<?php defined("SYSPATH") or die("No direct script access.");
/**
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2008 Bharat Mediratta
 *
 * This program 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 2 of the License, or (at
 * your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
 */
class Item_Model extends MPTT {
  protected $left_column = "left";
  protected $right_column = "right";

  public function is_album() {
    return $this->type == 'album';
  }

  public function is_photo() {
    return $this->type == 'photo';
  }

  // MPTT::get_children returns null if there are no children; change that to an empty array for
  // consistency.
  public function get_children() {
    $children = parent::get_children();
    if (empty($children)) {
      $children = array();
    }
    return $children;
  }
}