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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 for chat cron.
*
* @package mod_chat
* @copyright 2019 Simey Lameze <simey@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace mod_chat\task;
defined('MOODLE_INTERNAL') || die();
/**
* The main schedule task for the chat module.
*
* @package mod_chat
* @copyright 2019 Simey Lameze <simey@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class cron_task extends \core\task\scheduled_task {
/**
* Get a descriptive name for this task (shown to admins).
*
* @return string
*/
public function get_name() {
return get_string('crontask', 'mod_chat');
}
/**
* Run chat cron.
*/
public function execute() {
global $CFG, $DB;
require_once($CFG->dirroot . '/mod/chat/lib.php');
chat_update_chat_times();
chat_delete_old_users();
$timenow = time();
$subselect = "SELECT c.keepdays
FROM {chat} c
WHERE c.id = {chat_messages}.chatid";
$DB->delete_records_select('chat_messages', "($subselect) > 0 AND timestamp < (? - ($subselect) * ?)",
[$timenow, DAYSECS]);
$DB->delete_records_select('chat_messages_current', "timestamp < ?", [$timenow - 8 * HOURSECS]);
}
}