Initial commit - Stand 26.04.2026

backend/middleware/auth.js

@@ -0,0 +1,47 @@
+const jwt = require('jsonwebtoken');
+
+const JWT_SECRET = process.env.JWT_SECRET || 'dev-secret-change-in-production';
+
+// Middleware: Prüft ob User eingeloggt ist
+function authRequired(req, res, next) {
+  try {
+    const authHeader = req.headers.authorization;
+    
+    if (!authHeader || !authHeader.startsWith('Bearer ')) {
+      return res.status(401).json({ error: 'Kein Token vorhanden' });
+    }
+
+    const token = authHeader.split(' ')[1];
+    const decoded = jwt.verify(token, JWT_SECRET);
+
+    req.user = decoded;
+    next();
+  } catch (error) {
+    if (error.name === 'JsonWebTokenError') {
+      return res.status(401).json({ error: 'Token ungültig' });
+    }
+    if (error.name === 'TokenExpiredError') {
+      return res.status(401).json({ error: 'Token abgelaufen' });
+    }
+    console.error('Auth Middleware Error:', error);
+    return res.status(500).json({ error: 'Server-Fehler' });
+  }
+}
+
+// Middleware: Prüft ob User Admin ist
+function adminRequired(req, res, next) {
+  if (!req.user) {
+    return res.status(401).json({ error: 'Nicht eingeloggt' });
+  }
+
+  if (req.user.role !== 'admin') {
+    return res.status(403).json({ error: 'Zugriff verweigert. Admin-Rechte erforderlich.' });
+  }
+
+  next();
+}
+
+module.exports = {
+  authRequired,
+  adminRequired
+};