chore: count space members without retrieving all member info

save some RAM

internal/handler/space.go

@@ -37,15 +37,16 @@ func (h *spaceHandler) SpacesPage(w http.ResponseWriter, r *http.Request) {
 
 	cards := make([]blocks.SpaceCardInfo, 0, len(spaces))
 	for _, sp := range spaces {
-		members, err := h.spaceService.GetMembers(sp.ID)
+		memberCount, err := h.spaceService.GetMemberCount(sp.ID)
 		if err != nil {
-			slog.Error("failed to load space members", "error", err, "space_id", sp.ID)
-			members = nil
+			slog.Error("failed to get space member count", "error", err, "space_id", sp.ID)
+			memberCount = 0
 		}
+
 		cards = append(cards, blocks.SpaceCardInfo{
 			ID:           sp.ID,
 			Name:         sp.Name,
-			MemberCount:  len(members),
+			MemberCount:  memberCount,
 			TotalBalance: decimal.Zero,
 			Currency:     currency.CAD,
 		})

internal/repository/space.go

@@ -22,6 +22,7 @@ type SpaceRepository interface {
 	IsMember(spaceID, userID string) (bool, error)
 	GetMembers(spaceID string) ([]*model.SpaceMemberWithProfile, error)
 	UpdateName(spaceID, name string) error
+	GetMemberCount(spaceID string) (int, error)
 
 	Delete(spaceID string) error
 }
@@ -130,9 +131,18 @@ func (r *spaceRepository) UpdateName(spaceID, name string) error {
 	return err
 }
 
-
 func (r *spaceRepository) Delete(spaceID string) error {
 	query := `DELETE FROM spaces WHERE id = $1;`
 	_, err := r.db.Exec(query, spaceID)
 	return err
 }
+
+func (r *spaceRepository) GetMemberCount(spaceID string) (int, error) {
+	query := `SELECT COUNT(sm.user_id) FROM space_members sm WHERE sm.space_id = $1`
+	var count int
+	err := r.db.Get(&count, query, spaceID)
+	if err != nil {
+		return 0, err
+	}
+	return count, nil
+}

internal/service/space.go

@@ -94,3 +94,11 @@ func (s *SpaceService) UpdateSpaceName(spaceID, name string) error {
 func (s *SpaceService) DeleteSpace(spaceID string) error {
 	return s.spaceRepo.Delete(spaceID)
 }
+
+func (s *SpaceService) GetMemberCount(spaceID string) (int, error) {
+	count, err := s.spaceRepo.GetMemberCount(spaceID)
+	if err != nil {
+		return 0, fmt.Errorf("failed to get member count: %w", err)
+	}
+	return count, nil
+}