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.'));
    }

}