<?php

namespace App\EventListener;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Component\Security\Core\Exception\AccessDeniedException;

class ExceptionListener implements EventSubscriberInterface
{
    private $router;

    public function __construct(UrlGeneratorInterface $router)
    {
        $this->router = $router;
    }

    public static function getSubscribedEvents(): array
    {
        return [
            // the priority must be greater than the Security HTTP
            // ExceptionListener, to make sure it's called before
            // the default exception listener
            KernelEvents::EXCEPTION => ['onKernelException', 2],
        ];
    }

    public function onKernelException(ExceptionEvent $event): void
    {
        $exception = $event->getThrowable();
        if (!$exception instanceof AccessDeniedException && !$exception instanceof NotFoundHttpException) {
            return;
        }

        $response = new RedirectResponse($this->router->generate('app_home'));

        // optionally set the custom response
        $event->setResponse($response);
    }
}