<?php
  
  /**
   * ownCloud
   *
   * @author Frank Karlitschek
   * @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/>.
   *
   */
  
  /**
   * dummy user backend, does not keep state, only for testing use
   */
  class OC_User_Dummy extends OC_User_Backend {
  	private $users = array();
  
  	/**
  	 * @brief Create a new user
  	 * @param string $uid The username of the user to create
  	 * @param string $password The password of the new user
  	 * @return bool
  	 *
  	 * Creates a new user. Basic checking of username is done in OC_User
  	 * itself, not in its subclasses.
  	 */
  	public function createUser($uid, $password) {
  		if (isset($this->users[$uid])) {
  			return false;
  		} else {
  			$this->users[$uid] = $password;
  			return true;
  		}
  	}
  
  	/**
  	 * @brief delete a user
  	 * @param string $uid The username of the user to delete
  	 * @return bool
  	 *
  	 * Deletes a user
  	 */
  	public function deleteUser($uid) {
  		if (isset($this->users[$uid])) {
  			unset($this->users[$uid]);
  			return true;
  		} else {
  			return false;
  		}
  	}
  
  	/**
  	 * @brief Set password
  	 * @param string $uid The username
  	 * @param string $password The new password
  	 * @return bool
  	 *
  	 * Change the password of a user
  	 */
  	public function setPassword($uid, $password) {
  		if (isset($this->users[$uid])) {
  			$this->users[$uid] = $password;
  			return true;
  		} else {
  			return false;
  		}
  	}
  
  	/**
  	 * @brief Check if the password is correct
  	 * @param string $uid The username
  	 * @param string $password The password
  	 * @return string
  	 *
  	 * Check if the password is correct without logging in the user
  	 * returns the user id or false
  	 */
  	public function checkPassword($uid, $password) {
  		if (isset($this->users[$uid]) && $this->users[$uid] === $password) {
  			return $uid;
  		} else {
  			return false;
  		}
  	}
  
  	/**
  	 * @brief Get a list of all users
  	 * @param string $search
  	 * @param int $limit
  	 * @param int $offset
  	 * @return array with all uids
  	 *
  	 * Get a list of all users.
  	 */
  	public function getUsers($search = '', $limit = null, $offset = null) {
  		return array_keys($this->users);
  	}
  
  	/**
  	 * @brief check if a user exists
  	 * @param string $uid the username
  	 * @return boolean
  	 */
  	public function userExists($uid) {
  		return isset($this->users[$uid]);
  	}
  
  	/**
  	 * @return bool
  	 */
  	public function hasUserListings() {
  		return true;
  	}

  
  	/**
  	 * counts the users in the database
  	 *
  	 * @return int | bool
  	 */
  	public function countUsers() {
  		return 0;
  	}

  }