public function deleteFile($fileId)
 {
     $this->load->helper('file');
     $fileDataObj = new Document_Model($fileId);
     $userPermObj = new User_Perms_Model($this->session->id);
     // all ok, proceed!
     if (!is_dir($this->config->item('archiveDir'))) {
         // Make sure directory is writeable
         if (!mkdir($this->config->item('archiveDir'), 0775)) {
             $error = array('status' => 'error', 'msg' => 'We could not create the Archive Directory');
             return json_encode($error);
             exit;
         }
     }
     if ($userPermObj->canAdmin($fileId)) {
         $location = $fileDataObj->getLocation();
         $baseName = $fileDataObj->getBaseName();
         $ext = $fileDataObj->getExt();
         $fileDataObj->temp_delete();
         $fileContent = file_get_contents($this->config->item('dataDir') . $location);
         if (!write_file($this->config->item('archiveDir') . $location, $fileContent)) {
             $error = array('status' => 'error', 'msg' => 'Unable to create the archived file.');
             return json_encode($error);
             exit;
         } else {
             unlink($this->config->item('dataDir') . $location);
         }
     } else {
         $error = array('status' => 'error', 'msg' => 'You do not have admin priviledges for this file.');
         return json_encode($error);
         exit;
     }
     AccessLog_model::addLogEntry($fileId, 'X');
     $msg = array('status' => 'success', 'msg' => 'File was successfully archived');
     return json_encode($msg);
 }