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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/>.

/**
 * Abstract comment deleted event.
 *
 * @package    core
 * @copyright  2013 Rajesh Taneja <rajesh@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

namespace core\event;

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

/**
 * Abstract comment deleted event class.
 *
 * This class has to be extended by any event which is triggred while deleting comment.
 *
 * @property-read array $other {
 *      Extra information about event.
 *
 *      - int itemid: id of item for which comment is deleted.
 * }
 *
 * @package    core
 * @since      Moodle 2.7
 * @copyright  2013 Rajesh Taneja <rajesh@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
abstract class comment_deleted extends base {

/**
     * Init method.
     *
     * @return void
     */
    protected function init() {
        $this->data['crud'] = 'd';
        $this->data['edulevel'] = self::LEVEL_PARTICIPATING;
        $this->data['objecttable'] = 'comments';
    }

/**
     * Return localised event name.
     *
     * @return string
     */
    public static function get_name() {
        return get_string('eventcommentdeleted', 'moodle');
    }

/**
     * Returns description of what happened.
     *
     * @return string
     */
    public function get_description() {
        return "The user with id '$this->userid' deleted the comment with id '$this->objectid' from the '$this->component' " .
            "with course module id '$this->contextinstanceid'.";
    }

/**
     * Get URL related to the action.
     *
     * @return \moodle_url
     */
    public function get_url() {
        $context = $this->get_context();
        if ($context) {
            return $context->get_url();
        } else {
            return null;
        }
    }

/**
     * Custom validation.
     *
     * @throws \coding_exception
     * @return void
     */
    protected function validate_data() {
        parent::validate_data();
        if (!isset($this->other['itemid'])) {
            throw new \coding_exception('The \'itemid\' value must be set in other.');
        }
    }

public static function get_objectid_mapping() {
        return array('db' => 'comments', 'restore' => 'comment');
    }

public static function get_other_mapping() {
        // We cannot map fields that do not have a 1:1 mapping.
        $othermapped = array();
        $othermapped['itemid'] = base::NOT_MAPPED;
        return $othermapped;
    }
}