<?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 storing issued certificates.
 *
 * @package    local_certlog
 * @copyright  2017 Mark Nelson <markn@moodle.com>, 2021 Klaus-Uwe Mitterer <kumitterer@kumi.systems>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
namespace local_certlog\task;

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

/**
 * A scheduled task for storing issued certificates.
 *
 * @package    local_certlog
 * @copyright  2017 Mark Nelson <markn@moodle.com>, 2021 Klaus-Uwe Mitterer <kumitterer@kumi.systems>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class get_issues_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('taskgetissues', 'local_certlog');
    }

    /**
     * Execute.
     */
    public function execute() {
        global $DB, $PAGE;

        foreach (array("customcert", "htmlcert") as $module) {
            $issuetable = $module . '_issues';
            $certidfield = $module . 'id';
	    $lb = "{";
	    $rb = "}";
            $cur = $DB->get_field("certlog", "MAX(originid)", array("originname" => $module)) ?: 0;

            $sql = "SELECT i.id AS originid, i.timecreated AS timestamp, 
                           m.course AS course, i.userid AS user, 
                           \"$module\" AS originname 
                    FROM   $lb$issuetable$rb i
                    JOIN   $lb$module$rb m
                    ON     i.$certidfield = m.id
                    WHERE  i.id > :id";

            $newer = $DB->get_records_sql($sql, array('id' => $cur));
            
            $DB->insert_records("certlog", $newer);
        }
    }
}