import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

import ...Role;
import ...model.User;
import ...AclService;

@Slf4j
public class UserDetailsServiceImpl implements UserDetailsService {
    @Setter
    private AclService aclService;

    public UserDetails loadUserByUsername(String username) {
        log.debug("Find user: {}", username);
        User user = aclService.findUserByLogin(username);
        if (user == null) {
            throw new UsernameNotFoundException("User not found");
        }
        List<Role> roles = aclService.getUserRoles(user);
        if (roles.size() == 0) {
            // if user has no roles - he is 'Anonym'. No other actions needed 
            roles.toArray(new Role[] {new Role("Anonym")});
        }
        return new UserDetailsImpl(user, roles.toArray(new Role[] {}));
    }
}