class RelationshipConfigure

abstract class RelationshipConfigure extends FormBase {
    
    /**
     * Tempstore Factory.
     *
     * @var \Drupal\Core\TempStore\SharedTempStoreFactory
     */
    protected $tempstore;
    
    /**
     * Typed Data Resolver Service.
     *
     * @var \Drupal\ctools\TypedDataResolver
     */
    protected $resolver;
    
    /**
     * Tempstore ID.
     *
     * @var string
     */
    protected $tempstore_id;
    
    /**
     * Relationship Machine Name.
     *
     * @var string
     */
    protected $machine_name;
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('tempstore.shared'), $container->get('ctools.typed_data.resolver'));
    }
    
    /**
     * Configure Relationship Form constructor.
     *
     * @param \Drupal\Core\TempStore\SharedTempStoreFactory $tempstore
     *   Tempstore Service.
     * @param \Drupal\ctools\TypedDataResolver $resolver
     *   Typed Data Resolver Service.
     */
    public function __construct(SharedTempStoreFactory $tempstore, TypedDataResolver $resolver) {
        $this->tempstore = $tempstore;
        $this->resolver = $resolver;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'ctools_relationship_configure';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state, $context_id = NULL, $tempstore_id = NULL, $machine_name = NULL) {
        $this->tempstore_id = $tempstore_id;
        $this->machine_name = $machine_name;
        $cached_values = $this->tempstore
            ->get($this->tempstore_id)
            ->get($this->machine_name);
        
        /** @var \Drupal\Core\Plugin\Context\ContextInterface[] $contexts */
        $contexts = $this->getContexts($cached_values);
        $context_object = $this->resolver
            ->convertTokenToContext($context_id, $contexts);
        $form['id'] = [
            '#type' => 'value',
            '#value' => $context_id,
        ];
        $form['context_object'] = [
            '#type' => 'value',
            '#value' => $context_object,
        ];
        $form['label'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Context label'),
            '#default_value' => !empty($contexts[$context_id]) ? $contexts[$context_id]->getContextDefinition()
                ->getLabel() : $this->resolver
                ->getLabelByToken($context_id, $contexts),
            '#required' => TRUE,
        ];
        $form['context_data'] = [
            '#type' => 'item',
            '#title' => $this->t('Data type'),
            '#markup' => $context_object->getContextDefinition()
                ->getDataType(),
        ];
        $form['submit'] = [
            '#type' => 'submit',
            '#value' => $this->t('Save'),
            '#ajax' => [
                'callback' => [
                    $this,
                    'ajaxSave',
                ],
            ],
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        $cached_values = $this->tempstore
            ->get($this->tempstore_id)
            ->get($this->machine_name);
        [
            $route_name,
            $route_options,
        ] = $this->getParentRouteInfo($cached_values);
        $form_state->setRedirect($route_name, $route_options);
    }
    
    /**
     * Ajax Save Method.
     *
     * @param array $form
     *   Drupal Form.
     * @param \Drupal\Core\Form\FormStateInterface $form_state
     *   Form State.
     *
     * @return \Drupal\Core\Ajax\AjaxResponse
     *   The ajax data in the response.
     */
    public function ajaxSave(array &$form, FormStateInterface $form_state) {
        $cached_values = $this->tempstore
            ->get($this->tempstore_id)
            ->get($this->machine_name);
        [
            $route_name,
            $route_parameters,
        ] = $this->getParentRouteInfo($cached_values);
        $response = new AjaxResponse();
        $url = Url::fromRoute($route_name, $route_parameters);
        $response->addCommand(new RedirectCommand($url->toString()));
        $response->addCommand(new CloseModalDialogCommand());
        return $response;
    }
    
    /**
     * Document the route name and parameters for redirect after submission.
     *
     * @param array $cached_values
     *   Cached Values get route info from.
     *
     * @return array In the format of
     *   In the format of
     *   return ['route.name',
     *      ['machine_name' => $this->machine_name, 'step' => 'step_name']];
     */
    protected abstract function getParentRouteInfo(array $cached_values);
    
    /**
     * Custom logic for setting the conditions array in cached_values.
     *
     * @param array $cached_values
     *
     * @param mixed $contexts
     *   The conditions to set within the cached values.
     *
     * @return mixed
     *   Return the $cached_values
     */
    protected abstract function setContexts(array $cached_values, mixed $contexts);
    
    /**
     * Custom logic for retrieving the contexts array from cached_values.
     *
     * @param array $cached_values
     *   Cached Values contexts are fetched from.
     *
     * @return \Drupal\Core\Plugin\Context\ContextInterface[]
     */
    protected abstract function getContexts(array $cached_values);

}