class ResolverRelationshipDelete

abstract class ResolverRelationshipDelete extends ConfirmFormBase {
    
    /**
     * Tempstore Factory.
     *
     * @var \Drupal\Core\TempStore\SharedTempStoreFactory
     */
    protected $tempstore;
    
    /**
     * The resolver service.
     *
     * @var \Drupal\ctools\TypedDataResolver
     */
    protected $resolver;
    
    /**
     * Tempstore ID.
     *
     * @var string
     */
    protected $tempstore_id;
    
    /**
     * Machine name of the relationship.
     *
     * @var string
     */
    protected $machine_name;
    
    /**
     * Resolver ID.
     *
     * @var string
     */
    protected $id;
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('tempstore.shared'), $container->get('ctools.typed_data.resolver'));
    }
    
    /**
     * Resolver Relationship Delete Form Constructor.
     *
     * @param \Drupal\Core\TempStore\SharedTempStoreFactory $tempstore
     *   The shared tempstore.
     * @param \Drupal\ctools\TypedDataResolver $resolver
     *   The typed data resolver.
     */
    public function __construct(SharedTempStoreFactory $tempstore, TypedDataResolver $resolver) {
        $this->tempstore = $tempstore;
        $this->resolver = $resolver;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'ctools_resolver_relationship_delete';
    }
    
    /**
     * {@inheritdoc}
     */
    public function getQuestion($id = NULL, $cached_values = []) {
        $context = $this->getContexts($cached_values)[$id];
        return $this->t('Are you sure you want to delete the @label relationship?', [
            '@label' => $context->getContextDefinition()
                ->getLabel(),
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    public abstract function getCancelUrl($cached_values = []);
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state, $id = NULL, $tempstore_id = NULL, $machine_name = NULL) {
        $this->tempstore_id = $tempstore_id;
        $this->machine_name = $machine_name;
        $this->id = $id;
        $cached_values = $this->tempstore
            ->get($this->tempstore_id)
            ->get($this->machine_name);
        $form['#title'] = $this->getQuestion($id, $cached_values);
        $form['#attributes']['class'][] = 'confirmation';
        $form['description'] = [
            '#markup' => $this->getDescription(),
        ];
        $form[$this->getFormName()] = [
            '#type' => 'hidden',
            '#value' => 1,
        ];
        // By default, render the form using theme_confirm_form().
        if (!isset($form['#theme'])) {
            $form['#theme'] = 'confirm_form';
        }
        $form['actions'] = [
            '#type' => 'actions',
        ];
        $form['actions'] += $this->actions($form, $form_state, $cached_values);
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        $cached_values = $this->tempstore
            ->get($this->tempstore_id)
            ->get($this->machine_name);
        $form_state->setRedirectUrl($this->getCancelUrl($cached_values));
    }
    
    /**
     * A custom form actions method.
     *
     * @param array $form
     *   The form array.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   The current form state.
     * @param $cached_values
     *   The current wizard cached values.
     *
     * @return array
     *   Actions to call.
     */
    protected function actions(array $form, FormStateInterface $form_state, $cached_values) {
        return [
            'submit' => [
                '#type' => 'submit',
                '#value' => $this->getConfirmText(),
                '#validate' => [
                    [
                        $this,
                        'validate',
                    ],
                ],
                '#submit' => [
                    [
                        $this,
                        'submitForm',
                    ],
                ],
            ],
            'cancel' => ConfirmFormHelper::buildCancelLink($this, $this->getRequest()),
        ];
    }
    
    /**
     * Extract contexts from the cached values.
     *
     * @param array $cached_values
     *   The cached values.
     *
     * @return \Drupal\Core\Plugin\Context\ContextInterface[]
     *   Contexts from the cached values.
     */
    public abstract function getContexts(array $cached_values);

}