Implement markdown link replacement with snip url

src/Service/SnipParser/Markdown/MarkdownParser.php

@@ -2,14 +2,52 @@
 
 namespace App\Service\SnipParser\Markdown;
 
+use App\Repository\SnipRepository;
 use App\Service\SnipParser\AbstractParser;
+use League\CommonMark\Event\DocumentParsedEvent;
+use League\CommonMark\Extension\CommonMark\Node\Inline\Link;
 use League\CommonMark\GithubFlavoredMarkdownConverter;
+use League\CommonMark\Node\Inline\Text;
+use League\CommonMark\Node\Query;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use Symfony\Component\Routing\RouterInterface;
 
 class MarkdownParser extends AbstractParser
 {
+    public function __construct(
+        #[Autowire(lazy: true)] private readonly RouterInterface $router,
+        #[Autowire(lazy: true)] private readonly SnipRepository  $snipRepo,
+    ) {}
+
     public function safeParseView(string $content): string
     {
         $converter = new GithubFlavoredMarkdownConverter();
+        $converter->getEnvironment()->addEventListener(DocumentParsedEvent::class, $this->documentParsed(...));
         return $converter->convert($content);
     }
+
+    private function documentParsed(DocumentParsedEvent $event): void
+    {
+        $document = $event->getDocument();
+
+        $linkNodes = new Query()
+            ->where(Query::type(Link::class))
+            ->findAll($document);
+
+        foreach ($linkNodes as $linkNode) {
+            $url = $linkNode->getUrl();
+
+            $snip = $this->snipRepo->find($url);
+            if ($snip === null) {
+                continue;
+            }
+            $linkNode->setUrl($this->router->generate('snip_single', [
+                'snip' => $url,
+            ]));
+            $textNode = $linkNode->firstChild();
+            if (!$textNode) {
+                $linkNode->appendChild(new Text($snip));
+            }
+        }
+    }
 }

src/Service/SnipParser/Twig/SnipTwigExtension.php

@@ -25,14 +25,14 @@ class SnipTwigExtension extends AbstractExtension
         ];
     }
 
-    function snipPath(int $id): string
+    private function snipPath(int $id): string
     {
         return $this->router->generate('snip_single', [
             'snip' => $id,
         ]);
     }
 
-    function snipLink(int $id): string
+    private function snipLink(int $id): string
     {
         $snip = $this->snipRepo->find($id);
         if ($snip === null) {