chore(init): 初始化解忧商行项目并完成 Phase 0 基座

backend/internal/modules/adminmgr/service.go

@@ -0,0 +1,108 @@
+package adminmgr
+
+import (
+	"context"
+	"errors"
+	"unicode"
+)
+
+var (
+	ErrDependencyUnavailable = errors.New("dependency unavailable")
+	ErrWeakPassword          = errors.New("weak password")
+)
+
+type Service struct {
+	repo *Repository
+}
+
+func NewService(repo *Repository) *Service {
+	return &Service{repo: repo}
+}
+
+func (s *Service) List(ctx context.Context, page, pageSize int) (*PaginatedResult, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 || pageSize > 100 {
+		pageSize = 20
+	}
+	return s.repo.List(ctx, page, pageSize)
+}
+
+func (s *Service) FindByID(ctx context.Context, id uint64) (*AdminUserDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.FindByID(ctx, id)
+}
+
+func (s *Service) Create(ctx context.Context, req CreateAdminRequest) (*AdminUserDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	if !passwordStrongEnough(req.Password) {
+		return nil, ErrWeakPassword
+	}
+	return s.repo.Create(ctx, req)
+}
+
+func (s *Service) Update(ctx context.Context, id uint64, req UpdateAdminRequest) (*AdminUserDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.Update(ctx, id, req)
+}
+
+func (s *Service) Delete(ctx context.Context, id uint64, currentAdminID uint64) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	return s.repo.Delete(ctx, id, currentAdminID)
+}
+
+func (s *Service) AssignRoles(ctx context.Context, adminID uint64, req AssignRolesRequest) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	return s.repo.AssignRoles(ctx, adminID, req.RoleIDs)
+}
+
+func (s *Service) ChangeOwnPassword(ctx context.Context, adminID uint64, req ChangePasswordRequest) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	if !passwordStrongEnough(req.NewPassword) {
+		return ErrWeakPassword
+	}
+	return s.repo.ChangeOwnPassword(ctx, adminID, req.OldPassword, req.NewPassword)
+}
+
+func (s *Service) ResetPassword(ctx context.Context, id uint64, req ResetPasswordRequest) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	if !passwordStrongEnough(req.NewPassword) {
+		return ErrWeakPassword
+	}
+	return s.repo.ResetPassword(ctx, id, req.NewPassword)
+}
+
+func passwordStrongEnough(value string) bool {
+	if len([]rune(value)) < 8 {
+		return false
+	}
+	hasLetter := false
+	hasDigit := false
+	for _, r := range value {
+		if unicode.IsLetter(r) {
+			hasLetter = true
+		}
+		if unicode.IsDigit(r) {
+			hasDigit = true
+		}
+	}
+	return hasLetter && hasDigit
+}