useUser.js

import { useQuery } from 'react-query';
import apis from '../apis';

const useUser = () => useQuery(
  ['user'],
  async () => {
    const createGuestUser = () => ({
      name: '遊客',
      submitComment: () => { /* 導到登入頁面 */ },
    });
    const { data: user } = await apis.getUser();
    return user || createGuestUser();
  }
);

export default useUser;