MOODLE: Eventos al borrar un curso

MOODLE: Eventos al borrar un curso1

<?php
// local/altamarimport/db/events.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/>.

/**
 * Event observer.
 *
 * @package   block_recent_activity
 * @category  event
 * @copyright 2014 Marina Glancy
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

$observers = array (
    array (
        'eventname' => '\core\event\course_deleted',
        'callback'  => 'local_altamarimport_observer::delete'
    )
);

MOODLE: Eventos al borrar un curso2

<?php
// local/altamarimport/classes/observer.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/>.

/**
 * Event observer.
 *
 * @package    local_altamarimport
 * @copyright  2017 Raúl Martínez
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

/**
 * Event observer.
 *
 * @package    local_altamarimport
 * @copyright  2017 Raúl Martínez
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class local_altamarimport_observer {

    /**
     * Delete all images and URL from Altamar when a course is deleted.
     *
     * @param \core\event\base $event
     */
    public static function delete(\core\event\course_deleted $event) {
        global $DB;

        $courseid = $event->objectid;

        $DB->delete_records('config_plugins', array('plugin' => 'local_altamarimport', 'name' => 'coursecover_'.$courseid));

        $DB->delete_records_select('config_plugins', $DB->sql_like('name', '?'), array('%sectioncover_'.$courseid.'_%'));

        $DB->delete_records_select('config_plugins', $DB->sql_like('name', '?'), array('%sectioncovertn_'.$courseid.'_%'));
    }
}