app.php

<?php
/**
 * ownCloud
 *
 * @author Frank Karlitschek
 * @author Jakob Sack
 * @copyright 2012 Frank Karlitschek frank@owncloud.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library 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 AFFERO GENERAL PUBLIC LICENSE for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

/**
 * This class manages the apps. It allows them to register and integrate in the
 * owncloud ecosystem. Furthermore, this class is responsible for installing,
 * upgrading and removing apps.
 */
class OC_App{
	static private $activeapp = '';
	static private $navigation = array();
	static private $settingsForms = array();
	static private $adminForms = array();
	static private $personalForms = array();
	static private $appInfo = array();
	static private $appTypes = array();
	static private $loadedApps = array();
	static private $checkedApps = array();

	/**
	 * @brief loads all apps
	 * @param array $types
	 * @return bool
	 *
	 * This function walks through the owncloud directory and loads all apps
	 * it can find. A directory contains an app if the file /appinfo/app.php
	 * exists.
	 *
	 * if $types is set, only apps of those types will be loaded
	 */
	public static function loadApps($types=null) {
		// Load the enabled apps here
		$apps = self::getEnabledApps();
		// prevent app.php from printing output
		ob_start();
		foreach( $apps as $app ) {
			if((is_null($types) or self::isType($app, $types)) && !in_array($app, self::$loadedApps)) {
				self::loadApp($app);
				self::$loadedApps[] = $app;
			}
		}
		ob_end_clean();

		if (!defined('DEBUG') || !DEBUG) {
			if (is_null($types)
			    && empty(OC_Util::$core_scripts) 
			    && empty(OC_Util::$core_styles)) {
				OC_Util::$core_scripts = OC_Util::$scripts;
				OC_Util::$scripts = array();
				OC_Util::$core_styles = OC_Util::$styles;