dev.to-clone/src/hooks/useFollowUser.js

import { useState } from 'react';
import { useDispatch } from 'react-redux';
import { useNavigate } from 'react-router-dom';
import { useAuth } from '../context/auth';
import { updateProfileData } from '../lib/api';
import { setLoginAlert } from '../store/loginAlert';

const useFollowUser = (profileData, userId) => {
   const user = useAuth();
   const navigate = useNavigate();
   const dispatch = useDispatch();

   const [loading, setLoading] = useState(false);

   const handleClickFollow = () => {
      if (!user) {
         dispatch(setLoginAlert(true));
         return;
      }

      if (profileData?.id === userId) {
         navigate('/customize-profile');
      } else {
         setLoading(true);
         const followers = profileData.followers || [];
         const transformedFollowers = followers.includes(userId)
            ? followers.filter((id) => id !== userId)
            : [...followers, userId];

         updateProfileData({ followers: transformedFollowers }, profileData.id)
            .then((_) => {
               setLoading(false);
               // console.log('followed');
            })
            .catch((err) => {
               setLoading(false);
               console.log(err);
            });
      }
   };

   return { handleClickFollow, loading };
};

export default useFollowUser;