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<?php
// This file is part of Moodle - http://moodle.org/
//
// 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 <http://www.gnu.org/licenses/>.
/**
* A scheduled task.
*
* @package core
* @copyright 2013 onwards Martin Dougiamas http://dougiamas.com
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core\task;
/**
* Simple task to delete old backup records.
*/
class backup_cleanup_task extends scheduled_task {
/**
* Get a descriptive name for this task (shown to admins).
*
* @return string
*/
public function get_name() {
return get_string('taskbackupcleanup', 'admin');
}
/**
* Do the job.
* Throw exceptions on errors (the job will be retried).
*/
public function execute() {
global $DB;
$loglifetime = get_config('backup', 'loglifetime');
if (empty($loglifetime)) {
throw new coding_exception('The \'loglifetime\' config is not set. Can\'t proceed and delete old backup records.');
}
// First, get the list of all backupids older than loglifetime.
$timecreated = time() - ($loglifetime * DAYSECS);
$records = $DB->get_records_select('backup_controllers', 'timecreated < ?', array($timecreated), 'id', 'id, backupid');
foreach ($records as $record) {
// Check if there is no incomplete adhoc task relying on the given backupid.
$params = array('%' . $record->backupid . '%');
$select = $DB->sql_like('customdata', '?', false);
$count = $DB->count_records_select('task_adhoc', $select, $params);
if ($count === 0) {
// Looks like there is no adhoc task, so we can delete logs and controllers for this backupid.
$DB->delete_records('backup_logs', array('backupid' => $record->backupid));
$DB->delete_records('backup_controllers', array('backupid' => $record->backupid));
}
}
}
}