middleware.ts

import NextAuth from "next-auth";
import authConfig from "./auth.config";
import {
  AuthRoutes,
  DEFAULT_LOGIN_REDIRECT,
  PublicRoutes,
  apiAuthPrefix,
  authRoutes,
  publicRoutes,
} from "./routes";

const { auth } = NextAuth(authConfig);

export default auth((req) => {
  const { nextUrl } = req;
  const isLoggedIn = !!req.auth;
  const isApiAuthRoute = nextUrl.pathname.startsWith(apiAuthPrefix);
  const isPublicRoute = publicRoutes.includes(nextUrl.pathname as PublicRoutes);
  const isAuthRoute = authRoutes.includes(nextUrl.pathname as AuthRoutes);
  if (isApiAuthRoute) {
    return null;
  }
  if (isAuthRoute) {
    if (isLoggedIn) {
      return Response.redirect(new URL(DEFAULT_LOGIN_REDIRECT, nextUrl));
    }
    return null;
  }
  if (!isLoggedIn && !isPublicRoute) {
    return Response.redirect(new URL(AuthRoutes.LOGIN, nextUrl));
  }
  return null;
});
export const config = {
  matcher: ["/((?!.+\\.[\\w]+$|_next).*)", "/", "/(api|trpc)(.*)"],
};