Add admin site settings sections and locale defaults

middleware.ts

@@ -14,9 +14,37 @@ import {
   isLegacyAdminPath,
   toInternalAdminPath,
 } from "./lib/admin-routing";
+import { getLocalizedPathWithDefault } from "./lib/locale";
 
 const intlMiddleware = createMiddleware(routing);
 
+async function getConfiguredDefaultLocale(request: NextRequest) {
+  try {
+    const response = await fetch(new URL("/api/site/default-locale", request.url), {
+      headers: {
+        "x-middleware-request": "1",
+      },
+      cache: "no-store",
+    });
+
+    if (!response.ok) {
+      return routing.defaultLocale;
+    }
+
+    const data = await response.json() as { defaultLocale?: string };
+
+    return data.defaultLocale === "ar" || data.defaultLocale === "en" || data.defaultLocale === "de"
+      ? data.defaultLocale
+      : routing.defaultLocale;
+  } catch {
+    return routing.defaultLocale;
+  }
+}
+
+function hasLocalePrefix(pathname: string) {
+  return routing.locales.some((locale) => pathname === `/${locale}` || pathname.startsWith(`/${locale}/`));
+}
+
 function getAdminBasicAuthUser(): string {
   return process.env.ADMIN_BASIC_AUTH_USER ?? "";
 }
@@ -111,7 +139,28 @@ export default async function middleware(request: NextRequest) {
     return response;
   }
 
-  if (pathname === "/de" || pathname.startsWith("/de/")) {
+  const configuredDefaultLocale = await getConfiguredDefaultLocale(request);
+
+  if (
+    configuredDefaultLocale !== routing.defaultLocale &&
+    (pathname === "/de" || pathname.startsWith("/de/"))
+  ) {
+    return NextResponse.next();
+  }
+
+  if (
+    configuredDefaultLocale !== routing.defaultLocale &&
+    !hasLocalePrefix(pathname)
+  ) {
+    const redirectUrl = request.nextUrl.clone();
+    redirectUrl.pathname = getLocalizedPathWithDefault(configuredDefaultLocale, pathname, routing.defaultLocale);
+    return NextResponse.redirect(redirectUrl, 307);
+  }
+
+  if (
+    configuredDefaultLocale === routing.defaultLocale &&
+    (pathname === "/de" || pathname.startsWith("/de/"))
+  ) {
     const redirectUrl = request.nextUrl.clone();
     const nextPath = pathname.slice(3) || "/";
     redirectUrl.pathname = nextPath;