Redirect to another action, regarding to the role (Symfony)

RedirectToAdminZoneListener.php

<?php

namespace AppBundle\EventListener;

use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\Routing\Router;
use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface;

/**
 * Defines the method that 'listens' to the 'kernel.request' event, which is
 * triggered whenever a request is handled by the application.
 * See http://symfony.com/doc/current/book/internals.html#kernel-request-event
 *
 * Tip: listeners are common in Symfony applications, but this particular listener
 * is too advanced and too specific for the demo application needs. For more common
 * examples see http://symfony.com/doc/current/cookbook/service_container/event_listener.html
 *
 * @author Mickaël Andrieu <andrieu.travail@gmail.com>
 */
class RedirectToAdminZoneListener
{
    private $authorizationChecker;
    private $router;

    public function __construct(AuthorizationCheckerInterface $authorizationChecker, Router $router)
    {
        $this->authorizationChecker = $authorizationChecker;
        $this->router = $router;
    }

    public function onKernelRequest(GetResponseEvent $event)
    {
        if (HttpKernelInterface::MASTER_REQUEST === $event->getRequestType()) {
            $route = $event->getRequest()->get('_route');
            if ($this->authorizationChecker->isGranted('ROLE_ADMIN') && $route == 'homepage') {
                $response = new RedirectResponse($this->router->generate('homepage_admin'));
                $event->setResponse($response);
            }
        }
    }
}

/**
 * # app/config/config.yml (or inside your services.yml)
 * services:
 *   demo.redirect.admin.action_listener:
 *       class: Acme\AppBundle\EventListener\RedirectToAdminZoneListener
 *       arguments: [ @security.authorization_checker, @router ]
 *       tags:
 *           - { name: kernel.event_listener, event: kernel.request method: onKernelRequest }
 */