/**
  * (non-PHPdoc)
  * @see IActionController::executeAction()
  */
 public function executeAction($parameters)
 {
     $senderId = $this->_websoccer->getUser()->id;
     // check if messages is enabled
     if (!$this->_websoccer->getConfig("messages_enabled")) {
         throw new Exception($this->_i18n->getMessage("messages_err_messagesdisabled"));
     }
     // find user
     $recipientId = UsersDataService::getUserIdByNick($this->_websoccer, $this->_db, $parameters["nick"]);
     if ($recipientId < 1) {
         throw new Exception($this->_i18n->getMessage("messages_send_err_invalidrecipient"));
     }
     // cannot send to yourself
     if ($senderId == $recipientId) {
         throw new Exception($this->_i18n->getMessage("messages_send_err_sendtoyourself"));
     }
     $now = $this->_websoccer->getNowAsTimestamp();
     // check when sent last message (needs x minutes break in order to prevent spam)
     $lastMessage = MessagesDataService::getLastMessageOfUserId($this->_websoccer, $this->_db, $senderId);
     $timebreakBoundary = $now - $this->_websoccer->getConfig("messages_break_minutes") * 60;
     if ($lastMessage != null && $lastMessage["date"] >= $timebreakBoundary) {
         throw new Exception($this->_i18n->getMessage("messages_send_err_timebreak", $this->_websoccer->getConfig("messages_break_minutes")));
     }
     // create message
     $columns["empfaenger_id"] = $recipientId;
     $columns["absender_id"] = $senderId;
     $columns["datum"] = $now;
     $columns["betreff"] = $parameters["subject"];
     $columns["nachricht"] = $parameters["msgcontent"];
     $fromTable = $this->_websoccer->getConfig("db_prefix") . "_briefe";
     // create message in inbox of recipient
     $columns["typ"] = "eingang";
     $this->_db->queryInsert($columns, $fromTable);
     // create message in outbox of sender
     $columns["typ"] = "ausgang";
     $this->_db->queryInsert($columns, $fromTable);
     // success message
     $this->_websoccer->addFrontMessage(new FrontMessage(MESSAGE_TYPE_SUCCESS, $this->_i18n->getMessage("messages_send_success"), ""));
     // clear fields
     $_REQUEST["subject"] = "";
     $_REQUEST["msgcontent"] = "";
     $_REQUEST["nick"] = "";
     return null;
 }