fix Analyse

backend/middleware.js

@@ -0,0 +1,28 @@
+import jwt from 'jsonwebtoken';
+import { getUserByUsername } from './db.js';
+
+const JWT_SECRET = process.env.JWT_SECRET || 'tiktok-rezepte-secret-key-change-in-production';
+
+export function authMiddleware(req, res, next) {
+  const authHeader = req.headers.authorization;
+  if (!authHeader || !authHeader.startsWith('Bearer ')) {
+    return res.status(401).json({ error: 'Nicht authentifiziert' });
+  }
+  try {
+    const token = authHeader.split(' ')[1];
+    const decoded = jwt.verify(token, JWT_SECRET);
+    const user = getUserByUsername(decoded.username);
+    if (!user) return res.status(401).json({ error: 'Benutzer nicht gefunden' });
+    req.user = user;
+    next();
+  } catch {
+    res.status(401).json({ error: 'Ungültiges Token' });
+  }
+}
+
+export function adminMiddleware(req, res, next) {
+  if (!req.user || !req.user.is_admin) {
+    return res.status(403).json({ error: 'Keine Berechtigung' });
+  }
+  next();
+}