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<?php

/**

 * SessionComponent. Provides access to Sessions from the Controller layer

 *

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 * @link          http://cakephp.org CakePHP(tm) Project

 * @package       Cake.Controller.Component

 * @since         CakePHP(tm) v 0.10.0.1232

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

App::uses('Component', 'Controller');

App::uses('CakeSession', 'Model/Datasource');

/**

 * The CakePHP SessionComponent provides a way to persist client data between

 * page requests. It acts as a wrapper for the `$_SESSION` as well as providing

 * convenience methods for several `$_SESSION` related functions.

 *

 * @package       Cake.Controller.Component

 * @link http://book.cakephp.org/2.0/en/core-libraries/components/sessions.html

 * @link http://book.cakephp.org/2.0/en/development/sessions.html

 */

class SessionComponent extends Component {

/**

 * Get / Set the userAgent

 *

 * @param string $userAgent Set the userAgent

 * @return void

 */

	public function userAgent($userAgent = null) {

		return CakeSession::userAgent($userAgent);

	}

/**

 * Used to write a value to a session key.

 *

 * In your controller: $this->Session->write('Controller.sessKey', 'session value');

 *

 * @param string $name The name of the key your are setting in the session.

 * 							This should be in a Controller.key format for better organizing

 * @param string $value The value you want to store in a session.

 * @return boolean Success

 * @link http://book.cakephp.org/2.0/en/core-libraries/components/sessions.html#SessionComponent::write

 */

	public function write($name, $value = null) {

		return CakeSession::write($name, $value);

	}

/**

 * Used to read a session values for a key or return values for all keys.

 *

 * In your controller: $this->Session->read('Controller.sessKey');

 * Calling the method without a param will return all session vars

 *

 * @param string $name the name of the session key you want to read

 * @return mixed value from the session vars

 * @link http://book.cakephp.org/2.0/en/core-libraries/components/sessions.html#SessionComponent::read

 */

	public function read($name = null) {

		return CakeSession::read($name);

	}

/**

 * Wrapper for SessionComponent::del();

 *

 * In your controller: $this->Session->delete('Controller.sessKey');

 *

 * @param string $name the name of the session key you want to delete

 * @return boolean true is session variable is set and can be deleted, false is variable was not set.

 * @link http://book.cakephp.org/2.0/en/core-libraries/components/sessions.html#SessionComponent::delete

 */

	public function delete($name) {

		return CakeSession::delete($name);

	}

/**

 * Used to check if a session variable is set

 *

 * In your controller: $this->Session->check('Controller.sessKey');

 *

 * @param string $name the name of the session key you want to check

 * @return boolean true is session variable is set, false if not

 * @link http://book.cakephp.org/2.0/en/core-libraries/components/sessions.html#SessionComponent::check

 */

	public function check($name) {

		return CakeSession::check($name);

	}

/**

 * Used to determine the last error in a session.

 *

 * In your controller: $this->Session->error();

 *

 * @return string Last session error

 */

	public function error() {

		return CakeSession::error();

	}

/**

 * Used to set a session variable that can be used to output messages in the view.

 *

 * In your controller: $this->Session->setFlash('This has been saved');

 *

 * Additional params below can be passed to customize the output, or the Message.[key].

 * You can also set additional parameters when rendering flash messages. See SessionHelper::flash()

 * for more information on how to do that.

 *

 * @param string $message Message to be flashed

 * @param string $element Element to wrap flash message in.

 * @param array $params Parameters to be sent to layout as view variables

 * @param string $key Message key, default is 'flash'

 * @return void

 * @link http://book.cakephp.org/2.0/en/core-libraries/components/sessions.html#creating-notification-messages

 */

	public function setFlash($message, $element = 'default', $params = array(), $key = 'flash') {

		CakeSession::write('Message.' . $key, compact('message', 'element', 'params'));

	}

/**

 * Used to renew a session id

 *

 * In your controller: $this->Session->renew();

 *

 * @return void

 */

	public function renew() {

		return CakeSession::renew();

	}

/**

 * Used to check for a valid session.

 *

 * In your controller: $this->Session->valid();

 *

 * @return boolean true is session is valid, false is session is invalid

 */

	public function valid() {

		return CakeSession::valid();

	}

/**

 * Used to destroy sessions

 *

 * In your controller: $this->Session->destroy();

 *

 * @return void

 * @link http://book.cakephp.org/2.0/en/core-libraries/components/sessions.html#SessionComponent::destroy

 */

	public function destroy() {

		return CakeSession::destroy();

	}

/**

 * Get/Set the session id.

 *

 * When fetching the session id, the session will be started

 * if it has not already been started. When setting the session id,

 * the session will not be started.

 *

 * @param string $id Id to use (optional)

 * @return string The current session id.

 */

	public function id($id = null) {

		if (empty($id)) {

			CakeSession::start();

		}

		return CakeSession::id($id);

	}

/**

 * Returns a bool, whether or not the session has been started.

 *

 * @return boolean

 */

	public function started() {

		return CakeSession::started();

	}

}