<?php
/**
 * A generic class for handling guests
 *
 * @author		Roland Haeder <webmaster@ship-simu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 Core Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.ship-simu.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
class Guest extends BaseUser implements ManageableGuest, Registerable {
	// Exceptions
	const EXCEPTION_USERNAME_NOT_FOUND   = 0x170;
	const EXCEPTION_USER_EMAIL_NOT_FOUND = 0x171;
	const EXCEPTION_USER_PASS_MISMATCH   = 0x172;

	/**
	 * Protected constructor
	 *
	 * @return	void
	 */
	protected function __construct () {
		// Call parent constructor
		parent::__construct(__CLASS__);
	}

	/**
	 * Creates an instance of this user class by a provided username. This
	 * factory method will check if username is already taken and if not so it
	 * will throw an exception.
	 *
	 * @param	$userName		Username we need a class instance for
	 * @return	$userInstance	An instance of this user class
	 * @throws	UsernameMissingException	If the username does not exist
	 */
	public final static function createGuestByUsername ($userName) {
		// Get a new instance
		$userInstance = new Guest();

		// Set the username
		$userInstance->setUserName($userName);

		// Check if username exists
		if ($userInstance->ifUsernameExists() === false) {
			// Throw an exception here
			throw new UsernameMissingException(array($userInstance, $userName), self::EXCEPTION_USERNAME_NOT_FOUND);
		} // END - if

		// Return the instance
		return $userInstance;
	}

	/**
	 * Creates an instance of this user class by a provided email address. This
	 * factory method will not check if email address is there.
	 *
	 * @param	$email			Email address of the user
	 * @return	$userInstance	An instance of this user class
	 */
	public final static function createGuestByEmail ($email) {
		// Get a new instance
		$userInstance = new Guest();

		// Set the username
		$userInstance->setEmail($email);

		// Return the instance
		return $userInstance;
	}

	/**
	 * Updates the last activity timestamp and last performed action in the
	 * database result. You should call flushPendingUpdates() to flush these updates
	 * to the database layer.
	 *
	 * @param	$requestInstance	A requestable class instance
	 * @return	void
	 */
	public function updateLastActivity (Requestable $requestInstance) {
		// No activity will be logged for guest accounts
	}

	/**
	 * Flushs all pending updates to the database layer
	 *
	 * @return	void
	 */
	public function flushPendingUpdates () {
		// No updates will be flushed to database!
	}
}

// [EOF]
?>