content: package market.security;
  
  import market.domain.Role;
  import market.domain.UserAccount;
  import market.service.UserAccountService;
  import org.springframework.dao.DataAccessException;
  import org.springframework.security.core.GrantedAuthority;
  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.transaction.annotation.Transactional;
  
  import java.util.ArrayList;
  import java.util.Collection;
  
  /**
   * Реализация сервиса извлечения аккаунта пользователя из БД.
   */
  public class UserDetailsServiceImpl implements UserDetailsService {
  
  	private final UserAccountService userAccountService;
  
  	public UserDetailsServiceImpl(UserAccountService userAccountService) {
  		this.userAccountService = userAccountService;
  	}
  
  	@Override
  	@Transactional
  	public UserDetails loadUserByUsername(String login) throws UsernameNotFoundException, DataAccessException
  	{
  		UserAccount userEntity = userAccountService.findByEmail(login);
  		if (userEntity == null) {
  			throw new UsernameNotFoundException("user not found");
  		}
  		return buildUser(userEntity);
  	}
  
  	private User buildUser(UserAccount account) {
  		String login = account.getEmail();
  		String password = account.getPassword();
  		boolean enabled = account.isActive();
  		boolean accountNonExpired = account.isActive();
  		boolean credentialsNonExpired = account.isActive();
  		boolean accountNonLocked = account.isActive();
  
  		Collection<GrantedAuthority> authorities = new ArrayList<>();
  		for (Role role : account.getRoles()) {
  			authorities.add(new SimpleGrantedAuthority(role.getTitle()));
  		}
  		authorities.add(new SimpleGrantedAuthority("ROLE_USER"));
  
  		User user = new User(login, password, enabled,
  			accountNonExpired, credentialsNonExpired, accountNonLocked, authorities);
  		return user;
  	}
  }
  