/**
  * @see	\wcf\form\IPage::readParameters()
  */
 public function readParameters()
 {
     parent::readParameters();
     if (isset($_REQUEST['id'])) {
         $this->conversationID = intval($_REQUEST['id']);
     }
     $this->conversation = Conversation::getUserConversation($this->conversationID, WCF::getUser()->userID);
     if ($this->conversation === null) {
         throw new IllegalLinkException();
     }
     if (!$this->conversation->canRead() || $this->conversation->isClosed) {
         throw new PermissionDeniedException();
     }
     // quotes
     MessageQuoteManager::getInstance()->readParameters();
 }