[#577] Add IsDeleteMarker() to NodeVersion

Signed-off-by: Angira Kekteeva <kira@nspcc.ru>

api/data/tree.go

@@ -20,6 +20,10 @@ type NodeVersion struct {
 	IsUnversioned bool
 }
 
+func (v NodeVersion) IsDeleteMarker() bool {
+	return v.DeleteMarker != nil
+}
+
 // DeleteMarkerInfo is used to save object info if node in the tree service is delete marker.
 // We need this information because the "delete marker" object is no longer stored in NeoFS.
 type DeleteMarkerInfo struct {

api/handler/attributes.go

@@ -122,7 +122,7 @@ func writeAttributesHeaders(h http.Header, info *data.ExtendedObjectInfo, isBuck
 		h.Set(api.AmzVersionID, info.Version())
 	}
 
-	if info.NodeVersion.DeleteMarker != nil {
+	if info.NodeVersion.IsDeleteMarker() {
 		h.Set(api.AmzDeleteMarker, strconv.FormatBool(true))
 	}
 

api/layer/layer.go

@@ -556,7 +556,7 @@ func (n *layer) getNodeVersionToDelete(ctx context.Context, bkt *data.BucketInfo
 }
 
 func (n *layer) removeOldVersion(ctx context.Context, bkt *data.BucketInfo, nodeVersion *data.NodeVersion, obj *VersionedObject) (string, error) {
-	if nodeVersion.DeleteMarker != nil {
+	if nodeVersion.IsDeleteMarker() {
 		return obj.VersionID, nil
 	}
 

api/layer/object.go

@@ -264,7 +264,7 @@ func (n *layer) headLastVersionIfNotDeleted(ctx context.Context, bkt *data.Bucke
 		return nil, err
 	}
 
-	if node.DeleteMarker != nil {
+	if node.IsDeleteMarker() {
 		return nil, apiErrors.GetAPIError(apiErrors.ErrNoSuchKey)
 	}
 
@@ -596,7 +596,7 @@ func (n *layer) getAllObjectsVersions(ctx context.Context, bkt *data.BucketInfo,
 	for _, nodeVersion := range nodeVersions {
 		oi := &data.ObjectInfo{}
 
-		if nodeVersion.DeleteMarker != nil { // delete marker does not match any object in NeoFS
+		if nodeVersion.IsDeleteMarker() { // delete marker does not match any object in NeoFS
 			oi.ID = nodeVersion.OID
 			oi.Name = nodeVersion.FilePath
 			oi.Owner = nodeVersion.DeleteMarker.Owner

api/layer/tagging.go

@@ -163,7 +163,7 @@ func (n *layer) getNodeVersion(ctx context.Context, objVersion *ObjectVersion) (
 		}
 	}
 
-	if err == nil && version.DeleteMarker != nil && !objVersion.NoErrorOnDeleteMarker || errorsStd.Is(err, ErrNodeNotFound) {
+	if err == nil && version.IsDeleteMarker() && !objVersion.NoErrorOnDeleteMarker || errorsStd.Is(err, ErrNodeNotFound) {
 		return nil, errors.GetAPIError(errors.ErrNoSuchKey)
 	}
 

api/layer/versioning.go

@@ -68,7 +68,7 @@ func triageVersions(objVersions []*data.ExtendedObjectInfo) ([]*data.ExtendedObj
 	var resDelMarkVersions []*data.ExtendedObjectInfo
 
 	for _, version := range objVersions {
-		if version.NodeVersion.DeleteMarker != nil {
+		if version.NodeVersion.IsDeleteMarker() {
 			resDelMarkVersions = append(resDelMarkVersions, version)
 		} else {
 			resVersion = append(resVersion, version)

internal/neofs/tree.go

@@ -747,7 +747,7 @@ func (c *TreeClient) getSubTreeVersions(ctx context.Context, cnrID cid.ID, nodeI
 
 	result := make([]*data.NodeVersion, 0, len(versions)) // consider use len(subTree)
 	for _, version := range versions {
-		if latestOnly && version[0].DeleteMarker != nil {
+		if latestOnly && version[0].IsDeleteMarker() {
 			continue
 		}
 		result = append(result, version...)
@@ -1066,7 +1066,7 @@ func (c *TreeClient) addVersion(ctx context.Context, cnrID cid.ID, treeID string
 		meta[etagKV] = version.ETag
 	}
 
-	if version.DeleteMarker != nil {
+	if version.IsDeleteMarker() {
 		meta[isDeleteMarkerKV] = "true"
 		meta[ownerKV] = version.DeleteMarker.Owner.EncodeToString()
 		meta[createdKV] = strconv.FormatInt(version.DeleteMarker.Created.UTC().UnixMilli(), 10)