<?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/>.

/**
 * Legacy log reader.
 *
 * @package    logstore_legacy
 * @copyright  2014 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace logstore_legacy\task;

defined('MOODLE_INTERNAL') || die();

class cleanup_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('taskcleanup', 'logstore_legacy');
    }

    /**
     * Do the job.
     * Throw exceptions on errors (the job will be retried).
     */
    public function execute() {
        global $CFG, $DB;

        // Delete old logs to save space (this might need a timer to slow it down...).
        if (!empty($CFG->loglifetime)) { // Value in days.
            $loglifetime = time(0) - ($CFG->loglifetime * 3600 * 24);
            $DB->delete_records_select("log", "time < ?", array($loglifetime));
            mtrace(" Deleted old legacy log records");
        }
    }
}