class RevertOverridesForm

class RevertOverridesForm extends ConfirmFormBase {
  
  /**
   * The layout tempstore repository.
   *
   * @var \Drupal\layout_builder\LayoutTempstoreRepositoryInterface
   */
  protected $layoutTempstoreRepository;
  
  /**
   * The messenger service.
   *
   * @var \Drupal\Core\Messenger\MessengerInterface
   */
  protected $messenger;
  
  /**
   * The section storage.
   *
   * @var \Drupal\layout_builder\SectionStorageInterface
   */
  protected $sectionStorage;
  
  /**
   * Constructs a new RevertOverridesForm.
   *
   * @param \Drupal\layout_builder\LayoutTempstoreRepositoryInterface $layout_tempstore_repository
   *   The layout tempstore repository.
   * @param \Drupal\Core\Messenger\MessengerInterface $messenger
   *   The messenger service.
   */
  public function __construct(LayoutTempstoreRepositoryInterface $layout_tempstore_repository, MessengerInterface $messenger) {
    $this->layoutTempstoreRepository = $layout_tempstore_repository;
    $this->messenger = $messenger;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container->get('layout_builder.tempstore_repository'), $container->get('messenger'));
  }
  
  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'layout_builder_revert_overrides';
  }
  
  /**
   * {@inheritdoc}
   */
  public function getQuestion() {
    return $this->t('Are you sure you want to revert this to defaults?');
  }
  
  /**
   * {@inheritdoc}
   */
  public function getConfirmText() {
    return $this->t('Revert');
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCancelUrl() {
    return $this->sectionStorage
      ->getLayoutBuilderUrl();
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state, SectionStorageInterface $section_storage = NULL) {
    if (!$section_storage instanceof OverridesSectionStorageInterface) {
      throw new \InvalidArgumentException(sprintf('The section storage with type "%s" and ID "%s" does not provide overrides', $section_storage->getStorageType(), $section_storage->getStorageId()));
    }
    $this->sectionStorage = $section_storage;
    // Mark this as an administrative page for JavaScript ("Back to site" link).
    $form['#attached']['drupalSettings']['path']['currentPathIsAdmin'] = TRUE;
    return parent::buildForm($form, $form_state);
  }
  
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    // Remove all sections.
    $this->sectionStorage
      ->removeAllSections()
      ->save();
    $this->layoutTempstoreRepository
      ->delete($this->sectionStorage);
    $this->messenger
      ->addMessage($this->t('The layout has been reverted back to defaults.'));
    $form_state->setRedirectUrl($this->sectionStorage
      ->getRedirectUrl());
  }

}