Implement very basic twig parser

src/Service/SnipContent/SnipContentService.php

@@ -45,8 +45,11 @@ readonly class SnipContentService
         return $this->rebuildText($contentRepo->find($snip->getActiveVersion()));
     }
 
-    public function rebuildText(SnipContent $snipContent): string
+    public function rebuildText(?SnipContent $snipContent): string
     {
+        if ($snipContent === null) {
+            return '';
+        }
         if ($snipContent->getText()) {
             return $snipContent->getText();
         }

src/Service/SnipParser/Twig/TwigParser.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Service\SnipParser\Twig;
+
+use App\Service\SnipParser\AbstractParser;
+use Twig\Environment;
+use Twig\Loader\ArrayLoader;
+
+class TwigParser extends AbstractParser
+{
+    public static function getName(): string
+    {
+        return 'twig';
+    }
+
+    public function parseView(string $content): string
+    {
+        $arrayLoader = new ArrayLoader([
+            'index' => $content,
+        ]);
+        $twig = new Environment($arrayLoader);
+        return $twig->render('index');
+    }
+}