<?php

/**
 * ownCloud
 *
 * @author Frank Karlitschek
 * @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/>.
 *
 */

/**
 * error code for functions not provided by the storage provider
 */
define('OC_USER_BACKEND_NOT_IMPLEMENTED',-501);

/**
 * abstract base class for user management
 */
abstract class OC_USER_BACKEND {

	/**
	 * @brief Create a new user
	 * @param $uid The username of the user to create
	 * @param $password The password of the new user
	 * @returns true/false
	 *
	 * Creates a new user. Basic checking of username is done in OC_USER
	 * itself, not in its subclasses.
	 */
	public function createUser($uid, $password){
		return OC_USER_BACKEND_NOT_IMPLEMENTED;
	}

	/**
	 * @brief delete a user
	 * @param $uid The username of the user to delete
	 * @returns true/false
	 *
	 * Deletes a user
	 */
	public function deleteUser( $uid ){
		return OC_USER_BACKEND_NOT_IMPLEMENTED;
	}

	/**
	 * @brief Set password
	 * @param $uid The username
	 * @param $password The new password
	 * @returns true/false
	 *
	 * Change the password of a user
	 */
	public function setPassword($uid, $password){
		return OC_USER_BACKEND_NOT_IMPLEMENTED;
	}

	/**
	 * @brief Check if the password is correct
	 * @param $uid The username
	 * @param $password The password
	 * @returns true/false
	 *
	 * Check if the password is correct without logging in the user
	 */
	public function checkPassword($uid, $password){
		return OC_USER_BACKEND_NOT_IMPLEMENTED;
	}

	/**
	 * @brief Get a list of all users
	 * @returns array with all uids
	 *
	 * Get a list of all users.
	 */
	public function getUsers(){
		return OC_USER_BACKEND_NOT_IMPLEMENTED;
	}

	/**
	 * @brief check if a user exists
	 * @param string $uid the username
	 * @return boolean
	 */
	public function userExists($uid){
		return OC_USER_BACKEND_NOT_IMPLEMENTED;
	}
}