public static function DropzoneJs::valueCallback in DropzoneJS 8

Same name and namespace in other branches

1. 8.2 src/Element/DropzoneJs.php \Drupal\dropzonejs\Element\DropzoneJs::valueCallback()

Determines how user input is mapped to an element's #value property.

Parameters

array $element: An associative array containing the properties of the element.

mixed $input: The incoming input to populate the form element. If this is FALSE, the element's default value should be returned.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.

Return value

mixed The value to assign to the element.

Overrides FormElement::valueCallback

File

src/Element/DropzoneJs.php, line 162

Class

DropzoneJs

Provides a DropzoneJS atop of the file element.

Namespace

Drupal\dropzonejs\Element

Code

public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
  $return['uploaded_files'] = [];
  if ($input !== FALSE) {
    $user_input = NestedArray::getValue($form_state
      ->getUserInput(), $element['#parents'] + [
      'uploaded_files',
    ]);
    if (!empty($user_input['uploaded_files'])) {
      $file_names = array_filter(explode(';', $user_input['uploaded_files']));
      $tmp_upload_scheme = \Drupal::configFactory()
        ->get('dropzonejs.settings')
        ->get('tmp_upload_scheme');
      foreach ($file_names as $name) {

        // The upload handler appended the txt extension to the file for
        // security reasons. We will remove it in this callback.
        $old_filepath = $tmp_upload_scheme . '://' . $name;

        // The upload handler appended the txt extension to the file for
        // security reasons. Because here we know the acceptable extensions
        // we can remove that extension and sanitize the filename.
        $name = self::fixTmpFilename($name);
        $name = file_munge_filename($name, self::getValidExtensions($element));

        // Potentially we moved the file already, so let's check first whether
        // we still have to move.
        if (file_exists($old_filepath)) {

          // Finaly rename the file and add it to results.
          $new_filepath = $tmp_upload_scheme . '://' . $name;
          $move_result = file_unmanaged_move($old_filepath, $new_filepath);
          if ($move_result) {
            $return['uploaded_files'][] = [
              'path' => $move_result,
              'filename' => $name,
            ];
          }
          else {
            drupal_set_message(self::t('There was a problem while processing the file named @name', [
              '@name' => $name,
            ]), 'error');
          }
        }
      }
    }
    $form_state
      ->setValueForElement($element, $return);
  }
  return $return;
}