<?php
  /**
   * Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
  
  namespace OC\Session;
  
  /**
   * Class Internal
   *
   * wrap php's internal session handling into the Session interface
   *
   * @package OC\Session
   */
  class Internal extends Memory {
  	public function __construct($name) {
  		session_name($name);
  		session_start();
  		if (!isset($_SESSION)) {
  			throw new \Exception('Failed to start session');
  		}
  		$this->data = $_SESSION;
  	}
  
  	public function __destruct() {

  		$this->close();

  	}

  	/**
  	 * @param string $key
  	 */
  	public function remove($key) {
  		// also remove it from $_SESSION to prevent re-setting the old value during the merge
  		if (isset($_SESSION[$key])) {
  			unset($_SESSION[$key]);
  		}
  		parent::remove($key);
  	}

  	public function clear() {
  		session_unset();
  		@session_regenerate_id(true);
  		@session_start();
  		$this->data = $_SESSION = array();
  	}

  
  	public function close() {
  		$_SESSION = array_merge($_SESSION, $this->data);
  		session_write_close();
  
  		parent::close();
  	}
  
      public function reopen() {
          throw new \Exception('The session cannot be reopened - reopen() is ony to be used in unit testing.');
      }

  }