class AntibotFormAlter in Antibot 8

Provides a trusted callback to alter Antibot form.

Hierarchy

• class \Drupal\antibot\AntibotFormAlter implements RenderCallbackInterface

1 file declares its use of AntibotFormAlter

antibot.module in ./antibot.module

Implements the antibot module.

File

src/AntibotFormAlter.php, line 10

Namespace

Drupal\antibot

class AntibotFormAlter implements RenderCallbackInterface {

  /**
   * Callback #pre_render: Alter forms.
   */
  public static function preRender($build) {

    // Add the Antibot library.
    $build['#attached']['library'][] = 'antibot/antibot.form';

    // Store the form ID that the JS can replace the action path along with the
    // form key.
    $form_id = $build['#id'];
    if (isset($build['#attributes']['id'])) {
      $form_id = $build['#attributes']['id'];
    }
    $build['#attached']['drupalSettings']['antibot']['forms'][$build['#id']] = [
      'id' => $form_id,
      'key' => $build['#antibot_key'],
    ];

    // Store the action placeholder as an attribute so that it converts
    // during the building of the form. This is needed because in Drupal 8
    // the form action is a placeholder that is not added until the very
    // last moment, in order to keep the form cacheable.
    $build['#attributes']['data-action'] = $build['#action'];

    // Change the action so the submission does not go through.
    $build['#action'] = base_path() . 'antibot';

    // Add a class to the form.
    $build['#attributes']['class'][] = 'antibot';
    return $build;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AntibotFormAlter::preRender	public static	function	Callback #pre_render: Alter forms.