Add src/middleware.ts

src/middleware.ts

@@ -0,0 +1,38 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { i18n } from './lib/i18nConfig';
+
+const PUBLIC_FILE_REGEX = /\.(.*)$/;
+
+export function middleware(request: NextRequest) {
+  const locale = request.cookies.get('NEXT_LOCALE')?.value || i18n.defaultLocale;
+  const { pathname } = request.nextUrl;
+
+  // Skip internal Next.js paths and static files
+  if (
+    pathname.startsWith('/_next') ||
+    pathname.startsWith('/api') ||
+    PUBLIC_FILE_REGEX.test(pathname)
+  ) {
+    return;
+  }
+
+  // Check if there is any supported locale in the pathname
+  const pathnameHasLocale = i18n.locales.some(
+    (loc) => pathname.startsWith(`/${loc}/`) || pathname === `/${loc}`
+  );
+
+  if (pathnameHasLocale) {
+    return NextResponse.next();
+  }
+
+  // Rewrite to include the default locale if no locale is present
+  request.nextUrl.pathname = `/${locale}${pathname}`;
+  return NextResponse.redirect(request.nextUrl);
+}
+
+export const config = {
+  matcher: [
+    '/((?!api|_next/static|_next/image|favicon.ico).*)',
+    '/',
+  ],
+};