Function fetch

design/test/feedback-roundtrip.test.ts:66–115

(req)

  server = Bun.serve({
    port: 0,
    fetch(req) {
      const url = new URL(req.url);

      if (req.method === 'GET' && (url.pathname === '/' || url.pathname === '/index.html')) {
        return new Response(currentHtml, {
          headers: { 'Content-Type': 'text/html; charset=utf-8' },
        });
      }

      if (req.method === 'GET' && url.pathname === '/api/progress') {
        return Response.json({ status: serverState });
      }

      if (req.method === 'POST' && url.pathname === '/api/feedback') {
        return (async () => {
          let body: any;
          try { body = await req.json(); } catch {
            return Response.json({ error: 'Invalid JSON' }, { status: 400 });
          }
          if (typeof body !== 'object' || body === null) {
            return Response.json({ error: 'Expected JSON object' }, { status: 400 });
          }

          const isSubmit = body.regenerated === false;
          const feedbackFile = isSubmit ? 'feedback.json' : 'feedback-pending.json';
          fs.writeFileSync(path.join(tmpDir, feedbackFile), JSON.stringify(body, null, 2));

          if (isSubmit) {
            serverState = 'done';
            return Response.json({ received: true, action: 'submitted' });
          }
          serverState = 'regenerating';
          return Response.json({ received: true, action: 'regenerate' });
        })();
      }

      if (req.method === 'POST' && url.pathname === '/api/reload') {
        return (async () => {
          const body = await req.json();
          if (body.html && fs.existsSync(body.html)) {
            currentHtml = fs.readFileSync(body.html, 'utf-8');
            serverState = 'serving';
            return Response.json({ reloaded: true });
          }
          return Response.json({ error: 'Not found' }, { status: 400 });
        })();
      }

      return new Response('Not found', { status: 404 });
    },
  });

  baseUrl = `http://localhost:${server.port}`;