Sindbad~EG File Manager

<?php
/*
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2007 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.
 */

/**
 * Utility functions useful in managing GalleryDerivatives
 * @package GalleryCore
 * @subpackage Helpers
 * @author Bharat Mediratta <bharat@menalto.com>
 * @version $Revision: 15513 $
 * @static
 */
class GalleryDerivativeHelper_medium {

    /**
     * @see GalleryCoreApi::fetchResizesByItemIds
     */
    function fetchResizesByItemIds($ids) {
	if (!is_array($ids)) {
	    return array(GalleryCoreApi::error(ERROR_BAD_PARAMETER), null);
	}

	if (empty($ids)) {
	    return array(null, array());
	}

	GalleryCoreApi::requireOnce(
	    'modules/core/classes/helpers/GalleryDerivativeHelper_simple.class');
	list ($ret, $results) = GalleryDerivativeHelper_simple::_loadDerivatives(
	    $ids, null, DERIVATIVE_TYPE_IMAGE_RESIZE);
	if ($ret) {
	    return array($ret, null);
	}
	return array(null, $results);
    }

    /**
     * @see GalleryCoreApi::fetchPreferredsByItemIds
     */
    function fetchPreferredsByItemIds($ids) {
	if (!is_array($ids)) {
	    return array(GalleryCoreApi::error(ERROR_BAD_PARAMETER), null);
	}

	if (empty($ids)) {
	    return array(null, array());
	}

	GalleryCoreApi::requireOnce(
	    'modules/core/classes/helpers/GalleryDerivativeHelper_simple.class');
	list ($ret, $results) = GalleryDerivativeHelper_simple::_loadDerivatives(
	    $ids, null, DERIVATIVE_TYPE_IMAGE_PREFERRED);
	if ($ret) {
	    return array($ret, null);
	}

	/* Only one preferred per item, so simplify the results */
	foreach ($results as $id => $value) {
	    $results[$id] = $value[0];
	}

	return array(null, $results);
    }
}
?>