id; $records = $DB->get_records(self::TABLE,['teacher_id' => $userid]); if(count($records) == 0){ // initiate a search if the cache is empty self::update_teaching_cache($userid); $DB->get_records(self::TABLE,['teacher_id' => $userid]); } $list = []; foreach($records as $r){ $list[] = studyplan::findById($r->studyplan_id); } return $list; } /** * Find The active studyplans where the specified user is a teacher * (Has the mod/assign::grade capability in one of the linked courses) * TODO: OPTIMIZE THIS CHECK!!! */ public static function update_teaching_cache($userid){ global $DB; $list = []; // First find all active study plans $sql = "SELECT p.id FROM {local_treestudyplan_page} p WHERE startdate <= NOW() and enddate >= NOW()"; $page_ids = $DB->get_fieldset_sql($sql, []); // then parse them to see if the user has the grading permission in any of them // (Which would make them a teacher for all intents and purposes) foreach($page_ids as $page_id) { $sql = "SELECT i.course_id FROM {local_treestudyplan_item} i INNER JOIN {local_treestudyplan_line} l ON i.line_id = l.id WHERE l.page_id = :page_id AND i.course_id IS NOT NULL"; $course_ids = $DB->get_fieldset_sql($sql, ["page_id" => $page_id]); $linked = false; foreach($course_ids as $cid){ $coursecontext = \context_course::instance($cid); if (is_enrolled($coursecontext, $userid, 'mod/assign:grade')){ $linked = true; break; // No need to search further } } if($linked) { $list[] = $page_id; } } // Now, clear the database of all records for this user $DB->delete_records(self::TABLE,["teacher_id"=>$userid]); // And add new records for the found studyplans $now = time(); foreach($list as $page_id){ // Retrieve the studyplan id from the page //TODO: Change this when page management is implemented to return the page instead of the plan $planid = $DB->get_field("local_treestudyplan_page","studyplan_id",["page_id" => $page_id]); $DB->insert_record(self::TABLE,["teacher_id"=>$userid,"studyplan_id"=>$planid,"update_time"=>$now]); } return $list; } public static function list_teacher_ids(){ global $DB; return $DB->get_fieldset_sql("SELECT DISTINCT teacher_id FROM {".self::TABLE."}"); } public static function get_update_time($teacher_id): int { global $DB; $r = $DB->get_field_sql("SELECT MIN(update_time)FROM {".self::TABLE."} WHERE teacher_id=:teacher_id", ["teacher_id" => $teacher_id]); return (int)($r->update_time); } }