feat: add RSS feed

src/Controller/RSSFeedController.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Controller;
+
+use App\Services\RSSFeed\RSSFeed;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Attribute\Cache;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route(
+    '/rss',
+    name: 'cartesgouvfr_rss_feed_',
+    options: ['expose' => true],
+)]
+class RSSFeedController extends AbstractController
+{
+    #[Route('/alerts', name: 'alerts')]
+    #[Cache(public: true, maxage: 3600, mustRevalidate: true)]
+    public function alerts(RSSFeed $rssFeed): Response
+    {
+        try {
+            $xml = $rssFeed->renderRssAlerts();
+
+            return new Response($xml, Response::HTTP_OK, [
+                'Content-Type' => 'application/xml',
+            ]);
+        } catch (\Throwable $th) {
+            return new Response($th->getMessage(), Response::HTTP_INTERNAL_SERVER_ERROR);
+        }
+    }
+}

src/Services/RSSFeed/RSSFeed.php

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+<?php
+
+namespace App\Services\RSSFeed;
+
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\RouterInterface;
+use Symfony\Contracts\Cache\CacheInterface;
+use Symfony\Contracts\Cache\ItemInterface;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Twig\Environment as TwigEnvironment;
+
+class RSSFeed
+{
+    private const ALERTS_JSON_URL = 'https://data.geopf.fr/annexes/cartes.gouv.fr-config/public/alerts.json';
+
+    private HttpClientInterface $httpClient;
+
+    public function __construct(
+        private RouterInterface $router,
+        private TwigEnvironment $twig,
+        private CacheInterface $cache,
+        ParameterBagInterface $parameters,
+        HttpClientInterface $httpClient,
+    ) {
+        $this->httpClient = $httpClient->withOptions([
+            'proxy' => $parameters->get('http_proxy'),
+            'verify_peer' => false,
+            'verify_host' => false,
+        ]);
+    }
+
+    public function renderRssAlerts(): string
+    {
+        $alerts = $this->getAlerts();
+
+        $alerts = array_map(function (array $alert) {
+            // ajout de la racine dans l'URL si non absolue
+            $url = $alert['link']['url'];
+            if ('/' === mb_substr($url, 0, 1)) {
+                $alert['link']['url'] = substr($this->router->generate('cartesgouvfr_app', [], RouterInterface::ABSOLUTE_URL), 0, -1).$url;
+            }
+
+            // formattage de date
+            $date = new \DateTime($alert['date']);
+            $alert['date'] = $date->format(\DateTime::RSS);
+
+            return $alert;
+        }, $alerts);
+
+        $link = $this->router->generate('cartesgouvfr_rss_feed_alerts', [], RouterInterface::ABSOLUTE_URL);
+
+        return $this->twig->render('rss/alerts.xml.twig', [
+            'alerts' => $alerts,
+            'link' => $link,
+        ]);
+    }
+
+    private function getAlerts(): array
+    {
+        return $this->cache->get('alerts', function (ItemInterface $item) {
+            $item->expiresAfter(3600);
+
+            $response = $this->httpClient->request('GET', self::ALERTS_JSON_URL);
+            if (Response::HTTP_OK !== $response->getStatusCode()) {
+                throw new \Exception('Une erreur est survenue, veuillez réessayer ultérieurement');
+            }
+
+            return $response->toArray();
+        });
+    }
+}

templates/rss/alerts.xml.twig

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+<?xml version="1.0" encoding="UTF-8" ?>
+<rss version="2.0">
+<channel>
+    <title>cartes.gouv.fr - Alertes</title>
+    <description>Suivez les alertes, incidents ou maintenances programmées de cartes.gouv.fr et la géoplateforme</description>
+    <link>{{ link }}</link>
+    <language>fr-fr</language>
+    {# <copyright>2020 Example.com All rights reserved</copyright> #}
+    {# <lastBuildDate>Mon, 6 Sep 2010 00:01:00 +0000</lastBuildDate>
+    <pubDate>Sun, 6 Sep 2009 16:20:00 +0000</pubDate> #}
+    <ttl>3600</ttl>
+
+    {% for alert in alerts %}
+        <item>
+            <title>{{ alert.title }}</title>
+            <description>{{ alert.description }}</description>
+            <link>{{ alert.link.url }}</link>
+            <guid>{{ alert.id }}</guid>
+            <pubDate>{{ alert.date }}</pubDate>
+        </item>
+    {% endfor %}
+
+</channel>
+</rss>