manoon-headless/middleware.ts

import createMiddleware from "next-intl/middleware";
import { NextResponse } from "next/server";
import type { NextRequest } from "next/server";
import { routing } from "./src/i18n/routing";

export default function middleware(request: NextRequest) {
  const pathname = request.nextUrl.pathname;

  const hasLocalePrefix = routing.locales.some(
    (locale) => pathname === `/${locale}` || pathname.startsWith(`/${locale}/`)
  );

  if (hasLocalePrefix) {
    const intlMiddleware = createMiddleware({
      ...routing,
    });
    return intlMiddleware(request);
  }

  if (pathname === "/" || pathname === "") {
    const intlMiddleware = createMiddleware({
      ...routing,
      localeDetection: true,
    });
    return intlMiddleware(request);
  }

  const oldSerbianPaths = ["products", "about", "contact", "checkout"];
  const isOldSerbianPath = oldSerbianPaths.some(
    (path) => pathname === `/${path}` || pathname.startsWith(`/${path}/`)
  );

  if (isOldSerbianPath) {
    const newPathname = `/sr${pathname}`;
    const url = request.nextUrl.clone();
    url.pathname = newPathname;
    return NextResponse.redirect(url, 301);
  }

  const intlMiddleware = createMiddleware({
    ...routing,
  });
  return intlMiddleware(request);
}

export const config = {
  matcher: [
    "/",
    "/(sr|en|de|fr)/:path*",
    "/((?!api|_next|_vercel|.*\\..*).*)",
  ],
};