<?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/>.
 *
 */


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

	/**
	 * Try to create a new user
	 *
	 * @param  string  $username  The username of the user to create
	 * @param  string  $password  The password of the new user
	 */
	abstract public static function createUser($username, $password);

	/**
	 * Try to login a user
	 *
	 * @param  string  $username  The username of the user to log in
	 * @param  string  $password  The password of the user
	 */
	abstract public static function login($username, $password);

	/**
	 * Check if some user is logged in
	 *
	 */
	abstract public static function isLoggedIn();

	/**
	 * Generate a random password
	 */
	abstract public static function generatePassword();

	/**
	 * Set the password of a user
	 *
	 * @param  string  $username  User who password will be changed
	 * @param  string  $password  The new password for the user
	 */
	abstract public static function setPassword($username, $password);

	/**
	 * Check if the password of the user is correct
	 *
	 * @param  string  $username  Name of the user
	 * @param  string  $password  Password of the user
	 */
	abstract public static function checkPassword($username, $password);


	/**
	 * get a list of all users
	 *
	 */
	abstract public static function getUsers();
}