moodle_local_treestudyplan/classes/task/refreshteacherlist.php

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<?php
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// 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/>.
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/**
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* Background task to refresh the list of associaded teachers with studyplans
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* @package local_treestudyplan
* @copyright 2023 P.M. Kuipers
* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace local_treestudyplan\task;
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defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot.'/course/externallib.php');
use local_treestudyplan\teachingfinder;
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/**
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* Background task to refresh the list of associaded teachers with studyplans
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*/
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class refreshteacherlist extends \core\task\scheduled_task {
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/**
* Maximum time a result is valid before refreshing
* @var int
*/
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const CACHE_TIME = 4 * 60 * 60; // 2 hours.
/**
* Return the task's name as shown in admin screens.
*
* @return string
*/
public function get_name() {
return get_string('refreshteacherlist_name', 'local_treestudyplan');
}
/**
* Execute the task.
*/
public function execute() {
\mtrace("Ververs lijst met leraren");
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$teacherids = teachingfinder::list_teacher_ids();
foreach ($teacherids as $tid) {
$utime = teachingfinder::get_update_time($tid);
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if (time() - $utime > self::CACHE_TIME) {
\mtrace("Teacher {$tid} is due for a refresh of the list");
teachingfinder::update_teaching_cache($tid);
}
}
}
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}