class BreakLockForm

class BreakLockForm extends EntityConfirmFormBase {
  
  /**
   * Stores the entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;
  
  /**
   * Stores the shared tempstore.
   *
   * @var \Drupal\Core\TempStore\SharedTempStore
   */
  protected $tempStore;
  
  /**
   * Constructs a \Drupal\views_ui\Form\BreakLockForm object.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\TempStore\SharedTempStoreFactory $temp_store_factory
   *   The factory for the temp store object.
   */
  public function __construct(EntityTypeManagerInterface $entity_type_manager, SharedTempStoreFactory $temp_store_factory) {
    $this->entityTypeManager = $entity_type_manager;
    $this->tempStore = $temp_store_factory->get('views');
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container->get('entity_type.manager'), $container->get('tempstore.shared'));
  }
  
  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'views_ui_break_lock_confirm';
  }
  
  /**
   * {@inheritdoc}
   */
  public function getQuestion() {
    return $this->t('Do you want to break the lock on view %name?', [
      '%name' => $this->entity
        ->id(),
    ]);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getDescription() {
    $locked = $this->tempStore
      ->getMetadata($this->entity
      ->id());
    $account = $this->entityTypeManager
      ->getStorage('user')
      ->load($locked->getOwnerId());
    $username = [
      '#theme' => 'username',
      '#account' => $account,
    ];
    return $this->t('By breaking this lock, any unsaved changes made by @user will be lost.', [
      '@user' => \Drupal::service('renderer')->render($username),
    ]);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCancelUrl() {
    return $this->entity
      ->toUrl('edit-form');
  }
  
  /**
   * {@inheritdoc}
   */
  public function getConfirmText() {
    return $this->t('Break lock');
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    if (!$this->tempStore
      ->getMetadata($this->entity
      ->id())) {
      $form['message']['#markup'] = $this->t('There is no lock on view %name to break.', [
        '%name' => $this->entity
          ->id(),
      ]);
      return $form;
    }
    return parent::buildForm($form, $form_state);
  }
  
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $this->tempStore
      ->delete($this->entity
      ->id());
    $form_state->setRedirectUrl($this->entity
      ->toUrl('edit-form'));
    $this->messenger()
      ->addStatus($this->t('The lock has been broken and you may now edit this view.'));
  }

}