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   1  <?php
   2  /*
   3   * Limb PHP Framework
   4   *
   5   * @link http://limb-project.com 
   6   * @copyright  Copyright &copy; 2004-2007 BIT(http://bit-creative.com)
   7   * @license    LGPL http://www.gnu.org/copyleft/lesser.html 
   8   */
   9  lmb_require('limb/filter_chain/src/lmbInterceptingFilter.interface.php');
  10  lmb_require('limb/session/src/lmbSession.class.php');
  11  
  12  
  13  /**

  14   * Tells lmbSessionStartupFilter filter to use either native (file based) session storage driver (default) or database session storage driver

  15   * @see lmbSessionStartupFilter

  16   */
  17  @define('LIMB_SESSION_USE_DB_DRIVER', false);
  18  
  19  /**

  20   * lmbSessionStartupFilter installs session storage driver and starts session.

  21   *

  22   * What session storage driver will be used is depend on {@link LIMB_USE_DB_DRIVER} constant value.

  23   * If LIMB_USE_DB_DRIVER has FALSE value or not defined - native file based session storage will be used.

  24   * Otherwise database storage driver will be installed.

  25   * @see lmbSessionNativeStorage

  26   * @see lmbSessionDbStorage

  27   *

  28   * @version $Id: lmbSessionStartupFilter.class.php 5945 2007-06-06 08:31:43Z pachanga $

  29   * @package web_app
  30   */
  31  class lmbSessionStartupFilter implements lmbInterceptingFilter
  32  {
  33    /**

  34     * @see lmbInterceptingFilter :: run()

  35     * @uses LIMB_SESSION_USE_DB_DRIVER

  36     */
  37    function run($filter_chain)
  38    {
  39      if(constant('LIMB_SESSION_USE_DB_DRIVER'))
  40        $storage =  $this->_createDBSessionStorage();
  41      else
  42        $storage =  $this->_createNativeSessionStorage();
  43  
  44      $session = lmbToolkit :: instance()->getSession();
  45      $session->start($storage);
  46  
  47      $filter_chain->next();
  48    }
  49  
  50    protected function _createNativeSessionStorage()
  51    {
  52      lmb_require('limb/session/src/lmbSessionNativeStorage.class.php');
  53      return new lmbSessionNativeStorage();
  54    }
  55  
  56    /**

  57     * Creates object of {@link lmbSessionDbStorage} class.

  58     * If constant LIMB_SESSION_DB_MAX_LIFE_TIME is defined passed it's value as session max life time

  59     * @see lmbInterceptingFilter :: run()

  60     * @uses LIMB_SESSION_DB_MAX_LIFE_TIME

  61     */
  62    protected function _createDBSessionStorage()
  63    {
  64      if(defined('LIMB_SESSION_DB_MAX_LIFE_TIME') &&  constant('LIMB_SESSION_DB_MAX_LIFE_TIME'))
  65        $max_life_time = constant('LIMB_SESSION_DB_MAX_LIFE_TIME');
  66      else
  67        $max_life_time = null;
  68  
  69      lmb_require('limb/session/src/lmbSessionDbStorage.class.php');
  70      $db_connection = lmbToolkit :: instance()->getDefaultDbConnection();
  71      return new lmbSessionDbStorage($db_connection, $max_life_time);
  72    }
  73  }
  74  ?>