AuthService.java
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package com.ecommerce.user.service;
import com.ecommerce.user.model.*;
import com.ecommerce.user.repository.UserRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.time.LocalDateTime;
@Service
@RequiredArgsConstructor
public class AuthService {
    
    private final UserRepository userRepository;
    private final PasswordEncoder passwordEncoder;
    private final JwtService jwtService;
    private final RedisService redisService;
    
    @Transactional
    public AuthResponse register(RegisterRequest request) {
        // 检查用户是否已存在
        if (userRepository.findByEmail(request.getEmail()).isPresent()) {
            throw new RuntimeException("Email already exists");
        }
        
        if (userRepository.findByUsername(request.getUsername()).isPresent()) {
            throw new RuntimeException("Username already exists");
        }
        
        // 创建新用户
        User user = new User();
        user.setUsername(request.getUsername());
        user.setEmail(request.getEmail());
        user.setPasswordHash(passwordEncoder.encode(request.getPassword()));
        user.setFirstName(request.getFirstName());
        user.setLastName(request.getLastName());
        user.setPhone(request.getPhone());
        
        User savedUser = userRepository.save(user);
        
        // 生成 JWT token
        String accessToken = jwtService.generateAccessToken(savedUser);
        String refreshToken = jwtService.generateRefreshToken(savedUser);
        
        return AuthResponse.builder()
                .accessToken(accessToken)
                .refreshToken(refreshToken)
                .userId(savedUser.getId())
                .username(savedUser.getUsername())
                .email(savedUser.getEmail())
                .build();
    }
    
    public AuthResponse login(LoginRequest request) {
        User user = userRepository.findByEmail(request.getEmail())
                .orElseThrow(() -> new RuntimeException("User not found"));
        
        if (!passwordEncoder.matches(request.getPassword(), user.getPasswordHash())) {
            throw new RuntimeException("Invalid password");
        }
        
        // 更新最后登录时间
        user.setLastLoginAt(LocalDateTime.now());
        userRepository.save(user);
        
        String accessToken = jwtService.generateAccessToken(user);
        String refreshToken = jwtService.generateRefreshToken(user);
        
        return AuthResponse.builder()
                .accessToken(accessToken)
                .refreshToken(refreshToken)
                .userId(user.getId())
                .username(user.getUsername())
                .email(user.getEmail())
                .build();
    }
    
    public AuthResponse refreshToken(String refreshToken) {
        String token = refreshToken.replace("Bearer ", "");
        String username = jwtService.extractUsername(token);
        
        User user = userRepository.findByUsername(username)
                .orElseThrow(() -> new RuntimeException("User not found"));
        
        if (!jwtService.validateToken(token, user)) {
            throw new RuntimeException("Invalid refresh token");
        }
        
        String newAccessToken = jwtService.generateAccessToken(user);
        String newRefreshToken = jwtService.generateRefreshToken(user);
        
        return AuthResponse.builder()
                .accessToken(newAccessToken)
                .refreshToken(newRefreshToken)
                .userId(user.getId())
                .username(user.getUsername())
                .email(user.getEmail())
                .build();
    }
    
    public void logout(String token) {
        String accessToken = token.replace("Bearer ", "");
        long expiration = jwtService.getExpirationFromToken(accessToken);
        redisService.blacklistToken(accessToken, expiration);
    }
}