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