pasargad/middleware.ts

import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';

const PUBLIC_FILE = /\.(.*)$/;
const locales = ['en', 'fa'];
const defaultLocale = 'en';

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

  // Ignore public files and API routes
  if (
    pathname.startsWith('/api') ||
    PUBLIC_FILE.test(pathname)
  ) {
    return NextResponse.next();
  }

  // Check if the pathname already includes a locale
  const pathnameIsMissingLocale = locales.every(
    (locale) => !pathname.startsWith(`/${locale}/`) && pathname !== `/${locale}`
  );

  if (pathnameIsMissingLocale) {
    // Redirect to default locale
    return NextResponse.redirect(
      new URL(`/${defaultLocale}${pathname}`, request.url)
    );
  }

  return NextResponse.next();
}

export const config = {
  matcher: [
    /*
      Match all request paths except for:
      - static files (/_next/static/)
      - API routes (/api/)
    */
    '/((?!_next/static|_next/image|favicon.ico|api).*)',
  ],
};