Symfony 6 Sitemap Generator

SitemapController.php

<?php

namespace App\Controller;

use App\Repository\PostRepository;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;

class SitemapController extends AbstractController
{
    public function __construct(PostRepository $blogPostRepository)
    {
        $this->blogPostRepository = $blogPostRepository;
    }

    #[Route('/sitemap.xml', name: 'sitemap')]
    public function index()
    {
        // find published blog posts from db
        $posts = $this->blogPostRepository->findBy(['published' => 1]);
        $urls = [];
        foreach ($posts as $post) {
            $urls[] = [
                'loc' => $this->generateUrl(
                    'post',
                    ['slug' => $post->getSlug()],
                    UrlGeneratorInterface::ABSOLUTE_URL
                ),
                'lastmod' => $post->getUpdatedAt()->format('Y-m-d'),
                'changefreq' => 'weekly',
                'priority' => '0.5',
            ];
        }

        $response = new Response(
            $this->renderView('./sitemap/sitemap.html.twig', ['urls' => $urls]),
            200
        );
        $response->headers->set('Content-Type', 'text/xml');

        return $response;
    }
}