rules-8.x-3.x-dev/src/EventSubscriber/RedirectEventSubscriber.php

<?php

namespace Drupal\rules\EventSubscriber;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpKernel\Event\ResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;

/**
 * Changes the response to a redirect, if a redirect rules action was executed .
 */
class RedirectEventSubscriber implements EventSubscriberInterface {

  /**
   * Checks if a redirect rules action was executed.
   *
   * Redirects to the provided url if there is one.
   *
   * @param \Symfony\Component\HttpKernel\Event\ResponseEvent $event
   *   The response event.
   */
  public function checkRedirectIssued(ResponseEvent $event): void {
    $request = $event->getRequest();
    $redirect_url = $request->attributes->get('_rules_redirect_action_url');
    if (isset($redirect_url)) {
      $event->setResponse(new RedirectResponse($redirect_url));
    }
  }

  /**
   * Registers the methods in this class that should be listeners.
   *
   * @return array
   *   An array of event listener definitions.
   */
  public static function getSubscribedEvents(): array {
    $events[KernelEvents::RESPONSE][] = ['checkRedirectIssued'];
    return $events;
  }

}