From 83be2f4aa23d8c298a6f304b08e3da909dfb157f Mon Sep 17 00:00:00 2001
From: Kyle Huynh <kyle.huynh205@gmail.com>
Date: Wed, 10 May 2023 13:09:26 +0000
Subject: [PATCH] Added a custom filter and move the query altering to the
 filter instead of a hook

---
 config/schema/group_solr.schema.yml           | 10 +++
 group_solr.module                             | 48 ++++--------
 .../filter/AccessControlWithGroupFilter.php   | 74 +++++++++++++++++++
 3 files changed, 97 insertions(+), 35 deletions(-)
 create mode 100644 config/schema/group_solr.schema.yml
 create mode 100644 src/Plugin/views/filter/AccessControlWithGroupFilter.php

diff --git a/config/schema/group_solr.schema.yml b/config/schema/group_solr.schema.yml
new file mode 100644
index 0000000..25a9560
--- /dev/null
+++ b/config/schema/group_solr.schema.yml
@@ -0,0 +1,10 @@
+views.filter.access_control_with_group_filter:
+  type: views.filter.in_operator
+  label: 'Select access control by Group'
+  mapping:
+    value:
+      type: sequence
+      label: 'Select access control by Group'
+      sequence:
+        type: string
+        label: 'Select access control by Group'
\ No newline at end of file
diff --git a/group_solr.module b/group_solr.module
index a463dc0..73daad8 100644
--- a/group_solr.module
+++ b/group_solr.module
@@ -37,40 +37,18 @@ function group_solr_theme() {
 }
 
 /**
- * Implements hook_views_query_alter
- * @param $view
- * @param $query
- * @return void
+ * Implements hook_views_data().
  */
-function group_solr_views_query_alter($view, $query) {
-  if ($view->id() == 'solr_search_content') {
-    // Get current user
-    $uid = \Drupal::currentUser()->id();
-    $current_user = \Drupal\user\Entity\User::load($uid);
-
-    // Get groups which this user is belonged to
-    $groups = array();
-    $grp_membership_service = \Drupal::service('group.membership_loader');
-    $grps = $grp_membership_service->loadByUser($current_user);
-    foreach ($grps as $grp) {
-      $groups[$grp->getGroup()->id()] = $grp->getGroup()->label();
-    }
+function group_solr_views_data_alter(array &$data) {
+
+  $data['views']['access_control_with_group_filter'] = [
+    'title' => t('Access Control Filter - Configurable with Group'),
+    'group' => t('Access control'),
+    'filter' => [
+      'title' => t('Access Control Filter - Configurable with Group'),
+      'field' => 'group_access_control',
+      'id' => 'access_control_with_group_filter',
+    ],
+  ];
 
-    if (count($groups) > 0) {
-      // - from those group, get the taxonomy term in field_access_terms
-      // - from those terms, get term ids
-      $terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')->loadTree("islandora_access");
-      $conditions = $query->createConditionGroup('OR');
-      $conditions->addCondition("group_access_control", '200', "=");
-      foreach ($terms as $term) {
-        if (in_array($term->name, $groups)) {
-          $conditions->addCondition('group_access_control', $term->name, "IN");
-        }
-      }
-      $query->addConditionGroup($conditions);
-    }
-    else {
-      $query->addCondition('group_access_control', "200", '=');
-    }
-  }
-}
+}
\ No newline at end of file
diff --git a/src/Plugin/views/filter/AccessControlWithGroupFilter.php b/src/Plugin/views/filter/AccessControlWithGroupFilter.php
new file mode 100644
index 0000000..ac0ac4c
--- /dev/null
+++ b/src/Plugin/views/filter/AccessControlWithGroupFilter.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Drupal\group_solr\Plugin\views\filter;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\views\Plugin\views\filter\StringFilter;
+use Drupal\views\Plugin\views\filter\BooleanOperator;
+use Drupal\views\Plugin\views\display\DisplayPluginBase;
+use Drupal\views\Plugin\views\filter\InOperator;
+use Drupal\views\Plugin\views\filter\Standard;
+use Drupal\views\ViewExecutable;
+
+/**
+ * Filter by start and end date.
+ *
+ * @ingroup views_filter_handlers
+ *
+ * @ViewsFilter("access_control_with_group_filter")
+ */
+class AccessControlWithGroupFilter extends Standard{
+
+  /**
+   * {@inheritdoc}
+   */
+  public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
+    parent::init($view, $display, $options);
+  }
+
+  /**
+   * Override the query so that no filtering takes place if the user doesn't
+   * select any options.
+   */
+  public function query() {
+    $query = $this->query;
+
+    // Get current user
+    $uid = \Drupal::currentUser()->id();
+    $current_user = \Drupal\user\Entity\User::load($uid);
+
+    // Get groups which this user is belonged to
+    $groups = array();
+    $grp_membership_service = \Drupal::service('group.membership_loader');
+    $grps = $grp_membership_service->loadByUser($current_user);
+    foreach ($grps as $grp) {
+      $groups[$grp->getGroup()->id()] = $grp->getGroup()->label();
+    }
+
+    if (count($groups) > 0) {
+      // - from those group, get the taxonomy term in field_access_terms
+      // - from those terms, get term ids
+      $terms = \Drupal::entityTypeManager()->getStorage('taxonomy_term')->loadTree("islandora_access");
+      $conditions = $query->createConditionGroup('OR');
+      $conditions->addCondition("group_access_control", '200', "=");
+      foreach ($terms as $term) {
+        if (in_array($term->name, $groups)) {
+          $conditions->addCondition('group_access_control', $term->name, "IN");
+        }
+      }
+      $query->addConditionGroup($conditions);
+    }
+    else {
+      $query->addCondition('group_access_control', "200", '=');
+    }
+  }
+
+  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
+    parent::buildOptionsForm($form, $form_state);
+    $form["filter-descritpion"] = [
+      "#markup" => $this->t("Adding this fitler, it will check current user 
+      with the existing access control with Groups and filter the results.")
+    ];
+    unset($form['expose_button']);
+  }
+}
\ No newline at end of file