creates application

backend/src/middleware/auth.ts

@@ -0,0 +1,43 @@
+import { Request, Response, NextFunction } from 'express';
+import { prisma } from '../prisma/client';
+import type { AuthenticatedRequest, AuthenticatedUser } from '../types';
+
+export function requireAuth(
+  req: AuthenticatedRequest,
+  res: Response,
+  next: NextFunction
+): void {
+  if (!req.session?.user) {
+    res.status(401).json({ error: 'Unauthorized' });
+    return;
+  }
+  
+  req.user = req.session.user as AuthenticatedUser;
+  next();
+}
+
+export function optionalAuth(
+  req: AuthenticatedRequest,
+  res: Response,
+  next: NextFunction
+): void {
+  if (req.session?.user) {
+    req.user = req.session.user as AuthenticatedUser;
+  }
+  next();
+}
+
+export async function syncUser(user: AuthenticatedUser): Promise<void> {
+  await prisma.user.upsert({
+    where: { id: user.id },
+    update: {
+      username: user.username,
+      email: user.email,
+    },
+    create: {
+      id: user.id,
+      username: user.username,
+      email: user.email,
+    },
+  });
+}