Add compare function between snipsContents

src/Controller/SnipContentController.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Controller;
+
+use App\Entity\SnipContent;
+use App\Security\Voter\SnipVoter;
+use App\Service\SnipContent\MyersDiff;
+use App\Service\SnipContent\SnipContentService;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route('/content', name: 'content')]
+class SnipContentController extends AbstractController
+{
+    public function __construct(
+        private readonly SnipContentService $contentService,
+    ) {}
+
+    #[Route('/compare/{to}/{from}', name: '_compare')]
+    public function compare(SnipContent $to, ?SnipContent $from = null): Response
+    {
+        $this->denyAccessUnlessGranted(SnipVoter::VIEW, $to->getSnip());
+
+        if ($from === null) {
+            $from = $to->getParent();
+        }
+
+        $diff = MyersDiff::buildDiffLines(
+            $this->contentService->rebuildText($from),
+            $this->contentService->rebuildText($to),
+        );
+
+        dump($diff);
+
+        return $this->render('content/compare.html.twig', [
+            'snip' => $to->getSnip(),
+            'diff' => $diff,
+        ]);
+    }
+}