/**
  * returns message prepared for json transport
  * - overwriten to convert recipients to array
  *
  * @param Tinebase_Record_Interface $_record
  * @return array record data
  */
 protected function _recordToJson($_record)
 {
     if ($_record instanceof Felamimail_Model_Message) {
         foreach (array('to', 'cc', 'bcc') as $type) {
             if (!is_array($_record->{$type})) {
                 if (!empty($_record->{$type})) {
                     $exploded = explode(',', $_record->{$type});
                     $_record->{$type} = $exploded;
                 } else {
                     $_record->{$type} = array();
                 }
             }
         }
         if ($_record->preparedParts instanceof Tinebase_Record_RecordSet) {
             foreach ($_record->preparedParts as $preparedPart) {
                 if ($preparedPart->preparedData instanceof Calendar_Model_iMIP) {
                     try {
                         $iMIPFrontend = new Calendar_Frontend_iMIP();
                         $iMIPFrontend->prepareComponent($preparedPart->preparedData, true);
                     } catch (Exception $e) {
                         Tinebase_Core::getLogger()->warn(__METHOD__ . '::' . __LINE__ . ' Could not prepare calendar iMIP component: ' . $e->getMessage());
                         if (Tinebase_Core::isLogLevel(Zend_Log::DEBUG)) {
                             Tinebase_Core::getLogger()->debug(__METHOD__ . '::' . __LINE__ . ' ' . $e->getTraceAsString());
                         }
                         $_record->preparedParts->removeRecord($preparedPart);
                     }
                 }
             }
         }
     } else {
         if ($_record instanceof Felamimail_Model_Account) {
             // add usernames
             $_record->resolveCredentials();
             // imap
             $_record->resolveCredentials(TRUE, FALSE, TRUE);
             // smtp
         } else {
             if ($_record instanceof Felamimail_Model_Sieve_Vacation) {
                 if (!$_record->mime) {
                     $_record->reason = Tinebase_Mail::convertFromTextToHTML($_record->reason, 'felamimail-body-blockquote');
                 }
             }
         }
     }
     return parent::_recordToJson($_record);
 }