/**
  * загрузка файла с данными
  * @return type
  */
 public function actionUpload()
 {
     $model = new UploadForm();
     if (Yii::$app->request->isPost) {
         $model->file = UploadedFile::getInstance($model, 'file');
         if (!$model->file || !in_array($model->file->extension, ['xls', 'ods'])) {
             return $this->render('upload', ['model' => $model]);
         }
         $datetime = new \DateTime();
         $filename = $datetime->format('Y_m_d_H_i_s') . '.' . $model->file->extension;
         if ($model->validate() && $model->file->saveAs('/tmp/' . $filename)) {
             $result = Functions::loadData('/tmp/' . $filename, $model->talon);
             if (is_int($result)) {
                 $model->file->saveAs('../uploads/' . $filename);
                 unlink('/tmp/' . $filename);
                 $this->redirect(['//firms/view', 'id' => $result]);
             } else {
                 unlink('/tmp/' . $filename);
                 $model->addError('file', $result);
             }
         }
     }
     return $this->render('upload', ['model' => $model]);
 }