public function AjaxCommentsDeleteForm::buildForm in AJAX Comments 8

Form constructor.

Parameters

array $form: An associative array containing the structure of the form.

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

Return value

array The form structure.

Overrides ContentEntityDeleteForm::buildForm

File

src/Form/AjaxCommentsDeleteForm.php, line 64

Class

AjaxCommentsDeleteForm

Provides ajax enhancements to core Comment delete form.

Namespace

Drupal\ajax_comments\Form

Code

public function buildForm(array $form, FormStateInterface $form_state, CommentInterface $comment = NULL) {
  $form = parent::buildForm($form, $form_state);

  // Check if this form is being loaded through ajax or as a modal dialog.
  $request = $this->requestStack
    ->getCurrentRequest();
  $is_ajax_request = Utility::isAjaxRequest($request, $form_state
    ->getUserInput());
  $is_modal_request = Utility::isModalRequest($request);
  if ($is_modal_request || $is_ajax_request) {

    // In some circumstances the $comment object needs to be initialized.
    if (empty($comment)) {
      $comment = $form_state
        ->getFormObject()
        ->getEntity();
    }

    // Get the selectors from the request.
    $this->tempStore
      ->getSelectors($request, $overwrite = TRUE);
    $wrapper_html_id = $this->tempStore
      ->getSelectorValue($request, 'wrapper_html_id');

    // Add the wrapping fields's HTML id as a hidden input
    // so we can access it in the controller.
    $form['wrapper_html_id'] = [
      '#type' => 'hidden',
      '#value' => $wrapper_html_id,
    ];

    // Add a class to target this form in JavaScript.
    $form['#attributes']['class'][] = 'ajax-comments';

    // Add a class to the cancel button to trigger modal dialog close.
    $form['actions']['cancel']['#attributes']['class'][] = 'dialog-cancel';

    // Set up this form to ajax submit so that we aren't redirected to
    // another page upon clicking the 'Delete' button.
    $form['actions']['submit']['#ajax'] = [
      'url' => Url::fromRoute('ajax_comments.delete', [
        'comment' => $comment
          ->id(),
      ]),
      'wrapper' => $wrapper_html_id,
      'method' => 'replace',
      'effect' => 'fade',
    ];
  }
  return $form;
}