Implementing RSS feed draft.

composer.json

@@ -19,6 +19,7 @@
         "excelwebzone/recaptcha-bundle": "^1.5",
         "sensio/framework-extra-bundle": "^5.1",
         "sentry/sentry-symfony": "^3.4",
+        "suin/php-rss-writer": "^1.6",
         "symfony/console": "^4.1",
         "symfony/dotenv": "^4.1",
         "symfony/expression-language": "^4.1",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "9c91e35bbd8ba2b05ea2a98ac74d5b97",
+    "content-hash": "4d9cea51c5990806109db1a193618598",
     "packages": [
         {
             "name": "clue/stream-filter",
@@ -3440,6 +3440,55 @@
             ],
             "time": "2020-03-16T09:07:07+00:00"
         },
+        {
+            "name": "suin/php-rss-writer",
+            "version": "1.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/suin/php-rss-writer.git",
+                "reference": "78f45e44a2a7cb0d82e4b9efb6f7b7a075b9051c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/suin/php-rss-writer/zipball/78f45e44a2a7cb0d82e4b9efb6f7b7a075b9051c",
+                "reference": "78f45e44a2a7cb0d82e4b9efb6f7b7a075b9051c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "eher/phpunit": ">=1.6",
+                "mockery/mockery": ">=0.7.2",
+                "suin/xoopsunit": ">=1.2"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "Suin\\RSSWriter": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "suin",
+                    "email": "suinyeze@gmail.com"
+                }
+            ],
+            "description": "Yet another simple RSS writer library for PHP 5.4 or later.",
+            "homepage": "https://github.com/suin/php-rss-writer",
+            "keywords": [
+                "feed",
+                "generator",
+                "php",
+                "rss",
+                "writer"
+            ],
+            "time": "2017-07-13T10:47:50+00:00"
+        },
         {
             "name": "symfony/cache",
             "version": "v5.0.7",

config/routes.yaml

@@ -90,3 +90,12 @@ api_v1_torrents_show:
         method: GET
         _format:  json
         id: '\d+'
+
+api_v1_rss_last:
+    path: /api/v1/feed/rss/last
+    controller: App\Api\V1\Controller\RssController::last
+    defaults:
+        _format: xml
+    requirements:
+        method: GET
+        _format: xml

src/Api/V1/Controller/RssController.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Api\V1\Controller;
+
+use App\Feed\RssGenerator;
+use Symfony\Component\HttpFoundation\{Request, Response};
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+
+class RssController extends AbstractController
+{
+    private const CONTENT_TYPE = 'application/rss+xml';
+
+    public function last(Request $request, RssGenerator $generator): Response
+    {
+        $page = (int) $request->query->get('page', '1');
+
+        $xml = $generator->generateLast($page);
+
+        return new Response($xml, 200, ['Content-Type' => self::CONTENT_TYPE]);
+    }
+}

src/Feed/RssGenerator.php

@@ -0,0 +1,133 @@
+<?php
+
+
+namespace App\Feed;
+
+use App\Magnet\MagnetGenerator;
+use App\Magnetico\Entity\Torrent;
+use App\Magnetico\Repository\TorrentRepository;
+use App\Pager\PagelessDoctrineORMAdapter;
+use Doctrine\ORM\QueryBuilder;
+use Pagerfanta\Pagerfanta;
+use Suin\RSSWriter\{Channel, Feed, Item};
+use Symfony\Component\Routing\{Generator\UrlGeneratorInterface, RouterInterface};
+
+/**
+ * Generates RSS feed.
+ *
+ * @see https://www.bittorrent.org/beps/bep_0036.html
+ */
+class RssGenerator
+{
+    private const PER_PAGE = 1000;
+    private const MIME_TYPE = 'application/x-bittorrent';
+
+    private TorrentRepository $repo;
+    private RouterInterface $router;
+    private MagnetGenerator $magnetGenerator;
+
+    public function __construct(TorrentRepository $repo, RouterInterface $router, MagnetGenerator $magnetGenerator)
+    {
+        $this->repo = $repo;
+        $this->router = $router;
+        $this->magnetGenerator = $magnetGenerator;
+    }
+
+    public function generateLast(int $page): string
+    {
+        $qb = $this->createLastTorrentsQueryBuilder();
+        $pager = new Pagerfanta(new PagelessDoctrineORMAdapter($qb));
+        $pager
+            ->setAllowOutOfRangePages(true)
+            ->setCurrentPage($page)
+            ->setMaxPerPage(self::PER_PAGE)
+        ;
+
+        $feed = $this->createFeedFromTorrents($pager->getCurrentPageResults());
+
+        return $feed->render();
+    }
+
+    private function createFeedFromTorrents(\Traversable $torrents): Feed
+    {
+        $feed = new Feed();
+        $channel = $this->createChannel();
+        $feed->addChannel($channel);
+
+        foreach ($this->createItemsFromTorrents($torrents) as $item) {
+            $channel->addItem($item);
+        }
+
+        // TODO feed pagination
+
+        return $feed;
+    }
+
+    private function createChannel(): Channel
+    {
+        $time = time();
+
+        $channel = new Channel();
+        $channel
+            ->title('Last')
+            ->description('Last torrents')
+            ->url($this->generateUrl('index'))
+            ->feedUrl($this->generateUrl('api_v1_rss_last'))
+            ->language('en-US')
+            ->pubDate($time)
+            ->lastBuildDate($time)
+            ->ttl(15)
+        ;
+
+        return $channel;
+    }
+
+    /**
+     * @param Torrent[]|\Traversable $torrents
+     *
+     * @return Item[]
+     */
+    private function createItemsFromTorrents(\Traversable $torrents): array
+    {
+        $items = [];
+
+        foreach ($torrents as $torrent) {
+            $items[] = $this->createItemFromTorrent($torrent);
+        }
+
+        return $items;
+    }
+
+    private function createItemFromTorrent(Torrent $torrent): Item
+    {
+        $item = new Item();
+        $item
+            ->title($torrent->getName())
+            ->description($torrent->getInfoHash())
+            ->url($this->generateUrl('torrents_show', ['id' => $torrent->getId()]))
+            ->enclosure(
+                $this->magnetGenerator->generate($torrent->getInfoHash(), $torrent->getName()),
+                $torrent->getTotalSize(),
+                self::MIME_TYPE
+            )
+            ->guid($torrent->getInfoHash())
+        ;
+
+        return $item;
+    }
+
+    private function createLastTorrentsQueryBuilder(): QueryBuilder
+    {
+        $qb = $this->repo->createQueryBuilder('t');
+        $qb
+            ->select('t')
+            ->orderBy('t.id', 'DESC');
+
+        return $qb;
+    }
+
+    private function generateUrl(string $route, array $parameters = []): string
+    {
+        return $this->router->generate($route, $parameters, UrlGeneratorInterface::ABSOLUTE_URL);
+    }
+}

src/Security/ApiTokenAuthenticator.php

@@ -36,13 +36,18 @@ class ApiTokenAuthenticator extends AbstractGuardAuthenticator
 
     public function supports(Request $request): bool
     {
-        return $request->headers->has(self::TOKEN_HEADER);
+        // Let's also support cookies and query params for some cases like torrent clients.
+        return $request->headers->has(self::TOKEN_HEADER) ||
+            $request->cookies->has(self::TOKEN_HEADER) ||
+            $request->query->has(self::TOKEN_HEADER);
     }
 
     public function getCredentials(Request $request)
     {
         return [
-            'token' => $request->headers->get(self::TOKEN_HEADER),
+            'token' => $request->headers->get(self::TOKEN_HEADER) ?:
+                $request->cookies->get(self::TOKEN_HEADER) ?:
+                $request->query->get(self::TOKEN_HEADER),
         ];
     }
 
@@ -101,7 +106,12 @@ class ApiTokenAuthenticator extends AbstractGuardAuthenticator
 
     public function createAuthenticatedToken(UserInterface $user, $providerKey)
     {
-        $tokenKey = $this->requestStack->getCurrentRequest()->headers->get(self::TOKEN_HEADER);
+        $request = $this->requestStack->getCurrentRequest();
+
+        $tokenKey = $request->headers->get(self::TOKEN_HEADER) ?:
+            $request->cookies->get(self::TOKEN_HEADER) ?:
+            $request->query->get(self::TOKEN_HEADER)
+        ;
 
         return new AuthenticatedApiToken(
             $user,

src/Security/Token/AuthenticatedApiToken.php

@@ -4,9 +4,10 @@ namespace App\Security\Token;
 
 use App\Entity\User;
 use Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken;
+use Symfony\Component\Security\Guard\Token\GuardTokenInterface;
 
 /** This token stores ApiToken key even after eraseCredentials() called */
-class AuthenticatedApiToken extends PreAuthenticatedToken
+class AuthenticatedApiToken extends PreAuthenticatedToken implements GuardTokenInterface
 {
     /** @var string|null This token is stored only for this request and will not be erased by eraseCredentials() or serialized */
     private $tokenKey;

symfony.lock

@@ -210,6 +210,9 @@
             "config/packages/sentry.yaml"
         ]
     },
+    "suin/php-rss-writer": {
+        "version": "1.6.0"
+    },
     "symfony/cache": {
         "version": "v4.1.0"
     },