MED-48: Add tag filter to library

classes/form/search.php

@@ -51,6 +51,8 @@ public function definition() {
         $mform->addElement('text', 'query', get_string('keyword', 'tool_mediatime'));
         $mform->setType('query', PARAM_TEXT);
 
+        $this->tag_elements();
+
         $this->add_action_buttons(false, get_string('search'));
     }
 

classes/media_manager.php

@@ -25,6 +25,8 @@
 namespace tool_mediatime;
 
 use context_system;
+use core_tag_tag;
+use core_tag_area;
 use moodle_exception;
 use moodle_url;
 use renderable;
@@ -168,6 +170,7 @@ public static function search($filters = []) {
 
         $params = [];
 
+        // Require enabled source plugins.
         if (!$sources = plugininfo\mediatimesrc::get_enabled_plugins()) {
             return $result;
         }
@@ -176,6 +179,7 @@ public static function search($filters = []) {
         $sql = "source $sql";
         $order = 'timecreated DESC';
 
+        // Filter for text query.
         if ($query = $filters['query'] ?? '') {
             $sql .= ' AND ' . $DB->sql_like('content', ':query', false);
             $params['query'] = "%$query%";
@@ -184,6 +188,15 @@ public static function search($filters = []) {
             $order = 'CASE WHEN ' . $DB->sql_like('name', ':name', false) . ' THEN 1 ELSE 0 END DESC, timecreated DESC';
         }
 
+        // Filter by tags.
+        if ($tags = $filters['tags'] ?? '') {
+            $tagcollid = core_tag_area::get_collection('tool_mediatime', 'media_resources');
+            $tags = core_tag_tag::get_by_name_bulk($tagcollid, $tags);
+            list($tagsql, $tagparams) = $DB->get_in_or_equal(array_column($tags, 'id'), SQL_PARAMS_NAMED, 'tagparams');
+            $sql .= " AND id IN (SELECT itemid FROM {tag_instance} WHERE tagid $tagsql)";
+            $params += $tagparams;
+        }
+
         return $DB->get_recordset_select(
             'tool_mediatime',
             $sql,