增加站内信未读提醒和后台通知中心+txt 校验

backend/internal/modules/adminnotification/service.go

@@ -0,0 +1,49 @@
+package adminnotification
+
+import (
+	"context"
+	"errors"
+)
+
+var ErrDependencyUnavailable = errors.New("dependency unavailable")
+var ErrNotificationNotFound = errors.New("admin notification not found")
+
+type Service struct {
+	repo *Repository
+}
+
+func NewService(repo *Repository) *Service {
+	return &Service{repo: repo}
+}
+
+func (s *Service) List(ctx context.Context, query Query) (*PaginatedResult, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.List(ctx, query)
+}
+
+func (s *Service) UnreadCount(ctx context.Context, adminUserID uint64) (*UnreadCountDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	count, err := s.repo.UnreadCount(ctx, adminUserID)
+	if err != nil {
+		return nil, err
+	}
+	return &UnreadCountDTO{UnreadCount: count}, nil
+}
+
+func (s *Service) MarkRead(ctx context.Context, adminUserID uint64, id uint64) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	return s.repo.MarkRead(ctx, adminUserID, id)
+}
+
+func (s *Service) MarkAllRead(ctx context.Context, adminUserID uint64) (int64, error) {
+	if s.repo == nil {
+		return 0, ErrDependencyUnavailable
+	}
+	return s.repo.MarkAllRead(ctx, adminUserID)
+}