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locallib.php
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<?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/>.
/**
* Internal library of functions for module ratingallocate
*
* All the ratingallocate specific functions, needed to implement the module
* logic, should go here. Never include this file from your lib.php!
*
* @package mod_ratingallocate
* @copyright 2014 M Schulze
* @copyright based on code by Stefan Koegel copyright (C) 2013 Stefan Koegel
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
use ratingallocate\db as this_db;
global $CFG;
require_once(dirname(__FILE__) . '/lib.php');
require_once(dirname(__FILE__) . '/form_manual_allocation.php');
require_once(dirname(__FILE__) . '/form_modify_choice.php');
require_once(dirname(__FILE__) . '/renderable.php');
require_once($CFG->dirroot.'/group/lib.php');
require_once($CFG->dirroot . '/repository/lib.php');
require_once(__DIR__.'/classes/algorithm_status.php');
// Takes care of loading all the solvers.
require_once(dirname(__FILE__) . '/solver/ford-fulkerson-koegel.php');
require_once(dirname(__FILE__) . '/solver/edmonds-karp.php');
// Now come all the strategies.
require_once(dirname(__FILE__) . '/strategy/strategy01_yes_no.php');
require_once(dirname(__FILE__) . '/strategy/strategy02_yes_maybe_no.php');
require_once(dirname(__FILE__) . '/strategy/strategy03_lickert.php');
require_once(dirname(__FILE__) . '/strategy/strategy04_points.php');
require_once(dirname(__FILE__) . '/strategy/strategy05_order.php');
require_once(dirname(__FILE__) . '/strategy/strategy06_tickyes.php');
/**
* Simulate a static/singleton class that holds all the strategies that registered with him
*/
class strategymanager {
/** @var array of string-identifier of all registered strategies */
private static $strategies = array();
/**
* Add a strategy to the strategymanager
* @param string $strategyname
*/
public static function add_strategy($strategyname) {
self::$strategies[] = $strategyname;
}
/**
* Get the current list of strategies
* @return array
*/
public static function get_strategies() {
return self::$strategies;
}
}
define('ACTION_GIVE_RATING', 'give_rating');
define('ACTION_DELETE_RATING', 'delete_rating');
define('ACTION_SHOW_CHOICES', 'show_choices');
define('ACTION_EDIT_CHOICE', 'edit_choice');
define('ACTION_ENABLE_CHOICE', 'enable_choice');
define('ACTION_DISABLE_CHOICE', 'disable_choice');
define('ACTION_DELETE_CHOICE', 'delete_choice');
define('ACTION_START_DISTRIBUTION', 'start_distribution');
define('ACTION_MANUAL_ALLOCATION', 'manual_allocation');
define('ACTION_PUBLISH_ALLOCATIONS', 'publish_allocations'); // Make them displayable for the users.
define('ACTION_SOLVE_LP_SOLVE', 'solve_lp_solve'); // Instead of only generating the mps-file, let it solve.
define('ACTION_SHOW_RATINGS_AND_ALLOCATION_TABLE', 'show_ratings_and_allocation_table');
define('ACTION_SHOW_ALLOCATION_TABLE', 'show_allocation_table');
define('ACTION_SHOW_STATISTICS', 'show_statistics');
define('ACTION_ALLOCATION_TO_GROUPING', 'allocation_to_gropuping');
/**
* Wrapper for db-record to have IDE autocomplete feature of fields
* @property int $id
* @property int $course
* @property string $name
* @property string $intro
* @property string $strategy
* @property int $accesstimestart
* @property int $accesstimestop
* @property int $publishdate
* @property int $published
* @property int $notificationsend
* @property int $runalgorithmbycron
* @property int $algorithmstarttime
* @property int $algorithmstatus
* -1 failure while running algorithm;
* 0 algorithm has not been running;
* 1 algorithm running;
* 2 algorithm finished;
* @property string $setting
*/
class ratingallocate_db_wrapper {
/** @var stdClass */
public $dbrecord;
/** Emulates the functionality as if there were explicit records by passing them to the original db record
*
* @param string $name
* @return mixed
*/
public function __get($name) {
return $this->dbrecord->{$name};
}
public function __construct($record) {
$this->dbrecord = $record;
}
}
/**
* Kapselt eine Instanz von ratingallocate
*
* @author max
*
*/
class ratingallocate {
/** @var int */
private $ratingallocateid;
/** @var ratingallocate_db_wrapper */
public $ratingallocate;
/** @var stdClass original db_record of this instance */
private $origdbrecord;
/** @var stdClass */
private $course;
/** @var stdClass */
private $coursemodule;
/** @var context_module */
private $context;
/** @var $db moodle_database */
public $db; // Public because solvers need it, too.
/**
* @var mod_ratingallocate_renderer the custom renderer for this module
*/
protected $renderer;
const NOTIFY_SUCCESS = 'notifysuccess';
const NOTIFY_MESSAGE = 'notifymessage';
/**
* Returns all users enrolled in the course the ratingallocate is in
*/
public function get_raters_in_course() {
$raters = get_enrolled_users($this->context, 'mod/ratingallocate:give_rating');
return $raters;
}
public function __construct($ratingallocaterecord, $course, $coursem, context_module $context) {
global $DB;
$this->db = & $DB;
$this->origdbrecord = $ratingallocaterecord;
$this->ratingallocate = new ratingallocate_db_wrapper($ratingallocaterecord);
$this->ratingallocateid = $this->ratingallocate->id;
$this->course = $course;
$this->coursemodule = $coursem;
$this->context = $context;
}
/**
* @return string
* @throws coding_exception
*/
private function process_action_start_distribution() {
global $DB, $PAGE;
// Process form: Start distribution and call default page after finishing.
if (has_capability('mod/ratingallocate:start_distribution', $this->context)) {
if ($this->get_algorithm_status() === \mod_ratingallocate\algorithm_status::running) {
// Don't run, if an instance is already running.
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)),
get_string('algorithm_already_running', ratingallocate_MOD_NAME),
null,
\core\output\notification::NOTIFY_INFO);
} else if ($this->ratingallocate->runalgorithmbycron === "1" &&
$this->get_algorithm_status() === \mod_ratingallocate\algorithm_status::notstarted
) {
// Don't run, if the cron has not started yet, but is set as priority.
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)),
get_string('algorithm_scheduled_for_cron', ratingallocate_MOD_NAME),
null,
\core\output\notification::NOTIFY_INFO);
} else {
$this->origdbrecord->{this_db\ratingallocate::ALGORITHMSTATUS} = \mod_ratingallocate\algorithm_status::running;
$DB->update_record(this_db\ratingallocate::TABLE, $this->origdbrecord);
// Try to get some more memory, 500 users in 10 groups take about 15mb.
raise_memory_limit(MEMORY_EXTRA);
core_php_time_limit::raise();
// Distribute choices.
$timeneeded = $this->distrubute_choices();
// Logging.
$event = \mod_ratingallocate\event\distribution_triggered::create_simple(
context_module::instance($this->coursemodule->id), $this->ratingallocateid, $timeneeded);
$event->trigger();
redirect(new moodle_url($PAGE->url->out()),
get_string('distribution_saved', ratingallocate_MOD_NAME, $timeneeded),
null,
\core\output\notification::NOTIFY_SUCCESS);
}
}
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)));
return;
}
private function process_action_give_rating() {
global $CFG;
$output = '';
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
// Print data and controls for students, but not for admins.
if (has_capability('mod/ratingallocate:give_rating', $this->context, null, false)) {
global $DB, $PAGE, $USER;
$status = $this->get_status();
// If no choice option exists WARN!
if (!$DB->record_exists('ratingallocate_choices', array('ratingallocateid' => $this->ratingallocateid))) {
$renderer->add_notification(get_string('no_choice_to_rate', ratingallocate_MOD_NAME));
} else if ($status === self::DISTRIBUTION_STATUS_RATING_IN_PROGRESS) {
// Rating is possible...
// Suche das richtige Formular nach Strategie.
$strategyform = 'ratingallocate\\' . $this->ratingallocate->strategy . '\\mod_ratingallocate_view_form';
/* @var $mform moodleform */
$mform = new $strategyform($PAGE->url->out(), $this);
$mform->add_action_buttons();
if ( $mform->is_cancelled() ) {
// Return to view.
redirect("$CFG->wwwroot/mod/ratingallocate/view.php?id=".$this->coursemodule->id);
return "";
} else if ($mform->is_submitted() && $mform->is_validated() && $data = $mform->get_data() ) {
// Save submitted data and call default page.
$this->save_ratings_to_db($USER->id, $data->data);
$renderer->add_notification(get_string('ratings_saved', ratingallocate_MOD_NAME), self::NOTIFY_SUCCESS);
return $this->process_default();
}
$mform->definition_after_data();
$output .= $renderer->render_ratingallocate_strategyform($mform);
// Logging.
$event = \mod_ratingallocate\event\rating_viewed::create_simple(
context_module::instance($this->coursemodule->id), $this->ratingallocateid);
$event->trigger();
}
}
return $output;
}
/**
* Processes the action of a user deleting his rating.
*/
private function process_action_delete_rating() {
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
// Print data and controls for students, but not for admins.
if (has_capability('mod/ratingallocate:give_rating', $this->context, null, false)) {
global $USER;
$status = $this->get_status();
if ($status === self::DISTRIBUTION_STATUS_RATING_IN_PROGRESS) {
// Rating is possible...
$this->delete_ratings_of_user($USER->id);
$renderer->add_notification(get_string('ratings_deleted', ratingallocate_MOD_NAME), self::NOTIFY_SUCCESS);
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)),
get_string('ratings_deleted', ratingallocate_MOD_NAME),
null,
\core\output\notification::NOTIFY_SUCCESS);
}
}
redirect(new moodle_url('/mod/ratingallocate/view.php', array('id' => $this->coursemodule->id)));
}
private function process_action_show_choices() {
if (has_capability('mod/ratingallocate:modify_choices', $this->context)) {
global $OUTPUT;
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
// Notifications if no choices exist or too few in comparison to strategy settings.
$availablechoices = $this->get_rateable_choices();
$strategysettings = $this->get_strategy_class()->get_static_settingfields();
if (array_key_exists(ratingallocate\strategy_order\strategy::COUNTOPTIONS, $strategysettings)) {
$necessarychoices =
$strategysettings[ratingallocate\strategy_order\strategy::COUNTOPTIONS][2];
} else {
$necessarychoices = 0;
}
if (count($availablechoices) < $necessarychoices) {
$renderer->add_notification(get_string('too_few_choices_to_rate', ratingallocate_MOD_NAME, $necessarychoices));
}
echo $renderer->render_header($this->ratingallocate, $this->context, $this->coursemodule->id);
echo $OUTPUT->heading(get_string('show_choices_header', ratingallocate_MOD_NAME));
$renderer->ratingallocate_show_choices_table($this, true);
echo $OUTPUT->single_button(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)), get_string('back'), 'get');
echo $renderer->render_footer();
}
}
private function process_action_edit_choice() {
global $DB, $PAGE;
$output = '';
if (has_capability('mod/ratingallocate:modify_choices', $this->context)) {
global $OUTPUT;
$choiceid = optional_param('choiceid', 0, PARAM_INT);
if ($choiceid) {
$record = $DB->get_record(this_db\ratingallocate_choices::TABLE, array('id' => $choiceid));
$choice = new ratingallocate_choice($record);
} else {
$choice = null;
}
$data = new stdClass();
$options = array('subdirs' => false, 'maxfiles' => -1, 'accepted_types' => '*', 'return_types' => FILE_INTERNAL);
file_prepare_standard_filemanager($data, 'attachments', $options, $this->context,
'mod_ratingallocate', 'choice_attachment', $choiceid);
$mform = new modify_choice_form(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id,
'ratingallocateid' => $this->ratingallocateid,
'action' => ACTION_EDIT_CHOICE,
)),
$this, $choice, array('attachment_data' => $data));
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
if ($mform->is_submitted() && $data = $mform->get_submitted_data()) {
if (!$mform->is_cancelled()) {
if ($mform->is_validated()) {
// Processing for editor element (FORMAT_HTML is assumed).
// Note: No file management implemented at this point.
if (is_array($data->explanation)) {
$data->explanation = $data->explanation['text'];
}
$this->save_modify_choice_form($data);
$data = file_postupdate_standard_filemanager($data, 'attachments', $options, $this->context,
'mod_ratingallocate', 'choice_attachment', $data->choiceid);
$renderer->add_notification(get_string("choice_added_notification", ratingallocate_MOD_NAME),
self::NOTIFY_SUCCESS);
} else {
$output .= $OUTPUT->heading(get_string('edit_choice', ratingallocate_MOD_NAME), 2);
$output .= $mform->to_html();
return $output;
}
}
if (object_property_exists($data, 'submitbutton2')) {
// If form was submitted using submit2, redirect to the empty edit choice form.
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id,
'ratingallocateid' => $this->ratingallocateid,
'action' => ACTION_EDIT_CHOICE, 'next' => true)));
} else {
// If form was submitted using save or cancel, redirect to the choices table.
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id, 'action' => ACTION_SHOW_CHOICES)));
}
} else {
$isnext = optional_param('next', false, PARAM_BOOL);
if ($isnext) {
$renderer->add_notification(get_string("choice_added_notification", ratingallocate_MOD_NAME),
self::NOTIFY_SUCCESS);
}
$output .= $OUTPUT->heading(get_string('edit_choice', ratingallocate_MOD_NAME), 2);
$output .= $mform->to_html();
}
}
return $output;
}
/**
* Enables or disables a choice and displays the choices list.
* @param bool $active states if the choice should be set active or inavtive
*/
private function process_action_enable_choice($active) {
if (has_capability('mod/ratingallocate:modify_choices', $this->context)) {
global $DB;
$choiceid = optional_param('choiceid', 0, PARAM_INT);
if ($choiceid) {
$DB->set_field(this_db\ratingallocate_choices::TABLE,
this_db\ratingallocate_choices::ACTIVE,
$active,
array('id' => $choiceid));
}
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id, 'action' => ACTION_SHOW_CHOICES)));
}
}
/**
* Deletes a choice and displays the choices list.
*/
private function process_action_delete_choice() {
if (has_capability('mod/ratingallocate:modify_choices', $this->context)) {
global $DB;
$choiceid = optional_param('choiceid', 0, PARAM_INT);
if ($choiceid) {
$choice = $DB->get_record(this_db\ratingallocate_choices::TABLE, array('id' => $choiceid));
if ($choice) {
$DB->delete_records(this_db\ratingallocate_choices::TABLE, array('id' => $choiceid));
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id, 'action' => ACTION_SHOW_CHOICES)),
get_string('choice_deleted_notification', ratingallocate_MOD_NAME,
$choice->{this_db\ratingallocate_choices::TITLE}),
null,
\core\output\notification::NOTIFY_SUCCESS);
} else {
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id, 'action' => ACTION_SHOW_CHOICES)),
get_string('choice_deleted_notification_error', ratingallocate_MOD_NAME),
null,
\core\output\notification::NOTIFY_ERROR);
}
}
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id, 'action' => ACTION_SHOW_CHOICES)));
}
}
private function process_action_manual_allocation() {
// Manual allocation.
$output = '';
if (has_capability('mod/ratingallocate:start_distribution', $this->context)) {
global $OUTPUT, $PAGE;
$mform = new manual_alloc_form($PAGE->url, $this);
$notification = '';
$notificationtype = null;
if (!$mform->no_submit_button_pressed() && $data = $mform->get_submitted_data()) {
if (!$mform->is_cancelled() ) {
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
$status = $this->get_status();
if ($status === self::DISTRIBUTION_STATUS_TOO_EARLY ||
$status === self::DISTRIBUTION_STATUS_RATING_IN_PROGRESS) {
$notification = get_string('modify_allocation_group_desc_'.$status, ratingallocate_MOD_NAME);
$notificationtype = \core\output\notification::NOTIFY_WARNING;
} else {
$allocationdata = optional_param_array('allocdata', array(), PARAM_INT);
if ($userdata = optional_param_array('userdata', null, PARAM_INT)) {
$this->save_manual_allocation_form($allocationdata, $userdata);
$notification = get_string('manual_allocation_saved', ratingallocate_MOD_NAME);
$notificationtype = \core\output\notification::NOTIFY_SUCCESS;
} else {
$notification = get_string('manual_allocation_nothing_to_be_saved', ratingallocate_MOD_NAME);
$notificationtype = \core\output\notification::NOTIFY_INFO;
}
}
} else {
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)));
}
// If form was submitted using save or cancel, retirect to the default page.
if (property_exists($data, "submitbutton")){
if ($notification) {
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)), $notification, null, $notificationtype);
} else {
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)));
}
// If the save and continue button was pressed,
// redirect to the manual allocation form to refresh the checked radiobuttons.
} else if (property_exists($data, "submitbutton2")){
if ($notification) {
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id, 'action' => ACTION_MANUAL_ALLOCATION)), $notification, null, $notificationtype);
} else {
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id, 'action' => ACTION_MANUAL_ALLOCATION)));
}
}
}
$output .= $OUTPUT->heading(get_string('manual_allocation', ratingallocate_MOD_NAME), 2);
$output .= $mform->to_html();
$this->showinfo = false;
}
return $output;
}
private function process_action_show_ratings_and_alloc_table() {
$output = '';
// Print ratings table.
if (has_capability('mod/ratingallocate:start_distribution', $this->context)) {
global $OUTPUT;
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
$output .= $renderer->ratings_table_for_ratingallocate($this->get_rateable_choices(),
$this->get_ratings_for_rateable_choices(), $this->get_raters_in_course(),
$this->get_allocations(), $this);
$output .= html_writer::empty_tag('br', array());
$output .= $OUTPUT->single_button(new moodle_url('/mod/ratingallocate/view.php', array(
'id' => $this->coursemodule->id)), get_string('back'), 'get');
// Logging.
$event = \mod_ratingallocate\event\ratings_and_allocation_table_viewed::create_simple(
context_module::instance($this->coursemodule->id), $this->ratingallocateid);
$event->trigger();
}
return $output;
}
private function process_action_show_allocation_table() {
$output = '';
// Print ratings table.
if (has_capability('mod/ratingallocate:start_distribution', $this->context)) {
global $OUTPUT;
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
$output .= $renderer->allocation_table_for_ratingallocate($this);
$output .= html_writer::empty_tag('br', array());
$output .= $OUTPUT->single_button(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)), get_string('back'), 'get');
// Logging.
$event = \mod_ratingallocate\event\allocation_table_viewed::create_simple(
context_module::instance($this->coursemodule->id), $this->ratingallocateid);
$event->trigger();
}
return $output;
}
private function process_action_show_statistics() {
$output = '';
// Print ratings table.
if (has_capability('mod/ratingallocate:start_distribution', $this->context)) {
global $OUTPUT;
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
$output .= $renderer->statistics_table_for_ratingallocate($this);
$output .= html_writer::empty_tag('br', array());
$output .= $OUTPUT->single_button(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)), get_string('back'), 'get');
// Logging.
$event = \mod_ratingallocate\event\allocation_statistics_viewed::create_simple(
context_module::instance($this->coursemodule->id), $this->ratingallocateid);
$event->trigger();
}
return $output;
}
private function process_publish_allocations() {
$status = $this->get_status();
if ($status === self::DISTRIBUTION_STATUS_READY_ALLOC_STARTED) {
$this->publish_allocation();
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)),
get_string('distribution_published', ratingallocate_MOD_NAME),
null,
\core\output\notification::NOTIFY_SUCCESS);
}
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)));
}
private function process_action_allocation_to_grouping() {
$this->synchronize_allocation_and_grouping();
redirect(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id)),
get_string('moodlegroups_created', ratingallocate_MOD_NAME),
null,
\core\output\notification::NOTIFY_SUCCESS);
}
private function process_default() {
global $OUTPUT;
$output = '';
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
$status = $this->get_status();
if (has_capability('mod/ratingallocate:give_rating', $this->context, null, false)) {
if ($status === self::DISTRIBUTION_STATUS_RATING_IN_PROGRESS) {
if ($this->is_setup_ok()) {
$output .= $OUTPUT->single_button(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id,
'action' => ACTION_GIVE_RATING)),
get_string('edit_rating', ratingallocate_MOD_NAME), 'get');
$output .= $OUTPUT->single_button(new moodle_url('/mod/ratingallocate/view.php',
array('id' => $this->coursemodule->id,
'action' => ACTION_DELETE_RATING)),
get_string('delete_rating', ratingallocate_MOD_NAME), 'get');
} else {
$renderer->add_notification(get_string('no_rating_possible', ratingallocate_MOD_NAME));
}
}
}
// Print data and controls to edit the choices.
if (has_capability('mod/ratingallocate:modify_choices', $this->context)) {
$output .= $renderer->modify_choices_group($this->ratingallocateid, $this->coursemodule->id, $status);
}
// Print data and controls for teachers.
if (has_capability('mod/ratingallocate:start_distribution', $this->context)) {
$output .= $renderer->modify_allocation_group($this->ratingallocateid, $this->coursemodule->id, $status,
(int) $this->ratingallocate->algorithmstatus, (boolean) $this->ratingallocate->runalgorithmbycron);
$output .= $renderer->publish_allocation_group($this->ratingallocateid, $this->coursemodule->id, $status);
$output .= $renderer->reports_group($this->ratingallocateid, $this->coursemodule->id, $status, $this->context);
}
// Logging.
$event = \mod_ratingallocate\event\ratingallocate_viewed::create_simple(
context_module::instance($this->coursemodule->id), $this->ratingallocateid);
$event->trigger();
return $output;
}
// States if the ratingallocate info schould be displayed.
private $showinfo = true;
/**
* This is what the view.php calls to make the output
*/
public function handle_view() {
global $PAGE, $USER;
$action = optional_param('action', '', PARAM_TEXT);
$PAGE->set_cacheable(false); // TODO necessary.
// Output starts here.
$output = '';
/* @var mod_ratingallocate_renderer */
$renderer = $this->get_renderer();
switch ($action) {
case ACTION_START_DISTRIBUTION:
$output .= $this->process_action_start_distribution();
break;
case ACTION_GIVE_RATING:
$output .= $this->process_action_give_rating();
$this->showinfo = false;
break;
case ACTION_DELETE_RATING:
$this->process_action_delete_rating();
break;
case ACTION_SHOW_CHOICES:
$this->process_action_show_choices();
return "";
case ACTION_EDIT_CHOICE:
$result = $this->process_action_edit_choice();
if (!$result) {
return "";
}
$output .= $result;
$this->showinfo = false;
break;
case ACTION_ENABLE_CHOICE:
$this->process_action_enable_choice(true);
return "";
case ACTION_DISABLE_CHOICE:
$this->process_action_enable_choice(false);
return "";
case ACTION_DELETE_CHOICE:
$this->process_action_delete_choice();
return "";
case ACTION_PUBLISH_ALLOCATIONS:
$this->process_publish_allocations();
break;
case ACTION_ALLOCATION_TO_GROUPING:
$this->process_action_allocation_to_grouping();
break;
case ACTION_MANUAL_ALLOCATION:
$output .= $this->process_action_manual_allocation();
break;
case ACTION_SHOW_RATINGS_AND_ALLOCATION_TABLE:
$output .= $this->process_action_show_ratings_and_alloc_table();
$this->showinfo = false;
break;
case ACTION_SHOW_ALLOCATION_TABLE:
$output .= $this->process_action_show_allocation_table();
$this->showinfo = false;
break;
case ACTION_SHOW_STATISTICS:
$output .= $this->process_action_show_statistics();
$this->showinfo = false;
break;
default:
$output .= $this->process_default();
}
if ($this->showinfo) {
$choicestatus = new ratingallocate_choice_status();
$choicestatus->accesstimestart = $this->ratingallocate->accesstimestart;
$choicestatus->accesstimestop = $this->ratingallocate->accesstimestop;
$choicestatus->publishdate = $this->ratingallocate->publishdate;
$choicestatus->is_published = $this->ratingallocate->published;
$choicestatus->available_choices = $this->get_rateable_choices();
$strategysettings = $this->get_strategy_class()->get_static_settingfields();
if (array_key_exists(ratingallocate\strategy_order\strategy::COUNTOPTIONS, $strategysettings)) {
$choicestatus->necessary_choices =
$strategysettings[ratingallocate\strategy_order\strategy::COUNTOPTIONS][2];
} else {
$choicestatus->necessary_choices = 0;
}
$choicestatus->own_choices = $this->get_rating_data_for_user($USER->id);
$choicestatus->allocations = $this->get_allocations_for_user($USER->id);
$choicestatus->strategy = $this->get_strategy_class();
$choicestatus->show_distribution_info = has_capability('mod/ratingallocate:start_distribution', $this->context);
$choicestatus->show_user_info = has_capability('mod/ratingallocate:give_rating', $this->context, null, false);
$choicestatus->algorithmstarttime = $this->ratingallocate->algorithmstarttime;
$choicestatus->algorithmstatus = $this->get_algorithm_status();
$choicestatusoutput = $renderer->render($choicestatus);
} else {
$choicestatusoutput = "";
}
$header = $renderer->render_header($this->ratingallocate, $this->context, $this->coursemodule->id);
$footer = $renderer->render_footer();
return $header . $choicestatusoutput . $output . $footer;
}
/**
* Returns the number of all users that placed a rating on the current ratingallocate activity.
* @param int $courseid course id
* @return int
*/
public function get_number_of_active_raters() {
$sql = 'SELECT COUNT(DISTINCT ra_ratings.userid) AS number
FROM {ratingallocate} as ra INNER JOIN {ratingallocate_choices} as ra_choices
ON ra.id = ra_choices.ratingallocateid INNER JOIN {ratingallocate_ratings} as ra_ratings
ON ra_choices.id = ra_ratings.choiceid
WHERE ra.course = :courseid AND ra.id = :ratingallocateid';
$numberofratersfromdb = $this->db->get_field_sql($sql, array(
'courseid' => $this->course->id, 'ratingallocateid' => $this->ratingallocateid));
return (int)$numberofratersfromdb;
}
/**
* Returns all ratings for active choices
*/
public function get_ratings_for_rateable_choices() {
$sql = 'SELECT r.*
FROM {ratingallocate_choices} c
JOIN {ratingallocate_ratings} r
ON c.id = r.choiceid
WHERE c.ratingallocateid = :ratingallocateid AND c.active = 1';
$ratings = $this->db->get_records_sql($sql, array(
'ratingallocateid' => $this->ratingallocateid
));
$raters = $this->get_raters_in_course();
// Filter out everyone who can't give ratings.
$fromraters = array_filter($ratings, function ($rating) use($raters) {
return array_key_exists($rating->userid, $raters);
});
return $fromraters;
}
/**
* distribution of choices for each user
* take care about max_execution_time and memory_limit
*/
public function distrubute_choices() {
require_capability('mod/ratingallocate:start_distribution', $this->context);
// Set algorithm status to running.
$this->origdbrecord->algorithmstatus = \mod_ratingallocate\algorithm_status::running;
$this->origdbrecord->algorithmstarttime = time();
$this->db->update_record(this_db\ratingallocate::TABLE, $this->origdbrecord);
$distributor = new solver_edmonds_karp();
// $distributor = new solver_ford_fulkerson();
$timestart = microtime(true);
$distributor->distribute_users($this);
$timeneeded = (microtime(true) - $timestart);
// echo memory_get_peak_usage();
// Set algorithm status to finished.
$this->origdbrecord->algorithmstatus = \mod_ratingallocate\algorithm_status::finished;
$this->db->update_record(this_db\ratingallocate::TABLE, $this->origdbrecord);
return $timeneeded;
}
/**
* Creates moodle groups from the current ratingallocate allocation or synchronizes the group user assignments
* based on the current allocation.
* @throws coding_exception
* @throws moodle_exception
* @throws required_capability_exception
*/
public function synchronize_allocation_and_grouping() {
require_capability('moodle/course:managegroups', $this->context);
$groupingidname = ratingallocate_MOD_NAME . '_instid_' . $this->ratingallocateid;
// Search if there is already a grouping from us.
$grouping = groups_get_grouping_by_idnumber($this->course->id, $groupingidname);
$groupingid = null;
if (!$grouping) {
// Create grouping.
$data = new stdClass();
$data->name = get_string('groupingname', ratingallocate_MOD_NAME, $this->ratingallocate->name);
$data->idnumber = $groupingidname;
$data->courseid = $this->course->id;
$groupingid = groups_create_grouping($data);
} else {
$groupingid = $grouping->id;
}
$groupidentifierfromchoiceid = function ($choiceid) {
return ratingallocate_MOD_NAME . '_c_' . $choiceid;
};
$choices = $this->get_choices_with_allocationcount();
// Make a new array containing only the identifiers of the choices.
$choiceids = array();
foreach ($choices as $id => $choice) {
$choiceids[$groupidentifierfromchoiceid($choice->id)] = array('key' => $id);
}
// Dind all associated groups in this grouping.
$groups = groups_get_all_groups($this->course->id, 0, $groupingid);
// Loop through the groups in the grouping: if the choice does not exist anymore -> delete.
// Otherwise mark it.
foreach ($groups as $group) {
if (array_key_exists($group->idnumber, $choiceids)) {
// Group exists, mark.
$choiceids[$group->idnumber]['exists'] = true;
$choiceids[$group->idnumber]['groupid'] = $group->id;
} else {
// Delete group $group->id.
groups_delete_group($group->id);
}
}
// Create groups groups for new identifiers or empty group if it exists.
foreach ($choiceids as $groupid => $choice) {
if (key_exists('exists', $choice)) {
// Remove all members.
groups_delete_group_members_by_group($choice['groupid']);
} else {
$data = new stdClass();
$data->courseid = $this->course->id;
$data->name = $choices[$choice['key']]->title;
$data->idnumber = $groupid;
$createdid = groups_create_group($data);
groups_assign_grouping($groupingid, $createdid);
$choiceids[$groupid]['groupid'] = $createdid;
}
}
// Add all participants in the correct group.
$allocations = $this->get_allocations();
foreach ($allocations as $id => $allocation) {
$choiceid = $allocation->choiceid;
$userid = $allocation->userid;
$choiceidentifier = $groupidentifierfromchoiceid($choiceid);
groups_add_member($choiceids[$choiceidentifier]['groupid'], $userid);
}
// Invalidate the grouping cache for the course.
cache_helper::invalidate_by_definition('core', 'groupdata', array(), array($this->course->id));
}
/**
* Publish the allocation and schedule to send the notifications to the participants.
*/
public function publish_allocation() {
require_capability('mod/ratingallocate:start_distribution', $this->context);
$this->origdbrecord->{this_db\ratingallocate::PUBLISHED} = true;
$this->origdbrecord->{this_db\ratingallocate::PUBLISHDATE} = time();
$this->origdbrecord->{this_db\ratingallocate::NOTIFICATIONSEND} = -1;
$this->ratingallocate = new ratingallocate_db_wrapper($this->origdbrecord);
$this->db->update_record(this_db\ratingallocate::TABLE, $this->origdbrecord);
// Create the instance.
$task = new mod_ratingallocate\task\send_distribution_notification();
// Add custom data.
$task->set_component('mod_ratingallocate');
$task->set_custom_data(array(
'ratingallocateid' => $this->ratingallocateid
));
// Queue it.
\core\task\manager::queue_adhoc_task($task);
// Logging.
$event = \mod_ratingallocate\event\allocation_published::create_simple(
context_module::instance($this->coursemodule->id), $this->ratingallocateid);
$event->trigger();
}
/**
* Call this function when the algorithm failed and the algorithm status has to be set to failed.
*/
public function set_algorithm_failed() {
$this->origdbrecord->algorithmstatus = \mod_ratingallocate\algorithm_status::failure;
$this->db->update_record(this_db\ratingallocate::TABLE, $this->origdbrecord);
}
/**
* Returns all users, that have not been allocated but have given ratings
*
* @return array;
*/
public function get_ratings_for_rateable_choices_for_raters_without_alloc() {
$sql = 'SELECT al.*
FROM {ratingallocate_allocations} al
WHERE al.ratingallocateid = :ratingallocateid';
$allocated = $this->db->get_records_sql($sql, array(
'ratingallocateid' => $this->ratingallocateid
));
$ratings = $this->get_ratings_for_rateable_choices();
// Macht daraus ein Array mit userid => quatsch.
$allocated = array_flip(array_map(function ($entry) {
return $entry->userid;
}, $allocated));
// Filter out everyone who already has an allocation.
$unallocraters = array_filter($ratings, function ($ratings) use($allocated) {
return !array_key_exists($ratings->userid, $allocated);