public static function FileWidget::validateMultipleCount in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php \Drupal\file\Plugin\Field\FieldWidget\FileWidget::validateMultipleCount()

Form element validation callback for upload element on file widget. Checks if user has uploaded more files than allowed.

This validator is used only when cardinality not set to 1 or unlimited.

File

core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php, line 341

Class

FileWidget

Plugin implementation of the 'file_generic' widget.

Namespace

Drupal\file\Plugin\Field\FieldWidget

Code

public static function validateMultipleCount($element, FormStateInterface $form_state, $form) {
  $values = NestedArray::getValue($form_state
    ->getValues(), $element['#parents']);
  $array_parents = $element['#array_parents'];
  array_pop($array_parents);
  $previously_uploaded_count = count(Element::children(NestedArray::getValue($form, $array_parents))) - 1;
  $field_storage_definitions = \Drupal::service('entity_field.manager')
    ->getFieldStorageDefinitions($element['#entity_type']);
  $field_storage = $field_storage_definitions[$element['#field_name']];
  $newly_uploaded_count = count($values['fids']);
  $total_uploaded_count = $newly_uploaded_count + $previously_uploaded_count;
  if ($total_uploaded_count > $field_storage
    ->getCardinality()) {
    $keep = $newly_uploaded_count - $total_uploaded_count + $field_storage
      ->getCardinality();
    $removed_files = array_slice($values['fids'], $keep);
    $removed_names = [];
    foreach ($removed_files as $fid) {
      $file = File::load($fid);
      $removed_names[] = $file
        ->getFilename();
    }
    $args = [
      '%field' => $field_storage
        ->getName(),
      '@max' => $field_storage
        ->getCardinality(),
      '@count' => $total_uploaded_count,
      '%list' => implode(', ', $removed_names),
    ];
    $message = t('Field %field can only hold @max values but there were @count uploaded. The following files have been omitted as a result: %list.', $args);
    \Drupal::messenger()
      ->addWarning($message);
    $values['fids'] = array_slice($values['fids'], 0, $keep);
    NestedArray::setValue($form_state
      ->getValues(), $element['#parents'], $values);
  }
}