\n            if (rebuild) {\n                target.innerHTML = '';\n            }\n\n            // Prune rows.\n            for (let i = 0; i < target.rows.length; i++) {\n                let prune = true;\n                for (let j = 0; j < responses.length; j++) {\n                    if (target.rows[i].dataset.response === responses[j].response) {\n                        prune = false;\n                        break;\n                    }\n                }\n                if (prune) {\n                    target.deleteRow(i);\n                    i--;\n                }\n            }\n\n            this.createControls(name);\n\n            name += graphId;\n\n            // Add rows.\n            for (let i = 0; i < responses.length; i++) {\n                //const percent = (parseInt(responses[i].count) / total) * 100;\n                const percent = (parseInt(responses[i].count) / highestResponseCount) * 100;\n\n                // Check if row with same response already exists.\n                let rowIndex = -1;\n                let currentRowIndex = -1;\n                for (let j = 0; j < target.rows.length; j++) {\n                    if (target.rows[j].dataset.response === responses[i].response) {\n                        rowIndex = target.rows[j].dataset.row_i;\n                        currentRowIndex = j;\n                        break;\n                    }\n                }\n\n                if (rowIndex === -1) {\n                    rowIndex = target.rows.length;\n                    let row = target.insertRow();\n                    row.dataset.response_i = i;\n                    row.dataset.response = responses[i].response;\n                    row.dataset.percent = percent;\n                    row.dataset.row_i = rowIndex;\n                    row.dataset.count = responses[i].count;\n                    row.classList.add('selected-vote-option');\n                    if (percent < 15) {\n                        row.classList.add('outside');\n                    }\n\n                    const countHtml = '<span id=\"' + name + '_count_' + rowIndex + '\">' + responses[i].count + '</span>';\n                    let responseCell = row.insertCell(0);\n                    responseCell.onclick = function () {\n                        $(this).parent().toggleClass('selected-vote-option');\n                    };\n\n                    let barCell = row.insertCell(1);\n                    barCell.classList.add('bar');\n                    barCell.id = name + '_bar_' + rowIndex;\n                    barCell.innerHTML = '<div style=\"width:' + percent + '%;\">' + countHtml + '</div>';\n\n                    const latexId = name + '_latex_' + rowIndex;\n                    responseCell.innerHTML = '<span id=\"' + latexId + '\"></span>';\n                    Quiz.addMathjaxElement($('#' + latexId), responses[i].response);\n                    if (responses[i].qtype === 'stack') {\n                        Quiz.renderMaximaEquation(responses[i].response, latexId);\n                    }\n                } else {\n                    let currentRow = target.rows[currentRowIndex];\n                    currentRow.dataset.row_i = rowIndex;\n                    currentRow.dataset.response_i = i;\n                    currentRow.dataset.percent = percent;\n                    currentRow.dataset.count = responses[i].count;\n                    const containsOutside = currentRow.classList.contains('outside');\n                    if (percent > 15 && containsOutside) {\n                        currentRow.classList.remove('outside');\n                    } else if (percent < 15 && !containsOutside) {\n                        currentRow.classList.add('outside');\n                    }\n                    let countElement = document.getElementById(name + '_count_' + rowIndex);\n                    if (countElement !== null) {\n                        countElement.innerHTML = responses[i].count;\n                    }\n                    let barElement = document.getElementById(name + '_bar_' + rowIndex);\n                    if (barElement !== null) {\n                        barElement.firstElementChild.style.width = percent + '%';\n                    }\n                }\n            }\n        };\n\n        /**\n         * Sort the responses in the graph by how many had the same response.\n         * @param {string} targetId\n         */\n        static sortBarGraph(targetId) {\n            let target = document.getElementById(targetId);\n            if (target === null) {\n                return;\n            }\n            let isSorting = true;\n            while (isSorting) {\n                isSorting = false;\n                for (let i = 0; i < (target.rows.length - 1); i++) {\n                    const current = parseInt(target.rows[i].dataset.percent);\n                    const next = parseInt(target.rows[i + 1].dataset.percent);\n                    if (current < next) {\n                        target.rows[i].parentNode.insertBefore(target.rows[i + 1], target.rows[i]);\n                        isSorting = true;\n                        break;\n                    }\n                }\n            }\n        }\n\n        /**\n         * Create and sort a bar graph based on the responses passed.\n         * @param {string} wrapperId\n         * @param {string} tableId\n         * @param {Array.<Object>} responses\n         * @param {number|undefined} responded How many students responded to the question\n         * @param {string} questionType\n         * @param {string} graphId\n         * @param {boolean} rebuild If the graph should be rebuilt or not.\n         */\n        set(wrapperId, tableId, responses, responded, questionType, graphId, rebuild) {\n            if (responses === undefined) {\n                return;\n            }\n\n            // Check if any responses to show.\n            if (responses.length === 0) {\n                Quiz.show(Quiz.responded);\n                setText(Quiz.responded.find('h4'), 'a_out_of_b_responded', 'jazzquiz', {\n                    a: 0,\n                    b: this.totalStudents\n                });\n                return;\n            }\n\n            // Question type specific.\n            switch (questionType) {\n                case 'shortanswer':\n                    for (let i = 0; i < responses.length; i++) {\n                        responses[i].response = responses[i].response.trim();\n                    }\n                    break;\n                case 'stack':\n                    // Remove all spaces from responses.\n                    for (let i = 0; i < responses.length; i++) {\n                        responses[i].response = responses[i].response.replace(/\\s/g, '');\n                    }\n                    break;\n                default:\n                    break;\n            }\n\n            // Update data.\n            this.currentResponses = [];\n            this.respondedCount = 0;\n            for (let i = 0; i < responses.length; i++) {\n                let exists = false;\n                let count = 1;\n                if (responses[i].count !== undefined) {\n                    count = parseInt(responses[i].count);\n                }\n                this.respondedCount += count;\n                // Check if response is a duplicate.\n                for (let j = 0; j < this.currentResponses.length; j++) {\n                    if (this.currentResponses[j].response === responses[i].response) {\n                        this.currentResponses[j].count += count;\n                        exists = true;\n                        break;\n                    }\n                }\n                // Add element if not a duplicate.\n                if (!exists) {\n                    this.currentResponses.push({\n                        response: responses[i].response,\n                        count: count,\n                        qtype: questionType\n                    });\n                }\n            }\n\n            // Update responded container.\n            if (Quiz.responded.length !== 0 && responded !== undefined) {\n                Quiz.show(Quiz.responded);\n                setText(Quiz.responded.find('h4'), 'a_out_of_b_responded', 'jazzquiz', {\n                    a: responded,\n                    b: this.totalStudents\n                });\n            }\n\n            // Should we show the responses?\n            if (!this.showResponses && this.quiz.state !== 'reviewing') {\n                Quiz.hide(Quiz.responseInfo);\n                Quiz.hide(Quiz.responses);\n                return;\n            }\n\n            if (document.getElementById(tableId) === null) {\n                const html = '<table id=\"' + tableId + '\" class=\"jazzquiz-responses-overview\"></table>';\n                Quiz.show($('#' + wrapperId).html(html));\n            }\n            this.createBarGraph(this.currentResponses, 'current_response', tableId, graphId, rebuild);\n            ResponseView.sortBarGraph(tableId);\n        }\n\n        /**\n         * Fetch and show results for the ongoing or previous question.\n         * @param {boolean} rebuild If the response graph should be rebuilt or not.\n         */\n        refresh(rebuild) {\n            Ajax.get('get_results', {}, data => {\n                this.quiz.question.hasVotes = data.has_votes;\n                this.totalStudents = parseInt(data.total_students);\n\n                this.set('jazzquiz_responses_container', 'current_responses_wrapper',\n                    data.responses, data.responded, data.question_type, 'results', rebuild);\n\n                if (data.merge_count > 0) {\n                    Quiz.show($('#jazzquiz_undo_merge'));\n                } else {\n                    Quiz.hide($('#jazzquiz_undo_merge'));\n                }\n            });\n        }\n\n        /**\n         * refresh() equivalent for votes.\n         */\n        refreshVotes() {\n            // Should we show the results?\n            if (!this.showResponses && this.quiz.state !== 'reviewing') {\n                Quiz.hide(Quiz.responseInfo);\n                Quiz.hide(Quiz.responses);\n                return;\n            }\n            Ajax.get('get_vote_results', {}, data => {\n                const answers = data.answers;\n                const targetId = 'wrapper_vote_responses';\n                let responses = [];\n\n                this.respondedCount = 0;\n                this.totalStudents = parseInt(data.total_students);\n\n                for (let i in answers) {\n                    if (!answers.hasOwnProperty(i)) {\n                        continue;\n                    }\n                    responses.push({\n                        response: answers[i].attempt,\n                        count: answers[i].finalcount,\n                        qtype: answers[i].qtype,\n                        slot: answers[i].slot\n                    });\n                    this.respondedCount += parseInt(answers[i].finalcount);\n                }\n\n                setText(Quiz.responded.find('h4'), 'a_out_of_b_voted', 'jazzquiz', {\n                    a: this.respondedCount,\n                    b: this.totalStudents\n                });\n\n                if (document.getElementById(targetId) === null) {\n                    const html = '<table id=\"' + targetId + '\" class=\"jazzquiz-responses-overview\"></table>';\n                    Quiz.show(Quiz.responses.html(html));\n                }\n\n                this.createBarGraph(responses, 'vote_response', targetId, 'vote', false);\n                ResponseView.sortBarGraph(targetId);\n            });\n        }\n\n    }\n\n    class Instructor {\n\n        /**\n         * @param {Quiz} quiz\n         */\n        constructor(quiz) {\n            this.quiz = quiz;\n            this.responses = new ResponseView(quiz);\n            this.isShowingCorrectAnswer = false;\n            this.totalQuestions = 0;\n            this.allowVote = false;\n\n            $(document).on('keyup', event => {\n                if (event.keyCode === 27) { // Escape key.\n                    Instructor.closeFullscreenView();\n                }\n            });\n\n            $(document).on('click', event => {\n                Instructor.closeQuestionListMenu(event, 'improvise');\n                Instructor.closeQuestionListMenu(event, 'jump');\n            });\n\n            Instructor.addEvents({\n                'repoll': () => this.repollQuestion(),\n                'vote': () => this.runVoting(),\n                'improvise': () => this.showQuestionListSetup('improvise'),\n                'jump': () => this.showQuestionListSetup('jump'),\n                'next': () => this.nextQuestion(),\n                'random': () => this.randomQuestion(),\n                'end': () => this.endQuestion(),\n                'fullscreen': () => Instructor.showFullscreenView(),\n                'answer': () => this.showCorrectAnswer(),\n                'responses': () => this.responses.toggle(),\n                'exit': () => this.closeSession(),\n                'quit': () => this.closeSession(),\n                'startquiz': () => this.startQuiz()\n            });\n\n            Instructor.addHotkeys({\n                't': 'responses',\n                'r': 'repoll',\n                'a': 'answer',\n                'e': 'end',\n                'j': 'jump',\n                'i': 'improvise',\n                'v': 'vote',\n                'n': 'next',\n                'm': 'random',\n                'f': 'fullscreen'\n            });\n        }\n\n        static addHotkeys(keys) {\n            for (let key in keys) {\n                if (keys.hasOwnProperty(key)) {\n                    keys[key] = {\n                        action: keys[key],\n                        repeat: false // TODO: Maybe event.repeat becomes more standard?\n                    };\n                    $(document).on('keydown', event => {\n                        if (keys[key].repeat || event.ctrlKey) {\n                            return;\n                        }\n                        if (String.fromCharCode(event.which).toLowerCase() !== key) {\n                            return;\n                        }\n                        let focusedTag = $(':focus').prop('tagName');\n                        if (focusedTag !== undefined) {\n                            focusedTag = focusedTag.toLowerCase();\n                            if (focusedTag === 'input' || focusedTag === 'textarea') {\n                                return;\n                            }\n                        }\n                        event.preventDefault();\n                        keys[key].repeat = true;\n                        let $control = Instructor.control(keys[key].action);\n                        if ($control.length && !$control.prop('disabled')) {\n                            $control.click();\n                        }\n                    });\n                    $(document).on('keyup', event => {\n                        if (String.fromCharCode(event.which).toLowerCase() === key) {\n                            keys[key].repeat = false;\n                        }\n                    });\n                }\n            }\n        }\n\n        static addEvents(events) {\n            for (let key in events) {\n                if (events.hasOwnProperty(key)) {\n                    $(document).on('click', '#jazzquiz_control_' + key, () => {\n                        Instructor.enableControls([]);\n                        events[key]();\n                    });\n                }\n            }\n        }\n\n        static get controls() {\n            return $('#jazzquiz_controls_box');\n        }\n\n        static get controlButtons() {\n            return Instructor.controls.find('.quiz-control-buttons');\n        }\n\n        static control(key) {\n            return $('#jazzquiz_control_' + key);\n        }\n\n        static get side() {\n            return $('#jazzquiz_side_container');\n        }\n\n        static get correctAnswer() {\n            return $('#jazzquiz_correct_answer_container');\n        }\n\n        static get isMerging() {\n            return $('.merge-from').length !== 0;\n        }\n\n        onNotRunning(data) {\n            this.responses.totalStudents = data.student_count;\n            Quiz.hide(Instructor.side);\n            setText(Quiz.info, 'instructions_for_instructor');\n            Instructor.enableControls([]);\n            Quiz.hide(Instructor.controlButtons);\n            let $studentsJoined = Instructor.control('startquiz').next();\n            if (data.student_count === 1) {\n                setText($studentsJoined, 'one_student_has_joined');\n            } else if (data.student_count > 1) {\n                setText($studentsJoined, 'x_students_have_joined', 'jazzquiz', data.student_count);\n            } else {\n                setText($studentsJoined, 'no_students_have_joined');\n            }\n            Quiz.show(Instructor.control('startquiz').parent());\n        }\n\n        onPreparing(data) {\n            Quiz.hide(Instructor.side);\n            setText(Quiz.info, 'instructions_for_instructor');\n            let enabledButtons = ['improvise', 'jump', 'random', 'fullscreen', 'quit'];\n            if (data.slot < this.totalQuestions) {\n                enabledButtons.push('next');\n            }\n            Instructor.enableControls(enabledButtons);\n        }\n\n        onRunning(data) {\n            if (!this.responses.showResponses) {\n                this.responses.hide();\n            }\n            Quiz.show(Instructor.side);\n            Instructor.enableControls(['end', 'responses', 'fullscreen']);\n            this.quiz.question.questionTime = data.questiontime;\n            if (this.quiz.question.isRunning) {\n                // Check if the question has already ended.\n                // We need to do this because the state does not update unless an instructor is connected.\n                if (data.questionTime > 0 && data.delay < -data.questiontime) {\n                    this.endQuestion();\n                }\n                // Only rebuild results if we are not merging.\n                this.responses.refresh(!Instructor.isMerging);\n            } else {\n                const started = this.quiz.question.startCountdown(data.questiontime, data.delay);\n                if (started) {\n                    this.quiz.question.isRunning = true;\n                }\n            }\n        }\n\n        onReviewing(data) {\n            Quiz.show(Instructor.side);\n            let enabledButtons = ['answer', 'repoll', 'fullscreen', 'improvise', 'jump', 'random', 'quit'];\n            if (this.allowVote) {\n                enabledButtons.push('vote');\n            }\n            if (data.slot < this.totalQuestions) {\n                enabledButtons.push('next');\n            }\n            Instructor.enableControls(enabledButtons);\n\n            // In case page was refreshed, we should ensure the question is showing.\n            if (!Question.isLoaded()) {\n                this.quiz.question.refresh();\n            }\n\n            // For now, just always show responses while reviewing.\n            // In the future, there should be an additional toggle.\n            if (this.quiz.isNewState) {\n                this.responses.show();\n            }\n            // No longer in question.\n            this.quiz.question.isRunning = false;\n        }\n\n        onSessionClosed(data) {\n            Quiz.hide(Instructor.side);\n            Quiz.hide(Instructor.correctAnswer);\n            Instructor.enableControls([]);\n            this.responses.clear();\n            this.quiz.question.isRunning = false;\n        }\n\n        onVoting(data) {\n            if (!this.responses.showResponses) {\n                this.responses.hide();\n            }\n            Quiz.show(Instructor.side);\n            Instructor.enableControls(['quit', 'fullscreen', 'answer', 'responses', 'end']);\n            this.responses.refreshVotes();\n        }\n\n        onStateChange(state) {\n            $('#region-main').find('ul.nav.nav-tabs').css('display', 'none');\n            $('#region-main-settings-menu').css('display', 'none');\n            $('.region_main_settings_menu_proxy').css('display', 'none');\n            Quiz.show(Instructor.controlButtons);\n            Quiz.hide(Instructor.control('startquiz').parent());\n        }\n\n        onQuestionRefreshed(data) {\n            this.allowVote = data.voteable;\n        }\n\n        onTimerEnding() {\n            this.endQuestion();\n        }\n\n        onTimerTick(timeLeft) {\n            setText(Question.timer, 'x_seconds_left', 'jazzquiz', timeLeft);\n        }\n\n        /**\n         * Start the quiz. Does not start any questions.\n         */\n        startQuiz() {\n            Quiz.hide(Instructor.control('startquiz').parent());\n            Ajax.post('start_quiz', {}, () => $('#jazzquiz_controls').removeClass('btn-hide'));\n        }\n\n        /**\n         * End the currently ongoing question or vote.\n         */\n        endQuestion() {\n            this.quiz.question.hideTimer();\n            Ajax.post('end_question', {}, () => {\n                if (this.quiz.state === 'voting') {\n                    this.responses.showVotesUponReview = true;\n                } else {\n                    this.quiz.question.isRunning = false;\n                    Instructor.enableControls([]);\n                }\n            });\n        }\n\n        /**\n         * Show a question list dropdown.\n         * @param {string} name\n         */\n        showQuestionListSetup(name) {\n            let $controlButton = Instructor.control(name);\n            if ($controlButton.hasClass('active')) {\n                // It's already open. Let's not send another request.\n                return;\n            }\n            Ajax.get('list_' + name + '_questions', {}, data => {\n                let self = this;\n                let $menu = $('#jazzquiz_' + name + '_menu');\n                const menuMargin = $controlButton.offset().left - $controlButton.parent().offset().left;\n                $menu.html('').addClass('active').css('margin-left', menuMargin + 'px');\n                $controlButton.addClass('active');\n                const questions = data.questions;\n                for (let i in questions) {\n                    if (!questions.hasOwnProperty(i)) {\n                        continue;\n                    }\n                    let $questionButton = $('<button class=\"btn\"></button>');\n                    Quiz.addMathjaxElement($questionButton, questions[i].name);\n                    $questionButton.data({\n                        'time': questions[i].time,\n                        'question-id': questions[i].questionid,\n                        'jazzquiz-question-id': questions[i].jazzquizquestionid\n                    });\n                    $questionButton.data('test', 1);\n                    $questionButton.on('click', function () {\n                        const questionId = $(this).data('question-id');\n                        const time = $(this).data('time');\n                        const jazzQuestionId = $(this).data('jazzquiz-question-id');\n                        self.jumpQuestion(questionId, time, jazzQuestionId);\n                        $menu.html('').removeClass('active');\n                        $controlButton.removeClass('active');\n                    });\n                    $menu.append($questionButton);\n                }\n            });\n        }\n\n        /**\n         * Get the selected responses.\n         * @returns {Array.<Object>} Vote options\n         */\n        static getSelectedAnswersForVote() {\n            let result = [];\n            $('.selected-vote-option').each((i, option) => {\n                result.push({\n                    text: option.dataset.response,\n                    count: option.dataset.count\n                });\n            });\n            return result;\n        }\n\n        /**\n         * Start a vote with the responses that are currently selected.\n         */\n        runVoting() {\n            const options = Instructor.getSelectedAnswersForVote();\n            const data = {questions: encodeURIComponent(JSON.stringify(options))};\n            Ajax.post('run_voting', data, () => {});\n        }\n\n        /**\n         * Start a new question in this session.\n         * @param {string} method\n         * @param {number} questionId\n         * @param {number} questionTime\n         * @param {number} jazzquizQuestionId\n         */\n        startQuestion(method, questionId, questionTime, jazzquizQuestionId) {\n            Quiz.hide(Quiz.info);\n            this.responses.clear();\n       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\ No newline at end of file
+{"version":3,"file":"instructor.min.js","sources":["../src/instructor.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * @module    mod_jazzquiz\n * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>\n * @copyright 2014 University of Wisconsin - Madison\n * @copyright 2018 NTNU\n * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\ndefine(['jquery', 'mod_jazzquiz/core'], function($, Jazz) {\n\n    const Quiz = Jazz.Quiz;\n    const Question = Jazz.Question;\n    const Ajax = Jazz.Ajax;\n    const setText = Jazz.setText;\n\n    class ResponseView {\n\n        /**\n         * @param {Quiz} quiz\n         */\n        constructor(quiz) {\n            this.quiz = quiz;\n            this.currentResponses = [];\n            this.showVotesUponReview = false;\n            this.respondedCount = 0;\n            this.showResponses = false;\n            this.totalStudents = 0;\n            $(document).on('click', '#jazzquiz_undo_merge', () => this.undoMerge());\n            $(document).on('click', event => {\n                // Clicking a row to merge.\n                if (event.target.classList.contains('bar')) {\n                    this.startMerge(event.target.id);\n                } else if (event.target.parentNode && event.target.parentNode.classList.contains('bar')) {\n                    this.startMerge(event.target.parentNode.id);\n                }\n            });\n            $(document).on('click', '#review_show_normal_results', () => this.refresh(false));\n            $(document).on('click', '#review_show_vote_results', () => this.refreshVotes());\n        }\n\n        /**\n         * Clear, but not hide responses.\n         */\n        clear() {\n            Quiz.responses.html('');\n            Quiz.responseInfo.html('');\n        }\n\n        /**\n         * Hides the responses\n         */\n        hide() {\n            Quiz.uncheck(Instructor.control('responses'));\n            Quiz.hide(Quiz.responses);\n            Quiz.hide(Quiz.responseInfo);\n        }\n\n        /**\n         * Shows the responses\n         */\n        show() {\n            Quiz.check(Instructor.control('responses'));\n            Quiz.show(Quiz.responses);\n            Quiz.show(Quiz.responseInfo);\n            if (this.showVotesUponReview) {\n                this.refreshVotes();\n                this.showVotesUponReview = false;\n            } else {\n                this.refresh(false);\n            }\n        }\n\n        /**\n         * Toggle whether to show or hide the responses\n         */\n        toggle() {\n            this.showResponses = !this.showResponses;\n            if (this.showResponses) {\n                this.show();\n            } else {\n                this.hide();\n            }\n        }\n\n        /**\n         * End the response merge.\n         */\n        endMerge() {\n            $('.merge-into').removeClass('merge-into');\n            $('.merge-from').removeClass('merge-from');\n        }\n\n        /**\n         * Undo the last response merge.\n         */\n        undoMerge() {\n            Ajax.post('undo_merge', {}, () => this.refresh(true));\n        }\n\n        /**\n         * Merges responses based on response string.\n         * @param {string} from\n         * @param {string} into\n         */\n        merge(from, into) {\n            Ajax.post('merge_responses', {from: from, into: into}, () => this.refresh(false));\n        }\n\n        /**\n         * Start a merge between two responses.\n         * @param {string} fromRowBarId\n         */\n        startMerge(fromRowBarId) {\n            const $barCell = $('#' + fromRowBarId);\n            let $row = $barCell.parent();\n            if ($row.hasClass('merge-from')) {\n                this.endMerge();\n                return;\n            }\n            if ($row.hasClass('merge-into')) {\n                const $fromRow = $('.merge-from');\n                this.merge($fromRow.data('response'), $row.data('response'));\n                this.endMerge();\n                return;\n            }\n            $row.addClass('merge-from');\n            let $table = $row.parent().parent();\n            $table.find('tr').each(function() {\n                const $cells = $(this).find('td');\n                if ($cells[1].id !== $barCell.attr('id')) {\n                    $(this).addClass('merge-into');\n                }\n            });\n        }\n\n        /**\n         * Create controls to toggle between the responses of the actual question and the vote that followed.\n         * @param {string} name Can be either 'vote_response' or 'current_response'\n         */\n        createControls(name) {\n            if (!this.quiz.question.hasVotes) {\n                Quiz.hide(Quiz.responseInfo);\n                return;\n            }\n            // Add button for instructor to change what to review.\n            if (this.quiz.state === 'reviewing') {\n                let $showNormalResult = $('#review_show_normal_results');\n                let $showVoteResult = $('#review_show_vote_results');\n                Quiz.show(Quiz.responseInfo);\n                if (name === 'vote_response') {\n                    if ($showNormalResult.length === 0) {\n                        setText(Quiz.responseInfo.html('<h4 class=\"inline\"></h4>').children('h4'), 'showing_vote_results');\n                        Quiz.responseInfo.append('<button id=\"review_show_normal_results\" class=\"btn btn-primary\"></button><br>');\n                        setText($('#review_show_normal_results'), 'click_to_show_original_results');\n                        $showVoteResult.remove();\n                    }\n                } else if (name === 'current_response') {\n                    if ($showVoteResult.length === 0) {\n                        setText(Quiz.responseInfo.html('<h4 class=\"inline\"></h4>').children('h4'), 'showing_original_results');\n                        Quiz.responseInfo.append('<button id=\"review_show_vote_results\" class=\"btn btn-primary\"></button><br>');\n                        setText($('#review_show_vote_results'), 'click_to_show_vote_results');\n                        $showNormalResult.remove();\n                    }\n                }\n            }\n        }\n\n        addBarGraphRow(target, name, response, i, highestResponseCount) {\n            // Const percent = (parseInt(responses[i].count) / total) * 100;\n            const percent = (parseInt(response.count) / highestResponseCount) * 100;\n\n            // Check if row with same response already exists.\n            let rowIndex = -1;\n            let currentRowIndex = -1;\n            for (let j = 0; j < target.rows.length; j++) {\n                if (target.rows[j].dataset.response === response.response) {\n                    rowIndex = parseInt(target.rows[j].dataset.rowIndex);\n                    currentRowIndex = j;\n                    break;\n                }\n            }\n\n            if (rowIndex === -1) {\n                rowIndex = target.rows.length;\n                let row = target.insertRow();\n                row.dataset.responseIndex = i;\n                row.dataset.response = response.response;\n                row.dataset.percent = percent;\n                row.dataset.rowIndex = rowIndex;\n                row.dataset.count = response.count;\n                row.classList.add('selected-vote-option');\n                if (percent < 15) {\n                    row.classList.add('outside');\n                }\n\n                const countHtml = '<span id=\"' + name + '_count_' + rowIndex + '\">' + response.count + '</span>';\n                let responseCell = row.insertCell(0);\n                responseCell.onclick = function() {\n                    $(this).parent().toggleClass('selected-vote-option');\n                };\n\n                let barCell = row.insertCell(1);\n                barCell.classList.add('bar');\n                barCell.id = name + '_bar_' + rowIndex;\n                barCell.innerHTML = '<div style=\"width:' + percent + '%;\">' + countHtml + '</div>';\n\n                const latexId = name + '_latex_' + rowIndex;\n                responseCell.innerHTML = '<span id=\"' + latexId + '\"></span>';\n                Quiz.addMathjaxElement($('#' + latexId), response.response);\n                if (response.qtype === 'stack') {\n                    Quiz.renderMaximaEquation(response.response, latexId);\n                }\n            } else {\n                let currentRow = target.rows[currentRowIndex];\n                currentRow.dataset.rowIndex = rowIndex;\n                currentRow.dataset.responseIndex = i;\n                currentRow.dataset.percent = percent;\n                currentRow.dataset.count = response.count;\n                const containsOutside = currentRow.classList.contains('outside');\n                if (percent > 15 && containsOutside) {\n                    currentRow.classList.remove('outside');\n                } else if (percent < 15 && !containsOutside) {\n                    currentRow.classList.add('outside');\n                }\n                let countElement = document.getElementById(name + '_count_' + rowIndex);\n                if (countElement !== null) {\n                    countElement.innerHTML = response.count;\n                }\n                let barElement = document.getElementById(name + '_bar_' + rowIndex);\n                if (barElement !== null) {\n                    barElement.firstElementChild.style.width = percent + '%';\n                }\n            }\n        }\n\n        /**\n         * Create a new and unsorted response bar graph.\n         *\n         * @param {Array.<Object>} responses\n         * @param {string} name\n         * @param {string} targetId\n         * @param {string} graphId\n         * @param {boolean} rebuild If the table should be completely rebuilt or not\n         */\n        createBarGraph(responses, name, targetId, graphId, rebuild) {\n            let target = document.getElementById(targetId);\n            if (target === null) {\n                return;\n            }\n            let highestResponseCount = 0;\n            for (let i = 0; i < responses.length; i++) {\n                let count = parseInt(responses[i].count); // In case count is a string.\n                if (count > highestResponseCount) {\n                    highestResponseCount = count;\n                }\n            }\n\n            // Remove the rows if it should be rebuilt.\n            if (rebuild) {\n                target.innerHTML = '';\n            }\n\n            // Prune rows.\n            for (let i = 0; i < target.rows.length; i++) {\n                let prune = true;\n                for (let j = 0; j < responses.length; j++) {\n                    if (target.rows[i].dataset.response === responses[j].response) {\n                        prune = false;\n                        break;\n                    }\n                }\n                if (prune) {\n                    target.deleteRow(i);\n                    i--;\n                }\n            }\n\n            // Add rows.\n            this.createControls(name);\n            name += graphId;\n            for (let i = 0; i < responses.length; i++) {\n                this.addBarGraphRow(target, name, responses[i], i, highestResponseCount);\n            }\n        }\n\n        /**\n         * Sort the responses in the graph by how many had the same response.\n         * @param {string} targetId\n         */\n        static sortBarGraph(targetId) {\n            let target = document.getElementById(targetId);\n            if (target === null) {\n                return;\n            }\n            let isSorting = true;\n            while (isSorting) {\n                isSorting = false;\n                for (let i = 0; i < (target.rows.length - 1); i++) {\n                    const current = parseInt(target.rows[i].dataset.percent);\n                    const next = parseInt(target.rows[i + 1].dataset.percent);\n                    if (current < next) {\n                        target.rows[i].parentNode.insertBefore(target.rows[i + 1], target.rows[i]);\n                        isSorting = true;\n                        break;\n                    }\n                }\n            }\n        }\n\n        /**\n         * Create and sort a bar graph based on the responses passed.\n         * @param {string} wrapperId\n         * @param {string} tableId\n         * @param {Array.<Object>} responses\n         * @param {number|undefined} responded How many students responded to the question\n         * @param {string} questionType\n         * @param {string} graphId\n         * @param {boolean} rebuild If the graph should be rebuilt or not.\n         */\n        set(wrapperId, tableId, responses, responded, questionType, graphId, rebuild) {\n            if (responses === undefined) {\n                return;\n            }\n\n            // Check if any responses to show.\n            if (responses.length === 0) {\n                Quiz.show(Quiz.responded);\n                setText(Quiz.responded.find('h4'), 'a_out_of_b_responded', 'jazzquiz', {\n                    a: 0,\n                    b: this.totalStudents\n                });\n                return;\n            }\n\n            // Question type specific.\n            switch (questionType) {\n                case 'shortanswer':\n                    for (let i = 0; i < responses.length; i++) {\n                        responses[i].response = responses[i].response.trim();\n                    }\n                    break;\n                case 'stack':\n                    // Remove all spaces from responses.\n                    for (let i = 0; i < responses.length; i++) {\n                        responses[i].response = responses[i].response.replace(/\\s/g, '');\n                    }\n                    break;\n                default:\n                    break;\n            }\n\n            // Update data.\n            this.currentResponses = [];\n            this.respondedCount = 0;\n            for (let i = 0; i < responses.length; i++) {\n                let exists = false;\n                let count = 1;\n                if (responses[i].count !== undefined) {\n                    count = parseInt(responses[i].count);\n                }\n                this.respondedCount += count;\n                // Check if response is a duplicate.\n                for (let j = 0; j < this.currentResponses.length; j++) {\n                    if (this.currentResponses[j].response === responses[i].response) {\n                        this.currentResponses[j].count += count;\n                        exists = true;\n                        break;\n                    }\n                }\n                // Add element if not a duplicate.\n                if (!exists) {\n                    this.currentResponses.push({\n                        response: responses[i].response,\n                        count: count,\n                        qtype: questionType\n                    });\n                }\n            }\n\n            // Update responded container.\n            if (Quiz.responded.length !== 0 && responded !== undefined) {\n                Quiz.show(Quiz.responded);\n                setText(Quiz.responded.find('h4'), 'a_out_of_b_responded', 'jazzquiz', {\n                    a: responded,\n                    b: this.totalStudents\n                });\n            }\n\n            // Should we show the responses?\n            if (!this.showResponses && this.quiz.state !== 'reviewing') {\n                Quiz.hide(Quiz.responseInfo);\n                Quiz.hide(Quiz.responses);\n                return;\n            }\n\n            if (document.getElementById(tableId) === null) {\n                const html = '<table id=\"' + tableId + '\" class=\"jazzquiz-responses-overview\"></table>';\n                Quiz.show($('#' + wrapperId).html(html));\n            }\n            this.createBarGraph(this.currentResponses, 'current_response', tableId, graphId, rebuild);\n            ResponseView.sortBarGraph(tableId);\n        }\n\n        /**\n         * Fetch and show results for the ongoing or previous question.\n         * @param {boolean} rebuild If the response graph should be rebuilt or not.\n         */\n        refresh(rebuild) {\n            Ajax.get('get_results', {}, data => {\n                this.quiz.question.hasVotes = data.has_votes;\n                this.totalStudents = parseInt(data.total_students);\n\n                this.set('jazzquiz_responses_container', 'current_responses_wrapper',\n                    data.responses, data.responded, data.question_type, 'results', rebuild);\n\n                if (data.merge_count > 0) {\n                    Quiz.show($('#jazzquiz_undo_merge'));\n                } else {\n                    Quiz.hide($('#jazzquiz_undo_merge'));\n                }\n            });\n        }\n\n        /**\n         * Method refresh() equivalent for votes.\n         */\n        refreshVotes() {\n            // Should we show the results?\n            if (!this.showResponses && this.quiz.state !== 'reviewing') {\n                Quiz.hide(Quiz.responseInfo);\n                Quiz.hide(Quiz.responses);\n                return;\n            }\n            Ajax.get('get_vote_results', {}, data => {\n                const answers = data.answers;\n                const targetId = 'wrapper_vote_responses';\n                let responses = [];\n\n                this.respondedCount = 0;\n                this.totalStudents = parseInt(data.total_students);\n\n                for (let i in answers) {\n                    if (!answers.hasOwnProperty(i)) {\n                        continue;\n                    }\n                    responses.push({\n                        response: answers[i].attempt,\n                        count: answers[i].finalcount,\n                        qtype: answers[i].qtype,\n                        slot: answers[i].slot\n                    });\n                    this.respondedCount += parseInt(answers[i].finalcount);\n                }\n\n                setText(Quiz.responded.find('h4'), 'a_out_of_b_voted', 'jazzquiz', {\n                    a: this.respondedCount,\n                    b: this.totalStudents\n                });\n\n                if (document.getElementById(targetId) === null) {\n                    const html = '<table id=\"' + targetId + '\" class=\"jazzquiz-responses-overview\"></table>';\n                    Quiz.show(Quiz.responses.html(html));\n                }\n\n                this.createBarGraph(responses, 'vote_response', targetId, 'vote', false);\n                ResponseView.sortBarGraph(targetId);\n            });\n        }\n\n    }\n\n    class Instructor {\n\n        /**\n         * @param {Quiz} quiz\n         */\n        constructor(quiz) {\n            this.quiz = quiz;\n            this.responses = new ResponseView(quiz);\n            this.isShowingCorrectAnswer = false;\n            this.totalQuestions = 0;\n            this.allowVote = false;\n\n            $(document).on('keyup', event => {\n                if (event.keyCode === 27) { // Escape key.\n                    Instructor.closeFullscreenView();\n                }\n            });\n\n            $(document).on('click', event => {\n                Instructor.closeQuestionListMenu(event, 'improvise');\n                Instructor.closeQuestionListMenu(event, 'jump');\n            });\n\n            Instructor.addEvents({\n                'repoll': () => this.repollQuestion(),\n                'vote': () => this.runVoting(),\n                'improvise': () => this.showQuestionListSetup('improvise'),\n                'jump': () => this.showQuestionListSetup('jump'),\n                'next': () => this.nextQuestion(),\n                'random': () => this.randomQuestion(),\n                'end': () => this.endQuestion(),\n                'fullscreen': () => Instructor.showFullscreenView(),\n                'answer': () => this.showCorrectAnswer(),\n                'responses': () => this.responses.toggle(),\n                'exit': () => this.closeSession(),\n                'quit': () => this.closeSession(),\n                'startquiz': () => this.startQuiz()\n            });\n\n            Instructor.addHotkeys({\n                't': 'responses',\n                'r': 'repoll',\n                'a': 'answer',\n                'e': 'end',\n                'j': 'jump',\n                'i': 'improvise',\n                'v': 'vote',\n                'n': 'next',\n                'm': 'random',\n                'f': 'fullscreen'\n            });\n        }\n\n        static addHotkeys(keys) {\n            for (let key in keys) {\n                if (keys.hasOwnProperty(key)) {\n                    keys[key] = {\n                        action: keys[key],\n                        repeat: false // TODO: Maybe event.repeat becomes more standard?\n                    };\n                    $(document).on('keydown', event => {\n                        if (keys[key].repeat || event.ctrlKey) {\n                            return;\n                        }\n                        if (String.fromCharCode(event.which).toLowerCase() !== key) {\n                            return;\n                        }\n                        let focusedTag = $(':focus').prop('tagName');\n                        if (focusedTag !== undefined) {\n                            focusedTag = focusedTag.toLowerCase();\n                            if (focusedTag === 'input' || focusedTag === 'textarea') {\n                                return;\n                            }\n                        }\n                        event.preventDefault();\n                        keys[key].repeat = true;\n                        let $control = Instructor.control(keys[key].action);\n                        if ($control.length && !$control.prop('disabled')) {\n                            $control.click();\n                        }\n                    });\n                    $(document).on('keyup', event => {\n                        if (String.fromCharCode(event.which).toLowerCase() === key) {\n                            keys[key].repeat = false;\n                        }\n                    });\n                }\n            }\n        }\n\n        static addEvents(events) {\n            for (let key in events) {\n                if (events.hasOwnProperty(key)) {\n                    $(document).on('click', '#jazzquiz_control_' + key, () => {\n                        Instructor.enableControls([]);\n                        events[key]();\n                    });\n                }\n            }\n        }\n\n        static get controls() {\n            return $('#jazzquiz_controls_box');\n        }\n\n        static get controlButtons() {\n            return Instructor.controls.find('.quiz-control-buttons');\n        }\n\n        static control(key) {\n            return $('#jazzquiz_control_' + key);\n        }\n\n        static get side() {\n            return $('#jazzquiz_side_container');\n        }\n\n        static get correctAnswer() {\n            return $('#jazzquiz_correct_answer_container');\n        }\n\n        static get isMerging() {\n            return $('.merge-from').length !== 0;\n        }\n\n        onNotRunning(data) {\n            this.responses.totalStudents = data.student_count;\n            Quiz.hide(Instructor.side);\n            setText(Quiz.info, 'instructions_for_instructor');\n            Instructor.enableControls([]);\n            Quiz.hide(Instructor.controlButtons);\n            let $studentsJoined = Instructor.control('startquiz').next();\n            if (data.student_count === 1) {\n                setText($studentsJoined, 'one_student_has_joined');\n            } else if (data.student_count > 1) {\n                setText($studentsJoined, 'x_students_have_joined', 'jazzquiz', data.student_count);\n            } else {\n                setText($studentsJoined, 'no_students_have_joined');\n            }\n            Quiz.show(Instructor.control('startquiz').parent());\n        }\n\n        onPreparing(data) {\n            Quiz.hide(Instructor.side);\n            setText(Quiz.info, 'instructions_for_instructor');\n            let enabledButtons = ['improvise', 'jump', 'random', 'fullscreen', 'quit'];\n            if (data.slot < this.totalQuestions) {\n                enabledButtons.push('next');\n            }\n            Instructor.enableControls(enabledButtons);\n        }\n\n        onRunning(data) {\n            if (!this.responses.showResponses) {\n                this.responses.hide();\n            }\n            Quiz.show(Instructor.side);\n            Instructor.enableControls(['end', 'responses', 'fullscreen']);\n            this.quiz.question.questionTime = data.questiontime;\n            if (this.quiz.question.isRunning) {\n                // Check if the question has already ended.\n                // We need to do this because the state does not update unless an instructor is connected.\n                if (data.questionTime > 0 && data.delay < -data.questiontime) {\n                    this.endQuestion();\n                }\n                // Only rebuild results if we are not merging.\n                this.responses.refresh(!Instructor.isMerging);\n            } else {\n                const started = this.quiz.question.startCountdown(data.questiontime, data.delay);\n                if (started) {\n                    this.quiz.question.isRunning = true;\n                }\n            }\n        }\n\n        onReviewing(data) {\n            Quiz.show(Instructor.side);\n            let enabledButtons = ['answer', 'repoll', 'fullscreen', 'improvise', 'jump', 'random', 'quit'];\n            if (this.allowVote) {\n                enabledButtons.push('vote');\n            }\n            if (data.slot < this.totalQuestions) {\n                enabledButtons.push('next');\n            }\n            Instructor.enableControls(enabledButtons);\n\n            // In case page was refreshed, we should ensure the question is showing.\n            if (!Question.isLoaded()) {\n                this.quiz.question.refresh();\n            }\n\n            // For now, just always show responses while reviewing.\n            // In the future, there should be an additional toggle.\n            if (this.quiz.isNewState) {\n                this.responses.show();\n            }\n            // No longer in question.\n            this.quiz.question.isRunning = false;\n        }\n\n        onSessionClosed() {\n            Quiz.hide(Instructor.side);\n            Quiz.hide(Instructor.correctAnswer);\n            Instructor.enableControls([]);\n            this.responses.clear();\n            this.quiz.question.isRunning = false;\n        }\n\n        onVoting() {\n            if (!this.responses.showResponses) {\n                this.responses.hide();\n            }\n            Quiz.show(Instructor.side);\n            Instructor.enableControls(['quit', 'fullscreen', 'answer', 'responses', 'end']);\n            this.responses.refreshVotes();\n        }\n\n        onStateChange() {\n            $('#region-main').find('ul.nav.nav-tabs').css('display', 'none');\n            $('#region-main-settings-menu').css('display', 'none');\n            $('.region_main_settings_menu_proxy').css('display', 'none');\n            Quiz.show(Instructor.controlButtons);\n            Quiz.hide(Instructor.control('startquiz').parent());\n        }\n\n        onQuestionRefreshed(data) {\n            this.allowVote = data.voteable;\n        }\n\n        onTimerEnding() {\n            this.endQuestion();\n        }\n\n        onTimerTick(timeLeft) {\n            setText(Question.timer, 'x_seconds_left', 'jazzquiz', timeLeft);\n        }\n\n        /**\n         * Start the quiz. Does not start any questions.\n         */\n        startQuiz() {\n            Quiz.hide(Instructor.control('startquiz').parent());\n            Ajax.post('start_quiz', {}, () => $('#jazzquiz_controls').removeClass('btn-hide'));\n        }\n\n        /**\n         * End the currently ongoing question or vote.\n         */\n        endQuestion() {\n            this.quiz.question.hideTimer();\n            Ajax.post('end_question', {}, () => {\n                if (this.quiz.state === 'voting') {\n                    this.responses.showVotesUponReview = true;\n                } else {\n                    this.quiz.question.isRunning = false;\n                    Instructor.enableControls([]);\n                }\n            });\n        }\n\n        /**\n         * Show a question list dropdown.\n         * @param {string} name\n         */\n        showQuestionListSetup(name) {\n            let $controlButton = Instructor.control(name);\n            if ($controlButton.hasClass('active')) {\n                // It's already open. Let's not send another request.\n                return;\n            }\n            Ajax.get('list_' + name + '_questions', {}, data => {\n                let self = this;\n                let $menu = $('#jazzquiz_' + name + '_menu');\n                const menuMargin = $controlButton.offset().left - $controlButton.parent().offset().left;\n                $menu.html('').addClass('active').css('margin-left', menuMargin + 'px');\n                $controlButton.addClass('active');\n                const questions = data.questions;\n                for (let i in questions) {\n                    if (!questions.hasOwnProperty(i)) {\n                        continue;\n                    }\n                    let $questionButton = $('<button class=\"btn\"></button>');\n                    Quiz.addMathjaxElement($questionButton, questions[i].name);\n                    $questionButton.data({\n                        'time': questions[i].time,\n                        'question-id': questions[i].questionid,\n                        'jazzquiz-question-id': questions[i].jazzquizquestionid\n                    });\n                    $questionButton.data('test', 1);\n                    $questionButton.on('click', function() {\n                        const questionId = $(this).data('question-id');\n                        const time = $(this).data('time');\n                        const jazzQuestionId = $(this).data('jazzquiz-question-id');\n                        self.jumpQuestion(questionId, time, jazzQuestionId);\n                        $menu.html('').removeClass('active');\n                        $controlButton.removeClass('active');\n                    });\n                    $menu.append($questionButton);\n                }\n            });\n        }\n\n        /**\n         * Get the selected responses.\n         * @returns {Array.<Object>} Vote options\n         */\n        static getSelectedAnswersForVote() {\n            let result = [];\n            $('.selected-vote-option').each((i, option) => {\n                result.push({\n                    text: option.dataset.response,\n                    count: option.dataset.count\n                });\n            });\n            return result;\n        }\n\n        /**\n         * Start a vote with the responses that are currently selected.\n         */\n        runVoting() {\n            const options = Instructor.getSelectedAnswersForVote();\n            const data = {questions: encodeURIComponent(JSON.stringify(options))};\n            Ajax.post('run_voting', data);\n        }\n\n        /**\n         * Start a new question in this session.\n         * @param {string} method\n         * @param {number} questionId\n         * @param {number} questionTime\n         * @param {number} jazzquizQuestionId\n         */\n        startQuestion(method, questionId, questionTime, jazzquizQuestionId) {\n            Quiz.hide(Quiz.info);\n            this.responses.clear();\n            this.hideCorrectAnswer();\n            Ajax.post('start_question', {\n                method: method,\n                questionid: questionId,\n                questiontime: questionTime,\n                jazzquizquestionid: jazzquizQuestionId\n            }, data => this.quiz.question.startCountdown(data.questiontime, data.delay));\n        }\n\n        /**\n         * Jump to a planned question in the quiz.\n         * @param {number} questionId\n         * @param {number} questionTime\n         * @param {number} jazzquizQuestionId\n         */\n        jumpQuestion(questionId, questionTime, jazzquizQuestionId) {\n            this.startQuestion('jump', questionId, questionTime, jazzquizQuestionId);\n        }\n\n        /**\n         * Repoll the previously asked question.\n         */\n        repollQuestion() {\n            this.startQuestion('repoll', 0, 0, 0);\n        }\n\n        /**\n         * Continue on to the next preplanned question.\n         */\n        nextQuestion() {\n            this.startQuestion('next', 0, 0, 0);\n        }\n\n        /**\n         * Start a random question.\n         */\n        randomQuestion() {\n            this.startQuestion('random', 0, 0, 0);\n        }\n\n        /**\n         * Close the current session.\n         */\n        closeSession() {\n            Quiz.hide($('#jazzquiz_undo_merge'));\n            Quiz.hide(Question.box);\n            Quiz.hide(Instructor.controls);\n            setText(Quiz.info, 'closing_session');\n            // eslint-disable-next-line no-return-assign\n            Ajax.post('close_session', {}, () => window.location = location.href.split('&')[0]);\n        }\n\n        /**\n         * Hide the correct answer if showing.\n         */\n        hideCorrectAnswer() {\n            if (this.isShowingCorrectAnswer) {\n                Quiz.hide(Instructor.correctAnswer);\n                Quiz.uncheck(Instructor.control('answer'));\n                this.isShowingCorrectAnswer = false;\n            }\n        }\n\n        /**\n         * Request and show the correct answer for the ongoing or previous question.\n         */\n        showCorrectAnswer() {\n            this.hideCorrectAnswer();\n            Ajax.get('get_right_response', {}, data => {\n                Quiz.show(Instructor.correctAnswer.html(data.right_answer));\n                Quiz.renderAllMathjax();\n                Quiz.check(Instructor.control('answer'));\n                this.isShowingCorrectAnswer = true;\n            });\n        }\n\n        /**\n         * Enables all buttons passed in arguments, but disables all others.\n         * @param {Array.<string>} buttons The unique part of the IDs of the buttons to be enabled.\n         */\n        static enableControls(buttons) {\n            Instructor.controlButtons.children('button').each((index, child) => {\n                const id = child.getAttribute('id').replace('jazzquiz_control_', '');\n                child.disabled = (buttons.indexOf(id) === -1);\n            });\n        }\n\n        /**\n         * Enter fullscreen mode for better use with projectors.\n         */\n        static showFullscreenView() {\n            if (Quiz.main.hasClass('jazzquiz-fullscreen')) {\n                Instructor.closeFullscreenView();\n                return;\n            }\n            // Hide the scrollbar - remember to always set back to auto when closing.\n            document.documentElement.style.overflowY = 'hidden';\n            // Sets the quiz view to an absolute position that covers the viewport.\n            Quiz.main.addClass('jazzquiz-fullscreen');\n        }\n\n        /**\n         * Exit the fullscreen mode.\n         */\n        static closeFullscreenView() {\n            document.documentElement.style.overflowY = 'auto';\n            Quiz.main.removeClass('jazzquiz-fullscreen');\n        }\n\n        /**\n         * Close the dropdown menu for choosing a question.\n         * @param {Event} event\n         * @param {string} name\n         */\n        static closeQuestionListMenu(event, name) {\n            const menuId = '#jazzquiz_' + name + '_menu';\n            // Close the menu if the click was not inside.\n            const menu = $(event.target).closest(menuId);\n            if (!menu.length) {\n                $(menuId).html('').removeClass('active');\n                Instructor.control(name).removeClass('active');\n            }\n        }\n\n        static addReportEventHandlers() {\n            $(document).on('click', '#report_overview_controls button', function() {\n                const action = $(this).data('action');\n                if (action === 'attendance') {\n                    $('#report_overview_responded').fadeIn();\n                    $('#report_overview_responses').fadeOut();\n                } else if (action === 'responses') {\n                    $('#report_overview_responses').fadeIn();\n                    $('#report_overview_responded').fadeOut();\n                }\n            });\n        }\n\n    }\n\n    return {\n        initialize: function(totalQuestions, reportView, slots) {\n            let quiz = new Quiz(Instructor);\n            quiz.role.totalQuestions = totalQuestions;\n            if (reportView) {\n                Instructor.addReportEventHandlers();\n                quiz.role.responses.showResponses = true;\n                slots.forEach(slot => {\n                    const wrapper = 'jazzquiz_wrapper_responses_' + slot.num;\n                    const table = 'responses_wrapper_table_' + slot.num;\n                    const graph = 'report_' + slot.num;\n                    quiz.role.responses.set(wrapper, table, slot.responses, undefined, slot.type, graph, false);\n                });\n            } else {\n                quiz.poll(500);\n            }\n        }\n    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\ No newline at end of file
diff --git a/amd/build/student.min.js b/amd/build/student.min.js
index 7333d64..d7e6350 100644
--- a/amd/build/student.min.js
+++ b/amd/build/student.min.js
@@ -1,10 +1,10 @@
 /**
- * @package   mod_jazzquiz
+ * @module    mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>
  * @copyright 2014 University of Wisconsin - Madison
  * @copyright 2018 NTNU
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-define("mod_jazzquiz/student",["jquery","mod_jazzquiz/core"],(function($,Jazz){const Quiz=Jazz.Quiz,Question=Jazz.Question,Ajax=Jazz.Ajax,setText=Jazz.setText;class Student{constructor(quiz){this.quiz=quiz,this.voteAnswer=void 0;let self=this;$(document).on("submit","#jazzquiz_question_form",(function(event){event.preventDefault(),self.submitAnswer()})).on("click","#jazzquiz_save_vote",(function(){self.saveVote()})).on("click",".jazzquiz-select-vote",(function(){self.voteAnswer=this.value}))}onNotRunning(data){setText(Quiz.info,"instructions_for_student")}onPreparing(data){setText(Quiz.info,"wait_for_instructor")}onRunning(data){if(this.quiz.question.isRunning)return;this.quiz.question.startCountdown(data.questiontime,data.delay)||setText(Quiz.info,"wait_for_instructor")}onReviewing(data){this.quiz.question.isVoteRunning=!1,this.quiz.question.isRunning=!1,this.quiz.question.hideTimer(),Quiz.hide(Question.box),setText(Quiz.info,"wait_for_instructor")}onSessionClosed(data){window.location=location.href.split("&")[0]}onVoting(data){if(this.quiz.question.isVoteRunning)return;Quiz.info.html(data.html),Quiz.show(Quiz.info);const options=data.options;for(let i=0;i<options.length;i++)Quiz.addMathjaxElement($("#"+options[i].content_id),options[i].text),"stack"===options[i].question_type&&Quiz.renderMaximaEquation(options[i].text,options[i].content_id);this.quiz.question.isVoteRunning=!0}onStateChange(state){}onQuestionTimerEnding(){}onTimerTick(timeLeft){setText(Question.timer,"question_will_end_in_x_seconds","jazzquiz",timeLeft)}onQuestionRefreshed(data){}submitAnswer(){if(this.quiz.question.isSaving)return;this.quiz.question.isSaving=!0,"undefined"!=typeof tinyMCE&&tinyMCE.triggerSave();const serialized=Question.form.serializeArray();let data={};for(let name in serialized)serialized.hasOwnProperty(name)&&(data[serialized[name].name]=serialized[name].value);Ajax.post("save_question",data,(data=>{data.feedback.length>0?Quiz.show(Quiz.info.html(data.feedback)):setText(Quiz.info,"wait_for_instructor"),this.quiz.question.isSaving=!1,this.quiz.question.isRunning&&(this.quiz.question.isVoteRunning||(Quiz.hide(Question.box),this.quiz.question.hideTimer()))})).fail((()=>{this.quiz.question.isSaving=!1}))}saveVote(){Ajax.post("save_vote",{vote:this.voteAnswer},(data=>{"success"===data.status?setText(Quiz.info,"wait_for_instructor"):setText(Quiz.info,"you_already_voted")}))}}return{initialize:()=>{new Quiz(Student).poll(2e3)}}}));
+define("mod_jazzquiz/student",["jquery","mod_jazzquiz/core"],(function($,Jazz){const Quiz=Jazz.Quiz,Question=Jazz.Question,Ajax=Jazz.Ajax,setText=Jazz.setText;class Student{constructor(quiz){this.quiz=quiz,this.voteAnswer=void 0;let self=this;$(document).on("submit","#jazzquiz_question_form",(function(event){event.preventDefault(),self.submitAnswer()})).on("click","#jazzquiz_save_vote",(function(){self.saveVote()})).on("click",".jazzquiz-select-vote",(function(){self.voteAnswer=this.value}))}onNotRunning(){setText(Quiz.info,"instructions_for_student")}onPreparing(){setText(Quiz.info,"wait_for_instructor")}onRunning(data){if(this.quiz.question.isRunning)return;this.quiz.question.startCountdown(data.questiontime,data.delay)||setText(Quiz.info,"wait_for_instructor")}onReviewing(){this.quiz.question.isVoteRunning=!1,this.quiz.question.isRunning=!1,this.quiz.question.hideTimer(),Quiz.hide(Question.box),setText(Quiz.info,"wait_for_instructor")}onSessionClosed(){window.location=location.href.split("&")[0]}onVoting(data){if(this.quiz.question.isVoteRunning)return;Quiz.info.html(data.html),Quiz.show(Quiz.info);const options=data.options;for(let i=0;i<options.length;i++)Quiz.addMathjaxElement($("#"+options[i].content_id),options[i].text),"stack"===options[i].question_type&&Quiz.renderMaximaEquation(options[i].text,options[i].content_id);this.quiz.question.isVoteRunning=!0}onTimerTick(timeLeft){setText(Question.timer,"question_will_end_in_x_seconds","jazzquiz",timeLeft)}submitAnswer(){if(this.quiz.question.isSaving)return;this.quiz.question.isSaving=!0,"undefined"!=typeof tinyMCE&&tinyMCE.triggerSave();const serialized=Question.form.serializeArray();let data={};for(let name in serialized)serialized.hasOwnProperty(name)&&(data[serialized[name].name]=serialized[name].value);Ajax.post("save_question",data,(data=>{data.feedback.length>0?Quiz.show(Quiz.info.html(data.feedback)):setText(Quiz.info,"wait_for_instructor"),this.quiz.question.isSaving=!1,this.quiz.question.isRunning&&(this.quiz.question.isVoteRunning||(Quiz.hide(Question.box),this.quiz.question.hideTimer()))})).fail((()=>{this.quiz.question.isSaving=!1}))}saveVote(){Ajax.post("save_vote",{vote:this.voteAnswer},(data=>{"success"===data.status?setText(Quiz.info,"wait_for_instructor"):setText(Quiz.info,"you_already_voted")}))}}return{initialize:()=>{new Quiz(Student).poll(2e3)}}}));
 
 //# sourceMappingURL=student.min.js.map
\ No newline at end of file
diff --git a/amd/build/student.min.js.map b/amd/build/student.min.js.map
index 8ce49a8..d0be37e 100644
--- a/amd/build/student.min.js.map
+++ b/amd/build/student.min.js.map
@@ -1 +1 @@
-{"version":3,"file":"student.min.js","sources":["../src/student.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * @package   mod_jazzquiz\n * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>\n * @copyright 2014 University of Wisconsin - Madison\n * @copyright 2018 NTNU\n * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\ndefine(['jquery', 'mod_jazzquiz/core'], function ($, Jazz) {\n\n    const Quiz = Jazz.Quiz;\n    const Question = Jazz.Question;\n    const Ajax = Jazz.Ajax;\n    const setText = Jazz.setText;\n\n    class Student {\n\n        /**\n         * @param {Quiz} quiz\n         */\n        constructor(quiz) {\n            this.quiz = quiz;\n            this.voteAnswer = undefined;\n            let self = this;\n            $(document).on('submit', '#jazzquiz_question_form', function(event) {\n                event.preventDefault();\n                self.submitAnswer();\n            }).on('click', '#jazzquiz_save_vote', function() {\n                self.saveVote();\n            }).on('click', '.jazzquiz-select-vote', function() {\n                self.voteAnswer = this.value;\n            });\n        }\n\n        onNotRunning(data) {\n            setText(Quiz.info, 'instructions_for_student');\n        }\n\n        onPreparing(data) {\n            setText(Quiz.info, 'wait_for_instructor');\n        }\n\n        onRunning(data) {\n            if (this.quiz.question.isRunning) {\n                return;\n            }\n            const started = this.quiz.question.startCountdown(data.questiontime, data.delay);\n            if (!started) {\n                setText(Quiz.info, 'wait_for_instructor');\n            }\n        }\n\n        onReviewing(data) {\n            this.quiz.question.isVoteRunning = false;\n            this.quiz.question.isRunning = false;\n            this.quiz.question.hideTimer();\n            Quiz.hide(Question.box);\n            setText(Quiz.info, 'wait_for_instructor');\n        }\n\n        onSessionClosed(data) {\n            window.location = location.href.split('&')[0];\n        }\n\n        onVoting(data) {\n            if (this.quiz.question.isVoteRunning) {\n                return;\n            }\n            Quiz.info.html(data.html);\n            Quiz.show(Quiz.info);\n            const options = data.options;\n            for (let i = 0; i < options.length; i++) {\n                Quiz.addMathjaxElement($('#' + options[i].content_id), options[i].text);\n                if (options[i].question_type === 'stack') {\n                    Quiz.renderMaximaEquation(options[i].text, options[i].content_id);\n                }\n            }\n            this.quiz.question.isVoteRunning = true;\n        }\n\n        onStateChange(state) {\n\n        }\n\n        onQuestionTimerEnding() {\n\n        }\n\n        onTimerTick(timeLeft) {\n            setText(Question.timer, 'question_will_end_in_x_seconds', 'jazzquiz', timeLeft);\n        }\n\n        onQuestionRefreshed(data) {\n\n        }\n\n        /**\n         * Submit answer for the current question.\n         */\n        submitAnswer() {\n            if (this.quiz.question.isSaving) {\n                // Don't save twice.\n                return;\n            }\n            this.quiz.question.isSaving = true;\n            if (typeof tinyMCE !== 'undefined') {\n                tinyMCE.triggerSave();\n            }\n            const serialized = Question.form.serializeArray();\n            let data = {};\n            for (let name in serialized) {\n                if (serialized.hasOwnProperty(name)) {\n                    data[serialized[name].name] = serialized[name].value;\n                }\n            }\n            Ajax.post('save_question', data, data => {\n                if (data.feedback.length > 0) {\n                    Quiz.show(Quiz.info.html(data.feedback));\n                } else {\n                    setText(Quiz.info, 'wait_for_instructor');\n                }\n                this.quiz.question.isSaving = false;\n                if (!this.quiz.question.isRunning) {\n                    return;\n                }\n                if (this.quiz.question.isVoteRunning) {\n                    return;\n                }\n                Quiz.hide(Question.box);\n                this.quiz.question.hideTimer();\n            }).fail(() => {\n                this.quiz.question.isSaving = false;\n            });\n        }\n\n        saveVote() {\n            Ajax.post('save_vote', {vote: this.voteAnswer}, data => {\n                if (data.status === 'success') {\n                    setText(Quiz.info, 'wait_for_instructor');\n                } else {\n                    setText(Quiz.info, 'you_already_voted');\n                }\n            });\n        }\n\n    }\n\n    return {\n        initialize: () => {\n            let quiz = new Quiz(Student);\n            quiz.poll(2000);\n        }\n    }\n\n});\n"],"names":["define","$","Jazz","Quiz","Question","Ajax","setText","Student","constructor","quiz","voteAnswer","undefined","self","this","document","on","event","preventDefault","submitAnswer","saveVote","value","onNotRunning","data","info","onPreparing","onRunning","question","isRunning","startCountdown","questiontime","delay","onReviewing","isVoteRunning","hideTimer","hide","box","onSessionClosed","window","location","href","split","onVoting","html","show","options","i","length","addMathjaxElement","content_id","text","question_type","renderMaximaEquation","onStateChange","state","onQuestionTimerEnding","onTimerTick","timeLeft","timer","onQuestionRefreshed","isSaving","tinyMCE","triggerSave","serialized","form","serializeArray","name","hasOwnProperty","post","feedback","fail","vote","status","initialize","poll"],"mappings":";;;;;;;AAuBAA,8BAAO,CAAC,SAAU,sBAAsB,SAAUC,EAAGC,YAE3CC,KAAOD,KAAKC,KACZC,SAAWF,KAAKE,SAChBC,KAAOH,KAAKG,KACZC,QAAUJ,KAAKI,cAEfC,QAKFC,YAAYC,WACHA,KAAOA,UACPC,gBAAaC,MACdC,KAAOC,KACXZ,EAAEa,UAAUC,GAAG,SAAU,2BAA2B,SAASC,OACzDA,MAAMC,iBACNL,KAAKM,kBACNH,GAAG,QAAS,uBAAuB,WAClCH,KAAKO,cACNJ,GAAG,QAAS,yBAAyB,WACpCH,KAAKF,WAAaG,KAAKO,SAI/BC,aAAaC,MACThB,QAAQH,KAAKoB,KAAM,4BAGvBC,YAAYF,MACRhB,QAAQH,KAAKoB,KAAM,uBAGvBE,UAAUH,SACFT,KAAKJ,KAAKiB,SAASC,iBAGPd,KAAKJ,KAAKiB,SAASE,eAAeN,KAAKO,aAAcP,KAAKQ,QAEtExB,QAAQH,KAAKoB,KAAM,uBAI3BQ,YAAYT,WACHb,KAAKiB,SAASM,eAAgB,OAC9BvB,KAAKiB,SAASC,WAAY,OAC1BlB,KAAKiB,SAASO,YACnB9B,KAAK+B,KAAK9B,SAAS+B,KACnB7B,QAAQH,KAAKoB,KAAM,uBAGvBa,gBAAgBd,MACZe,OAAOC,SAAWA,SAASC,KAAKC,MAAM,KAAK,GAG/CC,SAASnB,SACDT,KAAKJ,KAAKiB,SAASM,qBAGvB7B,KAAKoB,KAAKmB,KAAKpB,KAAKoB,MACpBvC,KAAKwC,KAAKxC,KAAKoB,YACTqB,QAAUtB,KAAKsB,YAChB,IAAIC,EAAI,EAAGA,EAAID,QAAQE,OAAQD,IAChC1C,KAAK4C,kBAAkB9C,EAAE,IAAM2C,QAAQC,GAAGG,YAAaJ,QAAQC,GAAGI,MACjC,UAA7BL,QAAQC,GAAGK,eACX/C,KAAKgD,qBAAqBP,QAAQC,GAAGI,KAAML,QAAQC,GAAGG,iBAGzDvC,KAAKiB,SAASM,eAAgB,EAGvCoB,cAAcC,QAIdC,yBAIAC,YAAYC,UACRlD,QAAQF,SAASqD,MAAO,iCAAkC,WAAYD,UAG1EE,oBAAoBpC,OAOpBJ,kBACQL,KAAKJ,KAAKiB,SAASiC,qBAIlBlD,KAAKiB,SAASiC,UAAW,EACP,oBAAZC,SACPA,QAAQC,oBAENC,WAAa1D,SAAS2D,KAAKC,qBAC7B1C,KAAO,OACN,IAAI2C,QAAQH,WACTA,WAAWI,eAAeD,QAC1B3C,KAAKwC,WAAWG,MAAMA,MAAQH,WAAWG,MAAM7C,OAGvDf,KAAK8D,KAAK,gBAAiB7C,MAAMA,OACzBA,KAAK8C,SAAStB,OAAS,EACvB3C,KAAKwC,KAAKxC,KAAKoB,KAAKmB,KAAKpB,KAAK8C,WAE9B9D,QAAQH,KAAKoB,KAAM,4BAElBd,KAAKiB,SAASiC,UAAW,EACzB9C,KAAKJ,KAAKiB,SAASC,YAGpBd,KAAKJ,KAAKiB,SAASM,gBAGvB7B,KAAK+B,KAAK9B,SAAS+B,UACd1B,KAAKiB,SAASO,iBACpBoC,MAAK,UACC5D,KAAKiB,SAASiC,UAAW,KAItCxC,WACId,KAAK8D,KAAK,YAAa,CAACG,KAAMzD,KAAKH,aAAaY,OACxB,YAAhBA,KAAKiD,OACLjE,QAAQH,KAAKoB,KAAM,uBAEnBjB,QAAQH,KAAKoB,KAAM,+BAO5B,CACHiD,WAAY,KACG,IAAIrE,KAAKI,SACfkE,KAAK"}
\ No newline at end of file
+{"version":3,"file":"student.min.js","sources":["../src/student.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * @module    mod_jazzquiz\n * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>\n * @copyright 2014 University of Wisconsin - Madison\n * @copyright 2018 NTNU\n * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\ndefine(['jquery', 'mod_jazzquiz/core'], function($, Jazz) {\n\n    const Quiz = Jazz.Quiz;\n    const Question = Jazz.Question;\n    const Ajax = Jazz.Ajax;\n    const setText = Jazz.setText;\n\n    class Student {\n\n        /**\n         * @param {Quiz} quiz\n         */\n        constructor(quiz) {\n            this.quiz = quiz;\n            this.voteAnswer = undefined;\n            let self = this;\n            $(document).on('submit', '#jazzquiz_question_form', function(event) {\n                event.preventDefault();\n                self.submitAnswer();\n            }).on('click', '#jazzquiz_save_vote', function() {\n                self.saveVote();\n            }).on('click', '.jazzquiz-select-vote', function() {\n                self.voteAnswer = this.value;\n            });\n        }\n\n        onNotRunning() {\n            setText(Quiz.info, 'instructions_for_student');\n        }\n\n        onPreparing() {\n            setText(Quiz.info, 'wait_for_instructor');\n        }\n\n        onRunning(data) {\n            if (this.quiz.question.isRunning) {\n                return;\n            }\n            const started = this.quiz.question.startCountdown(data.questiontime, data.delay);\n            if (!started) {\n                setText(Quiz.info, 'wait_for_instructor');\n            }\n        }\n\n        onReviewing() {\n            this.quiz.question.isVoteRunning = false;\n            this.quiz.question.isRunning = false;\n            this.quiz.question.hideTimer();\n            Quiz.hide(Question.box);\n            setText(Quiz.info, 'wait_for_instructor');\n        }\n\n        onSessionClosed() {\n            window.location = location.href.split('&')[0];\n        }\n\n        onVoting(data) {\n            if (this.quiz.question.isVoteRunning) {\n                return;\n            }\n            Quiz.info.html(data.html);\n            Quiz.show(Quiz.info);\n            const options = data.options;\n            for (let i = 0; i < options.length; i++) {\n                Quiz.addMathjaxElement($('#' + options[i].content_id), options[i].text);\n                if (options[i].question_type === 'stack') {\n                    Quiz.renderMaximaEquation(options[i].text, options[i].content_id);\n                }\n            }\n            this.quiz.question.isVoteRunning = true;\n        }\n\n        onTimerTick(timeLeft) {\n            setText(Question.timer, 'question_will_end_in_x_seconds', 'jazzquiz', timeLeft);\n        }\n\n        /**\n         * Submit answer for the current question.\n         */\n        submitAnswer() {\n            if (this.quiz.question.isSaving) {\n                // Don't save twice.\n                return;\n            }\n            this.quiz.question.isSaving = true;\n            // eslint-disable-next-line no-undef\n            if (typeof tinyMCE !== 'undefined') {\n                // eslint-disable-next-line no-undef\n                tinyMCE.triggerSave();\n            }\n            const serialized = Question.form.serializeArray();\n            let data = {};\n            for (let name in serialized) {\n                if (serialized.hasOwnProperty(name)) {\n                    data[serialized[name].name] = serialized[name].value;\n                }\n            }\n            Ajax.post('save_question', data, data => {\n                if (data.feedback.length > 0) {\n                    Quiz.show(Quiz.info.html(data.feedback));\n                } else {\n                    setText(Quiz.info, 'wait_for_instructor');\n                }\n                this.quiz.question.isSaving = false;\n                if (!this.quiz.question.isRunning) {\n                    return;\n                }\n                if (this.quiz.question.isVoteRunning) {\n                    return;\n                }\n                Quiz.hide(Question.box);\n                this.quiz.question.hideTimer();\n            }).fail(() => {\n                this.quiz.question.isSaving = false;\n            });\n        }\n\n        saveVote() {\n            Ajax.post('save_vote', {vote: this.voteAnswer}, data => {\n                if (data.status === 'success') {\n                    setText(Quiz.info, 'wait_for_instructor');\n                } else {\n                    setText(Quiz.info, 'you_already_voted');\n                }\n            });\n        }\n\n    }\n\n    return {\n        initialize: () => {\n            let quiz = new Quiz(Student);\n            quiz.poll(2000);\n        }\n    };\n\n});\n"],"names":["define","$","Jazz","Quiz","Question","Ajax","setText","Student","constructor","quiz","voteAnswer","undefined","self","this","document","on","event","preventDefault","submitAnswer","saveVote","value","onNotRunning","info","onPreparing","onRunning","data","question","isRunning","startCountdown","questiontime","delay","onReviewing","isVoteRunning","hideTimer","hide","box","onSessionClosed","window","location","href","split","onVoting","html","show","options","i","length","addMathjaxElement","content_id","text","question_type","renderMaximaEquation","onTimerTick","timeLeft","timer","isSaving","tinyMCE","triggerSave","serialized","form","serializeArray","name","hasOwnProperty","post","feedback","fail","vote","status","initialize","poll"],"mappings":";;;;;;;AAuBAA,8BAAO,CAAC,SAAU,sBAAsB,SAASC,EAAGC,YAE1CC,KAAOD,KAAKC,KACZC,SAAWF,KAAKE,SAChBC,KAAOH,KAAKG,KACZC,QAAUJ,KAAKI,cAEfC,QAKFC,YAAYC,WACHA,KAAOA,UACPC,gBAAaC,MACdC,KAAOC,KACXZ,EAAEa,UAAUC,GAAG,SAAU,2BAA2B,SAASC,OACzDA,MAAMC,iBACNL,KAAKM,kBACNH,GAAG,QAAS,uBAAuB,WAClCH,KAAKO,cACNJ,GAAG,QAAS,yBAAyB,WACpCH,KAAKF,WAAaG,KAAKO,SAI/BC,eACIf,QAAQH,KAAKmB,KAAM,4BAGvBC,cACIjB,QAAQH,KAAKmB,KAAM,uBAGvBE,UAAUC,SACFZ,KAAKJ,KAAKiB,SAASC,iBAGPd,KAAKJ,KAAKiB,SAASE,eAAeH,KAAKI,aAAcJ,KAAKK,QAEtExB,QAAQH,KAAKmB,KAAM,uBAI3BS,mBACStB,KAAKiB,SAASM,eAAgB,OAC9BvB,KAAKiB,SAASC,WAAY,OAC1BlB,KAAKiB,SAASO,YACnB9B,KAAK+B,KAAK9B,SAAS+B,KACnB7B,QAAQH,KAAKmB,KAAM,uBAGvBc,kBACIC,OAAOC,SAAWA,SAASC,KAAKC,MAAM,KAAK,GAG/CC,SAAShB,SACDZ,KAAKJ,KAAKiB,SAASM,qBAGvB7B,KAAKmB,KAAKoB,KAAKjB,KAAKiB,MACpBvC,KAAKwC,KAAKxC,KAAKmB,YACTsB,QAAUnB,KAAKmB,YAChB,IAAIC,EAAI,EAAGA,EAAID,QAAQE,OAAQD,IAChC1C,KAAK4C,kBAAkB9C,EAAE,IAAM2C,QAAQC,GAAGG,YAAaJ,QAAQC,GAAGI,MACjC,UAA7BL,QAAQC,GAAGK,eACX/C,KAAKgD,qBAAqBP,QAAQC,GAAGI,KAAML,QAAQC,GAAGG,iBAGzDvC,KAAKiB,SAASM,eAAgB,EAGvCoB,YAAYC,UACR/C,QAAQF,SAASkD,MAAO,iCAAkC,WAAYD,UAM1EnC,kBACQL,KAAKJ,KAAKiB,SAAS6B,qBAIlB9C,KAAKiB,SAAS6B,UAAW,EAEP,oBAAZC,SAEPA,QAAQC,oBAENC,WAAatD,SAASuD,KAAKC,qBAC7BnC,KAAO,OACN,IAAIoC,QAAQH,WACTA,WAAWI,eAAeD,QAC1BpC,KAAKiC,WAAWG,MAAMA,MAAQH,WAAWG,MAAMzC,OAGvDf,KAAK0D,KAAK,gBAAiBtC,MAAMA,OACzBA,KAAKuC,SAASlB,OAAS,EACvB3C,KAAKwC,KAAKxC,KAAKmB,KAAKoB,KAAKjB,KAAKuC,WAE9B1D,QAAQH,KAAKmB,KAAM,4BAElBb,KAAKiB,SAAS6B,UAAW,EACzB1C,KAAKJ,KAAKiB,SAASC,YAGpBd,KAAKJ,KAAKiB,SAASM,gBAGvB7B,KAAK+B,KAAK9B,SAAS+B,UACd1B,KAAKiB,SAASO,iBACpBgC,MAAK,UACCxD,KAAKiB,SAAS6B,UAAW,KAItCpC,WACId,KAAK0D,KAAK,YAAa,CAACG,KAAMrD,KAAKH,aAAae,OACxB,YAAhBA,KAAK0C,OACL7D,QAAQH,KAAKmB,KAAM,uBAEnBhB,QAAQH,KAAKmB,KAAM,+BAO5B,CACH8C,WAAY,KACG,IAAIjE,KAAKI,SACf8D,KAAK"}
\ No newline at end of file
diff --git a/amd/src/core.js b/amd/src/core.js
index 4e7f989..d669cd7 100755
--- a/amd/src/core.js
+++ b/amd/src/core.js
@@ -40,6 +40,7 @@ define(['jquery', 'core/config', 'core/str', 'core/yui', 'core/event'], function
 
         /**
          * Send a request using AJAX, with method specified.
+         *
          * @param {string} method Which HTTP method to use.
          * @param {string} url Relative to root of jazzquiz module. Does not start with /.
          * @param {Object} data Object with parameters as properties. Reserved: id, quizid, sessionid, attemptid, sesskey
@@ -133,7 +134,9 @@ define(['jquery', 'core/config', 'core/str', 'core/yui', 'core/event'], function
                     style.href = cssUrl;
                     head.appendChild(style);
                 });
-                this.quiz.role.onQuestionRefreshed(data);
+                if (this.quiz.role.onQuestionRefreshed !== undefined) {
+                    this.quiz.role.onQuestionRefreshed(data);
+                }
                 Quiz.renderAllMathjax();
             });
         }
@@ -263,7 +266,9 @@ define(['jquery', 'core/config', 'core/str', 'core/yui', 'core/event'], function
         changeQuizState(state, data) {
             this.isNewState = (this.state !== state);
             this.state = state;
-            this.role.onStateChange();
+            if (this.role.onStateChange !== undefined) {
+                this.role.onStateChange();
+            }
             const event = this.events[state];
             this.role[event](data);
         }
@@ -360,7 +365,7 @@ define(['jquery', 'core/config', 'core/str', 'core/yui', 'core/event'], function
      * @param {*} $element
      * @param {string} key Which string in the language file we want.
      * @param {string} [from=jazzquiz] Which language file we want the string from. Default is jazzquiz.
-     * @param {array} args This is {$a} in the string for the key.
+     * @param {array} [args=[]] This is {$a} in the string for the key.
      */
     function setText($element, key, from, args) {
         from = (from !== undefined) ? from : 'jazzquiz';
diff --git a/amd/src/edit.js b/amd/src/edit.js
index 5c0d631..47899c0 100755
--- a/amd/src/edit.js
+++ b/amd/src/edit.js
@@ -13,7 +13,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-
 import Sortable from '../../js/sortable.min.js';
 
 /**
diff --git a/amd/src/instructor.js b/amd/src/instructor.js
index 6fe6111..d27c4ad 100755
--- a/amd/src/instructor.js
+++ b/amd/src/instructor.js
@@ -180,8 +180,77 @@ define(['jquery', 'mod_jazzquiz/core'], function($, Jazz) {
             }
         }
 
+        addBarGraphRow(target, name, response, i, highestResponseCount) {
+            // Const percent = (parseInt(responses[i].count) / total) * 100;
+            const percent = (parseInt(response.count) / highestResponseCount) * 100;
+
+            // Check if row with same response already exists.
+            let rowIndex = -1;
+            let currentRowIndex = -1;
+            for (let j = 0; j < target.rows.length; j++) {
+                if (target.rows[j].dataset.response === response.response) {
+                    rowIndex = parseInt(target.rows[j].dataset.rowIndex);
+                    currentRowIndex = j;
+                    break;
+                }
+            }
+
+            if (rowIndex === -1) {
+                rowIndex = target.rows.length;
+                let row = target.insertRow();
+                row.dataset.responseIndex = i;
+                row.dataset.response = response.response;
+                row.dataset.percent = percent;
+                row.dataset.rowIndex = rowIndex;
+                row.dataset.count = response.count;
+                row.classList.add('selected-vote-option');
+                if (percent < 15) {
+                    row.classList.add('outside');
+                }
+
+                const countHtml = '<span id="' + name + '_count_' + rowIndex + '">' + response.count + '</span>';
+                let responseCell = row.insertCell(0);
+                responseCell.onclick = function() {
+                    $(this).parent().toggleClass('selected-vote-option');
+                };
+
+                let barCell = row.insertCell(1);
+                barCell.classList.add('bar');
+                barCell.id = name + '_bar_' + rowIndex;
+                barCell.innerHTML = '<div style="width:' + percent + '%;">' + countHtml + '</div>';
+
+                const latexId = name + '_latex_' + rowIndex;
+                responseCell.innerHTML = '<span id="' + latexId + '"></span>';
+                Quiz.addMathjaxElement($('#' + latexId), response.response);
+                if (response.qtype === 'stack') {
+                    Quiz.renderMaximaEquation(response.response, latexId);
+                }
+            } else {
+                let currentRow = target.rows[currentRowIndex];
+                currentRow.dataset.rowIndex = rowIndex;
+                currentRow.dataset.responseIndex = i;
+                currentRow.dataset.percent = percent;
+                currentRow.dataset.count = response.count;
+                const containsOutside = currentRow.classList.contains('outside');
+                if (percent > 15 && containsOutside) {
+                    currentRow.classList.remove('outside');
+                } else if (percent < 15 && !containsOutside) {
+                    currentRow.classList.add('outside');
+                }
+                let countElement = document.getElementById(name + '_count_' + rowIndex);
+                if (countElement !== null) {
+                    countElement.innerHTML = response.count;
+                }
+                let barElement = document.getElementById(name + '_bar_' + rowIndex);
+                if (barElement !== null) {
+                    barElement.firstElementChild.style.width = percent + '%';
+                }
+            }
+        }
+
         /**
          * Create a new and unsorted response bar graph.
+         *
          * @param {Array.<Object>} responses
          * @param {string} name
          * @param {string} targetId
@@ -193,18 +262,12 @@ define(['jquery', 'mod_jazzquiz/core'], function($, Jazz) {
             if (target === null) {
                 return;
             }
-            let total = 0;
             let highestResponseCount = 0;
             for (let i = 0; i < responses.length; i++) {
                 let count = parseInt(responses[i].count); // In case count is a string.
-                total += count;
                 if (count > highestResponseCount) {
                     highestResponseCount = count;
                 }
-
-            }
-            if (total === 0) {
-                total = 1;
             }
 
             // Remove the rows if it should be rebuilt.
@@ -227,77 +290,11 @@ define(['jquery', 'mod_jazzquiz/core'], function($, Jazz) {
                 }
             }
 
+            // Add rows.
             this.createControls(name);
-
             name += graphId;
-
-            // Add rows.
             for (let i = 0; i < responses.length; i++) {
-                // Const percent = (parseInt(responses[i].count) / total) * 100;
-                const percent = (parseInt(responses[i].count) / highestResponseCount) * 100;
-
-                // Check if row with same response already exists.
-                let rowIndex = -1;
-                let currentRowIndex = -1;
-                for (let j = 0; j < target.rows.length; j++) {
-                    if (target.rows[j].dataset.response === responses[i].response) {
-                        rowIndex = target.rows[j].dataset.row_i;
-                        currentRowIndex = j;
-                        break;
-                    }
-                }
-
-                if (rowIndex === -1) {
-                    rowIndex = target.rows.length;
-                    let row = target.insertRow();
-                    row.dataset.response_i = i;
-                    row.dataset.response = responses[i].response;
-                    row.dataset.percent = percent;
-                    row.dataset.row_i = rowIndex;
-                    row.dataset.count = responses[i].count;
-                    row.classList.add('selected-vote-option');
-                    if (percent < 15) {
-                        row.classList.add('outside');
-                    }
-
-                    const countHtml = '<span id="' + name + '_count_' + rowIndex + '">' + responses[i].count + '</span>';
-                    let responseCell = row.insertCell(0);
-                    responseCell.onclick = function() {
-                        $(this).parent().toggleClass('selected-vote-option');
-                    };
-
-                    let barCell = row.insertCell(1);
-                    barCell.classList.add('bar');
-                    barCell.id = name + '_bar_' + rowIndex;
-                    barCell.innerHTML = '<div style="width:' + percent + '%;">' + countHtml + '</div>';
-
-                    const latexId = name + '_latex_' + rowIndex;
-                    responseCell.innerHTML = '<span id="' + latexId + '"></span>';
-                    Quiz.addMathjaxElement($('#' + latexId), responses[i].response);
-                    if (responses[i].qtype === 'stack') {
-                        Quiz.renderMaximaEquation(responses[i].response, latexId);
-                    }
-                } else {
-                    let currentRow = target.rows[currentRowIndex];
-                    currentRow.dataset.row_i = rowIndex;
-                    currentRow.dataset.response_i = i;
-                    currentRow.dataset.percent = percent;
-                    currentRow.dataset.count = responses[i].count;
-                    const containsOutside = currentRow.classList.contains('outside');
-                    if (percent > 15 && containsOutside) {
-                        currentRow.classList.remove('outside');
-                    } else if (percent < 15 && !containsOutside) {
-                        currentRow.classList.add('outside');
-                    }
-                    let countElement = document.getElementById(name + '_count_' + rowIndex);
-                    if (countElement !== null) {
-                        countElement.innerHTML = responses[i].count;
-                    }
-                    let barElement = document.getElementById(name + '_bar_' + rowIndex);
-                    if (barElement !== null) {
-                        barElement.firstElementChild.style.width = percent + '%';
-                    }
-                }
+                this.addBarGraphRow(target, name, responses[i], i, highestResponseCount);
             }
         }
 
@@ -810,8 +807,7 @@ define(['jquery', 'mod_jazzquiz/core'], function($, Jazz) {
         runVoting() {
             const options = Instructor.getSelectedAnswersForVote();
             const data = {questions: encodeURIComponent(JSON.stringify(options))};
-            // eslint-disable-next-line no-return-assign
-            Ajax.post('run_voting', data, () => {});
+            Ajax.post('run_voting', data);
         }
 
         /**
diff --git a/amd/src/student.js b/amd/src/student.js
index e148218..5078f40 100755
--- a/amd/src/student.js
+++ b/amd/src/student.js
@@ -93,21 +93,9 @@ define(['jquery', 'mod_jazzquiz/core'], function($, Jazz) {
             this.quiz.question.isVoteRunning = true;
         }
 
-        onStateChange() {
-
-        }
-
-        onQuestionTimerEnding() {
-
-        }
-
         onTimerTick(timeLeft) {
             setText(Question.timer, 'question_will_end_in_x_seconds', 'jazzquiz', timeLeft);
         }
-        // eslint-disable-next-line no-unused-vars
-        onQuestionRefreshed(data) {
-
-        }
 
         /**
          * Submit answer for the current question.
diff --git a/backup/moodle2/backup_jazzquiz_activity_task.class.php b/backup/moodle2/backup_jazzquiz_activity_task.class.php
index 11107dd..f9badac 100644
--- a/backup/moodle2/backup_jazzquiz_activity_task.class.php
+++ b/backup/moodle2/backup_jazzquiz_activity_task.class.php
@@ -20,6 +20,10 @@
 
 /**
  * Backup task that provides all the settings and steps to perform one complete backup.
+ *
+ * @package   mod_jazzquiz
+ * @copyright 2024 NTNU
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class backup_jazzquiz_activity_task extends backup_activity_task {
 
diff --git a/backup/moodle2/backup_jazzquiz_stepslib.php b/backup/moodle2/backup_jazzquiz_stepslib.php
index 3eec4dd..4de7091 100644
--- a/backup/moodle2/backup_jazzquiz_stepslib.php
+++ b/backup/moodle2/backup_jazzquiz_stepslib.php
@@ -14,14 +14,21 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-defined('MOODLE_INTERNAL') || die();
-
 /**
  * Define the complete choice structure for backup, with file and id annotations.
+ *
+ * @package   mod_jazzquiz
+ * @copyright 2024 NTNU
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class backup_jazzquiz_activity_structure_step extends backup_questions_activity_structure_step {
 
-    protected function define_structure() {
+    /**
+     * Defines the structure of the backup element.
+     *
+     * @return backup_nested_element
+     */
+    protected function define_structure(): backup_nested_element {
 
         // To know if we are including userinfo.
         $userinfo = $this->get_setting_value('userinfo');
@@ -36,14 +43,14 @@ protected function define_structure() {
             'defaultquestiontime',
             'waitforquestiontime',
             'cfganonymity',
-            'cfgallowguests'
+            'cfgallowguests',
         ]);
 
         $questions = new backup_nested_element('questions');
         $question = new backup_nested_element('question', ['id'], [
             'questionid',
             'questiontime',
-            'slot'
+            'slot',
         ]);
 
         $sessions = new backup_nested_element('sessions');
@@ -57,7 +64,7 @@ protected function define_structure() {
             'nextstarttime',
             'created',
             'anonymity',
-            'allowguests'
+            'allowguests',
         ]);
 
         $sessionquestions = new backup_nested_element('sessionquestions');
@@ -65,7 +72,7 @@ protected function define_structure() {
             'sessionid',
             'questionid',
             'questiontime',
-            'slot'
+            'slot',
         ]);
 
         $attempts = new backup_nested_element('attempts');
@@ -79,7 +86,7 @@ protected function define_structure() {
             'timestart',
             'timefinish',
             'timemodified',
-            'guestsession'
+            'guestsession',
         ]);
         $this->add_question_usages($attempt, 'questionengid');
 
@@ -89,7 +96,7 @@ protected function define_structure() {
             'slot',
             'ordernum',
             'original',
-            'merged'
+            'merged',
         ]);
 
         $votes = new backup_nested_element('votes');
@@ -100,14 +107,14 @@ protected function define_structure() {
             'finalcount',
             'userlist',
             'qtype',
-            'slot'
+            'slot',
         ]);
 
         $attendances = new backup_nested_element('attendances');
         $attendance = new backup_nested_element('attendance', ['id'], [
             'sessionid',
             'userid',
-            'numresponses'
+            'numresponses',
         ]);
 
         // Build the tree.
@@ -140,7 +147,7 @@ protected function define_structure() {
             $merge->set_source_table('jazzquiz_merges', ['sessionid' => backup::VAR_PARENTID]);
             $vote->set_source_table('jazzquiz_votes', [
                 'jazzquizid' => backup::VAR_ACTIVITYID,
-                'sessionid' => backup::VAR_PARENTID
+                'sessionid' => backup::VAR_PARENTID,
             ]);
         }
 
diff --git a/backup/moodle2/restore_jazzquiz_activity_task.class.php b/backup/moodle2/restore_jazzquiz_activity_task.class.php
index 1d82d86..1a0af26 100644
--- a/backup/moodle2/restore_jazzquiz_activity_task.class.php
+++ b/backup/moodle2/restore_jazzquiz_activity_task.class.php
@@ -19,8 +19,11 @@
 require_once($CFG->dirroot . '/mod/jazzquiz/backup/moodle2/restore_jazzquiz_stepslib.php');
 
 /**
- * JazzQuiz restore task that provides all the settings and steps to perform one
- * complete restore of the activity
+ * JazzQuiz restore task that provides all the settings and steps to perform one complete restore of the activity.
+ *
+ * @package   mod_jazzquiz
+ * @copyright 2024 NTNU
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class restore_jazzquiz_activity_task extends restore_activity_task {
 
@@ -34,40 +37,48 @@ protected function define_my_settings() {
     /**
      * Define the structure steps.
      */
-    protected function define_my_steps() {
+    protected function define_my_steps(): void {
         $this->add_step(new restore_jazzquiz_activity_structure_step('jazzquiz_structure', 'jazzquiz.xml'));
     }
 
     /**
+     * Define decode contents.
+     *
      * @return restore_decode_content[]
      */
-    public static function define_decode_contents() {
+    public static function define_decode_contents(): array {
         return [
-            new restore_decode_content('jazzquiz', ['intro'])
+            new restore_decode_content('jazzquiz', ['intro']),
         ];
     }
 
     /**
+     * Define decode rules.
+     *
      * @return restore_decode_rule[]
      */
-    public static function define_decode_rules() {
+    public static function define_decode_rules(): array {
         return [
             new restore_decode_rule('JAZZQUIZVIEWBYID', '/mod/jazzquiz/view.php?id=$1', 'course_module'),
-            new restore_decode_rule('JAZZQUIZINDEX', '/mod/jazzquiz/index.php?id=$1', 'course')
+            new restore_decode_rule('JAZZQUIZINDEX', '/mod/jazzquiz/index.php?id=$1', 'course'),
         ];
     }
 
     /**
+     * Define restore log rules.
+     *
      * @return restore_log_rule[]
      */
-    public static function define_restore_log_rules() {
+    public static function define_restore_log_rules(): array {
         return [];
     }
 
     /**
+     * Define restore log rules for course.
+     *
      * @return restore_log_rule[]
      */
-    public static function define_restore_log_rules_for_course() {
+    public static function define_restore_log_rules_for_course(): array {
         return [];
     }
 
diff --git a/backup/moodle2/restore_jazzquiz_stepslib.php b/backup/moodle2/restore_jazzquiz_stepslib.php
index 57f5cf3..9761596 100644
--- a/backup/moodle2/restore_jazzquiz_stepslib.php
+++ b/backup/moodle2/restore_jazzquiz_stepslib.php
@@ -14,16 +14,24 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-defined('MOODLE_INTERNAL') || die();
-
+/**
+ * Restore Jazzquiz from backup.
+ *
+ * @package   mod_jazzquiz
+ * @copyright 2024 NTNU
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 class restore_jazzquiz_activity_structure_step extends restore_questions_activity_structure_step {
 
+    /** @var stdClass Attempt record for inform_new_usage_id */
+    private stdClass $currentattempt;
+
     /**
-     * @var \stdClass for inform_new_usage_id
+     * Define the structure of the restore element.
+     *
+     * @return restore_path_element[]
      */
-    private $currentattempt;
-
-    protected function define_structure() {
+    protected function define_structure(): array {
         $userinfo = $this->get_setting_value('userinfo');
         $paths = [];
         $paths[] = new restore_path_element('jazzquiz', '/activity/jazzquiz');
@@ -48,7 +56,13 @@ protected function define_structure() {
         return $this->prepare_activity_structure($paths);
     }
 
-    protected function process_jazzquiz($data) {
+    /**
+     * Process activity record.
+     *
+     * @param stdClass|array $data
+     * @return void
+     */
+    protected function process_jazzquiz(stdClass|array $data): void {
         global $DB;
         $data = (object)$data;
         $data->course = $this->get_courseid();
@@ -58,7 +72,13 @@ protected function process_jazzquiz($data) {
         $this->apply_activity_instance($newitemid);
     }
 
-    protected function process_jazzquiz_question($data) {
+    /**
+     * Process question record.
+     *
+     * @param stdClass|array $data
+     * @return void
+     */
+    protected function process_jazzquiz_question(stdClass|array $data): void {
         global $DB;
         $data = (object)$data;
         $oldid = $data->id;
@@ -71,7 +91,13 @@ protected function process_jazzquiz_question($data) {
         $this->set_mapping('jazzquiz_question', $oldid, $newitemid);
     }
 
-    protected function process_jazzquiz_session($data) {
+    /**
+     * Process session record.
+     *
+     * @param stdClass|array $data
+     * @return void
+     */
+    protected function process_jazzquiz_session(stdClass|array $data): void {
         global $DB;
         $data = (object)$data;
         $oldid = $data->id;
@@ -81,7 +107,13 @@ protected function process_jazzquiz_session($data) {
         $this->set_mapping('jazzquiz_session', $oldid, $newitemid);
     }
 
-    protected function process_jazzquiz_attempt($data) {
+    /**
+     * Process attempt record.
+     *
+     * @param stdClass|array $data
+     * @return void
+     */
+    protected function process_jazzquiz_attempt(stdClass|array $data): void {
         $data = (object)$data;
         $data->sessionid = $this->get_new_parentid('jazzquiz_session');
         $data->userid = $this->get_mappingid('user', $data->userid);
@@ -91,7 +123,13 @@ protected function process_jazzquiz_attempt($data) {
         $this->currentattempt = clone($data);
     }
 
-    protected function inform_new_usage_id($newusageid) {
+    /**
+     * Process question usage for attempt record currently being processed.
+     *
+     * @param int $newusageid
+     * @return void
+     */
+    protected function inform_new_usage_id($newusageid): void {
         global $DB;
         $data = $this->currentattempt;
         $oldid = $data->id;
@@ -100,7 +138,13 @@ protected function inform_new_usage_id($newusageid) {
         $this->set_mapping('jazzquiz_attempt', $oldid, $newitemid);
     }
 
-    protected function process_jazzquiz_session_question($data) {
+    /**
+     * Process session question record.
+     *
+     * @param stdClass|array $data
+     * @return void
+     */
+    protected function process_jazzquiz_session_question(stdClass|array $data): void {
         global $DB;
         $data = (object)$data;
         $data->sessionid = $this->get_new_parentid('jazzquiz_session');
@@ -113,7 +157,13 @@ protected function process_jazzquiz_session_question($data) {
         $this->set_mapping('jazzquiz_session_question', $oldid, $newitemid);
     }
 
-    protected function process_jazzquiz_merge($data) {
+    /**
+     * Process merge record.
+     *
+     * @param stdClass|array $data
+     * @return void
+     */
+    protected function process_jazzquiz_merge(stdClass|array $data): void {
         global $DB;
         $data = (object)$data;
         $oldid = $data->id;
@@ -122,7 +172,13 @@ protected function process_jazzquiz_merge($data) {
         $this->set_mapping('jazzquiz_merge', $oldid, $newitemid);
     }
 
-    protected function process_jazzquiz_vote($data) {
+    /**
+     * Process vote record.
+     *
+     * @param stdClass|array $data
+     * @return void
+     */
+    protected function process_jazzquiz_vote(stdClass|array $data): void {
         global $DB;
         $data = (object)$data;
         $oldid = $data->id;
@@ -132,7 +188,13 @@ protected function process_jazzquiz_vote($data) {
         $this->set_mapping('jazzquiz_vote', $oldid, $newitemid);
     }
 
-    protected function process_jazzquiz_attendance($data) {
+    /**
+     * Process attendance record.
+     *
+     * @param stdClass|array $data
+     * @return void
+     */
+    protected function process_jazzquiz_attendance(stdClass|array $data): void {
         global $DB;
         $data = (object)$data;
         $oldid = $data->id;
@@ -142,7 +204,12 @@ protected function process_jazzquiz_attendance($data) {
         $this->set_mapping('jazzquiz_attendance', $oldid, $newitemid);
     }
 
-    protected function after_execute() {
+    /**
+     * After execute.
+     *
+     * @return void
+     */
+    protected function after_execute(): void {
         $this->add_related_files('mod_jazzquiz', 'intro', null);
     }
 
diff --git a/classes/bank/add_questions_bank_view.php b/classes/bank/add_questions_bank_view.php
new file mode 100644
index 0000000..f6568a6
--- /dev/null
+++ b/classes/bank/add_questions_bank_view.php
@@ -0,0 +1,56 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Question bank view for managing JazzQuiz questions.
+ *
+ * @package mod_jazzquiz
+ * @copyright 2024 NTNU
+ * @author Sebastian Gundersen <sebastian@sgundersen.com>
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_jazzquiz\bank;
+
+use context;
+
+/**
+ * Displays button at the bottom of the question bank view for adding selected questions to a JazzQuiz.
+ *
+ * @package mod_jazzquiz
+ * @copyright 2024 NTNU
+ * @author Sebastian Gundersen <sebastian@sgundersen.com>
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class add_questions_bank_view extends \core_question\local\bank\view {
+
+    /**
+     * Display button to add selected questions to the quiz.
+     *
+     * @param context $catcontext
+     * @return void
+     */
+    protected function display_bottom_controls(context $catcontext): void {
+        echo '<div class="pt-2">';
+        if (has_capability('moodle/question:useall', $catcontext)) {
+            echo '<button class="btn btn-primary jazzquiz-add-selected-questions">';
+            echo get_string('addselectedquestionstoquiz', 'quiz');
+            echo '</button>';
+        }
+        echo '</div>';
+    }
+
+}
diff --git a/classes/bank/jazzquiz_question_bank_view.php b/classes/bank/jazzquiz_question_bank_view.php
deleted file mode 100755
index 043130d..0000000
--- a/classes/bank/jazzquiz_question_bank_view.php
+++ /dev/null
@@ -1,213 +0,0 @@
-<?php
-// This file is part of Moodle - http://moodle.org/
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Moodle is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-
-/**
- * Defines the class for rendering the question bank for the edit page.
- *
- * @package     mod_jazzquiz
- * @author      John Hoopes <moodle@madisoncreativeweb.com>
- * @copyright   2014 University of Wisconsin - Madison
- * @copyright   2018 NTNU
- * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
-namespace mod_jazzquiz\bank;
-
-defined('MOODLE_INTERNAL') || die();
-
-use \core_question\bank\search\tag_condition as tag_condition;
-use \core_question\bank\search\hidden_condition as hidden_condition;
-use \core_question\bank\search\category_condition as category_condition;
-
-/**
- * Subclass of the question bank view class to change the way it works/looks
- *
- * @package     mod_jazzquiz
- * @author      John Hoopes <moodle@madisoncreativeweb.com>
- * @copyright   2014 University of Wisconsin - Madison
- * @copyright   2018 NTNU
- * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-class jazzquiz_question_bank_view extends \core_question\local\bank\view {
-
-    /**
-     * Define the columns we want to be displayed on the question bank
-     * @return array
-     */
-    protected function wanted_columns(): array {
-        // Full class names for question bank columns.
-        $columns = [
-            '\\mod_jazzquiz\\bank\\question_bank_add_to_jazzquiz_action_column',
-            'core_question\\local\\bank\\checkbox_column',
-            'qbank_viewquestiontype\\question_type_column',
-            'qbank_viewquestionname\\viewquestionname_column_helper',
-            'qbank_previewquestion\\preview_action_column',
-        ];
-
-        // Needs to check qbshowtext parameter manually from baseurl in order
-        // to determine whether to display the question text row below questions
-        $queryparams = explode(';', $this->baseurl);
-        
-        foreach ($queryparams as $value) {
-            $value = str_replace('&', '', $value);
-            $value = str_replace('amp', '', $value);
-            $param = explode('=', $value);
-
-            if ($param[0] == 'qbshowtext') {
-                if ((int)$param[1] != 0) {
-                    array_push($columns, 'qbank_viewquestiontext\\question_text_row');
-                }
-                break;
-            }
-        } 
-
-
-
-        foreach ($columns as $column) {
-            $this->requiredcolumns[$column] = new $column($this);
-        }
-        return $this->requiredcolumns;
-    }
-
-    /**
-     * Shows the question bank editing interface.
-     * @param string $tabname
-     * @param array $pagevars
-     * @throws \coding_exception
-     */
-    public function display($pagevars, $tabname): void {
-        $page = $pagevars['qpage'];
-        $perpage = $pagevars['qperpage'];
-        $cat = $pagevars['cat'];
-        $recurse = $pagevars['recurse'];
-        $showhidden = $pagevars['showhidden'];
-        $showquestiontext = $pagevars['qbshowtext'];
-        $tagids = [];
-        if (!empty($pagevars['qtagids'])) {
-            $tagids = $pagevars['qtagids'];
-        }
-
-        global $PAGE;
-
-        $contexts = $this->contexts->having_one_edit_tab_cap($tabname);
-        list($categoryid, $contextid) = explode(',', $cat);
-        $catcontext = \context::instance_by_id($contextid);
-        $thiscontext = $this->get_most_specific_context();
-
-        // Category selection form.
-        $this->display_question_bank_header();
-        array_unshift($this->searchconditions, new tag_condition([$catcontext, $thiscontext], $tagids));
-        array_unshift($this->searchconditions, new hidden_condition(!$showhidden));
-        array_unshift($this->searchconditions, new category_condition($cat, $recurse, $contexts, $this->baseurl, $this->course));
-        $this->display_options_form($showquestiontext, '/mod/jazzquiz/edit.php');
-
-        // Continues with list of questions.
-        $this->display_question_list(
-            $this->baseurl,
-            $cat,
-            null,
-            $page,
-            $perpage,
-            $this->contexts->having_cap('moodle/question:add')
-        );
-        $this->display_add_selected_questions_button();
-        $PAGE->requires->js_call_amd('core_question/edit_tags', 'init', ['#questionscontainer']);
-    }
-
-    private function display_add_selected_questions_button() {
-        $straddtoquiz = get_string('add_to_quiz', 'jazzquiz');
-        echo 
-            '<br/>
-            <button class="btn btn-secondary jazzquiz-add-selected-questions">' . $straddtoquiz . '</button>
-            <i class="icon fa fa-question-circle text-info fa-fw " 
-                title="Add selected questions to the quiz" 
-                role="img" aria-label="Add selected questions to the quiz">
-            </i>';
-    }
-
-    /**
-     * Generate an "add to quiz" url so that when clicked the question will be added to the quiz
-     * @param int $questionid
-     * @return \moodle_url Moodle url to add the question
-     * @throws \moodle_exception
-     */
-    public function get_add_to_jazzquiz_url($questionid) {
-        $params = $this->baseurl->params();
-        $params['questionids'] = $questionid;
-        $params['action'] = 'addquestion';
-        $params['sesskey'] = sesskey();
-        return new \moodle_url('/mod/jazzquiz/edit.php', $params);
-    }
-
-    /**
-     * This has been taken from the base class to allow us to call our own version of
-     * create_new_question_button.
-     * @param \stdClass $category
-     * @param bool $add
-     * @throws \coding_exception
-     * @throws \moodle_exception
-     */
-    protected function create_new_question_form($category, $add): void {
-        echo '<div class="createnewquestion">';
-        if ($add) {
-            $caption = get_string('create_new_question', 'jazzquiz');
-            $this->create_new_question_button($category->id, $this->editquestionurl->params(), $caption);
-        } else {
-            print_string('nopermissionadd', 'question');
-        }
-        echo '</div>';
-    }
-
-    /**
-     * Print a button for creating a new question. This will open question/addquestion.php,
-     * which in turn goes to question/question.php before getting back to $params['returnurl']
-     * (by default the question bank screen).
-     *
-     * This has been taken from question/editlib.php and adapted to allow us to use the $allowedqtypes
-     * param on print_choose_qtype_to_add_form
-     *
-     * @param int $categoryid The id of the category that the new question should be added to.
-     * @param array $params Other parameters to add to the URL. You need either $params['cmid'] or
-     *      $params['courseid'], and you should probably set $params['returnurl']
-     * @param string $caption the text to display on the button.
-     * @param string $tooltip a tooltip to add to the button (optional).
-     * @param bool $disabled if true, the button will be disabled.
-     * @throws \moodle_exception
-     */
-    private function create_new_question_button($categoryid, $params, $caption, $tooltip = '', $disabled = false) {
-        global $OUTPUT;
-
-        $params['category'] = $categoryid;
-        $url = new \moodle_url('/question/addquestion.php', $params);
-
-        echo $OUTPUT->single_button($url, $caption, 'get', [
-            'disabled' => $disabled,
-            'title' => $tooltip
-        ]);
-
-        static $choiceformprinted = false;
-        if (!$choiceformprinted) {
-            echo '<div id="qtypechoicecontainer">';
-            echo print_choose_qtype_to_add_form([]);
-            echo "</div>\n";
-            $choiceformprinted = true;
-        }
-
-        // Add some top margin to the table (not viable via CSS).
-        echo '<br><br>';
-    }
-
-}
diff --git a/classes/bank/question_bank_add_to_jazzquiz_action_column.php b/classes/bank/question_bank_add_to_jazzquiz_action_column.php
deleted file mode 100755
index e6a501f..0000000
--- a/classes/bank/question_bank_add_to_jazzquiz_action_column.php
+++ /dev/null
@@ -1,68 +0,0 @@
-<?php
-// This file is part of Moodle - http://moodle.org/
-//
-// Moodle is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// Moodle is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
-
-/**
- * Defines table column class for adding a question from the question bank to a JazzQuiz.
- * @package     mod_jazzquiz
- * @author      John Hoopes <moodle@madisoncreativeweb.com>
- * @copyright   2014 University of Wisconsin - Madison
- * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-
-namespace mod_jazzquiz\bank;
-
-defined('MOODLE_INTERNAL') || die();
-
-/**
- * Custom action column for adding a question to the JazzQuiz from the question bank view
- *
- * @package     mod_jazzquiz
- * @author      John Hoopes <moodle@madisoncreativeweb.com>
- * @copyright   2014 University of Wisconsin - Madison
- * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-class question_bank_add_to_jazzquiz_action_column extends \core_question\local\bank\action_column_base {
-
-    /**
-     * Get the name of the column.
-     * @return string
-     */
-    public function get_name() {
-        return 'addtojazzquizaction';
-    }
-
-    /**
-     * Show the button to add the question.
-     * @param object $question
-     * @param string $rowclasses
-     */
-    protected function display_content($question, $rowclasses) {
-        if (!question_has_capability_on($question, 'use')) {
-            return;
-        }
-        $text = get_string('add_to_quiz', 'jazzquiz');
-        $this->print_icon('t/add', $text, $this->qbank->get_add_to_jazzquiz_url($question->id));
-    }
-
-    /**
-     * Get the required fields.
-     * @return string[]
-     */
-    public function get_required_fields(): array {
-        return ['q.id'];
-    }
-
-}
diff --git a/classes/exporter.php b/classes/exporter.php
index b7a379c..2aa47a7 100755
--- a/classes/exporter.php
+++ b/classes/exporter.php
@@ -16,9 +16,9 @@
 
 namespace mod_jazzquiz;
 
-defined('MOODLE_INTERNAL') || die;
-
 /**
+ * Exports session data.
+ *
  * @package   mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastian@sgundersen.com>
  * @copyright 2018 NTNU
@@ -28,10 +28,11 @@ class exporter {
 
     /**
      * Escape the characters used for structuring the CSV contents.
+     *
      * @param string $text
      * @return string
      */
-    public static function escape_csv(string $text) : string {
+    public static function escape_csv(string $text): string {
         $text = str_replace("\r", '', $text);
         $text = str_replace("\n", '', $text);
         $text = str_replace("\t", '    ', $text);
@@ -40,20 +41,22 @@ public static function escape_csv(string $text) : string {
 
     /**
      * Sets header to download csv file of given filename.
+     *
      * @param string $name filename without extension
      */
-    private function csv_file(string $name) {
+    private function csv_file(string $name): void {
         header("Content-Disposition: attachment; filename=$name.csv");
         echo "sep=\t\r\n";
     }
 
     /**
      * Export session data to array.
+     *
      * @param jazzquiz_session $session
      * @param jazzquiz_attempt[] $quizattempts
      * @return array
      */
-    public function export_session(jazzquiz_session $session, array $quizattempts) : array {
+    public function export_session(jazzquiz_session $session, array $quizattempts): array {
         $quizattempt = reset($quizattempts);
         $qubaslots = $quizattempt->quba->get_slots();
         $slots = [];
@@ -64,12 +67,12 @@ public function export_session(jazzquiz_session $session, array $quizattempts) :
             $slots[$slot] = [
                 'name' => $question->name,
                 'qtype' => $qtype,
-                'responses' => []
+                'responses' => [],
             ];
         }
         $users = [];
         foreach ($quizattempts as $quizattempt) {
-            if ($quizattempt->data->status == jazzquiz_attempt::PREVIEW) {
+            if ($quizattempt->status == jazzquiz_attempt::PREVIEW) {
                 continue;
             }
             $answers = [];
@@ -77,8 +80,8 @@ public function export_session(jazzquiz_session $session, array $quizattempts) :
                 $answers[$slot] = $quizattempt->get_response_data($slot);
             }
             $users[] = [
-                'name' => $session->user_name_for_answer($quizattempt->data->userid),
-                'answers' => $answers
+                'name' => $session->user_name_for_answer($quizattempt->userid),
+                'answers' => $answers,
             ];
         }
         $name = 'session_' . $session->data->id . '_' . $session->data->name;
@@ -87,10 +90,11 @@ public function export_session(jazzquiz_session $session, array $quizattempts) :
 
     /**
      * Export and print session data as CSV.
+     *
      * @param jazzquiz_session $session
      * @param jazzquiz_attempt[] $attempts
      */
-    public function export_session_csv(jazzquiz_session $session, array $attempts) {
+    public function export_session_csv(jazzquiz_session $session, array $attempts): void {
         list($name, $slots, $users) = $this->export_session($session, $attempts);
         $this->csv_file($name);
         // Header row.
@@ -115,12 +119,13 @@ public function export_session_csv(jazzquiz_session $session, array $attempts) {
 
     /**
      * Export session question data to array.
+     *
      * @param jazzquiz_session $session
      * @param jazzquiz_attempt $attempt
      * @param int $slot
      * @return array
      */
-    public function export_session_question(jazzquiz_session $session, jazzquiz_attempt $attempt, int $slot) : array {
+    public function export_session_question(jazzquiz_session $session, jazzquiz_attempt $attempt, int $slot): array {
         $qattempt = $attempt->quba->get_question_attempt($slot);
         $question = $qattempt->get_question();
         $session->load_attempts();
@@ -132,11 +137,12 @@ public function export_session_question(jazzquiz_session $session, jazzquiz_atte
 
     /**
      * Export and print session question data as CSV.
+     *
      * @param jazzquiz_session $session
      * @param jazzquiz_attempt $attempt
      * @param int $slot
      */
-    public function export_session_question_csv(jazzquiz_session $session, jazzquiz_attempt $attempt, int $slot) {
+    public function export_session_question_csv(jazzquiz_session $session, jazzquiz_attempt $attempt, int $slot): void {
         list($name, $text, $responses) = $this->export_session_question($session, $attempt, $slot);
         $this->csv_file($name);
         echo "$text\r\n";
@@ -147,9 +153,10 @@ public function export_session_question_csv(jazzquiz_session $session, jazzquiz_
 
     /**
      * Export and print session attendance data as CSV.
+     *
      * @param jazzquiz_session $session
      */
-    public function export_attendance_csv(jazzquiz_session $session) {
+    public function export_attendance_csv(jazzquiz_session $session): void {
         $name = $session->data->id . '_' . $session->data->name;
         $attendances = $session->get_attendances();
         $this->csv_file("session_{$name}_attendance");
diff --git a/classes/forms/edit/add_question_form.php b/classes/forms/edit/add_question_form.php
index 981ab7e..267963e 100755
--- a/classes/forms/edit/add_question_form.php
+++ b/classes/forms/edit/add_question_form.php
@@ -29,8 +29,7 @@
 require_once($CFG->libdir . '/formslib.php');
 
 /**
- * Moodle form for confirming question add and get the time for the question
- * to appear on the page.
+ * Moodle form for confirming question add and get the time for the question to appear on the page.
  *
  * @package     mod_jazzquiz
  * @author      John Hoopes <moodle@madisoncreativeweb.com>
@@ -40,19 +39,19 @@
 class add_question_form extends \moodleform {
 
     /**
-     * Overriding parent function to account for namespace in the class name
-     * so that client validation works
-     * @return mixed|string
+     * Aaccount for namespace in the class name such that client validation works.
+     *
+     * @return string
      */
-    protected function get_form_identifier() {
+    protected function get_form_identifier(): string {
         $class = get_class($this);
         return preg_replace('/[^a-z0-9_]/i', '_', $class);
     }
 
     /**
-     * Adds form fields to the form
+     * Adds form fields to the form.
      */
-    public function definition() {
+    public function definition(): void {
         $mform = $this->_form;
         $jazzquiz = $this->_customdata['jazzquiz'];
         $defaulttime = $jazzquiz->data->defaultquestiontime;
@@ -80,12 +79,13 @@ public function definition() {
     }
 
     /**
-     * Validate question time
+     * Validate question time.
+     *
      * @param array $data
      * @param array $files
      * @return array $errors
      */
-    public function validation($data, $files) {
+    public function validation($data, $files): array {
         $errors = [];
         if (!filter_var($data['questiontime'], FILTER_VALIDATE_INT) && $data['questiontime'] !== 0) {
             $errors['questiontime'] = get_string('invalid_question_time', 'jazzquiz');
diff --git a/classes/forms/view/start_session.php b/classes/forms/view/start_session.php
index a7f6bd2..97b3b92 100755
--- a/classes/forms/view/start_session.php
+++ b/classes/forms/view/start_session.php
@@ -25,6 +25,8 @@
 
 namespace mod_jazzquiz\forms\view;
 
+use moodleform;
+
 defined('MOODLE_INTERNAL') || die();
 
 require_once($CFG->libdir . '/formslib.php');
@@ -39,23 +41,23 @@
  * @copyright 2019 NTNU
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class start_session extends \moodleform {
+class start_session extends moodleform {
 
     /**
      * Overriding parent function to account for namespace in the class name
-     * so that client validation works
+     * so that client validation works.
      *
-     * @return mixed|string
+     * @return string
      */
-    protected function get_form_identifier() {
+    protected function get_form_identifier(): string {
         $class = get_class($this);
         return preg_replace('/[^a-z0-9_]/i', '_', $class);
     }
 
     /**
-     * Definition of the session start form
+     * Definition of the session start form.
      */
-    public function definition() {
+    public function definition(): void {
         $mform = $this->_form;
         $jazzquiz = $this->_customdata['jazzquiz'];
         $mform->addElement('text', 'session_name', get_string('session_name', 'jazzquiz'));
@@ -64,7 +66,7 @@ public function definition() {
         $anonymity = [
             $mform->createElement('radio', 'anonymity', '', get_string('anonymous_answers', 'jazzquiz'), 1, []),
             $mform->createElement('radio', 'anonymity', '', get_string('fully_anonymous', 'jazzquiz'), 2, []),
-            $mform->createElement('radio', 'anonymity', '', get_string('nonanonymous_session', 'jazzquiz'), 3, [])
+            $mform->createElement('radio', 'anonymity', '', get_string('nonanonymous_session', 'jazzquiz'), 3, []),
         ];
         $mform->addGroup($anonymity, 'anonymity', '', ['<br>', ''], false);
         $mform->setDefault('anonymity', $jazzquiz->data->cfganonymity);
@@ -74,14 +76,13 @@ public function definition() {
     }
 
     /**
-     * Peform validation on the form
+     * Peform validation on the form.
      *
      * @param array $data
      * @param array $files
-     *
-     * @return string[] $errors array of errors
+     * @return string[] errors
      */
-    public function validations($data, $files) {
+    public function validations($data, $files): array {
         $errors = [];
         if (empty($data['session_name'])) {
             $errors['session_name'] = get_string('session_name_required', 'jazzquiz');
diff --git a/classes/forms/view/student_start_form.php b/classes/forms/view/student_start_form.php
index c56ec2b..781f127 100755
--- a/classes/forms/view/student_start_form.php
+++ b/classes/forms/view/student_start_form.php
@@ -20,10 +20,8 @@
 
 require_once($CFG->libdir . '/formslib.php');
 
-
 /**
- * Student start form to display the group to use if they have more than one
- * to start their session attempt
+ * Student start form to display the group to use if they have more than one to start their session attempt.
  *
  * @package     mod_jazzquiz
  * @author      John Hoopes <moodle@madisoncreativeweb.com>
@@ -33,18 +31,17 @@
 class student_start_form extends \moodleform {
 
     /**
-     * Overriding parent function to account for namespace in the class name
-     * so that client validation works
+     * Account for namespace in the class name such that client validation works.
      *
-     * @return mixed|string
+     * @return string
      */
-    protected function get_form_identifier() {
+    protected function get_form_identifier(): string {
         $class = get_class($this);
         return preg_replace('/[^a-z0-9_]/i', '_', $class);
     }
 
     /**
-     * Form definition
+     * Form definition.
      */
     protected function definition() {
         $mform = $this->_form;
@@ -52,12 +49,13 @@ protected function definition() {
     }
 
     /**
-     * Validate student input
+     * Validate student input.
+     *
      * @param array $data
      * @param array $files
      * @return array $errors
      */
-    public function validation($data, $files) {
+    public function validation($data, $files): array {
         return [];
     }
 }
diff --git a/classes/improviser.php b/classes/improviser.php
index 98550c6..c9684c2 100755
--- a/classes/improviser.php
+++ b/classes/improviser.php
@@ -16,9 +16,13 @@
 
 namespace mod_jazzquiz;
 
-defined('MOODLE_INTERNAL') || die();
+use context_module;
+use core_question\local\bank\question_edit_contexts;
+use stdClass;
 
 /**
+ * Handles the improvisation aspect of JazzQuiz.
+ *
  * @package     mod_jazzquiz
  * @author      Sebastian S. Gundersen <sebastsg@stud.ntnu.no>
  * @copyright   2018 NTNU
@@ -26,10 +30,12 @@
  */
 class improviser {
 
-    /** @var jazzquiz $jazzquiz */
-    private $jazzquiz;
+    /** @var jazzquiz */
+    private jazzquiz $jazzquiz;
 
     /**
+     * Constructor.
+     *
      * @param jazzquiz $jazzquiz
      */
     public function __construct(jazzquiz $jazzquiz) {
@@ -38,10 +44,11 @@ public function __construct(jazzquiz $jazzquiz) {
 
     /**
      * Check whether a question type exists or not.
+     *
      * @param string $name Name of the question type
      * @return bool
      */
-    private function question_type_exists(string $name) : bool {
+    private function question_type_exists(string $name): bool {
         $qtypes = \core_plugin_manager::instance()->get_plugins_of_type('qtype');
         foreach ($qtypes as $qtype) {
             if ($qtype->name === $name) {
@@ -53,17 +60,15 @@ private function question_type_exists(string $name) : bool {
 
     /**
      * Get all the improvised question records in our activity's question category.
-     * @return \stdClass[]|false
+     *
+     * @return stdClass[]
      */
-    public function get_all_improvised_question_definitions() {
+    public function get_all_improvised_question_definitions(): array {
         global $DB;
         $questions = [];
-        $context = \context_module::instance($this->jazzquiz->cm->id);
-        $parts = explode('/', $context->path);
-        debugging( "get_all_improvised: ".$parts );
-        foreach ($parts as $part) {
+        $context = context_module::instance($this->jazzquiz->cm->id);
+        foreach (explode('/', $context->path) as $part) {
             // Selecting name first, to prevent duplicate improvise questions.
-            debugging( "get_all_improvised: ".$part );
             $sql = "SELECT q.name,
                            q.id
                       FROM {question} q
@@ -78,21 +83,25 @@ public function get_all_improvised_question_definitions() {
                        AND ctx.path LIKE :path
                      WHERE q.name LIKE :prefix
                   ORDER BY q.name";
-            $questions += $DB->get_records_sql($sql, ['prefix' => '{IMPROV}%', 'path' => '%/' . $part]);
+            $questions[] = $DB->get_records_sql($sql, [
+                'prefix' => '{IMPROV}%',
+                'path' => "%/$part",
+            ]);
         }
-        return $questions ? $questions : false;
+        return $questions;
     }
 
     /**
      * Get the specified question name is an improvisational question.
+     *
      * @param string $name The name of the improvised question without the prefix.
-     * @return \stdClass|false
+     * @return ?stdClass
      */
-    private function get_improvised_question_definition(string $name) {
+    private function get_improvised_question_definition(string $name): ?stdClass {
         global $DB;
         $category = $this->get_default_question_category();
         if (!$category) {
-            return false;
+            return null;
         }
         $sql = "SELECT qbe.id
                   FROM {question_bank_entries} qbe
@@ -101,32 +110,29 @@ private function get_improvised_question_definition(string $name) {
                  WHERE qbe.questioncategoryid = :catid
                    AND q.name LIKE :name";
         $questions = $DB->get_records_sql($sql, ['catid' => $category->id, 'name' => '{IMPROV}' . $name]);
-        if (!$questions) {
-            return false;
-        }
-        return reset($questions);
+        return empty($questions) ? null : reset($questions);
     }
 
     /**
      * Deletes the improvised question definition with matching name if it exists.
+     *
      * @param string $name of question
      */
-    private function delete_improvised_question(string $name) {
+    private function delete_improvised_question(string $name): void {
         $question = $this->get_improvised_question_definition($name);
-        if ($question !== false) {
+        if ($question !== null) {
             question_delete_question($question->id);
         }
     }
 
     /**
      * Returns the default question category for the activity.
-     * @return object
      */
-    private function get_default_question_category() {
-        $context = \context_module::instance($this->jazzquiz->cm->id);
+    private function get_default_question_category(): stdClass|bool|null {
+        $context = context_module::instance($this->jazzquiz->cm->id);
         $category = question_get_default_category($context->id);
         if (!$category) {
-            $contexts = new \core_question\local\bank\question_edit_contexts($context);
+            $contexts = new question_edit_contexts($context);
             $category = question_make_default_categories($contexts->all());
         }
         return $category;
@@ -134,16 +140,15 @@ private function get_default_question_category() {
 
     /**
      * Create a question bank entry for the database.
-     * @return \stdClass | null
+     *
+     * @return ?stdClass
      */
-    private function make_generic_question_bank_entry() {
+    private function make_generic_question_bank_entry(): ?stdClass {
         $category = $this->get_default_question_category();
         if (!$category) {
             return null;
         }
-
-        /* debugging( "Making generic question bank entry." ) ; */
-        $question = new \stdClass();
+        $question = new stdClass();
         $question->questioncategoryid = $category->id;
         $question->ownerid = null;
         $question->idnumber = null;
@@ -152,21 +157,20 @@ private function make_generic_question_bank_entry() {
 
     /**
      * Create a question database object.
+     *
      * @param string $qtype What question type to create
      * @param string $name The name of the question to create
-     * @return \stdClass | null
+     * @return ?stdClass
      */
-    private function make_generic_question_definition(string $qtype, string $name) {
+    private function make_generic_question_definition(string $qtype, string $name): ?stdClass {
         if (!$this->question_type_exists($qtype)) {
-            /* debugging( "make_generic_question_definition: question type does not exist" ) ; */
             return null;
         }
-        $existing = $this->get_improvised_question_definition($name);
-        if ($existing !== false) {
-            /* debugging( "make_generic_question_definition: existing: ".$name ) ; */
+        $existingdefinition = $this->get_improvised_question_definition($name);
+        if ($existingdefinition !== null) {
             return null;
         }
-        $question = new \stdClass();
+        $question = new stdClass();
         $question->parent = 0;
         $question->name = '{IMPROV}' . $name;
         $question->questiontext = '&nbsp;';
@@ -187,11 +191,12 @@ private function make_generic_question_definition(string $qtype, string $name) {
 
     /**
      * Create a multichoice options database object.
+     *
      * @param int $questionid The ID of the question to make options for
-     * @return \stdClass
+     * @return stdClass
      */
-    private function make_multichoice_options($questionid) {
-        $options = new \stdClass();
+    private function make_multichoice_options(int $questionid): stdClass {
+        $options = new stdClass();
         $options->questionid = $questionid;
         $options->layout = 0;
         $options->single = 1;
@@ -209,11 +214,12 @@ private function make_multichoice_options($questionid) {
 
     /**
      * Make a short answer question options database object.
+     *
      * @param int $questionid The ID of the question to make options for
-     * @return \stdClass
+     * @return stdClass
      */
-    private function make_shortanswer_options($questionid) {
-        $options = new \stdClass();
+    private function make_shortanswer_options(int $questionid): stdClass {
+        $options = new stdClass();
         $options->questionid = $questionid;
         $options->usecase = 0;
         return $options;
@@ -221,13 +227,14 @@ private function make_shortanswer_options($questionid) {
 
     /**
      * Make an answer for a question.
+     *
      * @param int $questionid The ID of the question to make the answer for
      * @param string $format Which format the answer has
      * @param string $answertext The answer text
-     * @return \stdClass
+     * @return stdClass
      */
-    private function make_generic_question_answer($questionid, string $format, string $answertext) {
-        $answer = new \stdClass();
+    private function make_generic_question_answer(int $questionid, string $format, string $answertext): stdClass {
+        $answer = new stdClass();
         $answer->question = $questionid;
         $answer->answer = $answertext;
         $answer->answerformat = $format;
@@ -239,24 +246,23 @@ private function make_generic_question_answer($questionid, string $format, strin
 
     /**
      * Insert a multichoice question to the database.
+     *
      * @param string $name The name of the question
      * @param string[] $answers Answers to the question
      */
-    private function insert_multichoice_question_definition(string $name, array $answers) {
+    private function insert_multichoice_question_definition(string $name, array $answers): void {
         global $DB;
-        /* debugging("insert_multichoice_question_definition: ".$name ) ; */
         $question = $this->make_generic_question_definition('multichoice', $name);
         if (!$question) {
             return;
         }
-        /* debugging("insert_multichoice_question_definition 2") ; */
         $qbankentry = $this->make_generic_question_bank_entry();
         if (!$qbankentry) {
             return;
         }
         $question->id = $DB->insert_record('question', $question);
         $qbankentry->id = $DB->insert_record('question_bank_entries', $qbankentry);
-        $this->insert_question_version( $qbankentry->id, $question->id );
+        $this->insert_question_version($qbankentry->id, $question->id);
         // Add options.
         $options = $this->make_multichoice_options($question->id);
         $DB->insert_record('qtype_multichoice_options', $options);
@@ -265,32 +271,32 @@ private function insert_multichoice_question_definition(string $name, array $ans
             $qanswer = $this->make_generic_question_answer($question->id, 1, $answer);
             $DB->insert_record('question_answers', $qanswer);
         }
-        /* debugging( "Question ID ".$question->id ); */
     }
 
-    /* Create a question version database object, linking the given question
-     * and question bank entry.
+    /**
+     * Create a question version database object, linking the given question and question bank entry.
+     *
      * @param int $qbankid The ID of the question banke entry
      * @param int $qid The ID of the question
-     * @return \stdClass
+     * @return stdClass
      */
-    private function insert_question_version(int $qbankid, int $qid) {
+    private function insert_question_version(int $qbankid, int $qid): stdClass {
         global $DB;
-        $qv = new \stdClass();
-        $qv->questionbankentryid = $qbankid;
-        $qv->version = 1;
-        $qv->questionid = $qid;
-        $qv->id = $DB->insert_record('question_versions', $qv);
-        return $qv;
+        $questionversion = new stdClass();
+        $questionversion->questionbankentryid = $qbankid;
+        $questionversion->version = 1;
+        $questionversion->questionid = $qid;
+        $questionversion->id = $DB->insert_record('question_versions', $questionversion);
+        return $questionversion;
     }
 
     /**
      * Insert a short answer question to the database.
+     *
      * @param string $name The name of the short answer question
      */
     private function insert_shortanswer_question_definition(string $name) {
         global $DB;
-        /* debugging("insert_shortanswer_question_definition: ".$name ) ; */
         $question = $this->make_generic_question_definition('shortanswer', $name);
         if (!$question) {
             return;
@@ -301,7 +307,7 @@ private function insert_shortanswer_question_definition(string $name) {
         }
         $question->id = $DB->insert_record('question', $question);
         $qbankentry->id = $DB->insert_record('question_bank_entries', $qbankentry);
-        $this->insert_question_version( $qbankentry->id, $question->id );
+        $this->insert_question_version($qbankentry->id, $question->id);
 
         // Add options.
         $options = $this->make_shortanswer_options($question->id);
@@ -311,9 +317,14 @@ private function insert_shortanswer_question_definition(string $name) {
         $DB->insert_record('question_answers', $answer);
     }
 
-    private function insert_shortmath_question_definition(string $name) {
+    /**
+     * Add shortmath question for improvisation.
+     *
+     * @param string $name
+     * @return void
+     */
+    private function insert_shortmath_question_definition(string $name): void {
         global $DB;
-        /* debugging("insert_shortmath_question_definition: ".$name ) ; */
         $question = $this->make_generic_question_definition('shortmath', $name);
         if (!$question) {
             return;
@@ -337,7 +348,7 @@ private function insert_shortmath_question_definition(string $name) {
      * Insert all the improvised question definitions to the question bank.
      * Every question will have a prefix of {IMPROV}
      */
-    public function insert_default_improvised_question_definitions() {
+    public function insert_default_improvised_question_definitions(): void {
         $multichoice = get_string('multichoice_options', 'jazzquiz');
         $yes = get_string('yes');
         $no = get_string('no');
@@ -346,7 +357,7 @@ public function insert_default_improvised_question_definitions() {
         $this->insert_multichoice_question_definition("5 $multichoice", ['A', 'B', 'C', 'D', 'E']);
         $this->insert_shortanswer_question_definition(get_string('short_answer', 'jazzquiz'));
         // TODO: Remove the check in the future, 2020+. Avoid messing with as many existing instances as possible.
-        if (!$this->get_improvised_question_definition('True / False')) {
+        if ($this->get_improvised_question_definition('True / False') === null) {
             $this->insert_multichoice_question_definition("$yes / $no", [$yes, $no]);
         }
         $this->insert_shortmath_question_definition(get_string('short_math_answer', 'jazzquiz'));
diff --git a/classes/jazzquiz.php b/classes/jazzquiz.php
index f9d9eda..0b44f86 100755
--- a/classes/jazzquiz.php
+++ b/classes/jazzquiz.php
@@ -16,9 +16,16 @@
 
 namespace mod_jazzquiz;
 
-defined('MOODLE_INTERNAL') || die();
+use context_module;
+use core\context\module;
+use moodle_url;
+use question_display_options;
+use renderer_base;
+use stdClass;
 
 /**
+ * The JazzQuiz activity.
+ *
  * @package   mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastian@sgundersen.com>
  * @copyright 2014 University of Wisconsin - Madison
@@ -26,52 +33,49 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class jazzquiz {
-    /**
-     * @var array $review fields Static review fields to add as options
-     */
-    public static $reviewfields = [
+
+    /** @var array $review fields Static review fields to add as options */
+    public static array $reviewfields = [
         'attempt' => ['theattempt', 'jazzquiz'],
         'correctness' => ['whethercorrect', 'question'],
         'marks' => ['marks', 'jazzquiz'],
         'specificfeedback' => ['specificfeedback', 'question'],
         'generalfeedback' => ['generalfeedback', 'question'],
         'rightanswer' => ['rightanswer', 'question'],
-        'manualcomment' => ['manualcomment', 'jazzquiz']
+        'manualcomment' => ['manualcomment', 'jazzquiz'],
     ];
 
-    /** @var \stdClass $cm course module */
-    public $cm;
-
-    /** @var \stdClass $course */
-    public $course;
+    /** @var stdClass $cm course module */
+    public stdClass $cm;
 
-    /** @var \context_module $context */
-    public $context;
+    /** @var stdClass $course */
+    public stdClass $course;
 
-    /** @var \plugin_renderer_base|output\renderer $renderer */
-    public $renderer;
+    /** @var module $context */
+    public module $context;
 
-    /** @var \stdClass $data The jazzquiz database table row */
-    public $data;
+    /** @var renderer_base $renderer */
+    public renderer_base $renderer;
 
-    /** @var bool $isinstructor */
-    protected $isinstructor;
+    /** @var stdClass $data The jazzquiz database table row */
+    public stdClass $data;
 
-    /** @var jazzquiz_question[] */
-    public $questions;
+    /** @var jazzquiz_question[] $questions */
+    public array $questions;
 
     /**
+     * Constructor.
+     *
      * @param int $cmid The course module ID
-     * @param string $renderersubtype Renderer sub-type to load if requested
      */
-    public function __construct($cmid) {
+    public function __construct(int $cmid) {
         global $PAGE, $DB;
         $this->cm = get_coursemodule_from_id('jazzquiz', $cmid, 0, false, MUST_EXIST);
 
         // TODO: Login requirement must be moved over to caller.
         require_login($this->cm->course, false, $this->cm);
 
-        $this->context = \context_module::instance($cmid);
+        $this->context = context_module::instance($cmid);
         $PAGE->set_context($this->context);
         $this->renderer = $PAGE->get_renderer('mod_jazzquiz');
 
@@ -81,66 +85,68 @@ public function __construct($cmid) {
     }
 
     /**
-     * Sets up the display options for the question
+     * Sets up the display options for the question.
+     *
      * @param bool $review
-     * @param string|\stdClass $reviewoptions
-     * @return \question_display_options
+     * @param string|stdClass $reviewoptions
+     * @return question_display_options
      */
-    public function get_display_options(bool $review, $reviewoptions) {
-        $options = new \question_display_options();
-        $options->flags = \question_display_options::HIDDEN;
+    public function get_display_options(bool $review, string|stdClass $reviewoptions): question_display_options {
+        $options = new question_display_options();
+        $options->flags = question_display_options::HIDDEN;
         $options->context = $this->context;
-        $options->marks = \question_display_options::HIDDEN;
+        $options->marks = question_display_options::HIDDEN;
         if ($review) {
             // Default display options for review.
             $options->readonly = true;
             $options->hide_all_feedback();
             // Special case for "edit" review options value.
             if ($reviewoptions === 'edit') {
-                $options->correctness = \question_display_options::VISIBLE;
-                $options->marks = \question_display_options::MARK_AND_MAX;
-                $options->feedback = \question_display_options::VISIBLE;
-                $options->numpartscorrect = \question_display_options::VISIBLE;
-                $options->manualcomment = \question_display_options::EDITABLE;
-                $options->generalfeedback = \question_display_options::VISIBLE;
-                $options->rightanswer = \question_display_options::VISIBLE;
-                $options->history = \question_display_options::VISIBLE;
-            } else if ($reviewoptions instanceof \stdClass) {
+                $options->correctness = question_display_options::VISIBLE;
+                $options->marks = question_display_options::MARK_AND_MAX;
+                $options->feedback = question_display_options::VISIBLE;
+                $options->numpartscorrect = question_display_options::VISIBLE;
+                $options->manualcomment = question_display_options::EDITABLE;
+                $options->generalfeedback = question_display_options::VISIBLE;
+                $options->rightanswer = question_display_options::VISIBLE;
+                $options->history = question_display_options::VISIBLE;
+            } else if ($reviewoptions instanceof stdClass) {
                 foreach (self::$reviewfields as $field => $unused) {
                     if ($reviewoptions->$field == 1) {
                         if ($field == 'specificfeedback') {
                             $field = 'feedback';
                         }
                         if ($field == 'marks') {
-                            $options->$field = \question_display_options::MARK_AND_MAX;
+                            $options->$field = question_display_options::MARK_AND_MAX;
                         } else {
-                            $options->$field = \question_display_options::VISIBLE;
+                            $options->$field = question_display_options::VISIBLE;
                         }
                     }
                 }
             }
         } else {
             // Default options for running quiz.
-            $options->rightanswer = \question_display_options::HIDDEN;
-            $options->numpartscorrect = \question_display_options::HIDDEN;
-            $options->manualcomment = \question_display_options::HIDDEN;
-            $options->manualcommentlink = \question_display_options::HIDDEN;
+            $options->rightanswer = question_display_options::HIDDEN;
+            $options->numpartscorrect = question_display_options::HIDDEN;
+            $options->manualcomment = question_display_options::HIDDEN;
+            $options->manualcommentlink = question_display_options::HIDDEN;
         }
         return $options;
     }
 
     /**
-     * Get the open session. If none exist, false is returned.
-     * @return jazzquiz_session|false
+     * Get the open session. Returns null if no session is open.
+     *
+     * @return ?jazzquiz_session
      */
-    public function load_open_session() {
+    public function load_open_session(): ?jazzquiz_session {
         global $DB;
         $sessions = $DB->get_records('jazzquiz_sessions', [
             'jazzquizid' => $this->data->id,
-            'sessionopen' => 1
+            'sessionopen' => 1,
         ], 'id');
-        if (count($sessions) === 0) {
-            return false;
+        if (empty($sessions)) {
+            return null;
         }
         $session = reset($sessions);
         return new jazzquiz_session($this, $session->id);
@@ -148,30 +154,31 @@ public function load_open_session() {
 
     /**
      * Check if a session is open for this quiz.
+     *
      * @return bool true if open
      */
-    public function is_session_open() {
+    public function is_session_open(): bool {
         global $DB;
-        $sessions = $DB->get_records('jazzquiz_sessions', [
+        return $DB->record_exists('jazzquiz_sessions', [
             'jazzquizid' => $this->data->id,
-            'sessionopen' => 1
+            'sessionopen' => 1,
         ]);
-        return count($sessions);
     }
 
     /**
      * Create a new session for this quiz.
+     *
      * @param string $name
      * @param int $anonymity
-     * @param int $allowguests
-     * @return int|false Session ID returned if successful, else false.
+     * @param bool $allowguests
      */
-    public function create_session(string $name, int $anonymity, int $allowguests) {
+    public function create_session(string $name, int $anonymity, bool $allowguests): void {
         global $DB;
         $this->data->cfganonymity = $anonymity;
-        $this->data->cfgallowguests = $allowguests;
-        $this->save();
-        $session = new \stdClass();
+        $this->data->cfgallowguests = $allowguests ? 1 : 0;
+        $DB->update_record('jazzquiz', $this->data);
+
+        $session = new stdClass();
         $session->name = $name;
         $session->jazzquizid = $this->data->id;
         $session->sessionopen = 1;
@@ -179,22 +186,9 @@ public function create_session(string $name, int $anonymity, int $allowguests) {
         $session->slot = 0;
         $session->anonymity = $anonymity;
         $session->showfeedback = false;
-        $session->allowguests = $allowguests;
+        $session->allowguests = $allowguests ? 1 : 0;
         $session->created = time();
-        try {
-            return $DB->insert_record('jazzquiz_sessions', $session);
-        } catch (\Exception $e) {
-            return false;
-        }
-    }
-
-    /**
-     * Saves the JazzQuiz instance to the database
-     * @return bool
-     */
-    public function save() {
-        global $DB;
-        return $DB->update_record('jazzquiz', $this->data);
+        $DB->insert_record('jazzquiz_sessions', $session);
     }
 
     /**
@@ -205,9 +199,9 @@ public function save() {
      *
      * @param int $questionid The question bank's question id
      */
-    public function add_question($questionid) {
+    public function add_question(int $questionid): void {
         global $DB;
-        $question = new \stdClass();
+        $question = new stdClass();
         $question->jazzquizid = $this->data->id;
         $question->questionid = $questionid;
         $question->questiontime = $this->data->defaultquestiontime;
@@ -218,12 +212,13 @@ public function add_question($questionid) {
 
     /**
      * Apply a sorted array of jazzquiz_question IDs to the quiz.
+     *
      * Questions that are missing from the array will also be removed from the quiz.
      * Duplicate values will silently be removed.
      *
      * @param int[] $order
      */
-    public function set_question_order(array $order) {
+    public function set_question_order(array $order): void {
         global $DB;
         $order = array_unique($order);
         $questions = $DB->get_records('jazzquiz_questions', ['jazzquizid' => $this->data->id], 'slot');
@@ -240,9 +235,11 @@ public function set_question_order(array $order) {
     }
 
     /**
+     * Get the question order.
+     *
      * @return int[] of jazzquiz_question id
      */
-    public function get_question_order() : array {
+    public function get_question_order(): array {
         $order = [];
         foreach ($this->questions as $question) {
             $order[] = $question->data->id;
@@ -251,12 +248,13 @@ public function get_question_order() : array {
     }
 
     /**
-     * Edit a JazzQuiz question
+     * Edit a JazzQuiz question.
+     *
      * @param int $questionid the JazzQuiz question id
      */
-    public function edit_question($questionid) {
+    public function edit_question(int $questionid): void {
         global $DB;
-        $url = new \moodle_url('/mod/jazzquiz/edit.php', ['id' => $this->cm->id]);
+        $url = new moodle_url('/mod/jazzquiz/edit.php', ['id' => $this->cm->id]);
         $actionurl = clone($url);
         $actionurl->param('action', 'editquestion');
         $actionurl->param('questionid', $questionid);
@@ -267,7 +265,7 @@ public function edit_question($questionid) {
         $mform = new forms\edit\add_question_form($actionurl, [
             'jazzquiz' => $this,
             'questionname' => $question->name,
-            'edit' => true
+            'edit' => true,
         ]);
 
         // Form handling.
@@ -276,7 +274,7 @@ public function edit_question($questionid) {
             $url->remove_params('action');
             redirect($url, null, 0);
         } else if ($data = $mform->get_data()) {
-            $question = new \stdClass();
+            $question = new stdClass();
             $question->id = $jazzquizquestion->id;
             $question->jazzquizid = $this->data->id;
             $question->questionid = $jazzquizquestion->questionid;
@@ -293,7 +291,7 @@ public function edit_question($questionid) {
             // Display the form.
             $mform->set_data([
                 'questiontime' => $jazzquizquestion->questiontime,
-                'notime' => ($jazzquizquestion->questiontime < 1)
+                'notime' => $jazzquizquestion->questiontime < 1,
             ]);
             $this->renderer->header($this, 'edit');
             echo '<div class="generalbox boxaligncenter jazzquiz-box">';
@@ -306,7 +304,7 @@ public function edit_question($questionid) {
     /**
      * Loads the quiz questions from the database, ordered by slot.
      */
-    public function refresh_questions() {
+    public function refresh_questions(): void {
         global $DB;
         $this->questions = [];
         $questions = $DB->get_records('jazzquiz_questions', ['jazzquizid' => $this->data->id], 'slot');
@@ -321,35 +319,36 @@ public function refresh_questions() {
     }
 
     /**
+     * Get a JazzQuiz question by id.
+     *
      * @param int $jazzquizquestionid
-     * @return jazzquiz_question|bool
+     * @return ?jazzquiz_question
      */
-    public function get_question_by_id($jazzquizquestionid) {
+    public function get_question_by_id(int $jazzquizquestionid): ?jazzquiz_question {
         foreach ($this->questions as $question) {
             if ($question->data->id == $jazzquizquestionid) {
                 return $question;
             }
         }
-        return false;
+        return null;
     }
 
     /**
-     * Quick function for whether or not the current user is the instructor/can control the quiz
+     * Check if the current user is an instructor in this quiz.
+     *
      * @return bool
      */
-    public function is_instructor() : bool {
-        if (is_null($this->isinstructor)) {
-            $this->isinstructor = has_capability('mod/jazzquiz:control', $this->context);
-        }
-        return $this->isinstructor;
+    public function is_instructor(): bool {
+        return has_capability('mod/jazzquiz:control', $this->context);
     }
 
     /**
-     * Get all sessions for this jazzquiz
+     * Get all sessions for this jazzquiz.
+     *
      * @param array $conditions
-     * @return \stdClass[]
+     * @return stdClass[]
      */
-    public function get_sessions(array $conditions = []) : array {
+    public function get_sessions(array $conditions = []): array {
         global $DB;
         $conditions = array_merge(['jazzquizid' => $this->data->id], $conditions);
         return $DB->get_records('jazzquiz_sessions', $conditions);
diff --git a/classes/jazzquiz_attempt.php b/classes/jazzquiz_attempt.php
index f0ad7cb..133c020 100755
--- a/classes/jazzquiz_attempt.php
+++ b/classes/jazzquiz_attempt.php
@@ -16,7 +16,12 @@
 
 namespace mod_jazzquiz;
 
-defined('MOODLE_INTERNAL') || die();
+use context_module;
+use core\context\module;
+use question_bank;
+use question_engine;
+use question_usage_by_activity;
+use stdClass;
 
 /**
  * An attempt for the quiz. Maps to individual question attempts.
@@ -29,61 +34,101 @@
  */
 class jazzquiz_attempt {
 
-    /** Constants for the status of the attempt */
+    /** The attempt has not started. */
     const NOTSTARTED = 0;
+
+    /** The attempt is in progress. */
     const INPROGRESS = 10;
+
+    /** The attempt is only for preview. */
     const PREVIEW = 20;
+
+    /** The attempt is finished. */
     const FINISHED = 30;
 
-    /** @var \stdClass */
-    public $data;
+    /** @var int The jazzquiz attempt id */
+    public int $id;
+
+    /** @var int The jazzquiz session id */
+    public int $sessionid;
+
+    /** @var int|null The user id */
+    public ?int $userid;
+
+    /** @var int The question usage by activity id */
+    public int $questionengid;
+
+    /** @var string|null The guest session key */
+    public ?string $guestsession;
 
-    /** @var \question_usage_by_activity $quba the question usage by activity for this attempt */
-    public $quba;
+    /** @var int Current status of this attempt */
+    public int $status;
+
+    /** @var int|null Response status for the current question */
+    public ?int $responded;
+
+    /** @var int When this quiz attempt started */
+    public int $timestart;
+
+    /** @var int|null When this quiz attempt finished */
+    public ?int $timefinish;
+
+    /** @var int When this quiz attempt was last modified */
+    public int $timemodified;
+
+    /** @var question_usage_by_activity The question usage by activity for this attempt */
+    public question_usage_by_activity $quba;
 
     /**
-     * Construct the class. If data is passed in we set it, otherwise initialize empty class
-     * @param \context_module $context
-     * @param \stdClass $data
+     * Constructor.
+     *
+     * @param stdClass $record
      */
-    public function __construct(\context_module $context, \stdClass $data = null) {
-        if (empty($data)) {
-            // Create new attempt.
-            $this->data = new \stdClass();
-            // Create a new quba since we're creating a new attempt.
-            $this->quba = \question_engine::make_questions_usage_by_activity('mod_jazzquiz', $context);
-            $this->quba->set_preferred_behaviour('immediatefeedback');
-        } else {
-            // Load it up in this class instance.
-            $this->data = $data;
-            $this->quba = \question_engine::load_questions_usage_by_activity($this->data->questionengid);
-        }
+    private function __construct(stdClass $record) {
+        $this->id = $record->id;
+        $this->sessionid = $record->sessionid;
+        $this->userid = $record->userid;
+        $this->questionengid = $record->questionengid;
+        $this->guestsession = $record->guestsession;
+        $this->status = $record->status;
+        $this->responded = $record->responded;
+        $this->timestart = $record->timestart;
+        $this->timefinish = $record->timefinish;
+        $this->timemodified = $record->timemodified;
+        $this->quba = question_engine::load_questions_usage_by_activity($this->questionengid);
     }
 
-    public function belongs_to_current_user() {
+    /**
+     * Check if the attempt belongs to the current user.
+     *
+     * @return bool
+     */
+    public function belongs_to_current_user(): bool {
         global $USER;
-        return $this->data->userid == $USER->id || $this->data->guestsession == $USER->sesskey;
+        return $this->userid == $USER->id || $this->guestsession === $USER->sesskey;
     }
 
     /**
      * Check if this attempt is currently in progress.
+     *
      * @return bool
      */
-    public function is_active() {
-        switch ($this->data->status) {
-            case self::INPROGRESS:
-            case self::PREVIEW:
-                return true;
-            default:
-                return false;
-        }
+    public function is_active(): bool {
+        return match ($this->status) {
+            self::INPROGRESS, self::PREVIEW => true,
+            default => false,
+        };
     }
 
     /**
+     * Create missing question attempts.
+     *
+     * This is necessary when new questions have been added by the teacher during the quiz.
+     *
      * @param jazzquiz_session $session
      * @return bool false if invalid question id
      */
-    public function create_missing_attempts(jazzquiz_session $session) {
+    public function create_missing_attempts(jazzquiz_session $session): bool {
         foreach ($session->questions as $slot => $question) {
             if ($this->quba->next_slot_number() > $slot) {
                 continue;
@@ -93,22 +138,24 @@ public function create_missing_attempts(jazzquiz_session $session) {
             if (!$questiondefinition) {
                 return false;
             }
-            $question = \question_bank::make_question($questiondefinition);
+            $question = question_bank::make_question($questiondefinition);
             $slot = $this->quba->add_question($question);
             $this->quba->start_question($slot);
-            $this->data->responded = 0;
+            $this->responded = 0;
         }
         return true;
     }
 
     /**
      * Anonymize all the question attempt steps for this quiz attempt.
+     *
      * It will be impossible to identify which user answered all questions linked to this question usage.
-     * @throws \dml_exception
+     *
+     * @return void
      */
-    public function anonymize_answers() {
+    public function anonymize_answers(): void {
         global $DB;
-        $attempts = $DB->get_records('question_attempts', ['questionusageid' => $this->data->questionengid]);
+        $attempts = $DB->get_records('question_attempts', ['questionusageid' => $this->questionengid]);
         foreach ($attempts as $attempt) {
             $steps = $DB->get_records('question_attempt_steps', ['questionattemptid' => $attempt->id]);
             foreach ($steps as $step) {
@@ -116,67 +163,123 @@ public function anonymize_answers() {
                 $DB->update_record('question_attempt_steps', $step);
             }
         }
-        $this->data->userid = null;
+        $this->userid = null;
         $this->save();
     }
 
     /**
-     * Saves the current attempt.
-     * @return bool
+     * Helper function to properly create a new attempt for a JazzQuiz session.
+     *
+     * @param jazzquiz_session $session
+     * @return jazzquiz_attempt
      */
-    public function save() {
+    public static function create(jazzquiz_session $session): jazzquiz_attempt {
+        global $DB, $USER;
+        $quba = question_engine::make_questions_usage_by_activity('mod_jazzquiz', $session->jazzquiz->context);
+        $quba->set_preferred_behaviour('immediatefeedback');
+        // TODO: Don't suppress the error if it becomes possible to save QUBAs without slots.
+        @question_engine::save_questions_usage_by_activity($quba);
+        $id = $DB->insert_record('jazzquiz_attempts', [
+            'sessionid' => $session->data->id,
+            'userid' => isguestuser($USER->id) ? null : $USER->id,
+            'questionengid' => $quba->get_id(),
+            'guestsession' => isguestuser($USER->id) ? $USER->sesskey : null,
+            'status' => self::NOTSTARTED,
+            'responded' => null,
+            'timestart' => time(),
+            'timefinish' => null,
+            'timemodified' => time(),
+        ]);
+        $attempt = self::get_by_id($id);
+        $attempt->create_missing_attempts($session);
+        return $attempt;
+    }
+
+    /**
+     * Helper function to properly load a JazzQuiz attempt by its ID.
+     *
+     * @param int $id
+     * @return jazzquiz_attempt
+     */
+    public static function get_by_id(int $id): jazzquiz_attempt {
         global $DB;
+        $record = $DB->get_record('jazzquiz_attempts', ['id' => $id], '*', MUST_EXIST);
+        return new jazzquiz_attempt($record);
+    }
 
-        // Save the question usage by activity object.
-        if ($this->quba->question_count() > 0) {
-            \question_engine::save_questions_usage_by_activity($this->quba);
-        } else {
-            // TODO: Don't suppress the error if it becomes possible to save QUBAs without slots.
-            @\question_engine::save_questions_usage_by_activity($this->quba);
+    /**
+     * Helper function to properly load a JazzQuiz attempt for the current user in a session.
+     *
+     * @param jazzquiz_session $session
+     * @return jazzquiz_attempt
+     */
+    public static function get_by_session_for_current_user(jazzquiz_session $session): jazzquiz_attempt {
+        global $DB, $USER;
+        $sql = 'SELECT *
+                  FROM {jazzquiz_attempts}
+                 WHERE sessionid = :sessionid
+                   AND (userid = :userid OR guestsession = :sesskey)';
+        $record = $DB->get_record_sql($sql, [
+            'sessionid' => $session->data->id,
+            'userid' => $USER->id,
+            'sesskey' => $USER->sesskey,
+        ]);
+        if (empty($record)) {
+            return self::create($session);
         }
+        return new jazzquiz_attempt($record);
+    }
 
-        // Add the quba id as the questionengid.
-        // This is here because for new usages there is no id until we save it.
-        $this->data->questionengid = $this->quba->get_id();
-        $this->data->timemodified = time();
-        try {
-            if (isset($this->data->id)) {
-                $DB->update_record('jazzquiz_attempts', $this->data);
-            } else {
-                $this->data->id = $DB->insert_record('jazzquiz_attempts', $this->data);
-            }
-        } catch (\Exception $e) {
-            return false;
+    /**
+     * Save attempt.
+     */
+    public function save(): void {
+        global $DB;
+        if ($this->quba->question_count() > 0) {
+            question_engine::save_questions_usage_by_activity($this->quba);
         }
-        return true;
+        $this->timemodified = time();
+        $DB->update_record('jazzquiz_attempts', [
+            'id' => $this->id,
+            'sessionid' => $this->sessionid,
+            'userid' => $this->userid,
+            'questionengid' => $this->questionengid,
+            'guestsession' => $this->guestsession,
+            'status' => $this->status,
+            'responded' => $this->responded,
+            'timestart' => $this->timestart,
+            'timefinish' => $this->timefinish,
+            'timemodified' => $this->timemodified,
+        ]);
     }
 
     /**
-     * Saves a question attempt from the jazzquiz question
+     * Saves a question attempt from the jazzquiz question.
+     *
      * @param int $slot
      */
-    public function save_question($slot) {
+    public function save_question(int $slot): void {
         global $DB;
         $transaction = $DB->start_delegated_transaction();
         $this->quba->process_all_actions();
         $this->quba->finish_question($slot, time());
-        $this->data->timemodified = time();
-        $this->data->responded = 1;
+        $this->timemodified = time();
+        $this->responded = 1;
         $this->save();
         $transaction->allow_commit();
     }
 
     /**
-     * Gets the feedback for the specified question slot
+     * Gets the feedback for the specified question slot.
      *
      * If no slot is defined, we attempt to get that from the slots param passed
-     * back from the form submission
+     * back from the form submission.
      *
      * @param jazzquiz $jazzquiz
      * @param int $slot The slot for which we want to get feedback
      * @return string HTML fragment of the feedback
      */
-    public function get_question_feedback(jazzquiz $jazzquiz, $slot = -1) {
+    public function get_question_feedback(jazzquiz $jazzquiz, int $slot = -1): string {
         global $PAGE;
         if ($slot === -1) {
             // Attempt to get it from the slots param sent back from a question processing.
@@ -191,21 +294,23 @@ public function get_question_feedback(jazzquiz $jazzquiz, $slot = -1) {
     }
 
     /**
-     * Returns whether current user has responded
+     * Returns whether current user has responded.
+     *
      * @param int $slot
      * @return bool
      */
-    public function has_responded($slot) {
-        $response = $this->quba->get_question_attempt($slot)->get_response_summary();
-        return $response !== null && $response !== '';
+    public function has_responded(int $slot): bool {
+        $questionattempt = $this->quba->get_question_attempt($slot);
+        return !empty($questionattempt->get_response_summary());
     }
 
     /**
-     * Returns response data as an array
+     * Returns response data as an array.
+     *
      * @param int $slot
      * @return string[]
      */
-    public function get_response_data($slot) {
+    public function get_response_data(int $slot): array {
         $questionattempt = $this->quba->get_question_attempt($slot);
         $response = $questionattempt->get_response_summary();
         if ($response === null || $response === '') {
@@ -227,20 +332,26 @@ public function get_response_data($slot) {
     }
 
     /**
-     * Closes the attempt
+     * Closes the attempt.
+     *
      * @param jazzquiz $jazzquiz
      */
-    public function close_attempt(jazzquiz $jazzquiz) {
+    public function close_attempt(jazzquiz $jazzquiz): void {
         $this->quba->finish_all_questions(time());
         // We want the instructor to remain in preview mode.
         if (!$jazzquiz->is_instructor()) {
-            $this->data->status = self::FINISHED;
+            $this->status = self::FINISHED;
         }
-        $this->data->timefinish = time();
+        $this->timefinish = time();
         $this->save();
     }
 
-    public function total_answers() : int {
+    /**
+     * Get total answers.
+     *
+     * @return int
+     */
+    public function total_answers(): int {
         $count = 0;
         foreach ($this->quba->get_slots() as $slot) {
             if ($this->has_responded($slot)) {
diff --git a/classes/jazzquiz_question.php b/classes/jazzquiz_question.php
index b1b3364..c50d84a 100755
--- a/classes/jazzquiz_question.php
+++ b/classes/jazzquiz_question.php
@@ -16,9 +16,11 @@
 
 namespace mod_jazzquiz;
 
-defined('MOODLE_INTERNAL') || die();
+use stdClass;
 
 /**
+ * A question slot in a JazzQuiz.
+ *
  * @package     mod_jazzquiz
  * @author      Sebastian S. Gundersen <sebastsg@stud.ntnu.no>
  * @copyright   2018 NTNU
@@ -26,23 +28,30 @@
  */
 class jazzquiz_question {
 
-    /** @var \stdClass $data */
-    public $data;
+    /** @var stdClass */
+    public stdClass $data;
 
-    /** @var \stdClass $question Question definition data */
-    public $question;
+    /** @var ?stdClass Question definition data */
+    public ?stdClass $question;
 
     /**
-     * @param \stdClass $data jazzquiz_question
+     * Constructor.
+     *
+     * @param stdClass $data jazzquiz_question
      */
-    public function __construct(\stdClass $data) {
+    public function __construct(stdClass $data) {
         global $DB;
         $this->data = $data;
-        $this->question = $DB->get_record('question', ['id' => $data->questionid]);
+        $this->question = $DB->get_record('question', ['id' => $data->questionid]) ?: null;
     }
 
-    public function is_valid() {
-        return $this->question !== false;
+    /**
+     * Check if the question exists.
+     *
+     * @return bool
+     */
+    public function is_valid(): bool {
+        return $this->question !== null;
     }
 
 }
diff --git a/classes/jazzquiz_session.php b/classes/jazzquiz_session.php
index b2bbe27..4e69472 100755
--- a/classes/jazzquiz_session.php
+++ b/classes/jazzquiz_session.php
@@ -16,9 +16,13 @@
 
 namespace mod_jazzquiz;
 
-defined('MOODLE_INTERNAL') || die();
+use qubaid_join;
+use question_engine;
+use stdClass;
 
 /**
+ * A session.
+ *
  * @package   mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastian@sgundersen.com>
  * @copyright 2014 University of Wisconsin - Madison
@@ -28,42 +32,44 @@
 class jazzquiz_session {
 
     /** @var jazzquiz $jazzquiz */
-    public $jazzquiz;
+    public jazzquiz $jazzquiz;
 
-    /** @var \stdClass $data The jazzquiz_session database table row */
-    public $data;
+    /** @var stdClass $data The jazzquiz_session database table row */
+    public stdClass $data;
 
     /** @var jazzquiz_attempt[] */
-    public $attempts;
+    public array $attempts;
 
-    /** @var jazzquiz_attempt|false $attempt The current user's quiz attempt. False if not loaded. */
-    public $attempt;
+    /** @var ?jazzquiz_attempt The current user's quiz attempt */
+    public ?jazzquiz_attempt $myattempt;
 
-    /** @var \stdClass[] jazzquiz_session_questions */
-    public $questions;
+    /** @var stdClass[] Questions in this session */
+    public array $questions;
 
     /**
      * Constructor.
+     *
      * @param jazzquiz $jazzquiz
      * @param int $sessionid
      */
-    public function __construct(jazzquiz $jazzquiz, $sessionid) {
+    public function __construct(jazzquiz $jazzquiz, int $sessionid) {
         global $DB;
         $this->jazzquiz = $jazzquiz;
         $this->attempts = [];
-        $this->attempt = false;
+        $this->myattempt = null;
         $this->questions = [];
         $this->data = $DB->get_record('jazzquiz_sessions', [
             'jazzquizid' => $this->jazzquiz->data->id,
-            'id' => $sessionid
+            'id' => $sessionid,
         ], '*', MUST_EXIST);
     }
 
     /**
      * Get array of unasked slots.
+     *
      * @return int[] question slots.
      */
-    public function get_unasked_slots() : array {
+    public function get_unasked_slots(): array {
         $slots = [];
         foreach ($this->jazzquiz->questions as $question) {
             $asked = false;
@@ -80,57 +86,61 @@ public function get_unasked_slots() : array {
         return $slots;
     }
 
-    private function requires_anonymous_answers() {
+    /**
+     * Check if this session requires anonymous answers.
+     *
+     * @return bool
+     */
+    private function requires_anonymous_answers(): bool {
         return $this->data->anonymity != 3;
     }
 
-    private function requires_anonymous_attendance() {
+    /**
+     * Check if this session requires anonymous attendance.
+     *
+     * @return bool
+     */
+    private function requires_anonymous_attendance(): bool {
         return $this->data->anonymity == 2;
     }
 
     /**
-     * Saves the session object to the database
-     * @return bool
+     * Saves the session object to the database.
      */
-    public function save() {
+    public function save(): void {
         global $DB;
-        // Update if we already have a session, otherwise create it.
         if (isset($this->data->id)) {
-            try {
-                $DB->update_record('jazzquiz_sessions', $this->data);
-            } catch (\Exception $e) {
-                return false;
-            }
+            $DB->update_record('jazzquiz_sessions', $this->data);
         } else {
-            try {
-                $this->data->id = $DB->insert_record('jazzquiz_sessions', $this->data);
-            } catch (\Exception $e) {
-                return false;
-            }
+            $this->data->id = $DB->insert_record('jazzquiz_sessions', $this->data);
         }
-        return true;
     }
 
     /**
      * Deletes the specified session, as well as the attempts.
+     *
      * @param int $sessionid
-     * @return bool
      */
-    public static function delete($sessionid) {
+    public static function delete(int $sessionid): void {
         global $DB;
         // Delete all attempt quba ids, then all JazzQuiz attempts, and then finally itself.
-        $condition = new \qubaid_join('{jazzquiz_attempts} jqa', 'jqa.questionengid', 'jqa.sessionid = :sessionid', [
-            'sessionid' => $sessionid
+        $condition = new qubaid_join('{jazzquiz_attempts} jqa', 'jqa.questionengid', 'jqa.sessionid = :sessionid', [
+            'sessionid' => $sessionid,
         ]);
-        \question_engine::delete_questions_usage_by_activities($condition);
+        question_engine::delete_questions_usage_by_activities($condition);
         $DB->delete_records('jazzquiz_attempts', ['sessionid' => $sessionid]);
         $DB->delete_records('jazzquiz_session_questions', ['sessionid' => $sessionid]);
         $DB->delete_records('jazzquiz_votes', ['sessionid' => $sessionid]);
         $DB->delete_records('jazzquiz_sessions', ['id' => $sessionid]);
-        return true;
     }
 
-    public function user_name_for_answer($userid) {
+    /**
+     * Get appropriate display name linked to a question attempt.
+     *
+     * @param ?int $userid
+     * @return string
+     */
+    public function user_name_for_answer(?int $userid): string {
         global $DB;
         if ($this->requires_anonymous_answers() || is_null($userid)) {
             return get_string('anonymous', 'jazzquiz');
@@ -142,7 +152,13 @@ public function user_name_for_answer($userid) {
         return $user->lastname . ', ' . $user->firstname;
     }
 
-    public function user_name_for_attendance($userid) {
+    /**
+     * Get appropriate display name linked to session attendance.
+     *
+     * @param ?int $userid
+     * @return string
+     */
+    public function user_name_for_attendance(?int $userid): string {
         global $DB;
         if ($this->requires_anonymous_attendance() || is_null($userid)) {
             return get_string('anonymous', 'jazzquiz');
@@ -154,7 +170,13 @@ public function user_name_for_attendance($userid) {
         return $user->lastname . ', ' . $user->firstname;
     }
 
-    public function user_idnumber_for_attendance($userid) {
+    /**
+     * Get user ID for attendance.
+     *
+     * @param ?int $userid
+     * @return string
+     */
+    public function user_idnumber_for_attendance(?int $userid): string {
         global $DB;
         if ($this->requires_anonymous_attendance() || is_null($userid)) {
             return get_string('anonymous', 'jazzquiz');
@@ -170,7 +192,7 @@ public function user_idnumber_for_attendance($userid) {
      * Anonymize attendance, making it unknown how many questions each user has answered.
      * Only makes sense to do this along with anonymizing answers. This should be called first.
      */
-    private function anonymize_attendance() {
+    private function anonymize_attendance(): void {
         global $DB;
         $attendances = $DB->get_records('jazzquiz_attendance', ['sessionid' => $this->data->id]);
         foreach ($attendances as $attendance) {
@@ -179,11 +201,16 @@ private function anonymize_attendance() {
         }
     }
 
-    private function anonymize_users() {
+    /**
+     * Anonymize the attempts of users who have attended this session.
+     *
+     * @return void
+     */
+    private function anonymize_users(): void {
         if ($this->requires_anonymous_attendance()) {
             $this->anonymize_attendance();
         }
-        foreach ($this->attempts as &$attempt) {
+        foreach ($this->attempts as $attempt) {
             if ($this->requires_anonymous_answers()) {
                 $attempt->anonymize_answers();
             }
@@ -192,9 +219,8 @@ private function anonymize_users() {
 
     /**
      * Closes the attempts and ends the session.
-     * @return bool Whether or not this was successful
      */
-    public function end_session() {
+    public function end_session(): void {
         $this->anonymize_users();
         $this->data->status = 'notrunning';
         $this->data->sessionopen = 0;
@@ -203,23 +229,24 @@ public function end_session() {
         foreach ($this->attempts as $attempt) {
             $attempt->close_attempt($this->jazzquiz);
         }
-        return $this->save();
+        $this->save();
     }
 
     /**
      * Merge responses with 'from' to 'into'
+     *
      * @param int $slot Session question slot
      * @param string $from Original response text
      * @param string $into Merged response text
      */
-    public function merge_responses($slot, string $from, string $into) {
+    public function merge_responses(int $slot, string $from, string $into): void {
         global $DB;
-        $merge = new \stdClass();
+        $merge = new stdClass();
         $merge->sessionid = $this->data->id;
         $merge->slot = $slot;
         $merge->ordernum = count($DB->get_records('jazzquiz_merges', [
             'sessionid' => $this->data->id,
-            'slot' => $slot
+            'slot' => $slot,
         ]));
         $merge->original = $from;
         $merge->merged = $into;
@@ -228,13 +255,14 @@ public function merge_responses($slot, string $from, string $into) {
 
     /**
      * Undo the last merge of the specified question.
+     *
      * @param int $slot Session question slot
      */
-    public function undo_merge($slot) {
+    public function undo_merge(int $slot): void {
         global $DB;
         $merge = $DB->get_records('jazzquiz_merges', [
             'sessionid' => $this->data->id,
-            'slot' => $slot
+            'slot' => $slot,
         ], 'ordernum desc', '*', 0, 1);
         if (count($merge) > 0) {
             $merge = reset($merge);
@@ -244,15 +272,16 @@ public function undo_merge($slot) {
 
     /**
      * Get the merged responses.
+     *
      * @param int $slot Session question slot
-     * @param string[]['response'] $responses Original responses
-     * @return string[]['response'], int Merged responses and count of merges.
+     * @param array[] $responses 'response' contains original response
+     * @return int[]|string[] Merged responses and count of merges.
      */
-    public function get_merged_responses($slot, array $responses) : array {
+    public function get_merged_responses(int $slot, array $responses): array {
         global $DB;
         $merges = $DB->get_records('jazzquiz_merges', [
             'sessionid' => $this->data->id,
-            'slot' => $slot
+            'slot' => $slot,
         ]);
         $count = 0;
         foreach ($merges as $merge) {
@@ -267,17 +296,17 @@ public function get_merged_responses($slot, array $responses) : array {
     }
 
     /**
-     * Tells the session to go to the specified question number
-     * That jazzquiz_question is then returned
+     * Go to the specified question number.
+     *
      * @param int $questionid (from question bank)
      * @param int $questiontime in seconds ("<0" => no time, "0" => default)
-     * @return mixed[] $success, $question_time
+     * @return array $success, $question_time
      */
-    public function start_question($questionid, $questiontime) {
+    public function start_question(int $questionid, int $questiontime): array {
         global $DB;
         $transaction = $DB->start_delegated_transaction();
 
-        $sessionquestion = new \stdClass();
+        $sessionquestion = new stdClass();
         $sessionquestion->sessionid = $this->data->id;
         $sessionquestion->questionid = $questionid;
         $sessionquestion->questiontime = $questiontime;
@@ -285,7 +314,7 @@ public function start_question($questionid, $questiontime) {
         $sessionquestion->id = $DB->insert_record('jazzquiz_session_questions', $sessionquestion);
         $this->questions[$sessionquestion->slot] = $sessionquestion;
 
-        foreach ($this->attempts as &$attempt) {
+        foreach ($this->attempts as $attempt) {
             $attempt->create_missing_attempts($this);
             $attempt->save();
         }
@@ -301,52 +330,44 @@ public function start_question($questionid, $questiontime) {
     /**
      * Create a quiz attempt for the current user.
      */
-    public function initialize_attempt() {
+    public function initialize_attempt(): void {
         global $USER;
         // Check if this user has already joined the quiz.
-        foreach ($this->attempts as &$attempt) {
-            if ($attempt->data->userid == $USER->id) {
+        foreach ($this->attempts as $attempt) {
+            if ($attempt->userid == $USER->id) {
                 $attempt->create_missing_attempts($this);
                 $attempt->save();
-                $this->attempt = $attempt;
+                $this->myattempt = $attempt;
                 return;
             }
         }
         // For users who have not yet joined the quiz.
-        $this->attempt = new jazzquiz_attempt($this->jazzquiz->context);
-        $this->attempt->data->sessionid = $this->data->id;
-        if (isguestuser($USER->id)) {
-            $this->attempt->data->guestsession = $USER->sesskey;
-        } else {
-            $this->attempt->data->userid = $USER->id;
-        }
-        $this->attempt->data->status = jazzquiz_attempt::NOTSTARTED;
-        $this->attempt->data->timemodified = time();
-        $this->attempt->data->timestart = time();
-        $this->attempt->data->responded = null;
-        $this->attempt->data->timefinish = null;
-        $this->attempt->create_missing_attempts($this);
-        $this->attempt->save();
+        $this->myattempt = jazzquiz_attempt::create($this);
     }
 
-    public function update_attendance_for_current_user() {
+    /**
+     * Update attendance for the current user.
+     *
+     * @return void
+     */
+    public function update_attendance_for_current_user(): void {
         global $DB, $USER;
         if (isguestuser($USER->id)) {
             return;
         }
-        $numresponses = $this->attempt->total_answers();
+        $numresponses = $this->myattempt->total_answers();
         if ($numresponses === 0) {
             return;
         }
         $attendance = $DB->get_record('jazzquiz_attendance', [
             'sessionid' => $this->data->id,
-            'userid' => $USER->id
+            'userid' => $USER->id,
         ]);
         if ($attendance) {
             $attendance->numresponses = $numresponses;
             $DB->update_record('jazzquiz_attendance', $attendance);
         } else {
-            $attendance = new \stdClass();
+            $attendance = new stdClass();
             $attendance->sessionid = $this->data->id;
             $attendance->userid = $USER->id;
             $attendance->numresponses = $numresponses;
@@ -357,40 +378,25 @@ public function update_attendance_for_current_user() {
     /**
      * Load all the attempts for this session.
      */
-    public function load_attempts() {
+    public function load_attempts(): void {
         global $DB;
         $this->attempts = [];
-        $attempts = $DB->get_records('jazzquiz_attempts', ['sessionid' => $this->data->id]);
-        foreach ($attempts as $attempt) {
-            $this->attempts[$attempt->id] = new jazzquiz_attempt($this->jazzquiz->context, $attempt);
+        foreach ($DB->get_records('jazzquiz_attempts', ['sessionid' => $this->data->id]) as $attempt) {
+            $this->attempts[$attempt->id] = jazzquiz_attempt::get_by_id($attempt->id);
         }
     }
 
     /**
      * Load the current attempt for the user.
      */
-    public function load_attempt() {
-        global $DB, $USER;
-        $sql = 'SELECT *
-                  FROM {jazzquiz_attempts}
-                 WHERE sessionid = :sessionid
-                   AND (userid = :userid OR guestsession = :sesskey)';
-        $attempt = $DB->get_record_sql($sql, [
-            'sessionid' => $this->data->id,
-            'userid' => $USER->id,
-            'sesskey' => $USER->sesskey
-        ]);
-        if (!$attempt) {
-            $this->attempt = false;
-            return;
-        }
-        $this->attempt = new jazzquiz_attempt($this->jazzquiz->context, $attempt);
+    public function load_my_attempt(): void {
+        $this->myattempt = jazzquiz_attempt::get_by_session_for_current_user($this);
     }
 
     /**
      * Load all the session questions.
      */
-    public function load_session_questions() {
+    public function load_session_questions(): void {
         global $DB;
         $this->questions = $DB->get_records('jazzquiz_session_questions', ['sessionid' => $this->data->id], 'slot');
         foreach ($this->questions as $question) {
@@ -400,15 +406,16 @@ public function load_session_questions() {
     }
 
     /**
-     * Get the user IDs for who have attempted this session
+     * Get the user IDs for who have attempted this session.
+     *
      * @return int[] user IDs that have attempted this session
      */
-    public function get_users() {
+    public function get_users(): array {
         $users = [];
         foreach ($this->attempts as $attempt) {
             // Preview attempt means it's an instructor.
-            if ($attempt->data->status != jazzquiz_attempt::PREVIEW) {
-                $users[] = isguestuser($attempt->data->userid) ? null : $attempt->data->userid;
+            if ($attempt->status != jazzquiz_attempt::PREVIEW) {
+                $users[] = isguestuser($attempt->userid) ? null : $attempt->userid;
             }
         }
         return $users;
@@ -416,9 +423,10 @@ public function get_users() {
 
     /**
      * Get the total number of students participating in the quiz.
+     *
      * @return int
      */
-    public function get_student_count() {
+    public function get_student_count(): int {
         $count = count($this->attempts);
         if ($count > 0) {
             $count--; // The instructor also has an attempt.
@@ -430,19 +438,20 @@ public function get_student_count() {
 
     /**
      * Get the correct answer rendered in HTML.
+     *
      * @return string HTML
      */
-    public function get_question_right_response() {
+    public function get_question_right_response(): string {
         // Use the current user's attempt to render the question with the right response.
-        $quba = $this->attempt->quba;
+        $quba = $this->myattempt->quba;
         $slot = count($this->questions);
         $correctresponse = $quba->get_correct_response($slot);
         if (is_null($correctresponse)) {
             return 'No correct response';
         }
         $quba->process_action($slot, $correctresponse);
-        $this->attempt->save();
-        $reviewoptions = new \stdClass();
+        $this->myattempt->save();
+        $reviewoptions = new stdClass();
         $reviewoptions->rightanswer = 1;
         $reviewoptions->correctness = 1;
         $reviewoptions->specificfeedback = 1;
@@ -450,21 +459,22 @@ public function get_question_right_response() {
         /** @var output\renderer $renderer */
         $renderer = $this->jazzquiz->renderer;
         ob_start();
-        $html = $renderer->render_question($this->jazzquiz, $this->attempt->quba, $slot, true, $reviewoptions);
+        $html = $renderer->render_question($this->jazzquiz, $this->myattempt->quba, $slot, true, $reviewoptions);
         $htmlechoed = ob_get_clean();
         return $html . $htmlechoed;
     }
 
     /**
-     * Gets the results of the current question as an array
+     * Gets the results of the current question as an array.
+     *
      * @param int $slot
      * @return array
      */
-    public function get_question_results_list($slot) {
+    public function get_question_results_list(int $slot): array {
         $responses = [];
         $responded = 0;
         foreach ($this->attempts as $attempt) {
-            if ($attempt->data->responded != 1) {
+            if ($attempt->responded != 1) {
                 continue;
             }
             $attemptresponses = $attempt->get_response_data($slot);
@@ -477,11 +487,16 @@ public function get_question_results_list($slot) {
         return [
             'responses' => $responses,
             'responded' => $responded,
-            'student_count' => $this->get_student_count()
+            'student_count' => $this->get_student_count(),
         ];
     }
 
-    public function get_attendances() : array {
+    /**
+     * Get attendances for this session.
+     *
+     * @return array
+     */
+    public function get_attendances(): array {
         global $DB;
         $attendances = [];
         $records = $DB->get_records('jazzquiz_attendance', ['sessionid' => $this->data->id]);
@@ -489,14 +504,14 @@ public function get_attendances() : array {
             $attendances[] = [
                 'idnumber' => $this->user_idnumber_for_attendance($record->userid),
                 'name' => $this->user_name_for_attendance($record->userid),
-                'count' => $record->numresponses
+                'count' => $record->numresponses,
             ];
         }
         foreach ($this->attempts as $attempt) {
-            if (!$attempt->data->userid && $attempt->data->guestsession) {
+            if (!$attempt->userid && $attempt->guestsession) {
                 $attendances[] = [
                     'name' => get_string('anonymous', 'jazzquiz'),
-                    'count' => $attempt->total_answers()
+                    'count' => $attempt->total_answers(),
                 ];
             }
         }
@@ -504,11 +519,12 @@ public function get_attendances() : array {
     }
 
     /**
-     * @todo Temporary function. Should be removed at a later time.
+     * Get the question type for the specified slot.
+     *
      * @param int $slot
      * @return string
      */
-    public function get_question_type_by_slot($slot) : string {
+    public function get_question_type_by_slot(int $slot): string {
         global $DB;
         $id = $this->questions[$slot]->questionid;
         $question = $DB->get_record('question', ['id' => $id], 'qtype');
diff --git a/classes/jazzquiz_vote.php b/classes/jazzquiz_vote.php
index d8d7ee0..6b6275c 100755
--- a/classes/jazzquiz_vote.php
+++ b/classes/jazzquiz_vote.php
@@ -16,9 +16,11 @@
 
 namespace mod_jazzquiz;
 
-defined('MOODLE_INTERNAL') || die();
+use stdClass;
 
 /**
+ * A vote.
+ *
  * @package     mod_jazzquiz
  * @author      Sebastian S. Gundersen <sebastsg@stud.ntnu.no>
  * @copyright   2018 NTNU
@@ -27,39 +29,41 @@
 class jazzquiz_vote {
 
     /** @var int $sessionid */
-    protected $sessionid;
+    protected int $sessionid;
 
     /** @var int $slot */
-    protected $slot;
+    protected int $slot;
 
     /**
      * Constructor.
+     *
      * @param int $sessionid
      * @param int $slot
      */
-    public function __construct($sessionid, $slot = 0) {
+    public function __construct(int $sessionid, int $slot = 0) {
         $this->sessionid = $sessionid;
         $this->slot = $slot;
     }
 
     /**
      * Get the results for the vote.
+     *
      * @return array
      */
-    public function get_results() {
+    public function get_results(): array {
         global $DB;
-        $votes = $DB->get_records('jazzquiz_votes', [
+        return $DB->get_records('jazzquiz_votes', [
             'sessionid' => $this->sessionid,
-            'slot' => $this->slot
+            'slot' => $this->slot,
         ]);
-        return $votes;
     }
 
     /**
      * Check whether a user has voted or not.
+     *
      * @return bool
      */
-    public function has_user_voted() {
+    public function has_user_voted(): bool {
         global $DB, $USER;
         $allvotes = $DB->get_records('jazzquiz_votes', ['sessionid' => $this->sessionid]);
         if (!$allvotes) {
@@ -81,10 +85,11 @@ public function has_user_voted() {
 
     /**
      * Save the vote for a user.
+     *
      * @param int $voteid
      * @return bool
      */
-    public function save_vote($voteid) {
+    public function save_vote(int $voteid): bool {
         global $DB, $USER;
         if ($this->has_user_voted()) {
             return false;
@@ -109,12 +114,13 @@ public function save_vote($voteid) {
 
     /**
      * Insert the options for the vote.
+     *
      * @param int $jazzquizid
      * @param string $qtype
      * @param array $options
      * @param int $slot
      */
-    public function prepare_options($jazzquizid, string $qtype, array $options, $slot) {
+    public function prepare_options(int $jazzquizid, string $qtype, array $options, int $slot): void {
         global $DB;
 
         // Delete previous voting options for this session.
@@ -122,7 +128,7 @@ public function prepare_options($jazzquizid, string $qtype, array $options, $slo
 
         // Add to database.
         foreach ($options as $option) {
-            $vote = new \stdClass();
+            $vote = new stdClass();
             $vote->jazzquizid = $jazzquizid;
             $vote->sessionid = $this->sessionid;
             $vote->attempt = $option['text'];
diff --git a/classes/local/page_requirements_diff.php b/classes/local/page_requirements_diff.php
new file mode 100644
index 0000000..48bcf65
--- /dev/null
+++ b/classes/local/page_requirements_diff.php
@@ -0,0 +1,80 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace mod_jazzquiz\local;
+
+use page_requirements_manager;
+
+/**
+ * Handles new page requirements without needing to refresh the page.
+ *
+ * To load a question without refreshing the page, we need the JavaScript for the question.
+ * Moodle stores this in page_requirements_manager, but there is no way to read the JS that is required.
+ * This class takes in the manager and keeps the JS for when we want to get a diff.
+ * NOTE: This class is placed here because it will only ever be used by renderer::render_question_form()
+ * TODO: Look into removing this class in the future.
+ *
+ * @package   mod_jazzquiz
+ * @author    Sebastian S. Gundersen <sebastian@sgundersen.com>
+ * @copyright 2018 NTNU
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class page_requirements_diff extends page_requirements_manager {
+
+    /** @var array */
+    private array $beforeinitjs;
+
+    /** @var array */
+    private array $beforeamdjs;
+
+    /** @var array */
+    private array $beforecss;
+
+    /**
+     * Constructor.
+     *
+     * @param page_requirements_manager $manager
+     */
+    public function __construct(page_requirements_manager $manager) {
+        $this->beforeinitjs = $manager->jsinitcode;
+        $this->beforeamdjs = $manager->amdjscode;
+        $this->beforecss = $manager->cssurls;
+    }
+
+    /**
+     * Run an array_diff on the required JavaScript when this
+     * was constructed and the one passed to this function.
+     *
+     * @param page_requirements_manager $manager
+     * @return array the JavaScript that was added in-between constructor and this call.
+     */
+    public function get_js_diff(page_requirements_manager $manager): array {
+        $jsinitcode = array_diff($manager->jsinitcode, $this->beforeinitjs);
+        $amdjscode = array_diff($manager->amdjscode, $this->beforeamdjs);
+        return array_merge($jsinitcode, $amdjscode);
+    }
+
+    /**
+     * Run an array_diff on the required CSS when this was constructed and the one passed to this function.
+     *
+     * @param page_requirements_manager $manager
+     * @return array the CSS that was added in-between constructor and this call.
+     */
+    public function get_css_diff(page_requirements_manager $manager): array {
+        return array_keys(array_diff($manager->cssurls, $this->beforecss));
+    }
+
+}
diff --git a/classes/output/renderer.php b/classes/output/renderer.php
index cc91f67..39a6f40 100755
--- a/classes/output/renderer.php
+++ b/classes/output/renderer.php
@@ -16,71 +16,21 @@
 
 namespace mod_jazzquiz\output;
 
+use html_writer;
 use mod_jazzquiz\forms\view\student_start_form;
 use mod_jazzquiz\jazzquiz;
 use mod_jazzquiz\jazzquiz_attempt;
 use mod_jazzquiz\jazzquiz_session;
+use mod_jazzquiz\local\page_requirements_diff;
+use moodle_url;
+use moodleform;
+use question_usage_by_activity;
+use stdClass;
 
 defined('MOODLE_INTERNAL') || die;
 
 require_once($CFG->libdir . '/questionlib.php');
 
-/**
- * To load a question without refreshing the page, we need the JavaScript for the question.
- * Moodle stores this in page_requirements_manager, but there is no way to read the JS that is required.
- * This class takes in the manager and keeps the JS for when we want to get a diff.
- * NOTE: This class is placed here because it will only ever be used by renderer::render_question_form()
- * TODO: Look into removing this class in the future.
- * @package   mod_jazzquiz\output
- * @author    Sebastian S. Gundersen <sebastian@sgundersen.com>
- * @copyright 2018 NTNU
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-class page_requirements_diff extends \page_requirements_manager {
-
-    /** @var array $beforeinitjs */
-    private $beforeinitjs;
-
-    /** @var array $beforeamdjs */
-    private $beforeamdjs;
-
-    /** @var array $beforecss */
-    private $beforecss;
-
-    /**
-     * Constructor.
-     * @param \page_requirements_manager $manager
-     */
-    public function __construct(\page_requirements_manager $manager) {
-        $this->beforeinitjs = $manager->jsinitcode;
-        $this->beforeamdjs = $manager->amdjscode;
-        $this->beforecss = $manager->cssurls;
-    }
-
-    /**
-     * Run an array_diff on the required JavaScript when this
-     * was constructed and the one passed to this function.
-     * @param \page_requirements_manager $manager
-     * @return array the JavaScript that was added in-between constructor and this call.
-     */
-    public function get_js_diff(\page_requirements_manager $manager) : array {
-        $jsinitcode = array_diff($manager->jsinitcode, $this->beforeinitjs);
-        $amdjscode = array_diff($manager->amdjscode, $this->beforeamdjs);
-        return array_merge($jsinitcode, $amdjscode);
-    }
-
-    /**
-     * Run an array_diff on the required CSS when this
-     * was constructed and the one passed to this function.
-     * @param \page_requirements_manager $manager
-     * @return array the CSS that was added in-between constructor and this call.
-     */
-    public function get_css_diff(\page_requirements_manager $manager) : array {
-        return array_keys(array_diff($manager->cssurls, $this->beforecss));
-    }
-
-}
-
 /**
  * Quiz renderer
  *
@@ -94,10 +44,11 @@ class renderer extends \plugin_renderer_base {
 
     /**
      * Render the header for the page.
+     *
      * @param jazzquiz $jazzquiz
      * @param string $tab The active tab on the page
      */
-    public function header(jazzquiz $jazzquiz, string $tab) {
+    public function header(jazzquiz $jazzquiz, string $tab): void {
         echo $this->output->header();
         echo jazzquiz_view_tabs($jazzquiz, $tab);
     }
@@ -105,75 +56,72 @@ public function header(jazzquiz $jazzquiz, string $tab) {
     /**
      * Render the footer for the page.
      */
-    public function footer() {
+    public function footer(): void {
         echo $this->output->footer();
     }
 
     /**
      * For instructors.
-     * @param \moodleform $sessionform
+     *
+     * @param moodleform $sessionform
      */
-    public function start_session_form(\moodleform $sessionform) {
+    public function start_session_form(moodleform $sessionform): void {
         echo $this->render_from_template('jazzquiz/start_session', ['form' => $sessionform->render()]);
     }
 
     /**
      * For instructors.
+     *
      * @param jazzquiz $jazzquiz
      */
-    public function continue_session_form(jazzquiz $jazzquiz) {
+    public function continue_session_form(jazzquiz $jazzquiz): void {
         $cmid = $jazzquiz->cm->id;
         $id = $jazzquiz->data->id;
         echo $this->render_from_template('jazzquiz/continue_session', [
-            'path' => $this->page->url->get_path() . "?id=$cmid&quizid=$id&action=quizstart"
+            'path' => $this->page->url->get_path() . "?id=$cmid&quizid=$id&action=quizstart",
         ]);
     }
 
     /**
      * Show the "join quiz" form for students.
+     *
      * @param student_start_form $form
      * @param jazzquiz_session $session
-     * @throws \moodle_exception
      */
-    public function join_quiz_form(student_start_form $form, jazzquiz_session $session) {
+    public function join_quiz_form(student_start_form $form, jazzquiz_session $session): void {
         $anonstr = ['', 'anonymous_answers_info', 'fully_anonymous_info', 'nonanonymous_session_info'];
         echo $this->render_from_template('jazzquiz/join_session', [
             'name' => $session->data->name,
-            'started' => ($session->attempt !== false),
+            'started' => $session->myattempt !== false,
             'anonymity_info' => get_string($anonstr[$session->data->anonymity], 'jazzquiz'),
-            'form' => $form->render()
+            'form' => $form->render(),
         ]);
     }
 
     /**
      * Show the "quiz not running" page for students.
+     *
      * @param int $cmid the course module id for the quiz
-     * @throws \moodle_exception
      */
-    public function quiz_not_running($cmid) {
+    public function quiz_not_running(int $cmid): void {
         echo $this->render_from_template('jazzquiz/no_session', [
-            'reload' => $this->page->url->get_path() . '?id=' . $cmid
+            'reload' => $this->page->url->get_path() . "?id=$cmid",
         ]);
     }
 
-
     /**
-     * Shows the "guests not allowed" page when trying to access a
-     * quiz which does not allow guests in guest mode.
-     * @throws \moodle_exception
+     * Shows the "guests not allowed" page when trying to access a quiz which does not allow guests in guest mode.
      */
-    public function guests_not_allowed() {
+    public function guests_not_allowed(): void {
         echo $this->render_from_template('jazzquiz/guests_not_allowed', []);
     }
 
-
-
     /**
-     * Renders the quiz to the page
+     * Renders the quiz to the page.
+     *
      * @param jazzquiz_session $session
-     * @throws \moodle_exception
      */
-    public function render_quiz(jazzquiz_session $session) {
+    public function render_quiz(jazzquiz_session $session): void {
         $this->require_quiz($session);
         $buttons = function($buttons) {
             $result = [];
@@ -181,7 +129,7 @@ public function render_quiz(jazzquiz_session $session) {
                 $result[] = [
                     'icon' => $button[0],
                     'id' => $button[1],
-                    'text' => get_string($button[1], 'jazzquiz')
+                    'text' => get_string($button[1], 'jazzquiz'),
                 ];
             }
             return $result;
@@ -198,38 +146,40 @@ public function render_quiz(jazzquiz_session $session) {
                 ['expand', 'fullscreen'],
                 ['window-close', 'quit'],
                 ['square-o', 'responses'],
-                ['square-o', 'answer']
+                ['square-o', 'answer'],
             ]),
-            'instructor' => $session->jazzquiz->is_instructor()
+            'instructor' => $session->jazzquiz->is_instructor(),
         ]);
     }
 
     /**
-     * Render the question specified by slot
+     * Render the question specified by slot.
+     *
      * @param jazzquiz $jazzquiz
-     * @param \question_usage_by_activity $quba
+     * @param question_usage_by_activity $quba
      * @param int $slot
-     * @param bool $review Whether or not we're reviewing the attempt
-     * @param string|\stdClass $reviewoptions Can be string for overall actions like "edit" or an object of review options
+     * @param bool $review Are we reviewing the attempt?
+     * @param string|stdClass $reviewoptions Review options as either string or object
      * @return string the HTML fragment for the question
      */
-    public function render_question(jazzquiz $jazzquiz, $quba, $slot, bool $review, $reviewoptions) : string {
+    public function render_question(jazzquiz $jazzquiz, question_usage_by_activity $quba, int $slot, bool $review,
+                                    string|stdClass $reviewoptions): string {
         $displayoptions = $jazzquiz->get_display_options($review, $reviewoptions);
         $quba->render_question_head_html($slot);
         return $quba->render_question($slot, $displayoptions, $slot);
     }
 
     /**
-     * Render a specific question in its own form so it can be submitted
-     * independently of the rest of the questions
+     * Render a specific question in its own form, so it can be submitted
+     * independently of the rest of the questions.
+     *
      * @param int $slot the id of the question we're rendering
      * @param jazzquiz_attempt $attempt
      * @param jazzquiz $jazzquiz
      * @param bool $instructor
      * @return string[] html, javascript, css
-     * @throws \moodle_exception
      */
-    public function render_question_form($slot, jazzquiz_attempt $attempt, jazzquiz $jazzquiz, bool $instructor) : array {
+    public function render_question_form(int $slot, jazzquiz_attempt $attempt, jazzquiz $jazzquiz, bool $instructor): array {
         $differ = new page_requirements_diff($this->page->requires);
         ob_start();
         $questionhtml = $this->render_question($jazzquiz, $attempt->quba, $slot, false, '');
@@ -239,25 +189,23 @@ public function render_question_form($slot, jazzquiz_attempt $attempt, jazzquiz
         $output = $this->render_from_template('jazzquiz/question', [
             'instructor' => $instructor,
             'question' => $questionhtml . $questionhtmlechoed,
-            'slot' => $slot
+            'slot' => $slot,
         ]);
         return [$output, $js, $css];
     }
 
     /**
-     * Renders and echos the home page for the responses section
-     * @param \moodle_url $url
-     * @param \stdClass[] $sessions
+     * Renders and echos the home page for the responses section.
+     *
+     * @param moodle_url $url
+     * @param stdClass[] $sessions
      * @param int $selectedid
      * @return array
-     * @throws \coding_exception
      */
-    public function get_select_session_context(\moodle_url $url, array $sessions, $selectedid) : array {
+    public function get_select_session_context(moodle_url $url, array $sessions, int $selectedid): array {
         $selecturl = clone($url);
         $selecturl->param('action', 'view');
-        usort($sessions, function ($a, $b) {
-            return strcmp(strtolower($a->name), strtolower($b->name));
-        });
+        usort($sessions, fn(stdClass $a, stdClass $b) => strcmp(strtolower($a->name), strtolower($b->name)));
         return [
             'method' => 'get',
             'action' => $selecturl->out_omit_querystring(),
@@ -268,28 +216,28 @@ public function get_select_session_context(\moodle_url $url, array $sessions, $s
                 return [
                     'name' => $session->name,
                     'value' => $session->id,
-                    'selected' => intval($selectedid) === intval($session->id),
-                    'optgroup' => false
+                    'selected' => $selectedid === (int)$session->id,
+                    'optgroup' => false,
                 ];
             }, $sessions),
             'params' => array_map(function ($key, $value) {
                 return [
                     'name' => $key,
-                    'value' => $value
+                    'value' => $value,
                 ];
             }, array_keys($selecturl->params()), $selecturl->params()),
         ];
     }
 
     /**
-     * Render the list questions view for the edit page
+     * Render the list questions view for the edit page.
+     *
      * @param jazzquiz $jazzquiz
      * @param array $questions Array of questions
      * @param string $questionbankview HTML for the question bank view
-     * @param \moodle_url $url
-     * @throws \moodle_exception
+     * @param moodle_url $url
      */
-    public function list_questions(jazzquiz $jazzquiz, array $questions, string $questionbankview, \moodle_url $url) {
+    public function list_questions(jazzquiz $jazzquiz, array $questions, string $questionbankview, moodle_url $url): void {
         $slot = 1;
         $list = [];
         foreach ($questions as $question) {
@@ -303,28 +251,34 @@ public function list_questions(jazzquiz $jazzquiz, array $questions, string $que
                 'last' => $slot === count($questions),
                 'slot' => $slot,
                 'editurl' => $editurl,
-                'icon' => print_question_icon($question->question)
+                'icon' => print_question_icon($question->question),
             ];
             $slot++;
         }
         echo $this->render_from_template('jazzquiz/edit_question_list', [
             'questions' => $list,
-            'qbank' => $questionbankview
+            'qbank' => $questionbankview,
         ]);
         $this->require_edit($jazzquiz->cm->id);
     }
 
-    public function session_is_open_error() {
-        echo \html_writer::tag('h3', get_string('edit_page_open_session_error', 'jazzquiz'));
+    /**
+     * Display header stating the session is open.
+     *
+     * @return void
+     */
+    public function session_is_open_error(): void {
+        echo html_writer::tag('h3', get_string('edit_page_open_session_error', 'jazzquiz'));
     }
 
     /**
+     * View session report.
+     *
      * @param jazzquiz_session $session
-     * @param \moodle_url $url
-     * @return mixed[]
-     * @throws \coding_exception
+     * @param moodle_url $url
+     * @return array
      */
-    public function view_session_report(jazzquiz_session $session, \moodle_url $url) : array {
+    public function view_session_report(jazzquiz_session $session, moodle_url $url): array {
         $attempt = reset($session->attempts);
         if (!$attempt) {
             $strnoattempts = get_string('no_attempts_found', 'jazzquiz');
@@ -342,7 +296,7 @@ public function view_session_report(jazzquiz_session $session, \moodle_url $url)
                 'name' => str_replace('{IMPROV}', '', $question->name),
                 'type' => $attempt->quba->get_question_attempt($qubaslot)->get_question()->get_type_name(),
                 'description' => $question->questiontext,
-                'responses' => $results['responses']
+                'responses' => $results['responses'],
             ];
         }
 
@@ -362,43 +316,34 @@ public function view_session_report(jazzquiz_session $session, \moodle_url $url)
                 'count_answered' => count($attendances),
                 'cmid' => $jazzquiz->cm->id,
                 'quizid' => $jazzquiz->data->id,
-                'id' => $session->data->id
-            ]
+                'id' => $session->data->id,
+            ],
         ];
     }
 
     /**
+     * Require the core javascript.
+     *
      * @param jazzquiz_session $session
      */
-    public function require_core(jazzquiz_session $session) {
+    public function require_core(jazzquiz_session $session): void {
         $this->page->requires->js_call_amd('mod_jazzquiz/core', 'initialize', [
             $session->jazzquiz->cm->id,
             $session->jazzquiz->data->id,
             $session->data->id,
-            $session->attempt ? $session->attempt->data->id : 0,
-            sesskey()
+            $session->myattempt?->id ?? 0,
+            sesskey(),
         ]);
     }
 
     /**
+     * Require the quiz javascript based on the current user's role.
+     *
      * @param jazzquiz_session $session
      */
-    public function require_quiz(jazzquiz_session $session) {
+    public function require_quiz(jazzquiz_session $session): void {
         $this->require_core($session);
-
-        // question/qengine.js is deprecated for Moodle versions after 401.
-        // Checks moodle version in order to determine which question engine
-        // to use, making the jazzquiz independent of the Moodle version.
-        global $CFG;
-        include $CFG->dirroot.'/version.php';
-        $branch = $CFG->branch;
-
-        if ( (int) $branch <= 401 ) {
-            $this->page->requires->js('/question/qengine.js');
-        } else {
-            $this->page->requires->js_call_amd('core_question/question_engine', 'initialize');
-        }
-        
+        $this->page->requires->js_call_amd('core_question/question_engine', 'initSubmitButton');
         if ($session->jazzquiz->is_instructor()) {
             $count = count($session->jazzquiz->questions);
             $params = [$count, false, []];
@@ -409,18 +354,22 @@ public function require_quiz(jazzquiz_session $session) {
     }
 
     /**
+     * Require the edit javascript for the instructor.
+     *
      * @param int $cmid
      */
-    public function require_edit($cmid) {
+    public function require_edit(int $cmid): void {
         $this->page->requires->js('/mod/jazzquiz/js/sortable.min.js');
         $this->page->requires->js_call_amd('mod_jazzquiz/edit', 'initialize', [$cmid]);
     }
 
     /**
+     * Require the review javascript for the instructor.
+     *
      * @param jazzquiz_session $session
      * @param array $slots
      */
-    public function require_review(jazzquiz_session $session, array $slots) {
+    public function require_review(jazzquiz_session $session, array $slots): void {
         $this->require_core($session);
         $count = count($session->jazzquiz->questions);
         $params = [$count, true, $slots];
diff --git a/classes/privacy/provider.php b/classes/privacy/provider.php
index 2a67ae0..c18123e 100644
--- a/classes/privacy/provider.php
+++ b/classes/privacy/provider.php
@@ -26,14 +26,15 @@
 
 namespace mod_jazzquiz\privacy;
 
+use context;
+use context_module;
 use core_privacy\local\metadata\collection;
 use core_privacy\local\request\approved_contextlist;
 use core_privacy\local\request\contextlist;
 use core_privacy\local\request\helper;
 use core_privacy\local\request\transform;
 use core_privacy\local\request\writer;
-
-defined('MOODLE_INTERNAL') || die();
+use stdClass;
 
 /**
  * Privacy Subsystem implementation for mod_jazzquiz.
@@ -51,11 +52,12 @@ class provider implements
     \core_privacy\local\request\plugin\provider {
 
     /**
-     * Returns meta data about this system.
-     * @param   collection $items The initialised collection to add metadata to.
-     * @return  collection  A listing of user data stored through this system.
+     * Returns metadata about this system.
+     *
+     * @param collection $items The initialised collection to add metadata to.
+     * @return collection A listing of user data stored through this system.
      */
-    public static function get_metadata(collection $items) : collection {
+    public static function get_metadata(collection $items): collection {
         // The table 'jazzquiz' stores a record for each JazzQuiz.
         // It does not contain user personal data, but data is returned from it for contextual requirements.
 
@@ -66,7 +68,7 @@ public static function get_metadata(collection $items) : collection {
             'responded' => 'privacy:metadata:jazzquiz_attempts:responded',
             'timestart' => 'privacy:metadata:jazzquiz_attempts:timestart',
             'timefinish' => 'privacy:metadata:jazzquiz_attempts:timefinish',
-            'timemodified' => 'privacy:metadata:jazzquiz_attempts:timemodified'
+            'timemodified' => 'privacy:metadata:jazzquiz_attempts:timemodified',
         ], 'privacy:metadata:jazzquiz_attempts');
 
         // The 'jazzquiz_merges' table is used to merge one question attempt into another in a JazzQuiz session.
@@ -92,10 +94,10 @@ public static function get_metadata(collection $items) : collection {
     /**
      * Get the list of contexts where the specified user has attempted a JazzQuiz.
      *
-     * @param   int $userid The user to search.
-     * @return  contextlist  $contextlist The contextlist containing the list of contexts used in this plugin.
+     * @param int $userid The user to search.
+     * @return contextlist  $contextlist The contextlist containing the list of contexts used in this plugin.
      */
-    public static function get_contexts_for_userid(int $userid) : contextlist {
+    public static function get_contexts_for_userid(int $userid): contextlist {
         $sql = 'SELECT cx.id
                   FROM {context} cx
                   JOIN {course_modules} cm
@@ -115,24 +117,18 @@ public static function get_contexts_for_userid(int $userid) : contextlist {
         $contextlist->add_from_sql($sql, [
             'contextlevel' => CONTEXT_MODULE,
             'modname' => 'jazzquiz',
-            'userid' => $userid
+            'userid' => $userid,
         ]);
         return $contextlist;
     }
 
     /**
-     * Export all user data for the specified user, in the specified contexts.
+     * Export all user data for the specified user in the specified contexts.
      *
-     * @param   approved_contextlist $contextlist The approved contexts to export information for.
-     * @throws \coding_exception
-     * @throws \dml_exception
-     * @throws \moodle_exception
+     * @param approved_contextlist $contextlist The approved contexts to export information for.
      */
-    public static function export_user_data(approved_contextlist $contextlist) {
+    public static function export_user_data(approved_contextlist $contextlist): void {
         global $DB;
-        if (empty($contextlist)) {
-            return;
-        }
         $user = $contextlist->get_user();
         list($contextsql, $contextparams) = $DB->get_in_or_equal($contextlist->get_contextids(), SQL_PARAMS_NAMED);
         $sql = "SELECT cm.id AS cmid
@@ -161,7 +157,7 @@ public static function export_user_data(approved_contextlist $contextlist) {
         // Fetch the individual quizzes.
         $quizzes = $DB->get_recordset_sql($sql, $params);
         foreach ($quizzes as $quiz) {
-            $context = \context_module::instance($quiz->cmid);
+            $context = context_module::instance($quiz->cmid);
             $data = helper::get_context_data($context, $user);
             helper::export_context_files($context, $user);
             writer::with_context($context)->export_data([], $data);
@@ -170,7 +166,13 @@ public static function export_user_data(approved_contextlist $contextlist) {
         static::export_quiz_attempts($contextlist);
     }
 
-    protected static function export_quiz_attempts(approved_contextlist $contextlist) {
+    /**
+     * Export all quiz attempts for the specified user in the specified contexts.
+     *
+     * @param approved_contextlist $contextlist
+     * @return void
+     */
+    protected static function export_quiz_attempts(approved_contextlist $contextlist): void {
         global $DB;
         $userid = $contextlist->get_user()->id;
         $sql = "SELECT cx.id              AS contextid,
@@ -198,12 +200,12 @@ protected static function export_quiz_attempts(approved_contextlist $contextlist
         $params = [
             'contextlevel' => CONTEXT_MODULE,
             'userid' => $userid,
-            'modname' => 'jazzquiz'
+            'modname' => 'jazzquiz',
         ];
         $attempts = $DB->get_recordset_sql($sql, $params);
         foreach ($attempts as $attempt) {
             $options = new \question_display_options();
-            $options->context = \context_module::instance($attempt->cmid);
+            $options->context = context_module::instance($attempt->cmid);
             $attemptsubcontext = [$attempt->sessionname . ' ' . $attempt->sessionid . ' ' . $attempt->id];
             // This attempt was made by the user. They 'own' all data on it. Store the question usage data.
             \core_question\privacy\provider::export_question_usage(
@@ -212,10 +214,10 @@ protected static function export_quiz_attempts(approved_contextlist $contextlist
                 $attemptsubcontext,
                 $attempt->qubaid,
                 $options,
-                true
+                true,
             );
             // Store the quiz attempt data.
-            $data = new \stdClass();
+            $data = new stdClass();
             $data->responded = $attempt->responded;
             $data->timestart = transform::datetime($attempt->timestart);
             $data->timefinish = transform::datetime($attempt->timefinish);
@@ -228,9 +230,9 @@ protected static function export_quiz_attempts(approved_contextlist $contextlist
     /**
      * Delete all data for all users in the specified context.
      *
-     * @param   \context $context The specific context to delete data for.
+     * @param context $context The specific context to delete data for.
      */
-    public static function delete_data_for_all_users_in_context(\context $context) {
+    public static function delete_data_for_all_users_in_context(context $context): void {
         global $DB;
         if ($context->contextlevel != CONTEXT_MODULE) {
             return;
@@ -249,9 +251,9 @@ public static function delete_data_for_all_users_in_context(\context $context) {
     /**
      * Delete all user data for the specified user, in the specified contexts.
      *
-     * @param   approved_contextlist $contextlist The approved contexts and user information to delete information for.
+     * @param approved_contextlist $contextlist Approved contexts and user information to delete information for.
      */
-    public static function delete_data_for_user(approved_contextlist $contextlist) {
+    public static function delete_data_for_user(approved_contextlist $contextlist): void {
         global $DB;
         if (empty($contextlist->count())) {
             return;
diff --git a/db/access.php b/db/access.php
index 4a32cf9..532a8ba 100755
--- a/db/access.php
+++ b/db/access.php
@@ -16,92 +16,68 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-/* Capability definitions for the jazzquiz module.
+/**
+ * Capability definitions for the jazzquiz module.
  *
- * The capabilities are loaded into the database table when the module is
- * installed or updated. Whenever the capability definitions are updated,
- * the module version number should be bumped up.
- *
- * The system has four possible values for a capability:
- * CAP_ALLOW, CAP_PREVENT, CAP_PROHIBIT, and inherit (not set).
- *
- * CAPABILITY NAMING CONVENTION
- *
- * It is important that capability names are unique. The naming convention
- * Capabilities specific to modules and blocks is as follows:
- *   [mod/block]/<component_name>:<capabilityname>
- *
- * component_name should be the same as the directory name of the mod or block.
- *
- * Core moodle capabilities are defined thus:
- *   moodle/<capabilityclass>:<capabilityname>
- *
- * Examples:
- *   mod/forum:viewpost
- *   block/recent_activity:view
- *   moodle/site:deleteuser
- *
- * The variable name for the capability definitions array follows the format:
- *   $<componenttype>_<component_name>_capabilities
- *
- * For the core capabilities, the variable is $moodle_capabilities.
+ * @package mod_jazzquiz
+ * @copyright 2024 NTNU
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
 $capabilities = [
     // Can start a quiz and move on to the next question.
     // NB: must have 'attempt' as well to be able to see the questions.
     'mod/jazzquiz:control' => [
-        'captype'      => 'write',
+        'captype' => 'write',
         'contextlevel' => CONTEXT_MODULE,
-        'legacy'       => [
-            'teacher'        => CAP_ALLOW,
+        'legacy' => [
+            'teacher' => CAP_ALLOW,
             'editingteacher' => CAP_ALLOW,
-            'manager'        => CAP_ALLOW
-        ]
+            'manager' => CAP_ALLOW,
+        ],
     ],
 
     // Can try to answer the quiz.
     'mod/jazzquiz:attempt' => [
-        'captype'      => 'write',
+        'captype' => 'write',
         'contextlevel' => CONTEXT_MODULE,
-        'legacy'       => [
-            'student'        => CAP_ALLOW,
-            'teacher'        => CAP_ALLOW,
+        'legacy' => [
+            'student' => CAP_ALLOW,
+            'teacher' => CAP_ALLOW,
             'editingteacher' => CAP_ALLOW,
-            'manager'        => CAP_ALLOW
-        ]
+            'manager' => CAP_ALLOW,
+        ],
     ],
 
     // Can see who gave what answer.
     'mod/jazzquiz:seeresponses' => [
-        'captype'      => 'read',
+        'captype' => 'read',
         'contextlevel' => CONTEXT_MODULE,
-        'legacy'       => [
-            'teacher'        => CAP_ALLOW,
+        'legacy' => [
+            'teacher' => CAP_ALLOW,
             'editingteacher' => CAP_ALLOW,
-            'manager'        => CAP_ALLOW
-        ]
+            'manager' => CAP_ALLOW,
+        ],
     ],
 
     // Can add / delete / update questions.
     'mod/jazzquiz:editquestions' => [
-        'captype'      => 'write',
+        'captype' => 'write',
         'contextlevel' => CONTEXT_MODULE,
-        'legacy'       => [
+        'legacy' => [
             'editingteacher' => CAP_ALLOW,
-            'manager'        => CAP_ALLOW
-        ]
+            'manager' => CAP_ALLOW,
+        ],
     ],
 
     // Can add an instance of this module to a course.
     'mod/jazzquiz:addinstance' => [
-        'captype'      => 'write',
+        'captype' => 'write',
         'contextlevel' => CONTEXT_COURSE,
-        'legacy'       => [
+        'legacy' => [
             'editingteacher' => CAP_ALLOW,
-            'coursecreator'  => CAP_ALLOW,
-            'manager'        => CAP_ALLOW
-        ]
+            'coursecreator' => CAP_ALLOW,
+            'manager' => CAP_ALLOW,
+        ],
     ],
 ];
-
diff --git a/db/upgrade.php b/db/upgrade.php
index 4b1d59f..28461ea 100755
--- a/db/upgrade.php
+++ b/db/upgrade.php
@@ -14,9 +14,21 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-defined('MOODLE_INTERNAL') || die();
+/**
+ * Upgrade script for JazzQuiz.
+ *
+ * @package mod_jazzquiz
+ * @copyright 2024 NTNU
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 
-function xmldb_jazzquiz_upgrade($oldversion) {
+/**
+ * The upgrade script for JazzQuiz.
+ *
+ * @package mod_jazzquiz
+ * @param int $oldversion
+ */
+function xmldb_jazzquiz_upgrade(int $oldversion): bool {
     global $DB;
     $dbman = $DB->get_manager();
     if ($oldversion < 2019061911) {
diff --git a/edit.php b/edit.php
index 17475cd..eb89321 100755
--- a/edit.php
+++ b/edit.php
@@ -26,6 +26,10 @@
 
 namespace mod_jazzquiz;
 
+use core_question\local\bank\question_edit_contexts;
+use mod_jazzquiz\bank\add_questions_bank_view;
+use moodle_url;
+
 require_once('../../config.php');
 require_once($CFG->dirroot . '/mod/jazzquiz/lib.php');
 require_once($CFG->dirroot . '/mod/jazzquiz/locallib.php');
@@ -35,83 +39,53 @@
 
 /**
  * Check if this JazzQuiz has an open session.
+ *
  * @param int $jazzquizid
  * @return bool
- * @throws \dml_exception
  */
-function jazzquiz_session_open($jazzquizid) {
+function jazzquiz_session_open(int $jazzquizid): bool {
     global $DB;
     $sessions = $DB->get_records('jazzquiz_sessions', [
         'jazzquizid' => $jazzquizid,
-        'sessionopen' => 1
+        'sessionopen' => 1,
     ]);
     return count($sessions) > 0;
 }
 
 /**
- * Gets the question bank view based on the options passed in at the page setup.
- * @param \core_question\local\bank\question_edit_contexts $contexts
+ * Outputs the list of questions using the renderer for jazzquiz.
+ *
+ * @param question_edit_contexts $contexts
  * @param jazzquiz $jazzquiz
- * @param \moodle_url $url
+ * @param moodle_url $url
  * @param array $pagevars
- * @return string
- * @throws \coding_exception
  */
-function get_qbank_view(
-    \core_question\local\bank\question_edit_contexts $contexts,
-    jazzquiz $jazzquiz, \moodle_url $url, array $pagevars) {
-
-    $qperpage = optional_param('qperpage', 10, PARAM_INT);
-    $qpage = optional_param('qpage', 0, PARAM_INT);
-    $newpagevars = [
-        'qpage' => $qpage,
-        'qperpage' => $qperpage,
-        'cat' => $pagevars['cat'],
-        'recurse' => $pagevars['recurse'],
-        'showhidden' => $pagevars['showhidden'],
-        'qbshowtext' => $pagevars['qbshowtext']
-    ];
-    // Capture question bank display in buffer to have the renderer render output.
+function list_questions(question_edit_contexts $contexts, jazzquiz $jazzquiz, moodle_url $url, array $pagevars): void {
     ob_start();
-    $questionbank = new bank\jazzquiz_question_bank_view($contexts, $url, $jazzquiz->course, $jazzquiz->cm);
-    $questionbank->display($newpagevars, 'editq');
-    return ob_get_clean();
-}
-
-/**
- * Echos the list of questions using the renderer for jazzquiz.
- * @param \core_question\local\bank\question_edit_contexts $contexts
- * @param jazzquiz $jazzquiz
- * @param \moodle_url $url
- * @param array $pagevars
- * @throws \coding_exception
- * @throws \moodle_exception
- */
-function list_questions(
-    \core_question\local\bank\question_edit_contexts $contexts,
-    jazzquiz $jazzquiz, \moodle_url $url, array $pagevars) {
-
-    $qbankview = get_qbank_view($contexts, $jazzquiz, $url, $pagevars);
+    $questionbank = new add_questions_bank_view($contexts, $url, $jazzquiz->course, $jazzquiz->cm, $pagevars);
+    $questionbank->display();
+    $qbankview = ob_get_clean();
     $jazzquiz->renderer->list_questions($jazzquiz, $jazzquiz->questions, $qbankview, $url);
 }
 
 /**
+ * Edit question order.
+ *
  * @param jazzquiz $jazzquiz
- * @throws \coding_exception
  */
-function jazzquiz_edit_order(jazzquiz $jazzquiz) {
+function jazzquiz_edit_order(jazzquiz $jazzquiz): void {
     $order = required_param('order', PARAM_RAW);
     $order = json_decode($order);
     $jazzquiz->set_question_order($order);
 }
 
 /**
+ * Add a question to the quiz.
+ *
  * @param jazzquiz $jazzquiz
- * @param \moodle_url $url
- * @throws \coding_exception
- * @throws \moodle_exception
+ * @param moodle_url $url
  */
-function jazzquiz_edit_add_question(jazzquiz $jazzquiz, \moodle_url $url) {
+function jazzquiz_edit_add_question(jazzquiz $jazzquiz, moodle_url $url): void {
     $questionids = required_param('questionids', PARAM_TEXT);
     $questionids = explode(',', $questionids);
     foreach ($questionids as $questionid) {
@@ -123,26 +97,24 @@ function jazzquiz_edit_add_question(jazzquiz $jazzquiz, \moodle_url $url) {
 }
 
 /**
+ * Edit a question.
+ *
  * @param jazzquiz $jazzquiz
- * @throws \coding_exception
  */
-function jazzquiz_edit_edit_question(jazzquiz $jazzquiz) {
+function jazzquiz_edit_edit_question(jazzquiz $jazzquiz): void {
     $questionid = required_param('questionid', PARAM_INT);
     $jazzquiz->edit_question($questionid);
 }
 
 /**
+ * Show list of questions.
+ *
  * @param jazzquiz $jazzquiz
- * @param \core_question\local\bank\question_edit_contexts $contexts
- * @param \moodle_url $url
- * @param $pagevars
- * @throws \coding_exception
- * @throws \moodle_exception
+ * @param question_edit_contexts $contexts
+ * @param moodle_url $url
+ * @param array $pagevars
  */
-function jazzquiz_edit_qlist(
-    jazzquiz $jazzquiz, \core_question\local\bank\question_edit_contexts $contexts,
-    \moodle_url $url, array $pagevars) {
-
+function jazzquiz_edit_qlist(jazzquiz $jazzquiz, question_edit_contexts $contexts, moodle_url $url, array $pagevars): void {
     $jazzquiz->renderer->header($jazzquiz, 'edit');
     list_questions($contexts, $jazzquiz, $url, $pagevars);
     $jazzquiz->renderer->footer();
@@ -151,7 +123,7 @@ function jazzquiz_edit_qlist(
 /**
  * View edit page.
  */
-function jazzquiz_edit() {
+function jazzquiz_edit(): void {
     global $PAGE, $COURSE;
     $action = optional_param('action', 'listquestions', PARAM_ALPHA);
 
diff --git a/index.php b/index.php
index f73473e..f4754f7 100755
--- a/index.php
+++ b/index.php
@@ -26,11 +26,8 @@
 require_once('../../config.php');
 require_once('lib.php');
 
-$id = required_param('id', PARAM_INT); // Course ID.
-$course = $DB->get_record('course', ['id' => $id]);
-if (!$course) {
-    error('Course ID is incorrect');
-}
+$courseid = required_param('id', PARAM_INT);
+$course = $DB->get_record('course', ['id' => $courseid], '*', MUST_EXIST);
 
 $PAGE->set_url(new moodle_url('/mod/jazzquiz/index.php', ['id' => $course->id]));
 require_course_login($course);
@@ -72,9 +69,7 @@
 }
 
 foreach ($jazzquizzes as $jazzquiz) {
-    $url = new moodle_url('/mod/jazzquiz/view.php', [
-        'cmid' => $jazzquiz->coursemodule
-    ]);
+    $url = new moodle_url('/mod/jazzquiz/view.php', ['cmid' => $jazzquiz->coursemodule]);
     if (!$jazzquiz->visible) {
         // Show dimmed if the mod is hidden.
         $link = '<a class="dimmed" href="' . $url . '">' . $jazzquiz->name . '</a>';
@@ -91,4 +86,3 @@
 
 echo html_writer::table($table);
 echo $OUTPUT->footer();
-
diff --git a/lang/en/jazzquiz.php b/lang/en/jazzquiz.php
index 0c0f145..777a001 100755
--- a/lang/en/jazzquiz.php
+++ b/lang/en/jazzquiz.php
@@ -177,8 +177,7 @@
 
 // Instructions.
 $string['instructions_for_student'] = '<p>Please wait for the instructor to start the quiz.</p>';
-$string['instructions_for_instructor'] = '
-    <h3>Please make sure to read the instructions:</h3>
+$string['instructions_for_instructor'] = '<h3>Please make sure to read the instructions:</h3>
     <p>There are hotkeys available, which can be used when an input field is not focused.</p>
     <table>
         <tr>
diff --git a/lib.php b/lib.php
index 75f85bb..bf824f5 100755
--- a/lib.php
+++ b/lib.php
@@ -15,7 +15,7 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * Library of functions and constants for module jazzquiz
+ * Library of functions and constants for module jazzquiz.
  *
  * @package   mod_jazzquiz
  * @author    John Hoopes <moodle@madisoncreativeweb.com>
@@ -23,19 +23,15 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
+use mod_jazzquiz\jazzquiz_session;
 
 /**
- * Given an object containing all the necessary data,
- * (defined by the form in mod.html) this function
- * will create a new instance and return the id number
- * of the new instance.
+ * Create a new JazzQuiz instance.
  *
- * @param \stdClass $jazzquiz An object from the form in mod.html
+ * @param stdClass $jazzquiz An object from the form in mod.html
  * @return int The id of the newly inserted jazzquiz record
- * @throws dml_exception
  */
-function jazzquiz_add_instance(\stdClass $jazzquiz) {
+function jazzquiz_add_instance(stdClass $jazzquiz): int {
     global $DB;
     $jazzquiz->timemodified = time();
     $jazzquiz->timecreated = time();
@@ -44,15 +40,12 @@ function jazzquiz_add_instance(\stdClass $jazzquiz) {
 }
 
 /**
- * Given an object containing all the necessary data,
- * (defined by the form in mod.html) this function
- * will update an existing instance with new data.
+ * Update JazzQuiz instance with new data.
  *
- * @param \stdClass $jazzquiz An object from the form in mod.html
- * @return boolean Success/Fail
- * @throws dml_exception
+ * @param stdClass $jazzquiz An object from the form in mod.html
+ * @return bool Success/Fail
  */
-function jazzquiz_update_instance(\stdClass $jazzquiz) {
+function jazzquiz_update_instance(stdClass $jazzquiz): bool {
     global $DB;
     $jazzquiz->timemodified = time();
     $jazzquiz->id = $jazzquiz->instance;
@@ -61,45 +54,35 @@ function jazzquiz_update_instance(\stdClass $jazzquiz) {
 }
 
 /**
- * Given an ID of an instance of this module,
- * this function will permanently delete the instance and any data that depends on it.
+ * Permanently delete a JazzQuiz instance and any data that depends on it.
  *
- * @param int $id Id of the module instance
- * @return boolean Success/Failure
+ * @param int $id Module instance ID
+ * @return bool Success/Failure
  **/
-function jazzquiz_delete_instance($id) {
+function jazzquiz_delete_instance(int $id): bool {
     global $DB, $CFG;
 
     require_once($CFG->dirroot . '/mod/jazzquiz/locallib.php');
     require_once($CFG->libdir . '/questionlib.php');
     require_once($CFG->dirroot . '/question/editlib.php');
 
-    try {
-        $jazzquiz = $DB->get_record('jazzquiz', ['id' => $id], '*', MUST_EXIST);
-        // Go through each session and then delete them (also deletes all attempts for them).
-        $sessions = $DB->get_records('jazzquiz_sessions', ['jazzquizid' => $jazzquiz->id]);
-        foreach ($sessions as $session) {
-            \mod_jazzquiz\jazzquiz_session::delete($session->id);
-        }
-        // Delete all questions for this quiz.
-        $DB->delete_records('jazzquiz_questions', ['jazzquizid' => $jazzquiz->id]);
-        // Finally delete the jazzquiz object.
-        $DB->delete_records('jazzquiz', ['id' => $jazzquiz->id]);
-    } catch (Exception $e) {
-        return false;
+    $jazzquiz = $DB->get_record('jazzquiz', ['id' => $id], '*', MUST_EXIST);
+    // Go through each session and then delete them (also deletes all attempts for them).
+    $sessions = $DB->get_records('jazzquiz_sessions', ['jazzquizid' => $jazzquiz->id]);
+    foreach ($sessions as $session) {
+        jazzquiz_session::delete($session->id);
     }
+    $DB->delete_records('jazzquiz_questions', ['jazzquizid' => $jazzquiz->id]);
+    $DB->delete_records('jazzquiz', ['id' => $jazzquiz->id]);
     return true;
 }
 
 /**
- * Function to be run periodically according to the moodle cron
- * This function searches for things that need to be done, such
- * as sending out mail, toggling flags etc ...
+ * Function to be run periodically according to the moodle cron.
  *
- * @uses $CFG
- * @return boolean
- **/
-function jazzquiz_cron() {
+ * @return bool
+ */
+function jazzquiz_cron(): bool {
     return true;
 }
 
@@ -110,10 +93,9 @@ function jazzquiz_cron() {
  * @param navigation_node $jazzquiznode
  * @return void
  */
-function jazzquiz_extend_settings_navigation($settings, $jazzquiznode) {
+function jazzquiz_extend_settings_navigation(settings_navigation $settings, navigation_node $jazzquiznode): void {
     global $PAGE, $CFG;
 
-    // Require {@link questionlib.php}
     // Included here as we only ever want to include this file if we really need to.
     require_once($CFG->libdir . '/questionlib.php');
 
@@ -121,18 +103,18 @@ function jazzquiz_extend_settings_navigation($settings, $jazzquiznode) {
 }
 
 /**
- * @param \stdClass|int $course
- * @param \stdClass $cm
- * @param \context $context
+ * Plugin file callback for JazzQuiz.
+ *
+ * @param stdClass|int $course
+ * @param stdClass $cm
+ * @param context $context
  * @param string $filearea
  * @param array $args
  * @param mixed $forcedownload
  * @param array $options
  * @return bool
- * @throws coding_exception
- * @throws dml_exception
  */
-function jazzquiz_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, $options = []) {
+function jazzquiz_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, $options = []): bool {
     global $DB;
     if ($context->contextlevel != CONTEXT_MODULE) {
         return false;
@@ -149,7 +131,7 @@ function jazzquiz_pluginfile($course, $cm, $context, $filearea, $args, $forcedow
     }
     $question = $DB->get_record('jazzquiz_question', [
         'id' => $questionid,
-        'quizid' => $cm->instance
+        'quizid' => $cm->instance,
     ]);
     if (!$question) {
         return false;
@@ -157,7 +139,8 @@ function jazzquiz_pluginfile($course, $cm, $context, $filearea, $args, $forcedow
     $fs = get_file_storage();
     $relative = implode('/', $args);
     $fullpath = "/$context->id/mod_jazzquiz/$filearea/$questionid/$relative";
-    if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
+    $file = $fs->get_file_by_hash(sha1($fullpath));
+    if (!$file || $file->is_directory()) {
         return false;
     }
     send_stored_file($file);
@@ -165,11 +148,10 @@ function jazzquiz_pluginfile($course, $cm, $context, $filearea, $args, $forcedow
 }
 
 /**
- * Called via pluginfile.php -> question_pluginfile to serve files belonging to
- * a question in a question_attempt when that attempt is a quiz attempt.
+ * Serve files belonging to a question in a question_attempt when that attempt is a quiz attempt.
+ *
+ * Called via pluginfile.php -> question_pluginfile.
  *
- * @package mod_jazzquiz
- * @category files
  * @param stdClass $course course settings object
  * @param stdClass $context context object
  * @param string $component the name of the component we are serving files for.
@@ -179,13 +161,16 @@ function jazzquiz_pluginfile($course, $cm, $context, $filearea, $args, $forcedow
  * @param array $args the remaining bits of the file path.
  * @param bool $forcedownload whether the user must be forced to download the file.
  * @param array $options additional options affecting the file serving
+ * @package mod_jazzquiz
+ * @category files
  */
 function mod_jazzquiz_question_pluginfile($course, $context, $component, $filearea, $qubaid, $slot,
-                                          $args, $forcedownload, $options = []) {
+                                          $args, $forcedownload, $options = []): void {
     $fs = get_file_storage();
     $relative = implode('/', $args);
     $full = "/$context->id/$component/$filearea/$relative";
-    if (!$file = $fs->get_file_by_hash(sha1($full)) or $file->is_directory()) {
+    $file = $fs->get_file_by_hash(sha1($full));
+    if (!$file || $file->is_directory()) {
         send_file_not_found();
     }
     send_stored_file($file, 0, 0, $forcedownload, $options);
@@ -193,17 +178,16 @@ function mod_jazzquiz_question_pluginfile($course, $context, $component, $filear
 
 /**
  * Check whether JazzQuiz supports a certain feature or not.
+ *
  * @param string $feature
  * @return bool
  */
-function jazzquiz_supports(string $feature) : bool {
-    switch ($feature) {
-        case FEATURE_MOD_INTRO:
-        case FEATURE_BACKUP_MOODLE2:
-        case FEATURE_SHOW_DESCRIPTION:
-        case FEATURE_USES_QUESTIONS:
-            return true;
-        default:
-            return false;
-    }
+function jazzquiz_supports(string $feature): bool {
+    return match ($feature) {
+        FEATURE_MOD_INTRO,
+        FEATURE_BACKUP_MOODLE2,
+        FEATURE_SHOW_DESCRIPTION,
+        FEATURE_USES_QUESTIONS => true,
+        default => false,
+    };
 }
diff --git a/locallib.php b/locallib.php
index 5913336..586f6bb 100755
--- a/locallib.php
+++ b/locallib.php
@@ -15,7 +15,7 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * Local lib
+ * Local lib.
  *
  * @package   mod_jazzquiz
  * @author    John Hoopes <moodle@madisoncreativeweb.com>
@@ -25,18 +25,16 @@
 
 use mod_jazzquiz\jazzquiz;
 
-defined('MOODLE_INTERNAL') || die();
-
 /**
+ * View tab.
+ *
  * @param jazzquiz $jazzquiz
  * @param int $id
  * @param array $row
  * @param string $capability
  * @param string $name
- * @throws coding_exception
- * @throws moodle_exception
  */
-function jazzquiz_view_tab(jazzquiz $jazzquiz, int $id, array &$row, string $capability, string $name) {
+function jazzquiz_view_tab(jazzquiz $jazzquiz, int $id, array &$row, string $capability, string $name): void {
     if (has_capability($capability, $jazzquiz->context)) {
         $url = new moodle_url("/mod/jazzquiz/$name.php", ['id' => $id]);
         $row[] = new tabobject($name, $url, get_string($name, 'jazzquiz'));
@@ -45,13 +43,12 @@ function jazzquiz_view_tab(jazzquiz $jazzquiz, int $id, array &$row, string $cap
 
 /**
  * Prints tabs for instructor.
+ *
  * @param jazzquiz $jazzquiz
  * @param string $tab
  * @return string HTML string of the tabs
- * @throws coding_exception
- * @throws moodle_exception
  */
-function jazzquiz_view_tabs(jazzquiz $jazzquiz, string $tab) : string {
+function jazzquiz_view_tabs(jazzquiz $jazzquiz, string $tab): string {
     $tabs = [];
     $row = [];
     $inactive = [];
diff --git a/mod_form.php b/mod_form.php
index 88d2f43..80e415f 100755
--- a/mod_form.php
+++ b/mod_form.php
@@ -15,7 +15,7 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * The main configuration form
+ * The main configuration form.
  *
  * @package   mod_jazzquiz
  * @author    John Hoopes <moodle@madisoncreativeweb.com>
@@ -28,9 +28,17 @@
 
 require_once($CFG->dirroot . '/course/moodleform_mod.php');
 
+/**
+ * Module settings form.
+ */
 class mod_jazzquiz_mod_form extends moodleform_mod {
 
-    public function definition() {
+    /**
+     * Create form definition.
+     *
+     * @return void
+     */
+    public function definition(): void {
         $mform =& $this->_form;
 
         // Adding the "general" field set, where all the common settings are showed.
diff --git a/reports.php b/reports.php
index 79e25a2..5f317ef 100755
--- a/reports.php
+++ b/reports.php
@@ -15,9 +15,7 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * The reports page
- *
- * This handles displaying results
+ * The reports page.
  *
  * @package   mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastsg@stud.ntnu.no>
@@ -28,6 +26,8 @@
 
 namespace mod_jazzquiz;
 
+use moodle_url;
+
 require_once("../../config.php");
 require_once($CFG->libdir . '/questionlib.php');
 require_once($CFG->dirroot . '/mod/jazzquiz/locallib.php');
@@ -38,20 +38,17 @@
 require_login();
 
 /**
+ * View session report.
+ *
  * @param jazzquiz $jazzquiz
- * @param \moodle_url $url
+ * @param moodle_url $url
  * @param int $sessionid
- * @throws \coding_exception
- * @throws \dml_exception
- * @throws \moodle_exception
  */
-function jazzquiz_view_session_report(jazzquiz $jazzquiz, \moodle_url $url, int $sessionid) {
+function jazzquiz_view_session_report(jazzquiz $jazzquiz, moodle_url $url, int $sessionid): void {
+    global $DB;
     if ($sessionid === 0) {
         // If no session id is specified, we try to load the first one.
-        global $DB;
-        $sessions = $DB->get_records('jazzquiz_sessions', [
-            'jazzquizid' => $jazzquiz->data->id
-        ]);
+        $sessions = $DB->get_records('jazzquiz_sessions', ['jazzquizid' => $jazzquiz->data->id]);
         if (count($sessions) === 0) {
             echo get_string('no_sessions_exist', 'jazzquiz');
             return;
@@ -66,10 +63,11 @@ function jazzquiz_view_session_report(jazzquiz $jazzquiz, \moodle_url $url, int
 }
 
 /**
+ * Export session report.
+ *
  * @param jazzquiz $jazzquiz
- * @throws \coding_exception
  */
-function jazzquiz_export_session_report(jazzquiz $jazzquiz) {
+function jazzquiz_export_session_report(jazzquiz $jazzquiz): void {
     $what = required_param('what', PARAM_ALPHANUM);
     $sessionid = required_param('sessionid', PARAM_INT);
     $session = new jazzquiz_session($jazzquiz, $sessionid);
@@ -96,7 +94,13 @@ function jazzquiz_export_session_report(jazzquiz $jazzquiz) {
     }
 }
 
-function jazzquiz_delete_session_report(int $sessionid) {
+/**
+ * Delete a session report.
+ *
+ * @param int $sessionid
+ * @return void
+ */
+function jazzquiz_delete_session_report(int $sessionid): void {
     if ($sessionid !== 0) {
         jazzquiz_session::delete($sessionid);
     }
@@ -105,7 +109,7 @@ function jazzquiz_delete_session_report(int $sessionid) {
 /**
  * Entry point for viewing reports.
  */
-function jazzquiz_reports() {
+function jazzquiz_reports(): void {
     global $PAGE;
     $cmid = optional_param('id', false, PARAM_INT);
     if (!$cmid) {
@@ -118,7 +122,7 @@ function jazzquiz_reports() {
     require_capability('mod/jazzquiz:seeresponses', $jazzquiz->context);
     $action = optional_param('action', '', PARAM_ALPHANUM);
 
-    $url = new \moodle_url('/mod/jazzquiz/reports.php');
+    $url = new moodle_url('/mod/jazzquiz/reports.php');
     $url->param('id', $cmid);
     $url->param('quizid', $jazzquiz->data->id);
     $url->param('action', $action);
@@ -136,7 +140,7 @@ function jazzquiz_reports() {
     if (!$isdownload) {
         $jazzquiz->renderer->header($jazzquiz, 'reports');
     }
-        $sessionid = optional_param('sessionid', 0, PARAM_INT);
+    $sessionid = optional_param('sessionid', 0, PARAM_INT);
     switch ($action) {
         case 'view':
             jazzquiz_view_session_report($jazzquiz, $url, $sessionid);
diff --git a/styles.css b/styles.css
index ce2d008..12c94bb 100755
--- a/styles.css
+++ b/styles.css
@@ -5,23 +5,6 @@
     padding: 20px;
 }
 
-.jazzquiz-box .row {
-    margin: 5px;
-}
-
-.jazzquiz-box .inline-block {
-    display: inline-block;
-}
-
-.jazzquiz-box .span6 {
-    vertical-align: top;
-    width: 49.5%;
-}
-
-.jazzquiz-box .row .span6 {
-    padding: 5px;
-}
-
 .jazzquiz-save-question {
     height: 30px;
 }
@@ -345,44 +328,24 @@
     margin-left: 16px;
 }
 
-.jazzquiz-box .questionlist .dragquestion {
-    width: 10%;
+.dragquestion {
     cursor: move;
 }
 
-.jazzquiz-box .questionlist .icon {
-    vertical-align: middle;
-    height: auto;
-}
-
-.jazzquiz-box .questionlist .name {
-    width: calc(100% - 256px);
-    vertical-align: middle;
-}
-
 .jazzquiz-box .questionlist .name p {
     margin: 0;
 }
 
-.jazzquiz-box .questionlist .controls {
-    width: 100%;
-    vertical-align: middle;
-}
-
 .jazzquiz-box .questionlist li {
-    min-height: 30px;
     margin: 4px;
     padding: 10px;
     border: 1px solid #ddd;
     background: #eee;
 }
 
-.jazzquiz-box .questionlist li div {
-    display: inline-block;
-}
-
-.jazzquiz-box .questionlist li:hover {
-    background: #ddd;
+.jazzquiz-box .questionlist .controls {
+    display: grid;
+    grid-template-columns: 32px 32px auto 32px 32px 32px 32px;
 }
 
 .jazzquiz-box .questionlist li a {
@@ -474,6 +437,6 @@
 
 .start-question-menu .MathJax_Display,
 .questionlist li .controls .name .MathJax_Display {
-    text-align: left ;
-    margin: 0 ;
+    text-align: left;
+    margin: 0;
 }
diff --git a/templates/continue_session.mustache b/templates/continue_session.mustache
index ff98e84..437f2e4 100755
--- a/templates/continue_session.mustache
+++ b/templates/continue_session.mustache
@@ -1,15 +1,32 @@
 {{!
-    @template continue_session
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template mod_jazzquiz/continue_session
+
+    Link to continue session.
 
     Example context (json):
     {
-        "str": "Continue session...",
-        "path": "https://example.com/"
+        "path": "/mod/jazzquiz/view.php?id=1&quizid=1&action=quizstart"
     }
 }}
 <div class="jazzquiz-box">
-    <p>{{# str }} instructor_sessions_going, jazzquiz {{/ str }}</p>
+    <p>{{#str}}instructor_sessions_going, jazzquiz{{/str}}</p>
     <p>
-        <a href="{{ path }}" class="btn btn-secondary">{{# str }} goto_session, jazzquiz {{/ str }}</a>
+        <a href="{{path}}" class="btn btn-secondary">{{#str}}goto_session, jazzquiz{{/str}}</a>
     </p>
-</div>
\ No newline at end of file
+</div>
diff --git a/templates/edit_question_list.mustache b/templates/edit_question_list.mustache
index 3c6768d..a76d1d9 100755
--- a/templates/edit_question_list.mustache
+++ b/templates/edit_question_list.mustache
@@ -1,48 +1,84 @@
 {{!
-    @template edit_question_list
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 }}
+{{!
+    @template mod_jazzquiz/edit_question_list
+
+    Edit the questions used for a quiz.
+
+    Example context (json):
+    {
+        "questions": [
+            {
+                "id": 713,
+                "name": "Example question",
+                "first": true,
+                "last": false,
+                "slot": 1,
+                "editurl": "/mod/jazzquiz/edit.php?questionid=713&action=editquestion",
+                "icon": ""
+            },
+            {
+                "id": 509,
+                "name": "Another question",
+                "first": false,
+                "last": true,
+                "slot": 2,
+                "editurl": "/mod/jazzquiz/edit.php?questionid=509&action=editquestion",
+                "icon": ""
+            }
+        ],
+        "qbank": ""
+    }
+}}
+<div class="generalbox boxaligncenter jazzquiz-box jazzquiz-response-container">
+    <h2>{{#str}}questions, jazzquiz{{/str}}</h2>
+    <ol class="questionlist">
+    {{#questions}}
+        <li data-question-id="{{id}}">
+            <div class="controls">
+                <div class="dragquestion">{{#pix}}i/dragdrop, core{{/pix}}</div>
+                <div class="icon">{{{icon}}}</div>
+                <div class="name">
+                    <span class="filter_mathjaxloader_equation">{{{name}}}</span>
+                </div>
+                {{#first}}{{#pix}}spacer, core{{/pix}}{{/first}}
+                {{^first}}
+                    <a class="edit-question-action" data-action="up" data-question-id="{{id}}">
+                        {{#pix}}t/up, core, {{#str}}question_move_up, jazzquiz, {{slot}}{{/str}}{{/pix}}
+                    </a>
+                {{/first}}
+                {{#last}}{{#pix}}spacer, core{{/pix}}{{/last}}
+                {{^last}}
+                    <a class="edit-question-action" data-action="down" data-question-id="{{id}}">
+                        {{#pix}}t/down, core, {{#str}}question_move_down, jazzquiz, {{slot}}{{/str}}{{/pix}}
+                    </a>
+                {{/last}}
+                <a href="{{{editurl}}}">{{#pix}} t/edit, core, {{#str}}edit_question, jazzquiz{{/str}}{{/pix}}</a>
+                <a class="edit-question-action" data-action="delete" data-question-id="{{id}}">
+                    {{#pix}}t/delete, core, {{#str}}delete_question, jazzquiz, {{slot}}{{/str}}{{/pix}}
+                </a>
+            </div>
+        </li>
+    {{/questions}}
+    </ol>
+</div>
+
+<hr>
+
 <div class="generalbox boxaligncenter jazzquiz-box jazzquiz-response-container">
-    <div id="questionrow" class="row">
-        <div class="inline-block span6">
-            <h2>{{# str }} questions, jazzquiz {{/ str }}</h2>
-            <ol class="questionlist">
-                {{# questions }}
-                    <li data-question-id="{{ id }}">
-                        <div class="controls">
-                            <div class="dragquestion">
-                                {{# pix }} i/dragdrop, core {{/ pix }}
-                            </div>
-                            <div class="icon">
-                                {{{ icon }}}
-                            </div>
-                            <div class="name">
-                                <span class="filter_mathjaxloader_equation">
-                                    {{{ name }}}
-                                </span>
-                            </div>
-                            {{# first }}{{# pix }} spacer, core {{/ pix }}{{/ first }}
-                            {{^ first }}
-                                <a class="edit-question-action" data-action="up" data-question-id="{{ id }}">
-                                    {{# pix }} t/up, core, {{# str }} question_move_up, jazzquiz, {{ slot }} {{/ str }} {{/ pix }}
-                                </a>
-                            {{/ first }}
-                            {{# last }}{{# pix }} spacer, core {{/ pix }}{{/ last }}
-                            {{^ last }}
-                                <a class="edit-question-action" data-action="down" data-question-id="{{ id }}">
-                                    {{# pix }} t/down, core, {{# str }} question_move_down, jazzquiz, {{ slot }} {{/ str }} {{/ pix }}
-                                </a>
-                            {{/ last }}
-                            <a href="{{{ editurl }}}">{{# pix }} t/edit, core, {{# str }} edit_question, jazzquiz {{/ str }} {{/ pix }}</a>
-                            <a class="edit-question-action" data-action="delete" data-question-id="{{ id }}">
-                                {{# pix }} t/delete, core, {{# str }} delete_question, jazzquiz, {{ slot }} {{/ str }} {{/ pix }}
-                            </a>
-                        </div>
-                    </li>
-                {{/ questions  }}
-            </ol>
-        </div>
-        <div class="inline-block span6">
-            {{{ qbank }}}
-        </div>
-    </div>
-</div>
\ No newline at end of file
+    {{{qbank}}}
+</div>
diff --git a/templates/guests_not_allowed.mustache b/templates/guests_not_allowed.mustache
index 0110232..de93c38 100644
--- a/templates/guests_not_allowed.mustache
+++ b/templates/guests_not_allowed.mustache
@@ -1,8 +1,30 @@
 {{!
-    @template guests_not_allowed
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template mod_jazzquiz/guests_not_allowed
+
+    Guests are not allowed to access this quiz.
+
+    Example context (json):
+    {
+    }
 }}
 <div class="jazzquiz-box">
-    <p>{{# str }} guest_login, jazzquiz {{/ str }}</p>
-    <p>{{# str }} no_guests, jazzquiz {{/ str }}</p>
-    <p>{{# str }} ask_teacher, jazzquiz {{/ str }}</p>
+    <p>{{#str}}guest_login, jazzquiz{{/str}}</p>
+    <p>{{#str}}no_guests, jazzquiz{{/str}}</p>
+    <p>{{#str}}ask_teacher, jazzquiz{{/str}}</p>
 </div>
diff --git a/templates/join_session.mustache b/templates/join_session.mustache
index 1d747c7..5023fd8 100755
--- a/templates/join_session.mustache
+++ b/templates/join_session.mustache
@@ -1,14 +1,36 @@
 {{!
-    @template join_session
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template mod_jazzquiz/join_session
+
+    Show button to enter an ongoing JazzQuiz session.
+
+    Example context (json):
+    {
+        "name": "Example questions",
+        "anonymity_info": "Guests are allowed",
+        "started": true,
+        "form": ""
+    }
 }}
 <div class="jazzquiz-box">
-    <p>{{# str }} join_quiz_instructions, jazzquiz {{/ str }}</p>
-    <p>
-        <b>{{# str }} session, jazzquiz {{/ str }}:</b> {{ name }}
-    </p>
-    <p>{{ anonymity_info }}</p>
-    {{# started }}
-    <p>{{# str }} attempt_started, jazzquiz {{/ str }}</p>
-    {{/ started }}
-    {{{ form }}}
-</div>
\ No newline at end of file
+    <p>{{#str}}join_quiz_instructions, jazzquiz{{/str}}</p>
+    <p><b>{{#str}}session, jazzquiz{{/str}}:</b> {{name}}</p>
+    <p>{{anonymity_info}}</p>
+    {{#started}}<p>{{#str}}attempt_started, jazzquiz{{/str}}</p>{{/started}}
+    {{{form}}}
+</div>
diff --git a/templates/no_session.mustache b/templates/no_session.mustache
index 3bb497f..da808c4 100755
--- a/templates/no_session.mustache
+++ b/templates/no_session.mustache
@@ -1,9 +1,32 @@
 {{!
-    @template no_session
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template mod_jazzquiz/no_session
+
+    There is no session ongoing. Display a button to refresh the page to check again.
+
+    Example context (json):
+    {
+        "reload": "/mod/jazzquiz/view.php?id=1"
+    }
 }}
 <div class="jazzquiz-box">
-    <p>{{# str }} quiz_not_running, jazzquiz {{/ str }}</p>
+    <p>{{#str}}quiz_not_running, jazzquiz{{/str}}</p>
     <p>
-        <a href="{{ reload }}" class="btn btn-secondary">{{# str }} reload {{/ str }}</a>
+        <a href="{{reload}}" class="btn btn-secondary">{{#str}}reload{{/str}}</a>
     </p>
-</div>
\ No newline at end of file
+</div>
diff --git a/templates/question.mustache b/templates/question.mustache
index 9a16d63..08f7c1a 100755
--- a/templates/question.mustache
+++ b/templates/question.mustache
@@ -1,16 +1,41 @@
 {{!
-    @template question
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 }}
-<div class="jazzquiz-box {{# instructor }}instructor{{/ instructor }}">
-    <form id="jazzquiz_question_form" action="" method="post" enctype="multipart/form-data" accept-charset="utf8" onsubmit="return false;">
-        <div class="jazzquiz-response-container">{{{ question }}}</div>
-        <input type="hidden" name="slot" value="{{ slot }}">
-        {{^ instructor }}
+{{!
+    @template mod_jazzquiz/question
+
+    Display attempt form for a question.
+
+    Example context (json):
+    {
+        "instructor": false,
+        "question": "",
+        "slot": 1
+    }
+}}
+<div class="jazzquiz-box {{#instructor}}instructor{{/instructor}}">
+    <form id="jazzquiz_question_form" action="?" method="post" enctype="multipart/form-data" accept-charset="utf-8" onsubmit="return false;">
+        <div class="jazzquiz-response-container">{{{question}}}</div>
+        <input type="hidden" name="slot" value="{{slot}}">
+        {{^instructor}}
         <div class="save_row">
             <div class="jazzquiz-save-question">
-                <button class="btn btn-primary">Submit</button>
+                <button class="btn btn-primary">{{#str}}core, submit{{/str}}</button>
             </div>
         </div>
-        {{/ instructor }}
+        {{/instructor}}
     </form>
-</div>
\ No newline at end of file
+</div>
diff --git a/templates/quiz.mustache b/templates/quiz.mustache
index 2ff9728..e1e4d84 100755
--- a/templates/quiz.mustache
+++ b/templates/quiz.mustache
@@ -1,25 +1,57 @@
 {{!
-    @template quiz
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template mod_jazzquiz/quiz
+
+    Main wrapper for a JazzQuiz session.
+
+    Example context (json):
+    {
+        "instructor": true,
+        "buttons": [
+            {
+                "id": "improvise",
+                "icon": "edit",
+                "text": "Improvise"
+            }
+        ]
+    }
 }}
 <div id="jazzquiz">
-    {{# instructor }}
+    {{#instructor}}
     <div id="jazzquiz_controls_box" class="jazzquiz-box">
         <div id="jazzquiz_controls">
             <div class="quiz-list-buttons quiz-control-buttons hidden">
-                {{# buttons }}<button id="jazzquiz_control_{{ id }}" class="btn">
-                    <i class="fa fa-{{ icon }}"></i> {{ text }}
-                </button>{{/ buttons }}
+                {{#buttons}}
+                <button id="jazzquiz_control_{{id}}" class="btn">
+                    <i class="fa fa-{{icon}}"></i> {{text}}
+                </button>
+                {{/buttons}}
                 <div style="clear:both;"></div>
             </div>
             <div id="jazzquiz_improvise_menu" class="start-question-menu"></div>
             <div id="jazzquiz_jump_menu" class="start-question-menu"></div>
             <div class="quiz-list-buttons">
                 <button id="jazzquiz_control_startquiz" class="btn">
-                    <i class="fa fa-start"></i> {{# str }} startquiz, jazzquiz {{/ str }}
+                    <i class="fa fa-start"></i> {{#str}}startquiz, jazzquiz{{/str}}
                 </button>
                 <h4 class="inline"></h4>
                 <button id="jazzquiz_control_exit" class="btn">
-                    <i class="fa fa-close"></i> {{# str }} exit, jazzquiz {{/ str }}
+                    <i class="fa fa-close"></i> {{#str}}exit, jazzquiz{{/str}}
                 </button>
             </div>
             <div id="jazzquiz_control_separator"></div>
@@ -37,18 +69,18 @@
         <div id="jazzquiz_question_timer" class="jazzquiz-box hidden"></div>
         <div id="jazzquiz_response_info_container" class="jazzquiz-box hidden"></div>
     </div>
-    {{/ instructor }}
-    {{^ instructor }}
+    {{/instructor}}
+    {{^instructor}}
     <div id="jazzquiz_question_timer" class="jazzquiz-box hidden"></div>
-    {{/ instructor }}
+    {{/instructor}}
     <div id="jazzquiz_info_container" class="jazzquiz-box hidden"></div>
     <div id="jazzquiz_question_box"></div>
-    {{# instructor }}
+    {{#instructor}}
     <div>
         <button id="jazzquiz_undo_merge" class="btn btn-primary hidden">
             <i class="fa fa-undo"></i>
         </button>
     </div>
     <div id="jazzquiz_responses_container" class="jazzquiz-response-container jazzquiz-box hidden"></div>
-    {{/ instructor }}
-</div>
\ No newline at end of file
+    {{/instructor}}
+</div>
diff --git a/templates/report.mustache b/templates/report.mustache
index 7b59063..2cbb5b0 100755
--- a/templates/report.mustache
+++ b/templates/report.mustache
@@ -1,73 +1,154 @@
 {{!
-    @template report
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template mod_jazzquiz/report
+
+    Reports for JazzQuiz sessions.
+
+    Example context (json):
+    {
+        "select_session": {
+            "method": "get",
+            "action": "/mod/jazzquiz/reports.php",
+            "formid": "jazzquiz_select_session_form",
+            "id": "jazzquiz_select_session",
+            "name": "sessionid",
+            "options": [
+                {
+                    "name": "First session",
+                    "value": 1,
+                    "selected": true,
+                    "optgroup": false
+                }
+            ],
+            "params": [
+                {
+                    "name": "id",
+                    "value": 1
+                },
+                {
+                    "name": "action",
+                    "value": "view"
+                }
+            ]
+        },
+        "session": {
+            "slots": [
+                {
+                    "num": 1,
+                    "name": "Example question",
+                    "type": "multichoice",
+                    "description": "Description for this question",
+                    "responses": [
+                        {
+                            "response": "42"
+                        },
+                        {
+                            "response": "I don't know"
+                        }
+                    ]
+                }
+            ],
+            "students": [
+                {
+                    "idnumber": 1,
+                    "name": "Student",
+                    "count": 1
+                },
+                {
+                    "name": "Guest",
+                    "count": 1
+                }
+            ],
+            "count_total": 2,
+            "count_answered": 2,
+            "cmid": 1,
+            "quizid": 1,
+            "id": 1
+        }
+    }
 }}
 <div class="jazzquiz-box">
-    {{# select_session }}
+    {{#select_session}}
     <div>
-        <h3>{{# str }} select_session, jazzquiz {{/ str }}</h3>
+        <h3>{{#str}}select_session, jazzquiz{{/str}}</h3>
         <br>
         <div class="inline-block">
-            {{> core/single_select }}
+            {{>core/single_select}}
         </div>
     </div>
-    {{/ select_session }}
-    {{# session }}
+    {{/select_session}}
+    {{#session}}
         <div id="report_overview_controls" class="jazzquiz-box">
             <button data-action="attendance" class="btn btn-primary">
-                {{# str }} attendance, jazzquiz {{/str}}
+                {{#str}}attendance, jazzquiz{{/str}}
             </button>
             <button data-action="responses" class="btn btn-primary">
-                {{# str }} responses, jazzquiz {{/str}}
+                {{#str}}responses, jazzquiz{{/str}}
             </button>
-            <a href="reports.php?id={{ cmid }}&quizid={{ quizid }}&sessionid={{ id }}&action=export&what=report&download=yes">
-                {{# str }} download_report, jazzquiz {{/str}}
+            <a href="reports.php?id={{cmid}}&quizid={{quizid}}&sessionid={{id}}&action=export&what=report&download=yes">
+                {{#str}}download_report, jazzquiz{{/str}}
             </a>
-            <a href="reports.php?id={{ cmid }}&quizid={{ quizid }}&sessionid={{ id }}&action=delete">
-                {{# str }} delete_report, jazzquiz {{/str}}
+            <a href="reports.php?id={{cmid}}&quizid={{quizid}}&sessionid={{id}}&action=delete">
+                {{#str}}delete_report, jazzquiz{{/str}}
             </a>
         </div>
         <div id="report_overview_responses" class="jazzquiz-response-container hidden">
-            {{# slots }}
+            {{#slots}}
                 <div class="jazzquiz-box">
                     <h2>
                         <span class="filter_mathjaxloader_equation">
-                                {{{ name }}}
+                                {{{name}}}
                         </span>
                     </h2>
                     <span class="filter_mathjaxloader_equation">
-                        {{{ description }}}
+                        {{{description}}}
                     </span>
-                    <table id="responses_wrapper_table_{{ num }}" class="jazzquiz-responses-overview"></table>
+                    <table id="responses_wrapper_table_{{num}}" class="jazzquiz-responses-overview"></table>
                     <br>
-                    <a href="reports.php?id={{ cmid }}&quizid={{ quizid }}&sessionid={{ id }}&slot={{ num }}&action=export&what=question&download=yes">
-                        {{# str }} download_responses, jazzquiz {{/ str }}
+                    <a href="reports.php?id={{cmid}}&quizid={{quizid}}&sessionid={{id}}&slot={{num}}&action=export&what=question&download=yes">
+                        {{#str}}download_responses, jazzquiz{{/str}}
                     </a>
                 </div>
-            {{/ slots }}
+            {{/slots}}
         </div>
         <div id="report_overview_responded" class="jazzquiz-box">
-            <h2>{{# str }} attendance_list, jazzquiz {{/str}}</h2>
+            <h2>{{#str}}attendance_list, jazzquiz{{/str}}</h2>
             <table>
                 <tr>
-                    <th>Student ID</th> 
-                    <th>{{# str }} student, jazzquiz {{/str}}</th>
-                    <th>{{# str }} responses, jazzquiz {{/ str }}</th>
+                    <th>Student ID</th>
+                    <th>{{#str}}student, jazzquiz{{/str}}</th>
+                    <th>{{#str}}responses, jazzquiz{{/str}}</th>
                 </tr>
-                {{# students }}
+                {{#students}}
                     <tr>
-                        <td>{{ idnumber }}</td>
-                        <td>{{ name }}</td>
-                        <td>{{# str }} a_responses, jazzquiz, {{ count }} {{/ str }}</td>
+                        <td>{{idnumber}}</td>
+                        <td>{{name}}</td>
+                        <td>{{#str}}a_responses, jazzquiz, {{count}}{{/str}}</td>
                     </tr>
-                {{/ students }}
+                {{/students}}
             </table>
             <br>
-            <p>{{# str }} a_students_joined_quiz, jazzquiz, {{ count_total }} {{/ str }}</p>
-            <p>{{# str }} a_students_answered, jazzquiz, {{ count_answered }} {{/ str }}</p>
+            <p>{{#str}}a_students_joined_quiz, jazzquiz, {{count_total}}{{/str}}</p>
+            <p>{{#str}}a_students_answered, jazzquiz, {{count_answered}}{{/str}}</p>
             <br>
-            <a href="reports.php?id={{ cmid }}&quizid={{ quizid }}&sessionid={{ id }}&action=export&what=attendance&download=yes">
-                {{# str }} download_attendance_list, jazzquiz {{/ str }}
+            <a href="reports.php?id={{cmid}}&quizid={{quizid}}&sessionid={{id}}&action=export&what=attendance&download=yes">
+                {{#str}}download_attendance_list, jazzquiz{{/str}}
             </a>
         </div>
-    {{/ session }}
+    {{/session}}
 </div>
diff --git a/templates/start_session.mustache b/templates/start_session.mustache
index 2f03678..2a992f2 100755
--- a/templates/start_session.mustache
+++ b/templates/start_session.mustache
@@ -1,8 +1,31 @@
 {{!
-    @template start_session
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template mod_jazzquiz/start_session
+
+    Show form to start a new session.
+
+    Example context (json):
+    {
+        "form": ""
+    }
 }}
 <div class="jazzquiz-box">
-    <p>{{# str }} teacher_start_instructions, jazzquiz {{/ str }}</p>
+    <p>{{#str}}teacher_start_instructions, jazzquiz{{/str}}</p>
     <br>
-    {{{ form }}}
-</div>
\ No newline at end of file
+    {{{form}}}
+</div>
diff --git a/version.php b/version.php
index 28e96bb..60588eb 100755
--- a/version.php
+++ b/version.php
@@ -15,6 +15,8 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
+ * JazzQuiz version information.
+ *
  * @package   mod_jazzquiz
  * @author    Sebastian S. Gundersen <sebastian@sgundersen.com>
  * @author    André Storhaug <andr3.storhaug@gmail.com>
diff --git a/view.php b/view.php
index a14822b..6f39778 100755
--- a/view.php
+++ b/view.php
@@ -25,7 +25,9 @@
  */
 
 namespace mod_jazzquiz;
-use Exception;
+
+use moodle_url;
+use required_capability_exception;
 
 require_once("../../config.php");
 require_once($CFG->dirroot . '/mod/jazzquiz/lib.php');
@@ -37,11 +39,10 @@
 
 /**
  * View the quiz page.
+ *
  * @param jazzquiz $jazzquiz
- * @throws \dml_exception
- * @throws \moodle_exception
  */
-function jazzquiz_view_start_quiz(jazzquiz $jazzquiz) {
+function jazzquiz_view_start_quiz(jazzquiz $jazzquiz): void {
     global $PAGE;
     // Set the quiz view page to the base layout for 1 column layout.
     $PAGE->set_pagelayout('base');
@@ -55,11 +56,11 @@ function jazzquiz_view_start_quiz(jazzquiz $jazzquiz) {
     $session->load_attempts();
     $session->initialize_attempt();
     if ($jazzquiz->is_instructor()) {
-        $session->attempt->data->status = jazzquiz_attempt::PREVIEW;
+        $session->myattempt->status = jazzquiz_attempt::PREVIEW;
     } else {
-        $session->attempt->data->status = jazzquiz_attempt::INPROGRESS;
+        $session->myattempt->status = jazzquiz_attempt::INPROGRESS;
     }
-    $session->attempt->save();
+    $session->myattempt->save();
 
     // Initialize JavaScript for the question engine.
     // TODO: Not certain if this is needed. Should be checked further.
@@ -73,35 +74,23 @@ function jazzquiz_view_start_quiz(jazzquiz $jazzquiz) {
 
 /**
  * View the "Continue session" or "Start session" form.
+ *
  * @param jazzquiz $jazzquiz
- * @throws \dml_exception
- * @throws \moodle_exception
  */
-function jazzquiz_view_default_instructor(jazzquiz $jazzquiz) {
-    global $PAGE, $DB;
+function jazzquiz_view_default_instructor(jazzquiz $jazzquiz): void {
+    global $PAGE;
     $startsessionform = new forms\view\start_session($PAGE->url, ['jazzquiz' => $jazzquiz]);
     $data = $startsessionform->get_data();
     if ($data) {
-        $sessions = $DB->get_records('jazzquiz_sessions', [
-            'jazzquizid' => $jazzquiz->data->id,
-            'sessionopen' => 1
-        ]);
-        // Only create session if not already open.
-        if (empty($sessions)) {
-            $allowguests = isset($data->allowguests) ? 1 : 0;
-            $sessionid = $jazzquiz->create_session($data->session_name, $data->anonymity, $allowguests);
-            if ($sessionid === false) {
-                return;
-            }
-        } else {
+        if ($jazzquiz->is_session_open()) {
             redirect($PAGE->url, 'A session is already open.', 0);
-            // Note: Redirect exits.
+        } else {
+            $jazzquiz->create_session($data->session_name, $data->anonymity, isset($data->allowguests));
         }
         // Redirect to the quiz start.
         $quizstarturl = clone($PAGE->url);
         $quizstarturl->param('action', 'quizstart');
         redirect($quizstarturl, null, 0);
-        // Note: Redirect exits.
     }
     $renderer = $jazzquiz->renderer;
     $renderer->header($jazzquiz, 'view');
@@ -115,10 +104,10 @@ function jazzquiz_view_default_instructor(jazzquiz $jazzquiz) {
 
 /**
  * View the "Join quiz" or "Quiz not running" form.
+ *
  * @param jazzquiz $jazzquiz
- * @throws \moodle_exception
  */
-function jazzquiz_view_default_student(jazzquiz $jazzquiz) {
+function jazzquiz_view_default_student(jazzquiz $jazzquiz): void {
     global $PAGE;
     $studentstartform = new forms\view\student_start_form($PAGE->url);
     $data = $studentstartform->get_data();
@@ -126,7 +115,6 @@ function jazzquiz_view_default_student(jazzquiz $jazzquiz) {
         $quizstarturl = clone($PAGE->url);
         $quizstarturl->param('action', 'quizstart');
         redirect($quizstarturl, null, 0);
-        // Note: Redirect exits.
     }
 
     /** @var output\renderer $renderer */
@@ -143,11 +131,10 @@ function jazzquiz_view_default_student(jazzquiz $jazzquiz) {
 
 /**
  * View appropriate form based on role and session state.
+ *
  * @param jazzquiz $jazzquiz
- * @throws \dml_exception
- * @throws \moodle_exception
  */
-function jazzquiz_view_default(jazzquiz $jazzquiz) {
+function jazzquiz_view_default(jazzquiz $jazzquiz): void {
     if ($jazzquiz->is_instructor()) {
         // Show "Start quiz" form.
         jazzquiz_view_default_instructor($jazzquiz);
@@ -157,18 +144,14 @@ function jazzquiz_view_default(jazzquiz $jazzquiz) {
     }
 }
 
-
 /**
  * Entry point for viewing a quiz.
  */
-function jazzquiz_view() {
+function jazzquiz_view(): void {
     global $PAGE;
-    $cmid = optional_param('id', false, PARAM_INT);
-    if (!$cmid) {
-        // Probably a login redirect that doesn't include any ID.
-        // Go back to the main Moodle page, because we have no info.
-        header('Location: /');
-        exit;
+    $cmid = optional_param('id', 0, PARAM_INT);
+    if ($cmid === 0) {
+        redirect(new moodle_url('/'));
     }
 
     $action = optional_param('action', '', PARAM_ALPHANUM);
@@ -177,14 +160,12 @@ function jazzquiz_view() {
     $iscapable = true;
 
     /*
-     * Checks that the user is authorised for he quiz.
-     * access or not.
+     * Checks that the user is authorised for the quiz access or not.
      * The require_capability() method checks this for students
      * and teacher, but it cannot handle the case where guest
-     * access is allowed.  Hence, if guests are allowed, no
-     * further check is made.
+     * access is allowed.  Hence, if guests are allowed, no further check is made.
      */
-    if (!$session || $session->data->allowguests != 1) {
+    if ($session === null || $session->data->allowguests != 1) {
         try {
             /*
              * require_capability() throws an exception if the user does not
@@ -192,7 +173,7 @@ function jazzquiz_view() {
              * or teacher is not enrolled on the course.
              */
             require_capability('mod/jazzquiz:attempt', $jazzquiz->context);
-        } catch (Exception $e) {
+        } catch (required_capability_exception) {
             // Indicates that the guest user is not allowed to access this session.
             $iscapable = false;
         }
@@ -202,10 +183,10 @@ function jazzquiz_view() {
     $PAGE->set_context($jazzquiz->context);
     $PAGE->set_cm($jazzquiz->cm);
     $modname = get_string('modulename', 'jazzquiz');
-    $quizname = format_string($jazzquiz->data->name, true);
+    $quizname = format_string($jazzquiz->data->name);
     $PAGE->set_title(strip_tags($jazzquiz->course->shortname . ': ' . $modname . ': ' . $quizname));
     $PAGE->set_heading($jazzquiz->course->fullname);
-    $url = new \moodle_url('/mod/jazzquiz/view.php');
+    $url = new moodle_url('/mod/jazzquiz/view.php');
     $url->param('id', $cmid);
     $url->param('quizid', $jazzquiz->data->id);
     $url->param('action', $action);