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<?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[$uid])) {
			return ($this->users[$uid] == $password);
		} 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;
	}
}