/**
  * Add attachement file
  *
  * @param object $product
  * @param array $data
  * @param array $locales
  *
  * @return object|null Attachement
  */
 public function processAddAttachment($product, $data, $locales)
 {
     $attachment = null;
     $file = $data['file'];
     if (!empty($file)) {
         $fileName = sha1(microtime());
         $attachment = new \AttachmentCore();
         foreach ($locales as $locale) {
             $attachment->name[(int) $locale['id_lang']] = $data['name'];
             $attachment->description[(int) $locale['id_lang']] = $data['description'];
         }
         $attachment->file = $fileName;
         $attachment->mime = $file->getMimeType();
         $attachment->file_name = $file->getClientOriginalName();
         $file->move(_PS_DOWNLOAD_DIR_, $fileName);
         if ($attachment->add()) {
             $attachment->attachProduct($product->id);
         }
     }
     return $attachment;
 }