<?php
/**
 * ownCloud
 *
 * @author Robin Appelman
 * @copyright 2010 Frank Karlitschek karlitschek@kde.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 provides the functionality needed to install, update and remove plugins/apps
 */
class OC_INSTALLER{
	/**
	 * @brief Installs an app
	 * @param $data array with all information
	 * @returns integer
	 *
	 * This function installs an app. All information needed are passed in the
	 * associative array $data.
	 * The following keys are required:
	 *   - source: string, can be "path" or "http"
	 *
	 * One of the following keys is required:
	 *   - path: path to the file containing the app
	 *   - href: link to the downloadable file containing the app
	 *
	 * The following keys are optional:
	 *   - pretend: boolean, if set true the system won't do anything
	 *   - noinstall: boolean, if true appinfo/install.php won't be loaded
	 *   - inactive: boolean, if set true the appconfig/app.sample.php won't be
	 *     renamed
	 *
	 * This function works as follows
	 *   -# fetching the file
	 *   -# unzipping it
	 *   -# including appinfo/install.php
	 *   -# setting the installed version
	 *
	 * It is the task of oc_app_install to create the tables and do whatever is
	 * needed to get the app working.
	 */
	public static function installApp( $data = array()){
		// TODO: write function
		return true;
	}

	/**
	 * @brief Update an application
	 * @param $data array with all information
	 * @returns integer
	 *
	 * This function installs an app. All information needed are passed in the
	 * associative array $data.
	 * The following keys are required:
	 *   - source: string, can be "path" or "http"
	 *
	 * One of the following keys is required:
	 *   - path: path to the file containing the app
	 *   - href: link to the downloadable file containing the app
	 *
	 * The following keys are optional:
	 *   - pretend: boolean, if set true the system won't do anything
	 *   - noupgrade: boolean, if true appinfo/upgrade.php won't be loaded
	 *
	 * This function works as follows
	 *   -# fetching the file
	 *   -# removing the old files
	 *   -# unzipping new file
	 *   -# including appinfo/upgrade.php
	 *   -# setting the installed version
	 *
	 * upgrade.php can determine the current installed version of the app using "OC_APPCONFIG::getValue($appid,'installed_version')"
	 */
	public static function upgradeApp( $data = array()){
		// TODO: write function
		return true;
	}

	/**
	 * @brief Removes an app
	 * @param $name name of the application to remove
	 * @param $options array with options
	 * @returns true/false
	 *
	 * This function removes an app. $options is an associative array. The
	 * following keys are optional:ja
	 *   - keeppreferences: boolean, if true the user preferences won't be deleted
	 *   - keepappconfig: boolean, if true the config will be kept
	 *   - keeptables: boolean, if true the database will be kept
	 *   - keepfiles: boolean, if true the user files will be kept
	 *
	 * This function works as follows
	 *   -# including appinfo/remove.php
	 *   -# removing the files
	 *
	 * The function will not delete preferences, tables and the configuration,
	 * this has to be done by the function oc_app_uninstall().
	 */
	public static function removeApp( $name, $options = array()){
		// TODO: write function
		return true;
	}
}