class.tslib_mediawizardmanager.php

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<?php
/***************************************************************
 *  Copyright notice
 *
 *  (c) 2010-2011 Ernesto Baschny <ernst@cron-it.de>
 *  All rights reserved
 *
 *  This script is part of the TYPO3 project. The TYPO3 project 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.
 *
 *  The GNU General Public License can be found at
 *  http://www.gnu.org/copyleft/gpl.html.
 *  A copy is found in the textfile GPL.txt and important notices to the license
 *  from the author is found in LICENSE.txt distributed with these scripts.
 *
 *
 *  This script 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.
 *
 *  This copyright notice MUST APPEAR in all copies of the script!
 ***************************************************************/

/**
 * Manager to register and call registered media wizard providers
 *
 * $Id: $

 * @author  Ernesto Baschny <ernst@cron-it.de>
 * @static
 */
class tslib_mediaWizardManager {

    protected static $providers = array();

    /**
     * Allows extensions to register themselves as media wizard providers
     *
     * @param   string  $className A class implementing tslib_mediaWizardProvider
     * @return  void
     */
    public static function registerMediaWizardProvider($className) {
        if (!isset(self::$providers[$className])) {
            $provider = t3lib_div::makeInstance($className);
            if (!($provider instanceof tslib_mediaWizardProvider)) {
                throw new UnexpectedValueException(
                    $className .' is registered as a mediaWizardProvider, so it must implement interface tslib_mediaWizardProvider',
                    1285022360
                );
            }
            self::$providers[$className] = $provider;
        }
    }

    /**
     *
     * @param string $url
     * @return a valid mediaWizardProvider that can handle this URL
     */
    public static function getValidMediaWizardProvider($url) {
            // Go through registered providers in reverse order (last one registered wins)
        $providers = array_reverse(self::$providers, TRUE);
        foreach (self::$providers as $className => $provider) {
            /** @var $provider tslib_mediaWizardProvider */
            if ($provider->canHandle($url)) {
                return $provider;
            }
        }
            // no provider found
        return NULL;
    }

}

if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['tslib/class.tslib_mediawizardmanager.php'])) {
    include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['tslib/class.tslib_mediawizardmanager.php']);
}

?>