public function updateSequence($event)
 {
     $type_id = $this->owner->getPrimaryKey();
     $hashes = Yii::$app->request->post('fp_hash');
     foreach ($hashes as $hash) {
         // fetch one record to determine `type` of upload
         $uploadExample = Uploads::find()->select(['type'])->where(['hash' => $hash])->one();
         if (count($uploadExample) > 0) {
             $type = $uploadExample->getAttribute('type');
             $acl = VariationHelper::getAclOfType($type);
             if (AccessControl::checkAccess($acl, $type_id)) {
                 // all right, attach uploads
                 Uploads::updateAll(['type_id' => $type_id], 'hash=:hash', [':hash' => $hash]);
             } else {
                 // no access, delete uploaded files
                 Uploads::deleteAll('hash=:hash', [':hash' => $hash]);
             }
         }
     }
     $this->updateFileIdInOwnerModel($event);
 }
 private function fetchFiles($files, &$images, $name = 'file')
 {
     $errors = [];
     $type = Yii::$app->request->post('type');
     $type_id = Yii::$app->request->post('type_id');
     $hash = Yii::$app->request->post('hash');
     // Check access. if `$type_id` is null, then access check must be only in ConnectFileSequence behaviour
     if (!is_null($type_id)) {
         $acl = VariationHelper::getAclOfType($type);
         if (!AccessControl::checkAccess($acl, $type_id)) {
             Yii::warning('Someone trying to upload file with no access.', 'file-processor');
             return ['You have no access to perform this upload'];
         }
     }
     if (isset($files['tmp_name'])) {
         $file_temp_name = $files['tmp_name'];
         $file_real_name = basename($files['name']);
         if (is_uploaded_file($file_temp_name)) {
             $mime = FileHelper::getMimeType($file_temp_name);
             if (is_null($mime)) {
                 $mime = FileHelper::getMimeTypeByExtension($file_real_name);
             }
             if (strpos($mime, 'image') !== false) {
                 $file_dimensions = getimagesize($file_temp_name);
             } else {
                 $file_dimensions = [null, null];
             }
             // insert into db
             $model = new Uploads();
             $model->type = $type;
             $model->type_id = $type_id;
             $model->hash = $hash;
             $model->ord = Uploads::getMaxOrderValue($type, $type_id, $hash) + 1;
             $model->filename = Uploads::generateBaseFileName($file_real_name);
             $model->original = $file_real_name;
             $model->mime = $mime;
             $model->size = filesize($file_temp_name);
             $model->width = $file_dimensions[0];
             $model->height = $file_dimensions[1];
             // save model, save file and fill response array
             if ($model->save()) {
                 // load configuration
                 $config = VariationHelper::getConfigOfType($model->type);
                 $errors = array_merge($errors, $model->process($file_temp_name, $config));
                 // insert id of uploaded file into attribute in model (if needed)
                 Uploads::updateConnectedModelAttribute($config, $model->type_id, $model->id);
                 if (empty($errors)) {
                     $images[$name] = ['width' => $model->width, 'height' => $model->height, 'mime' => $model->mime, 'size' => $model->size, 'id' => $model->id, 'type' => $model->type, 'type_id' => $model->type_id, 'hash' => $model->hash, 'errors' => null];
                 } else {
                     $model->removeFile();
                 }
             } else {
                 Yii::warning('file was unable to be saved. Errors: ' . VarDumper::dumpAsString($model->getErrors()), 'file-processor');
                 array_push($errors, 'File was unable to be saved.');
             }
         } else {
             array_push($errors, 'File was unable to be uploaded.');
         }
     } else {
         foreach ($files as $name => $file) {
             $errors = array_merge($errors, $this->fetchFiles($file, $images, $name));
         }
     }
     return $errors;
 }