middleware.ts

import { NextResponse } from "next/server";
import { abby } from "@lib/ab-testing";

export const config = {
  matcher: ["/home", "/marketing"],
};

export default abby.withAbbyEdge((req) => {
  const { pathname } = req.nextUrl;
  if (pathname === "/home") {
    const [bucket, setCookie] = abby.getABTestValue("Home", req);
    const url = req.nextUrl.clone();
    url.pathname = `/home/${bucket}`;
    const res = NextResponse.rewrite(url);
    setCookie(res);
    return res;
  }

  if (pathname === "/marketing") {
    const [bucket, setCookie] = abby.getABTestValue("Marketing", req);
    const url = req.nextUrl.clone();
    url.pathname = `/marketing/${bucket}`;
    const res = NextResponse.rewrite(url);
    setCookie(res);
    return res;
  }
});