第 5 阶段：纠纷、通知与后台-2

backend/internal/modules/adminauth/service.go

@@ -0,0 +1,34 @@
+package adminauth
+
+import "errors"
+
+var (
+	ErrDependencyUnavailable = errors.New("dependency unavailable")
+	ErrInvalidCredential     = errors.New("invalid credential")
+	ErrAdminDisabled         = errors.New("admin disabled")
+)
+
+type Service struct {
+	repo *Repository
+}
+
+func NewService(repo *Repository) *Service {
+	return &Service{repo: repo}
+}
+
+func (s *Service) Login(username string, password string) (LoginResult, error) {
+	if s.repo == nil {
+		return LoginResult{}, ErrDependencyUnavailable
+	}
+	if username == "" || password == "" {
+		return LoginResult{}, ErrInvalidCredential
+	}
+	return s.repo.Login(username, password)
+}
+
+func (s *Service) Me(adminID uint64) (*AdminDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.FindByID(adminID)
+}