后端提现增加

backend/internal/modules/paymentaccount/service.go

@@ -0,0 +1,80 @@
+package paymentaccount
+
+import "errors"
+
+var (
+	ErrDependencyUnavailable = errors.New("dependency unavailable")
+	ErrAccountNotFound       = errors.New("payment account not found")
+	ErrAccountNameMismatch   = errors.New("account name must match realname")
+	ErrRealnameRequired      = errors.New("realname verification required")
+	ErrAccountLimit          = errors.New("maximum payment accounts reached")
+	ErrCannotDeleteDefault   = errors.New("cannot delete default account")
+)
+
+type Service struct {
+	repo *Repository
+}
+
+func NewService(repo *Repository) *Service {
+	return &Service{repo: repo}
+}
+
+func (s *Service) List(userID uint64, 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(userID, page, pageSize)
+}
+
+func (s *Service) FindByID(userID, id uint64) (*PaymentAccountDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.FindByID(userID, id)
+}
+
+func (s *Service) Create(userID uint64, req CreatePaymentAccountRequest) (*PaymentAccountDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	// 验证实名状态
+	if err := s.repo.ValidateRealname(userID, req.AccountName); err != nil {
+		return nil, err
+	}
+	// 检查账号数量限制（最多5个）
+	count, err := s.repo.CountByUser(userID)
+	if err != nil {
+		return nil, err
+	}
+	if count >= 5 {
+		return nil, ErrAccountLimit
+	}
+	return s.repo.Create(userID, req)
+}
+
+func (s *Service) Update(userID, id uint64, req UpdatePaymentAccountRequest) (*PaymentAccountDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.Update(userID, id, req)
+}
+
+func (s *Service) Delete(userID, id uint64) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	return s.repo.Delete(userID, id)
+}
+
+func (s *Service) SetDefault(userID, id uint64) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	return s.repo.SetDefault(userID, id)
+}