[42] Client: add splitId patch

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.Client/Mappers/Object/ObjectHeaderMapper.cs

@@ -24,25 +24,14 @@ public static class ObjectHeaderMapper
             _ => throw new ArgumentException($"Unknown ObjectType. Value: '{header.ObjectType}'.")
         };
 
-        FrostFsSplit? split = null;
+        FrostFsSplit? split = header!.Split != null
-
+            ? header.Split.ToModel()
-        if (header.Split != null)
+            : null;
-        {
-            var children = header.Split.Children.Count != 0 ? new ReadOnlyCollection<FrostFsObjectId>(
-                    header.Split.Children.Select(x => x.ToModel()).ToList()) : null;
-
-            split = new FrostFsSplit(new SplitId(header.Split.SplitId.ToUuid()),
-                header.Split.Previous?.ToModel(),
-                header.Split.Parent?.ToModel(),
-                header.Split.ParentHeader?.ToModel(),
-                null,
-                children);
-        }
 
         var model = new FrostFsObjectHeader(
             new FrostFsContainerId(Base58.Encode(header.ContainerId.Value.Span)),
             objTypeName,
-            header.Attributes.Select(attribute => attribute.ToModel()).ToArray(),
+            [.. header.Attributes.Select(attribute => attribute.ToModel())],
             split,
             header.OwnerId.ToModel(),
             header.Version.ToModel())
@@ -52,4 +41,18 @@ public static class ObjectHeaderMapper
 
         return model;
     }
+   
+    public static FrostFsSplit ToModel(this Header.Types.Split split)
+    {
+        var children = split!.Children.Count != 0
+            ? new ReadOnlyCollection<FrostFsObjectId>([.. split.Children.Select(x => x.ToModel())])
+            : null;
+
+        return new FrostFsSplit(new SplitId(split.SplitId.ToUuid()),
+                        split.Previous?.ToModel(),
+                        split.Parent?.ToModel(),
+                        split.ParentHeader?.ToModel(),
+                        null,
+                        children);
+    }
 }

src/FrostFS.SDK.Client/Models/Object/FrostFsSplit.cs

@@ -1,4 +1,7 @@
 using System.Collections.ObjectModel;
+using System.Linq;
+using FrostFS.Object;
+using FrostFS.SDK.Client.Mappers.GRPC;
 
 namespace FrostFS.SDK;
 
@@ -9,6 +12,8 @@ public class FrostFsSplit(SplitId splitId,
     FrostFsSignature? parentSignature = null,
     ReadOnlyCollection<FrostFsObjectId>? children = null)
 {
+    private Header.Types.Split? _split;
+
     public FrostFsSplit() : this(new SplitId())
     {
     }
@@ -24,4 +29,25 @@ public class FrostFsSplit(SplitId splitId,
     public FrostFsObjectHeader? ParentHeader { get; set; } = parentHeader;
 
     public ReadOnlyCollection<FrostFsObjectId>? Children { get; } = children;
+
+    public Header.Types.Split GetSplit()
+    {
+        if (_split == null)
+        {
+            _split = new Header.Types.Split
+            {
+                SplitId = SplitId?.GetSplitId(),
+                Parent = Parent?.ToMessage(),
+                ParentHeader = ParentHeader?.GetHeader(),
+                ParentSignature = ParentSignature?.ToMessage()
+            };
+
+            if (Children != null)
+            {
+                _split.Children.AddRange(Children.Select(x => x.ToMessage()));
+            }
+        }
+
+        return _split;
+    }
 }

src/FrostFS.SDK.Client/Parameters/PrmObjectPatch.cs

@@ -10,6 +10,7 @@ public readonly struct PrmObjectPatch(
     FrostFsSessionToken? sessionToken = null,
     bool replaceAttributes = false,
     FrostFsAttributePair[]? newAttributes = null,
+    FrostFsSplit? newSplitHeader = null,
     string[]? xheaders = null) : ISessionToken, System.IEquatable<PrmObjectPatch>
 {
     public FrostFsAddress Address { get; } = address;
@@ -23,6 +24,8 @@ public readonly struct PrmObjectPatch(
 
     public FrostFsAttributePair[]? NewAttributes { get; } = newAttributes;
 
+    public FrostFsSplit? NewSplitHeader { get; } = newSplitHeader;
+
     public bool ReplaceAttributes { get; } = replaceAttributes;
 
     public int MaxChunkLength { get; } = maxChunkLength;

src/FrostFS.SDK.Client/Services/ObjectServiceProvider.cs

@@ -356,6 +356,11 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
                         }
                     }
 
+                    if (args.NewSplitHeader != null)
+                    {
+                        request.Body.NewSplitHeader = args.NewSplitHeader.GetSplit();
+                    }
+
                     isFirstChunk = false;
                 }
                 else

src/FrostFS.SDK.Protos/object/service.proto

@@ -887,6 +887,10 @@ message PatchRequest {
     // key, then it just replaces it while merging the lists.
     bool replace_attributes = 3;
 
+    // New split header for the object. This defines how the object will relate
+    // to other objects in a split operation.
+    neo.fs.v2.object.Header.Split new_split_header = 5;
+
     // The patch for the object's payload.
     message Patch {
       // The range of the source object for which the payload is replaced by the