454 lines
13 KiB
Go
454 lines
13 KiB
Go
// Package service 提供 auth 模块的核心业务逻辑
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package service
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import (
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"context"
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"errors"
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"github.com/echochat/backend/app/auth/dao"
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"github.com/echochat/backend/app/auth/model"
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"github.com/echochat/backend/app/constants"
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"github.com/echochat/backend/app/dto"
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"github.com/echochat/backend/config"
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"github.com/echochat/backend/pkg/logs"
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"github.com/echochat/backend/pkg/utils"
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"go.uber.org/zap"
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"gorm.io/gorm"
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)
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var (
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ErrUserAlreadyExists = errors.New("用户名或邮箱已被注册")
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ErrUserNotFound = errors.New("用户不存在")
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ErrPasswordWrong = errors.New("密码错误")
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ErrUserDisabled = errors.New("账号已被禁用")
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ErrUserDeleted = errors.New("账号已注销")
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ErrNotAdmin = errors.New("该账号无管理员权限")
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ErrRefreshTokenType = errors.New("无效的 Refresh Token 类型")
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)
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// AuthService 认证服务，处理注册、登录、Token 管理、个人信息等业务逻辑
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type AuthService struct {
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userDAO *dao.UserDAO
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roleDAO *dao.RoleDAO
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jwtCfg *config.JWTConfig
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tokenStore *TokenStore
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}
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// NewAuthService 创建认证服务实例
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func NewAuthService(userDAO *dao.UserDAO, roleDAO *dao.RoleDAO, jwtCfg *config.JWTConfig, tokenStore *TokenStore) *AuthService {
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return &AuthService{
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userDAO: userDAO,
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roleDAO: roleDAO,
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jwtCfg: jwtCfg,
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tokenStore: tokenStore,
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}
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}
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// Register 用户注册（前台用户端专用，clientType 固定为 frontend）
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// 流程：检查用户名/邮箱是否重复 → 加密密码 → 创建用户 → 分配默认角色 → 生成 Token
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func (s *AuthService) Register(ctx context.Context, req *dto.RegisterRequest) (*dto.LoginResponse, error) {
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funcName := "service.auth_service.Register"
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logs.Info(ctx, funcName, "开始处理注册",
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zap.String("username", req.Username),
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zap.String("email", logs.MaskEmail(req.Email)),
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)
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var err error
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defer func() {
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if err != nil {
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logs.Error(ctx, funcName, "注册处理失败",
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zap.String("username", req.Username),
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zap.Error(err),
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)
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}
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}()
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// 检查用户名是否已存在
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existing, _ := s.userDAO.FindByUsername(ctx, req.Username)
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if existing != nil {
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err = ErrUserAlreadyExists
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return nil, err
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}
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// 检查邮箱是否已存在
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existing, _ = s.userDAO.FindByEmail(ctx, req.Email)
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if existing != nil {
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err = ErrUserAlreadyExists
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return nil, err
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}
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// 加密密码
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hashedPassword, hashErr := utils.HashPassword(req.Password)
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if hashErr != nil {
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err = hashErr
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return nil, err
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}
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// 创建用户
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nickname := req.Nickname
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if nickname == "" {
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nickname = req.Username
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}
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user := &model.User{
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Username: req.Username,
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Email: req.Email,
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PasswordHash: hashedPassword,
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Nickname: nickname,
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Status: constants.UserStatusActive,
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}
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if err = s.userDAO.Create(ctx, user); err != nil {
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return nil, err
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}
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// 分配默认角色（普通用户）
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defaultRole, roleErr := s.roleDAO.FindByCode(ctx, constants.RoleUser)
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if roleErr != nil {
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logs.Warn(ctx, funcName, "查找默认角色失败，跳过角色分配", zap.Error(roleErr))
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} else {
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if assignErr := s.roleDAO.AssignRole(ctx, user.ID, defaultRole.ID); assignErr != nil {
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logs.Warn(ctx, funcName, "分配默认角色失败", zap.Error(assignErr))
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}
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}
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// 获取角色列表并生成 Token（注册只有前台，clientType 为 frontend）
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roles, _ := s.roleDAO.GetUserRoleCodes(ctx, user.ID)
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resp, err := s.buildLoginResponse(ctx, user, roles, constants.ClientTypeFrontend)
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if err != nil {
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return nil, err
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}
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logs.Info(ctx, funcName, "注册成功", zap.Int64("user_id", user.ID))
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return resp, nil
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}
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// Login 用户登录
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// 流程：查找用户 → 校验密码 → 检查账号状态 → 更新登录信息 → 生成 Token
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// clientType 区分前台（frontend）和管理端（admin），Token 在 Redis 中隔离存储
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func (s *AuthService) Login(ctx context.Context, req *dto.LoginRequest, clientIP, clientType string) (*dto.LoginResponse, error) {
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funcName := "service.auth_service.Login"
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logs.Info(ctx, funcName, "开始处理登录",
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zap.String("account", req.Account),
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)
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var err error
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defer func() {
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if err != nil {
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logs.Error(ctx, funcName, "登录处理失败",
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zap.String("account", req.Account),
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zap.Error(err),
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)
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}
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}()
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// 按用户名或邮箱查找用户（用户不存在时统一返回密码错误，防止枚举攻击）
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user, findErr := s.userDAO.FindByAccount(ctx, req.Account)
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if findErr != nil {
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if errors.Is(findErr, gorm.ErrRecordNotFound) {
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err = ErrPasswordWrong
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} else {
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err = findErr
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}
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return nil, err
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}
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// 校验密码
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if !utils.CheckPassword(req.Password, user.PasswordHash) {
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err = ErrPasswordWrong
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return nil, err
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}
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// 检查账号状态
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if err = s.checkUserStatus(user.Status); err != nil {
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return nil, err
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}
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// 更新最后登录信息
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_ = s.userDAO.UpdateLastLogin(ctx, user.ID, clientIP)
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// 获取角色列表并生成 Token（同时存入 Redis，按 clientType 隔离）
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roles, _ := s.roleDAO.GetUserRoleCodes(ctx, user.ID)
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resp, err := s.buildLoginResponse(ctx, user, roles, clientType)
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if err != nil {
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return nil, err
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}
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logs.Info(ctx, funcName, "登录成功",
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zap.Int64("user_id", user.ID),
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zap.String("username", user.Username),
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zap.String("client_type", clientType),
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)
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return resp, nil
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}
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func (s *AuthService) BuildLoginResponseForUser(ctx context.Context, user *model.User, clientIP, clientType string) (*dto.LoginResponse, error) {
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if user == nil {
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return nil, ErrUserNotFound
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}
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if err := s.checkUserStatus(user.Status); err != nil {
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return nil, err
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}
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_ = s.userDAO.UpdateLastLogin(ctx, user.ID, clientIP)
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roles, _ := s.roleDAO.GetUserRoleCodes(ctx, user.ID)
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return s.buildLoginResponse(ctx, user, roles, clientType)
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}
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// AdminLogin 管理后台登录
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// 与普通登录相同，但额外检查用户是否拥有 admin 或 super_admin 角色
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// clientType 固定为 constants.ClientTypeAdmin
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func (s *AuthService) AdminLogin(ctx context.Context, req *dto.LoginRequest, clientIP string) (*dto.LoginResponse, error) {
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funcName := "service.auth_service.AdminLogin"
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logs.Info(ctx, funcName, "开始处理管理员登录",
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zap.String("account", req.Account),
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)
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resp, err := s.Login(ctx, req, clientIP, constants.ClientTypeAdmin)
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if err != nil {
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return nil, err
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}
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// 检查是否拥有管理员角色
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hasAdmin := false
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for _, role := range resp.User.Roles {
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if role == constants.RoleAdmin || role == constants.RoleSuperAdmin {
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hasAdmin = true
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break
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}
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}
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if !hasAdmin {
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logs.Warn(ctx, funcName, "非管理员尝试后台登录",
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zap.String("account", req.Account),
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)
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return nil, ErrNotAdmin
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}
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logs.Info(ctx, funcName, "管理员登录成功",
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zap.String("account", req.Account),
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)
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return resp, nil
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}
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// RefreshToken 刷新 Access Token
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// 验证 Refresh Token 有效性后，重新生成一对新的 Token
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func (s *AuthService) RefreshToken(ctx context.Context, refreshToken string) (*dto.LoginResponse, error) {
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funcName := "service.auth_service.RefreshToken"
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// 解析 Refresh Token
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claims, err := utils.ParseToken(s.jwtCfg, refreshToken)
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if err != nil {
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logs.Warn(ctx, funcName, "Refresh Token 解析失败", zap.Error(err))
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return nil, err
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}
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// 验证 Token 类型
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if claims.Subject != "refresh" {
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return nil, ErrRefreshTokenType
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}
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// 从 claims 中获取 clientType（前台 / 管理端）
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clientType := claims.ClientType
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if clientType == "" {
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clientType = constants.ClientTypeFrontend
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}
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// 验证 Refresh Token 是否与 Redis 中存储的一致
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if !s.tokenStore.ValidateRefreshToken(ctx, claims.UserID, clientType, refreshToken) {
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logs.Warn(ctx, funcName, "Refresh Token 已失效（不在 Redis 中）",
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zap.Int64("user_id", claims.UserID),
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zap.String("client_type", clientType),
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)
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return nil, ErrRefreshTokenType
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}
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// 查找用户（确保用户仍然有效）
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user, err := s.userDAO.FindByID(ctx, claims.UserID)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrUserNotFound
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}
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return nil, err
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}
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if err = s.checkUserStatus(user.Status); err != nil {
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return nil, err
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}
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// 获取角色并生成新 Token（同时存入 Redis 覆盖旧 Token，保持 clientType 不变）
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roles, _ := s.roleDAO.GetUserRoleCodes(ctx, user.ID)
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resp, err := s.buildLoginResponse(ctx, user, roles, clientType)
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if err != nil {
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return nil, err
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}
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logs.Info(ctx, funcName, "Token 刷新成功",
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zap.Int64("user_id", user.ID),
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zap.String("client_type", clientType),
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)
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return resp, nil
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}
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// Logout 用户登出
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// 从 Redis 中删除指定 clientType 下该用户的 Token（前台登出不影响管理端）
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func (s *AuthService) Logout(ctx context.Context, userID int64, clientType string) error {
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funcName := "service.auth_service.Logout"
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logs.Info(ctx, funcName, "用户登出",
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zap.Int64("user_id", userID),
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zap.String("client_type", clientType),
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)
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return s.tokenStore.RemoveTokens(ctx, userID, clientType)
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}
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// ValidateAccessToken 校验 Access Token 是否在 Redis 中有效
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// 供 JWT 中间件调用，实现有状态 JWT 验证，按 clientType 隔离校验
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func (s *AuthService) ValidateAccessToken(ctx context.Context, userID int64, clientType, token string) bool {
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return s.tokenStore.ValidateAccessToken(ctx, userID, clientType, token)
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}
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// GetProfile 获取用户个人信息
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func (s *AuthService) GetProfile(ctx context.Context, userID int64) (*dto.UserInfo, error) {
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funcName := "service.auth_service.GetProfile"
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logs.Debug(ctx, funcName, "获取用户信息", zap.Int64("user_id", userID))
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user, err := s.userDAO.FindByID(ctx, userID)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrUserNotFound
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}
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return nil, err
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}
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roles, _ := s.roleDAO.GetUserRoleCodes(ctx, user.ID)
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return s.buildUserInfo(user, roles), nil
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}
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// UpdateProfile 更新用户个人资料
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func (s *AuthService) UpdateProfile(ctx context.Context, userID int64, req *dto.UpdateProfileRequest) (*dto.UserInfo, error) {
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funcName := "service.auth_service.UpdateProfile"
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logs.Info(ctx, funcName, "更新用户资料", zap.Int64("user_id", userID))
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user, err := s.userDAO.FindByID(ctx, userID)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrUserNotFound
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}
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return nil, err
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}
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if req.Nickname != "" {
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user.Nickname = req.Nickname
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}
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if req.Avatar != "" {
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user.Avatar = req.Avatar
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}
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if req.Gender != nil {
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user.Gender = *req.Gender
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}
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if req.Phone != "" {
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user.Phone = &req.Phone
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}
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if err = s.userDAO.Update(ctx, user); err != nil {
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return nil, err
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}
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roles, _ := s.roleDAO.GetUserRoleCodes(ctx, user.ID)
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logs.Info(ctx, funcName, "用户资料更新成功", zap.Int64("user_id", userID))
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return s.buildUserInfo(user, roles), nil
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}
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// ChangePassword 修改密码
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func (s *AuthService) ChangePassword(ctx context.Context, userID int64, req *dto.ChangePasswordRequest) error {
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funcName := "service.auth_service.ChangePassword"
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logs.Info(ctx, funcName, "修改密码", zap.Int64("user_id", userID))
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user, err := s.userDAO.FindByID(ctx, userID)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return ErrUserNotFound
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}
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return err
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}
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// 校验旧密码
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if !utils.CheckPassword(req.OldPassword, user.PasswordHash) {
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return ErrPasswordWrong
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}
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// 加密新密码
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hashedPassword, err := utils.HashPassword(req.NewPassword)
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if err != nil {
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return err
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}
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user.PasswordHash = hashedPassword
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if err = s.userDAO.Update(ctx, user); err != nil {
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return err
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}
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logs.Info(ctx, funcName, "密码修改成功", zap.Int64("user_id", userID))
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return nil
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}
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// checkUserStatus 检查用户账号状态
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func (s *AuthService) checkUserStatus(status int) error {
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switch status {
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case constants.UserStatusDisabled:
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return ErrUserDisabled
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case constants.UserStatusDeleted:
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return ErrUserDeleted
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default:
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return nil
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}
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}
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// buildLoginResponse 构建登录响应（生成 Token + 存入 Redis + 用户信息）
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// clientType 决定 Token 存入 Redis 的 key 前缀和 JWT Claims 中的 client_type 字段
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func (s *AuthService) buildLoginResponse(ctx context.Context, user *model.User, roles []string, clientType string) (*dto.LoginResponse, error) {
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if roles == nil {
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roles = []string{}
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}
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token, err := utils.GenerateToken(s.jwtCfg, user.ID, user.Username, roles, clientType)
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if err != nil {
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return nil, err
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}
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refreshToken, err := utils.GenerateRefreshToken(s.jwtCfg, user.ID, clientType)
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if err != nil {
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return nil, err
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}
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// 将 Token 存入 Redis（按 clientType 隔离，前台和管理端互不影响）
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if err = s.tokenStore.SaveTokens(ctx, user.ID, clientType, token, refreshToken); err != nil {
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return nil, err
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}
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return &dto.LoginResponse{
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Token: token,
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RefreshToken: refreshToken,
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ExpiresIn: int64(s.jwtCfg.AccessExpireMin) * 60,
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User: *s.buildUserInfo(user, roles),
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}, nil
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}
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// buildUserInfo 从 model.User 构建 dto.UserInfo
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func (s *AuthService) buildUserInfo(user *model.User, roles []string) *dto.UserInfo {
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if roles == nil {
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roles = []string{}
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}
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info := &dto.UserInfo{
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ID: user.ID,
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Username: user.Username,
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Email: user.Email,
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Nickname: user.Nickname,
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Avatar: user.Avatar,
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Gender: user.Gender,
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Roles: roles,
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CreatedAt: user.CreatedAt.Format("2006-01-02 15:04:05"),
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}
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if user.Phone != nil {
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info.Phone = *user.Phone
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}
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return info
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}
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