CustomUserDetailsService.java

package com.newbit.auth.service;

import com.newbit.auth.model.CustomUser;
import com.newbit.user.entity.User;
import com.newbit.user.repository.UserRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import java.util.Collections;

@Service
@RequiredArgsConstructor
public class CustomUserDetailsService implements UserDetailsService {

    private final UserRepository userRepository;

    @Override
    public UserDetails loadUserByUsername(String email) throws UsernameNotFoundException {
        User user = userRepository.findByEmail(email)
                .orElseThrow(() -> new UsernameNotFoundException("유저 찾지 못함"));

        // 권한 enum을 "ROLE_" prefix와 함께 Spring Security 권한 객체로 변환
        String role = "ROLE_" + user.getAuthority().name();

        return CustomUser.builder()
                .userId(user.getUserId())
                .email(user.getEmail())
                .password(user.getPassword())
                .authorities(Collections.singleton(new SimpleGrantedAuthority(role)))
                .build();
    }
}