110 lines
No EOL
2.9 KiB
PHP
110 lines
No EOL
2.9 KiB
PHP
<?php
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namespace local_treestudyplan;
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require_once($CFG->libdir.'/externallib.php');
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class studyitemconnection {
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const TABLE = "local_treestudyplan_connect";
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private $r;
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private $id;
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protected function __construct($r){
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$this->r = $r;
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$this->id = $r->id;
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}
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public static function structure($value=VALUE_REQUIRED){
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return new \external_single_structure([
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'id' => new \external_value(PARAM_INT, 'id of connection'),
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'from_id' => new \external_value(PARAM_INT, 'id of start item'),
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'to_id' => new \external_value(PARAM_INT, 'id of end item'),
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],'',$value);
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}
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public function model(){
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return ['id' => $this->r->id, 'from_id' => $this->r->from_id, 'to_id' => $this->r->to_id];
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}
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public function from_item(){
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return studyitem::findById($this->r->from_id);
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}
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public function to_item(){
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return studyitem::findById($this->r->to_id);
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}
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public function from_id(){
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return $this->r->from_id;
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}
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public function to_id(){
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return $this->r->to_id;
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}
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public static function find_outgoing($item_id){
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global $DB;
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$list = [];
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$conn_out = $DB->get_records(self::TABLE,['from_id' => $item_id]);
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foreach($conn_out as $c) {
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$list[] = new self($c);
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}
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return $list;
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}
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public static function find_incoming($item_id){
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global $DB;
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$list = [];
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$conn_in = $DB->get_records(self::TABLE,['to_id' => $item_id]);
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foreach($conn_in as $c) {
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$list[] = new self($c);
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}
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return $list;
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}
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public static function connect($from_id,$to_id)
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{
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global $DB;
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//check if link already exists
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if(!$DB->record_exists(self::TABLE, ['from_id' => $from_id, 'to_id' => $to_id]))
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{
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$id = $DB->insert_record(self::TABLE, [
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'from_id' => $from_id,
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'to_id' => $to_id,
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]);
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return new self($DB->get_record(self::TABLE,['id' => $id]));
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} else {
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return new self($DB->get_record(self::TABLE,['from_id' => $from_id, 'to_id' => $to_id]));
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}
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}
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public static function disconnect($from_id,$to_id)
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{
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global $DB;
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if($DB->record_exists(self::TABLE, ['from_id' => $from_id, 'to_id' => $to_id]))
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{
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$DB->delete_records(self::TABLE, [
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'from_id' => $from_id,
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'to_id' => $to_id,
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]);
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return success::success('Items Disconnected');
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} else {
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return success::success('Connection does not exist');
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}
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}
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public static function clear($id) {
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global $DB;
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$DB->delete_records(self::TABLE, ['from_id' => $id]);
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$DB->delete_records(self::TABLE, ['to_id' => $id]);
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}
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} |