/**
  * Check if given tid is valid.
  *
  * @param  int $tid
  * @return bool
  */
 private function checkTextureExist($tid)
 {
     return !Texture::where('tid', $tid)->isEmpty();
 }
 public function delete(Request $request)
 {
     $result = Texture::find($request->tid);
     if (!$result) {
         return json(trans('skinlib.non-existent'), 1);
     }
     if ($result->uploader != $this->user->uid && !$this->user->isAdmin()) {
         return json(trans('skinlib.no-permission'), 1);
     }
     // check if file occupied
     if (Texture::where('hash', $result['hash'])->count() == 1) {
         Storage::delete($result['hash']);
     }
     if (option('return_score')) {
         $this->user->setScore($result->size * Option::get('score_per_storage'), 'plus');
     }
     if ($result->delete()) {
         return json(trans('skinlib.delete.success'), 0);
     }
 }