public function GetNew($ConversationID, $LastMessageID = NULL)
 {
     $this->RecipientData = $this->ConversationModel->GetRecipients($ConversationID);
     $this->SetData('Recipients', $this->RecipientData);
     // Check permissions on the recipients.
     $InConversation = FALSE;
     foreach ($this->RecipientData->Result() as $Recipient) {
         if ($Recipient->UserID == Gdn::Session()->UserID) {
             $InConversation = TRUE;
             break;
         }
     }
     if (!$InConversation) {
         // Conversation moderation must be enabled and they must have permission
         if (!C('Conversations.Moderation.Allow', FALSE)) {
             throw PermissionException();
         }
         $this->Permission('Conversations.Moderation.Manage');
     }
     $this->Conversation = $this->ConversationModel->GetID($ConversationID);
     $this->SetData('Conversation', $this->Conversation);
     // Bad conversation? Redirect
     if ($this->Conversation === FALSE) {
         throw NotFoundException('Conversation');
     }
     $Where = array();
     if ($LastMessageID) {
         if (strpos($LastMessageID, '_') !== FALSE) {
             $LastMessageID = array_pop(explode('_', $LastMessageID));
         }
         $Where['MessageID >='] = $LastMessageID;
     }
     // Fetch message data
     $this->SetData('MessageData', $this->ConversationMessageModel->Get($ConversationID, Gdn::Session()->UserID, 0, 50, $Where), TRUE);
     $this->Render('Messages');
 }