Reactive-Resume/apps/client/src/router/loaders/auth.ts

import type { UserDto } from "@reactive-resume/dto";
import { authResponseSchema } from "@reactive-resume/dto";
import type { LoaderFunction } from "react-router";
import { redirect } from "react-router";

import { USER_KEY } from "@/client/constants/query-keys";
import { queryClient } from "@/client/libs/query-client";
import { fetchUser } from "@/client/services/user";
import { useAuthStore } from "@/client/stores/auth";

export const authLoader: LoaderFunction<UserDto> = async ({ request }) => {
  const status = new URL(request.url).searchParams.get("status");

  const { success } = authResponseSchema.pick({ status: true }).safeParse({ status });

  if (!success) return redirect("/auth/login");

  if (status === "2fa_required") {
    return redirect("/auth/verify-otp");
  }

  const user = await queryClient.fetchQuery({
    queryKey: [USER_KEY],
    queryFn: fetchUser,
  });

  if (!user) {
    return redirect("/auth/login");
  }

  if (status === "authenticated") {
    useAuthStore.setState({ user });

    return redirect("/dashboard");
  }
};