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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* A scheduled task for chat cron.
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*
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* @package mod_chat
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* @copyright 2019 Simey Lameze <simey@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace mod_chat\task;
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defined('MOODLE_INTERNAL') || die();
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/**
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* The main schedule task for the chat module.
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*
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* @package mod_chat
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* @copyright 2019 Simey Lameze <simey@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class cron_task extends \core\task\scheduled_task {
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/**
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* Get a descriptive name for this task (shown to admins).
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*
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* @return string
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*/
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public function get_name() {
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return get_string('crontask', 'mod_chat');
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}
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/**
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* Run chat cron.
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*/
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public function execute() {
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global $CFG, $DB;
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require_once($CFG->dirroot . '/mod/chat/lib.php');
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chat_update_chat_times();
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chat_delete_old_users();
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$timenow = time();
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$subselect = "SELECT c.keepdays
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FROM {chat} c
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WHERE c.id = {chat_messages}.chatid";
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$DB->delete_records_select('chat_messages', "($subselect) > 0 AND timestamp < (? - ($subselect) * ?)",
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[$timenow, DAYSECS]);
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$DB->delete_records_select('chat_messages_current', "timestamp < ?", [$timenow - 8 * HOURSECS]);
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}
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}
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