Event subscriber to perform redirects based on user role.

Submitted by Dmitro on Sat, 15/07/2023 - 21:47

Create file custom_base/src/EventSubscriber/FrontpageRedirectSubscriber.php:

<?php
namespace Drupal\custom_base\EventSubscriber;
use Drupal\Core\Path\PathMatcherInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\Url;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\KernelEvents;
/**
 * Event subscriber to perform redirects based on user role.
 */
class FrontpageRedirectSubscriber implements EventSubscriberInterface {
  /**
   * Current logged in user.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $currentUser;
  /**
   * The path matcher.
   *
   * @var \Drupal\Core\Path\PathMatcherInterface
   */
  protected $pathMatcher;
  /**
   * Constructs a new ViewsRedirectSubscriber object.
   *
   * @param \Drupal\Core\Session\AccountInterface $current_user
   *   The current user.
   * @param \Drupal\Core\Path\PathMatcherInterface $path_matcher
   *   The path matcher service.
   */
  public function __construct(
    AccountInterface $current_user,
    PathMatcherInterface $path_matcher
  ) {
    $this->currentUser = $current_user;
    $this->pathMatcher = $path_matcher;
  }
  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {
    $events[KernelEvents::REQUEST][] = ['performRoleRedirect'];
    return $events;
  }
  /**
   * Performs redirect based on user role.
   */
  public function performRoleRedirect(RequestEvent $event) {
    $roles = $this->currentUser->getRoles();
    $isFrontPage = $this->pathMatcher->isFrontPage();
    if ($isFrontPage) {
      foreach ($roles as $role) {
        $url = NULL;
        switch ($role) {
          case ROLE_ADMIN:
            $url = Url::fromRoute('view.admin.page')
              ->toString();
            break;
          case ROLE_READER:
            $url = Url::fromRoute('view.reader_list.page_1')
              ->toString();
            break;
          case ROLE_MANAGER:
            $url = Url::fromRoute('view.manager.page_1')
              ->toString();
            break;
        }
        if (!empty($url)) {
          $response = new RedirectResponse($url);
          $event->setResponse($response);
          $event->stopPropagation();
        }
      }
    }
  }
}

Add to servises.yml:

custom_base_frontpage.event_subscriber:
  class: Drupal\custom_base\EventSubscriber\FrontpageRedirectSubscriber
  arguments:
    - '@current_user'
    - '@path.matcher'
  tags:
    - { name: event_subscriber }

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