Next.js Proxy Authentication Guard

// proxy.ts

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

export function proxy(request: NextRequest) {
  const sessionId = request.cookies.get('session')?.value;

  if (!sessionId) {
    const signInUrl = new URL('/signin', request.url);

    signInUrl.searchParams.set(
      'next',
      request.nextUrl.pathname,
    );

    return NextResponse.redirect(signInUrl);
  }

  return NextResponse.next();
}

export const config = {
  matcher: [
    '/dashboard/:path*',
    '/settings/:path*',
  ],
};