session_manager.inc

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<?php
/**************************************************************
 
 Copyright (c) 2010 Sonjara, Inc
 
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 obtaining a copy of this software and associated documentation
 files (the "Software"), to deal in the Software without
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 Software is furnished to do so, subject to the following
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 included in all copies or substantial portions of the Software.
 
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 copyright holders shall not be used in advertising or otherwise 
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 without prior written authorization.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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*****************************************************************/
 
Fakoli::using("settings", "session_persistance");
 
class SessionManager
{
     static $lifeTime;
     static $hash;
     
     static function createDefaultSettings()
     {
          Settings::setDefaultValue("session_persistance", "enable_database_persistance", "", "Boolean");
     }
     
     static function onInitialize()
     {
          if (!Settings::getValue("session_persistance", "enable_database_persistance")) return;
          
          SessionManager::$lifeTime = get_cfg_var("session.gc_maxlifetime");
          SessionManager::$hash = "";
          
          session_set_save_handler(
             array(SessionManager, "open"), 
             array(SessionManager, "close"),
             array(SessionManager, "read"),
             array(SessionManager, "write"),
             array(SessionManager, "destroy"),
             array(SessionManager, "gc")
           );
           
        register_shutdown_function(session_write_close);
     }
     
     static function open($save_path, $session_name)
     {
          return true;
     }
     
     static function close()
     {
          return true;
     }
     
     static function read($id)
     {
          trace("Session Read $id", 3);
          
          try
          {
               $session = PHPSession::read($id);
               if ($session->expires < time()) return null;
               return $session->data;
          }
          catch(Exception $e)
          {
               return null;
          }
     }
     
     static function write($id, $data)
     {
          trace("Session Write $id", 3);
          
          try
          {              
               $session = PHPSession::read($id);
               if (!$session) $session = new PHPSession();
     
               $expiry = time() + SessionManager::$lifeTime;
               
               if ($session->session_id && ($data == $session->data))
               {
                    $session->filter = new ExclusionFilter("data", "id");
               }
               else
               {
                    $session->filter = null;
               }
               
               $session->id = $id;
               $session->data = $data;
               $session->expires = $expiry;
               $session->save();
          }
          catch(Exception $e)
          {
          }
          
     }
     
     static function destroy($id)
     {
          trace("Session Destroy $id", 3);
          
          try
          {
               $session = PHPSession::read($id);
               if ($session) $session->delete();
          }
          catch(Exception $e)
          {
          }
     }
     
     static function gc()
     {
          $session = new PHPSession();
          $session->delete("WHERE expires < ".time());
     }
     
     static function upgradeComponent($version)
     {
          $mgr = new SessionPersistenceUpgradeManager();
          $mgr->upgrade($version);
     }    
}?>