chore: commit remaining workspace changes

app/Services/Academy/AcademyLessonMarkdownRenderer.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\Academy;
+
+use League\CommonMark\Environment\Environment;
+use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
+use League\CommonMark\Extension\GithubFlavoredMarkdownExtension;
+use League\CommonMark\MarkdownConverter;
+
+final class AcademyLessonMarkdownRenderer
+{
+    private ?MarkdownConverter $converter = null;
+
+    public function render(?string $markdown): string
+    {
+        $trimmed = trim((string) $markdown);
+
+        if ($trimmed === '') {
+            return '';
+        }
+
+        return trim((string) $this->converter()->convert($trimmed)->getContent());
+    }
+
+    private function converter(): MarkdownConverter
+    {
+        if ($this->converter instanceof MarkdownConverter) {
+            return $this->converter;
+        }
+
+        $environment = new Environment([
+            'html_input' => 'strip',
+            'allow_unsafe_links' => false,
+        ]);
+        $environment->addExtension(new CommonMarkCoreExtension());
+        $environment->addExtension(new GithubFlavoredMarkdownExtension());
+
+        return $this->converter = new MarkdownConverter($environment);
+    }
+}