项目初始化

service/user_service.go

@@ -0,0 +1,69 @@
+package service
+
+import (
+	"RelationshipManagement-backend/dao"
+	"RelationshipManagement-backend/model"
+	"errors"
+)
+
+// UserService 用户服务
+type UserService struct {
+	userDAO *dao.UserDAO
+}
+
+// NewUserService 创建用户服务实例
+func NewUserService(userDAO *dao.UserDAO) *UserService {
+	return &UserService{userDAO: userDAO}
+}
+
+// CreateUser 创建用户
+func (s *UserService) CreateUser(user *model.User) error {
+	// 检查用户名是否已存在
+	_, err := s.userDAO.GetByUsername(user.Username)
+	if err == nil {
+		return errors.New("用户名已存在")
+	}
+
+	// 检查邮箱是否已存在
+	_, err = s.userDAO.GetByEmail(user.Email)
+	if err == nil {
+		return errors.New("邮箱已存在")
+	}
+
+	// 创建用户
+	return s.userDAO.Create(user)
+}
+
+// GetUserByID 根据ID获取用户
+func (s *UserService) GetUserByID(id uint) (*model.User, error) {
+	return s.userDAO.GetByID(id)
+}
+
+// GetUserByUsername 根据用户名获取用户
+func (s *UserService) GetUserByUsername(username string) (*model.User, error) {
+	return s.userDAO.GetByUsername(username)
+}
+
+// UpdateUser 更新用户
+func (s *UserService) UpdateUser(user *model.User) error {
+	return s.userDAO.Update(user)
+}
+
+// DeleteUser 删除用户
+func (s *UserService) DeleteUser(id uint) error {
+	return s.userDAO.Delete(id)
+}
+
+// ListUsers 获取用户列表
+func (s *UserService) ListUsers(page, pageSize int) ([]*model.User, int64, error) {
+	offset := (page - 1) * pageSize
+	users, err := s.userDAO.List(offset, pageSize)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	// 获取总数（这里简化处理，实际应该从DAO获取）
+	total := int64(len(users))
+	return users, total, nil
+}
+