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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/>.

/**
 * The mod_lesson page_moved event class.
 *
 * @package    mod_lesson
 * @copyright  2015 Stephen Bourget
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later.
 */

namespace mod_lesson\event;

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

/**
 * The mod_lesson page_moved event class.
 *
 * @property-read array $other {
 *     Extra information about event.
 *
 *     - string pagetype: the name of the pagetype as defined in the individual page class
 *     - int prevpageid: the id of the previous lesson page
 *     - int nextpageid: the id of the next lesson page
 * }
 *
 * @package    mod_lesson
 * @since      Moodle 2.9
 * @copyright  2015 Stephen Bourget
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later.
 */
class page_moved extends \core\event\base {

/**
     * Set basic properties for the event.
     */
    protected function init() {
        $this->data['objecttable'] = 'lesson_pages';
        $this->data['crud'] = 'u';
        $this->data['edulevel'] = self::LEVEL_TEACHING;
    }

/**
     * Returns localised general event name.
     *
     * @return string
     */
    public static function get_name() {
        return get_string('eventpagemoved', 'mod_lesson');
    }

/**
     * Get URL related to the action.
     *
     * @return \moodle_url
     */
    public function get_url() {
        return new \moodle_url('/mod/lesson/view.php', array('id' => $this->contextinstanceid, 'pageid' => $this->objectid));
    }

/**
     * Returns non-localised event description with id's for admin use only.
     *
     * @return string
     */
    public function get_description() {
        return "The user with id '$this->userid' has moved a ".$this->other['pagetype']." page with the ".
                "id '$this->objectid' to the slot after the page with the id '".$this->other['prevpageid'].
                "' and before the page with the id '".$this->other['nextpageid'].
                "' in the lesson activity with course module id '$this->contextinstanceid'.";
    }

/**
     * Custom validations.
     *
     * @throws \coding_exception when validation fails.
     * @return void
     */
    protected function validate_data() {
        parent::validate_data();
        // Make sure this class is never used without proper object details.
        if (!$this->contextlevel === CONTEXT_MODULE) {
            throw new \coding_exception('Context level must be CONTEXT_MODULE.');
        }
        if (!isset($this->other['pagetype'])) {
            throw new \coding_exception('The \'pagetype\' value must be set in other.');
        }
        if (!isset($this->other['prevpageid'])) {
            throw new \coding_exception('The \'prevpageid\' value must be set in other.');
        }
        if (!isset($this->other['nextpageid'])) {
            throw new \coding_exception('The \'nextpageid\' value must be set in other.');
        }
    }

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

public static function get_other_mapping() {
        $othermapped = array();
        $othermapped['prevpageid'] = array('db' => 'lesson_pages', 'restore' => 'lesson_page');
        $othermapped['nextpageid'] = array('db' => 'lesson_pages', 'restore' => 'lesson_page');

return $othermapped;
    }
}