src/main/java/com/blog/web/security/CustomUserDetailsService.java


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package com.blog.web.security;

import com.blog.web.models.UserEntity;
import com.blog.web.repository.UserRepository;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
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.stream.Collectors;

@Service
public class CustomUserDetailsService implements UserDetailsService {
    private UserRepository userRepository;

    public CustomUserDetailsService(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        UserEntity user = userRepository.findFirstByUsername(username);
        if(user != null) {
            User authUser = new User(
                    user.getEmail(),
                    user.getPassword(),
                    user.getRoles().stream().map((role) -> new SimpleGrantedAuthority(role.getName()))
                            .collect(Collectors.toList())
            );
            return authUser;
        }
        else {
            throw new UsernameNotFoundException("Invalid username or password");
        }
    }
}