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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Session
 *
 * @copyright   Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
* WINCACHE session storage handler for PHP
*
* @package     Joomla.Platform
* @subpackage  Session
* @since       11.1
* @see http://www.php.net/manual/en/function.session-set-save-handler.php
*/
class JSessionStorageWincache extends JSessionStorage
{
	/**
	* Constructor
	*
	* @param   array  $options optional parameters
	*/
	public function __construct( $options = array() )
	{
		if (!$this->test()) {
			return JError::raiseError(404, JText::_('JLIB_SESSION_WINCACHE_EXTENSION_NOT_AVAILABLE'));
		}

parent::__construct($options);
	}

/**
	 * Open the SessionHandler backend.
	 *
	 * @param   string  $save_path     The path to the session object.
	 * @param   string  $session_name  The name of the session.
	 *
	 * @return boolean  True on success, false otherwise.
	 */
	public function open($save_path, $session_name)
	{
		return true;
	}

/**
	 * Close the SessionHandler backend.
	 *
	 * @return boolean  True on success, false otherwise.
	 */
	public function close()
	{
		return true;
	}

/**
 	 * Read the data for a particular session identifier from the
 	 * SessionHandler backend.
 	 *
 	 * @param   string   $id  The session identifier.
 	 *
 	 * @return  string    The session data.
 	 */
	public function read($id)
	{
		$sess_id = 'sess_'.$id;
		return (string) wincache_ucache_get($sess_id);
	}

/**
	 * Write session data to the SessionHandler backend.
	 *
	 * @param   string   $id            The session identifier.
	 * @param   string   $session_data  The session data.
	 *
	 * @return boolean  True on success, false otherwise.
	 */
	public function write($id, $session_data)
	{
		$sess_id = 'sess_'.$id;
		return wincache_ucache_set($sess_id, $session_data, ini_get("session.gc_maxlifetime"));
	}

/**
	  * Destroy the data for a particular session identifier in the
	  * SessionHandler backend.
	  *
	  * @param   string   $id  The session identifier.
	  *
	  * @return boolean  True on success, false otherwise.
	  */
	public function destroy($id)
	{
		$sess_id = 'sess_'.$id;
		return wincache_ucache_delete($sess_id);
	}

/**
	 * Garbage collect stale sessions from the SessionHandler backend.
	 *
	 * @param   integer  $maxlifetime  The maximum age of a session.
	 *
	 * @return boolean  True on success, false otherwise.
	 */
	public function gc($maxlifetime = null)
	{
		return true;
	}

/**
	 * Test to see if the SessionHandler is available.
	 *
	 * @return boolean  True on success, false otherwise.
	 */
	static public function test() {
		return (extension_loaded('wincache') && function_exists('wincache_ucache_get') && !strcmp(ini_get('wincache.ucenabled'), "1"));
	}
}