Allow going back to a previous commit

src/Controller/HistoryController.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Controller;
+
+use App\Entity\Snip;
+use App\Service\SnipServiceFactory;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Annotation\Route;
+
+#[Route('/history/{snip}', name: 'history')]
+class HistoryController extends AbstractController
+{
+    public function __construct(
+        private readonly SnipServiceFactory $snipServiceFactory,
+    )
+    {
+    }
+
+    #[Route('/', name: '_index')]
+    public function index(Snip $snip): Response
+    {
+        return $this->render('history/index.html.twig', [
+            'snip' => $snip,
+            'commits' => $this->snipServiceFactory->create($snip)->getRepo()->getAllCommits(),
+        ]);
+    }
+
+    #[Route('/set/{commit}', name: '_set')]
+    public function set(Snip $snip, string $commit): Response
+    {
+        $this->snipServiceFactory->create($snip)->getRepo()->checkout($commit);
+        $this->addFlash('success', 'Snip version set to ' . $commit);
+        return $this->redirectToRoute('snip_single', ['snip' => $snip->getId()]);
+    }
+}