Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\Session;
Chris@0: 
Chris@0: /**
Chris@0:  * Wraps another SessionHandlerInterface to prevent writes when not allowed.
Chris@0:  */
Chris@0: class WriteSafeSessionHandler implements \SessionHandlerInterface, WriteSafeSessionHandlerInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * @var \SessionHandlerInterface
Chris@0:    */
Chris@0:   protected $wrappedSessionHandler;
Chris@0: 
Chris@0:   /**
Chris@0:    * Whether or not the session is enabled for writing.
Chris@0:    *
Chris@0:    * @var bool
Chris@0:    */
Chris@0:   protected $sessionWritable;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a new write safe session handler.
Chris@0:    *
Chris@0:    * @param \SessionHandlerInterface $wrapped_session_handler
Chris@0:    *   The underlying session handler.
Chris@0:    * @param bool $session_writable
Chris@0:    *   Whether or not the session should be initially writable.
Chris@0:    */
Chris@0:   public function __construct(\SessionHandlerInterface $wrapped_session_handler, $session_writable = TRUE) {
Chris@0:     $this->wrappedSessionHandler = $wrapped_session_handler;
Chris@0:     $this->sessionWritable = $session_writable;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function close() {
Chris@0:     return $this->wrappedSessionHandler->close();
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function destroy($session_id) {
Chris@0:     return $this->wrappedSessionHandler->destroy($session_id);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function gc($max_lifetime) {
Chris@0:     return $this->wrappedSessionHandler->gc($max_lifetime);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function open($save_path, $session_id) {
Chris@0:     return $this->wrappedSessionHandler->open($save_path, $session_id);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function read($session_id) {
Chris@0:     return $this->wrappedSessionHandler->read($session_id);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function write($session_id, $session_data) {
Chris@0:     if ($this->isSessionWritable()) {
Chris@0:       return $this->wrappedSessionHandler->write($session_id, $session_data);
Chris@0:     }
Chris@0:     else {
Chris@0:       return TRUE;
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function setSessionWritable($flag) {
Chris@0:     $this->sessionWritable = (bool) $flag;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function isSessionWritable() {
Chris@0:     return $this->sessionWritable;
Chris@0:   }
Chris@0: 
Chris@0: }