moodle_local_treestudyplan/classes/studyitemconnection.php
2023-08-25 10:41:56 +02:00

125 lines
3.6 KiB
PHP

<?php
// This file is part of the Studyplan plugin for Moodle
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <https://www.gnu.org/licenses/>.
/**
*
* @package local_treestudyplan
* @copyright 2023 P.M. Kuipers
* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace local_treestudyplan;
require_once($CFG->libdir.'/externallib.php');
class studyitemconnection {
const TABLE = "local_treestudyplan_connect";
private $r;
private $id;
protected function __construct($r) {
$this->r = $r;
$this->id = $r->id;
}
public static function structure($value=VALUE_REQUIRED) {
return new \external_single_structure([
'id' => new \external_value(PARAM_INT, 'id of connection'),
'from_id' => new \external_value(PARAM_INT, 'id of start item'),
'to_id' => new \external_value(PARAM_INT, 'id of end item'),
], '', $value);
}
public function model() {
return ['id' => $this->r->id, 'from_id' => $this->r->from_id, 'to_id' => $this->r->to_id];
}
public function from_item() {
return studyitem::findById($this->r->from_id);
}
public function to_item() {
return studyitem::findById($this->r->to_id);
}
public function from_id() {
return $this->r->from_id;
}
public function to_id() {
return $this->r->to_id;
}
public static function find_outgoing($itemid) {
global $DB;
$list = [];
$connout = $DB->get_records(self::TABLE, ['from_id' => $itemid]);
foreach ($connout as $c) {
$list[] = new self($c);
}
return $list;
}
public static function find_incoming($itemid) {
global $DB;
$list = [];
$connin = $DB->get_records(self::TABLE, ['to_id' => $itemid]);
foreach ($connin as $c) {
$list[] = new self($c);
}
return $list;
}
public static function connect($fromid, $toid) {
global $DB;
//check if link already exists.
if (!$DB->record_exists(self::TABLE, ['from_id' => $fromid, 'to_id' => $toid])) {
$id = $DB->insert_record(self::TABLE, [
'from_id' => $fromid,
'to_id' => $toid,
]);
return new self($DB->get_record(self::TABLE, ['id' => $id]));
} else {
return new self($DB->get_record(self::TABLE, ['from_id' => $fromid, 'to_id' => $toid]));
}
}
public static function disconnect($fromid, $toid) {
global $DB;
if ($DB->record_exists(self::TABLE, ['from_id' => $fromid, 'to_id' => $toid])) {
$DB->delete_records(self::TABLE, [
'from_id' => $fromid,
'to_id' => $toid,
]);
return success::success('Items Disconnected');
} else {
return success::success('Connection does not exist');
}
}
public static function clear($id) {
global $DB;
$DB->delete_records(self::TABLE, ['from_id' => $id]);
$DB->delete_records(self::TABLE, ['to_id' => $id]);
}
}