auto-claude: subtask-1-2 - Add authentication check to middleware

src/middleware.ts

@@ -1,12 +1,40 @@
 import createMiddleware from 'next-intl/middleware';
 import { locales, defaultLocale } from './i18n/config';
+import { createClient } from '@/lib/supabase/middleware';
+import { NextRequest, NextResponse } from 'next/server';
 
-export default createMiddleware({
+const intlMiddleware = createMiddleware({
   locales,
   defaultLocale,
   localePrefix: 'always',
 });
 
+export async function middleware(request: NextRequest) {
+  // Check if the request is for a protected dashboard route
+  const pathname = request.nextUrl.pathname;
+  const isDashboardRoute = pathname.match(/^\/(de|en|sr)\/dashboard/);
+
+  if (isDashboardRoute) {
+    // Create Supabase client and check authentication
+    const { supabase, response } = await createClient(request);
+    const { data: { user } } = await supabase.auth.getUser();
+
+    // If not authenticated, redirect to login page with locale preserved
+    if (!user) {
+      const locale = pathname.split('/')[1];
+      const loginUrl = new URL(`/${locale}/login`, request.url);
+      loginUrl.searchParams.set('returnUrl', pathname);
+      return NextResponse.redirect(loginUrl);
+    }
+
+    // User is authenticated, continue with the response from Supabase client
+    return response;
+  }
+
+  // For non-dashboard routes, use the intl middleware
+  return intlMiddleware(request);
+}
+
 export const config = {
   matcher: [
     '/',