/**
  * Check if all the files are finished upload
  * If yes return XML drop folder file instance
  * otherwise return false
  * @param DropFolderFile $file
  */
 private function getXmlFileIfReadyForProcessing(DropFolderFile $file)
 {
     KalturaLog::debug('Check if file [' . $file->getId() . '] ready for processing ');
     if (!$file->getLeadDropFolderFileId()) {
         KalturaLog::debug('The XML file is not uploaded yet - changing status to WAITING');
         return false;
     }
     $statuses = array(DropFolderFileStatus::PARSED, DropFolderFileStatus::UPLOADING, DropFolderFileStatus::DETECTED);
     $nonReadyFiles = DropFolderFilePeer::retrieveByLeadIdAndStatuses($file->getLeadDropFolderFileId(), $statuses);
     if ($nonReadyFiles && count($nonReadyFiles) > 0) {
         KalturaLog::debug('Not all the files finished uploading - changing status to WAITING');
         return false;
     }
     $xmlFile = null;
     if ($file->getId() == $file->getLeadDropFolderFileId()) {
         $xmlFile = $file;
     } else {
         $xmlFile = DropFolderFilePeer::retrieveByPK($file->getLeadDropFolderFileId());
     }
     return $xmlFile;
 }