function LinkWidget::validateUriElement

Form element validation handler for the 'uri' element.

Disallows saving inaccessible or untrusted URLs.

File

core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php, line 143

Class

LinkWidget

Plugin implementation of the 'link' widget.

Namespace

Code

public static function validateUriElement($element, FormStateInterface $form_state, $form) {
  $uri = static::getUserEnteredStringAsUri($element['#value']);
  $form_state->setValueForElement($element, $uri);
  // If getUserEnteredStringAsUri() mapped the entered value to an 'internal:'
  // URI , ensure the raw value begins with '/', '?' or '#'.
  // @todo '<front>' is valid input for BC reasons, may be removed by
  //   https://www.drupal.org/node/2421941
  if (parse_url($uri, PHP_URL_SCHEME) === 'internal' && !in_array($element['#value'][0], [
    '/',
    '?',
    '#',
  ], TRUE) && !str_starts_with($element['#value'], '<front>')) {
    // Display an error message according to the link type.
    $args = [
      '%link_example' => 'https://example.com',
    ];
    switch ($element['#link_type']) {
      case LinkItemInterface::LINK_EXTERNAL:
        $error_message = new TranslatableMarkup('External links must be a full URL including the protocol, such as %link_example.', $args);
        break;

      case LinkItemInterface::LINK_INTERNAL:
        $error_message = new TranslatableMarkup('Enter a content title to select it, or enter an internal path starting with /, ? or #.');
        break;

      case LinkItemInterface::LINK_GENERIC:
      default:
        $error_message = new TranslatableMarkup('Enter a content title to select it, or enter an internal path starting with /, ? or #. External links must be a full URL including the protocol, such as %link_example.', $args);
    }
    $form_state->setError($element, $error_message);
    return;
  }
}