class RulesUiConfigHandler

class RulesUiConfigHandler extends PluginBase implements RulesUiHandlerInterface, ContainerFactoryPluginInterface {
  use TempStoreTrait;
  
  /**
   * The rules UI (plugin) definition.
   *
   * @var \Drupal\rules\Ui\RulesUiDefinition
   */
  protected $pluginDefinition;
  
  /**
   * The current route match.
   *
   * @var \Drupal\Core\Routing\RouteMatchInterface
   */
  protected $currentRouteMatch;
  
  /**
   * The config factory.
   *
   * @var \Drupal\Core\Config\ConfigFactoryInterface
   */
  protected $configFactory;
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container->get('current_route_match'), $container->get('config.factory'));
  }
  
  /**
   * {@inheritdoc}
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, RouteMatchInterface $route_match, ConfigFactoryInterface $config_factory) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->currentRouteMatch = $route_match;
    $this->configFactory = $config_factory;
  }
  
  /**
   * Gets the edited config object.
   *
   * @return \Drupal\rules\Ui\RulesUiComponentProviderInterface|\Drupal\Core\Config\Config
   *   The component provider object (usually a config entity) or the editable
   *   config object.
   */
  public function getConfig() {
    $config = $this->fetchFromTempStore();
    if (!$config) {
      if (isset($this->pluginDefinition->settings['config_parameter'])) {
        $config = $this->currentRouteMatch
          ->getParameter($this->pluginDefinition->settings['config_parameter']);
      }
      else {
        $config = $this->configFactory
          ->getEditable($this->pluginDefinition->settings['config_name']);
      }
    }
    return $config;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getComponentLabel() {
    if (isset($this->pluginDefinition->component_label)) {
      return $this->pluginDefinition->component_label;
    }
    elseif ($this->getConfig() instanceof EntityInterface) {
      return $this->getConfig()
        ->label();
    }
    else {
      return $this->pluginDefinition->component_type_label;
    }
  }
  
  /**
   * {@inheritdoc}
   */
  public function getComponent() {
    $config = $this->getConfig();
    if ($config instanceof RulesUiComponentProviderInterface) {
      return $config->getComponent();
    }
    else {
      $configuration = $config->get($this->pluginDefinition->settings['config_key']);
      return RulesComponent::createFromConfiguration($configuration);
    }
  }
  
  /**
   * {@inheritdoc}
   */
  public function updateComponent(RulesComponent $component) {
    $config = $this->getConfig();
    if ($config instanceof RulesUiComponentProviderInterface) {
      $config->updateFromComponent($component);
    }
    else {
      $config->set($this->pluginDefinition->settings['config_key'], $component->getConfiguration());
    }
    $this->storeToTempStore($config);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getBaseRouteUrl(array $options = []) {
    // @see \Drupal\Core\Url::fromRouteMatch()
    return Url::fromRoute($this->pluginDefinition->base_route, $this->currentRouteMatch
      ->getRawParameters()
      ->all(), $options);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getUrlFromRoute($route_suffix, array $route_parameters, array $options = []) {
    // @see \Drupal\Core\Url::fromRouteMatch()
    return Url::fromRoute($this->pluginDefinition->base_route . '.' . $route_suffix, $route_parameters + $this->currentRouteMatch
      ->getRawParameters()
      ->all(), $options);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getForm() {
    return new EmbeddedComponentForm($this);
  }

}