class ManageConditions

abstract class ManageConditions extends FormBase {
    
    /**
     * @var \Drupal\Core\Condition\ConditionManager
     */
    protected $manager;
    
    /**
     * The builder of form.
     *
     * @var \Drupal\Core\Form\FormBuilder
     */
    protected $formBuilder;
    
    /**
     * @var string
     */
    protected $machine_name;
    
    /**
     *
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('plugin.manager.condition'), $container->get('form_builder'));
    }
    
    /**
     *
     */
    public function __construct(PluginManagerInterface $manager, FormBuilderInterface $form_builder) {
        $this->manager = $manager;
        $this->formBuilder = $form_builder;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'ctools_manage_conditions_form';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        $cached_values = $form_state->getTemporaryValue('wizard');
        $this->machine_name = $cached_values['id'];
        $form['#attached']['library'][] = 'core/drupal.dialog.ajax';
        $options = [];
        $contexts = $this->getContexts($cached_values);
        foreach ($this->manager
            ->getDefinitionsForContexts($contexts) as $plugin_id => $definition) {
            $options[$plugin_id] = (string) $definition['label'];
        }
        $form['items'] = [
            '#type' => 'markup',
            '#prefix' => '<div id="configured-conditions">',
            '#suffix' => '</div>',
            '#theme' => 'table',
            '#header' => [
                $this->t('Plugin Id'),
                $this->t('Summary'),
                $this->t('Operations'),
            ],
            '#rows' => $this->renderRows($cached_values),
            '#empty' => $this->t('No required conditions have been configured.'),
        ];
        $form['conditions'] = [
            '#type' => 'select',
            '#options' => $options,
        ];
        $form['add'] = [
            '#type' => 'submit',
            '#name' => 'add',
            '#value' => $this->t('Add Condition'),
            '#ajax' => [
                'callback' => [
                    $this,
                    'add',
                ],
                'event' => 'click',
            ],
            '#submit' => [
                'callback' => [
                    $this,
                    'submitForm',
                ],
            ],
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        $cached_values = $form_state->getTemporaryValue('wizard');
        [
            ,
            $route_parameters,
        ] = $this->getOperationsRouteInfo($cached_values, $this->machine_name, $form_state->getValue('conditions'));
        $form_state->setRedirect($this->getAddRoute($cached_values), $route_parameters);
    }
    
    /**
     *
     */
    public function add(array &$form, FormStateInterface $form_state) {
        $condition = $form_state->getValue('conditions');
        $content = $this->formBuilder
            ->getForm($this->getConditionClass(), $condition, $this->getTempstoreId(), $this->machine_name);
        $content['#attached']['library'][] = 'core/drupal.dialog.ajax';
        $cached_values = $form_state->getTemporaryValue('wizard');
        [
            ,
            $route_parameters,
        ] = $this->getOperationsRouteInfo($cached_values, $this->machine_name, $form_state->getValue('conditions'));
        $route_name = $this->getAddRoute($cached_values);
        $route_options = [
            'query' => [
                FormBuilderInterface::AJAX_FORM_REQUEST => TRUE,
            ],
        ];
        $url = Url::fromRoute($route_name, $route_parameters, $route_options);
        $content['submit']['#attached']['drupalSettings']['ajax'][$content['submit']['#id']]['url'] = $url->toString();
        $response = new AjaxResponse();
        $response->addCommand(new OpenModalDialogCommand($this->t('Configure Required Context'), $content, [
            'width' => '700',
        ]));
        return $response;
    }
    
    /**
     * @param $cached_values
     *
     * @return array
     */
    public function renderRows($cached_values) {
        $configured_conditions = [];
        foreach ($this->getConditions($cached_values) as $row => $condition) {
            
            /** @var \Drupal\Core\Condition\ConditionInterface $instance */
            $instance = $this->manager
                ->createInstance($condition['id'], $condition);
            [
                $route_name,
                $route_parameters,
            ] = $this->getOperationsRouteInfo($cached_values, $cached_values['id'], $row);
            $build = [
                '#type' => 'operations',
                '#links' => $this->getOperations($route_name, $route_parameters),
            ];
            $configured_conditions[] = [
                $instance->getPluginId(),
                $instance->summary(),
                'operations' => [
                    'data' => $build,
                ],
            ];
        }
        return $configured_conditions;
    }
    
    /**
     *
     */
    protected function getOperations($route_name_base, array $route_parameters = []) {
        $operations['edit'] = [
            'title' => $this->t('Edit'),
            'url' => new Url($route_name_base . '.edit', $route_parameters),
            'weight' => 10,
            'attributes' => [
                'class' => [
                    'use-ajax',
                ],
                'data-dialog-type' => 'modal',
                'data-dialog-options' => Json::encode([
                    'width' => 700,
                ]),
            ],
        ];
        $route_parameters['id'] = $route_parameters['condition'];
        $operations['delete'] = [
            'title' => $this->t('Delete'),
            'url' => new Url($route_name_base . '.delete', $route_parameters),
            'weight' => 100,
            'attributes' => [
                'class' => [
                    'use-ajax',
                ],
                'data-dialog-type' => 'modal',
                'data-dialog-options' => Json::encode([
                    'width' => 700,
                ]),
            ],
        ];
        return $operations;
    }
    
    /**
     * Return a subclass of '\Drupal\ctools\Form\ConditionConfigure'.
     *
     * The ConditionConfigure class is designed to be subclassed with custom
     * route information to control the modal/redirect needs of your use case.
     *
     * @return string
     */
    protected abstract function getConditionClass();
    
    /**
     * The route to which condition 'add' actions should submit.
     *
     * @param mixed $cached_values
     *
     * @return string
     */
    protected abstract function getAddRoute($cached_values);
    
    /**
     * Provide the tempstore id for your specified use case.
     *
     * @return string
     */
    protected abstract function getTempstoreId();
    
    /**
     * Document the route name and parameters for edit/delete context operations.
     *
     * The route name returned from this method is used as a "base" to which
     * ".edit" and ".delete" are appended in the getOperations() method.
     * Subclassing '\Drupal\ctools\Form\ConditionConfigure' and
     * '\Drupal\ctools\Form\ConditionDelete' should set you up for using this
     * approach quite seamlessly.
     *
     * @param mixed $cached_values
     *
     * @param string $machine_name
     *
     * @param string $row
     *
     * @return array
     *   In the format of
     *   return ['route.base.name', ['machine_name' => $machine_name, 'context' => $row]];
     */
    protected abstract function getOperationsRouteInfo($cached_values, $machine_name, $row);
    
    /**
     * Custom logic for retrieving the conditions array from cached_values.
     *
     * @param $cached_values
     *
     * @return array
     */
    protected abstract function getConditions($cached_values);
    
    /**
     * Custom logic for retrieving the contexts array from cached_values.
     *
     * @param $cached_values
     *
     * @return \Drupal\Core\Plugin\Context\ContextInterface[]
     */
    protected abstract function getContexts($cached_values);

}