middleware.ts

import { NextRequest, NextResponse } from "next/server";
import { ACCESS_CODES } from "./app/api/access";
import md5 from "spark-md5";

export const config = {
  matcher: ["/api/chat", "/api/chat-stream"],
};

export function middleware(req: NextRequest, res: NextResponse) {
  const accessCode = req.headers.get("access-code");
  const token = req.headers.get("token");
  const hashedCode = md5.hash(accessCode ?? "").trim();

  console.log("[Auth] allowed hashed codes: ", [...ACCESS_CODES]);
  console.log("[Auth] got access code:", accessCode);
  console.log("[Auth] hashed access code:", hashedCode);

  if (ACCESS_CODES.size > 0 && !ACCESS_CODES.has(hashedCode) && !token) {
    return NextResponse.json(
      {
        needAccessCode: true,
        hint: "Please go settings page and fill your access code.",
      },
      {
        status: 401,
      }
    );
  }

  return NextResponse.next();
}