[#28] Client: add method to calculate ObjectId

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

src/FrostFS.SDK.Client/FrostFSClient.cs

@@ -290,6 +290,14 @@ public class FrostFSClient : IFrostFSClient
     {
         return GetObjectService().SearchObjectsAsync(args, ctx);
     }
+
+    public FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header)
+    {
+        if (header == null)
+            throw new ArgumentNullException(nameof(header));
+
+        return ObjectTools.CalculateObjectId(header, ClientCtx.Owner, ClientCtx.Version, ClientCtx.Key);
+    }
     #endregion
 
     #region Session Implementation

src/FrostFS.SDK.Client/Interfaces/IFrostFSClient.cs

@@ -65,4 +65,6 @@ public interface IFrostFSClient
     #endregion
 
     public Task<string?> Dial(CallContext ctx);
+
+    FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header);
 }

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

@@ -20,7 +20,9 @@ public class FrostFsSplitInfo
 
     public SplitId SplitId => _splitId ??= new SplitId(_splitInfo.SplitId.ToUuid());
 
-    public FrostFsObjectId Link => _link ??= FrostFsObjectId.FromHash(_splitInfo.Link.Value.Span);
+    public FrostFsObjectId? Link => _link ??= _splitInfo.Link == null
+        ? null : FrostFsObjectId.FromHash(_splitInfo.Link.Value.Span);
 
-    public FrostFsObjectId LastPart => _lastPart ??= FrostFsObjectId.FromHash(_splitInfo.LastPart.Value.Span);
+    public FrostFsObjectId? LastPart => _lastPart ??= _splitInfo.LastPart == null
+        ? null : FrostFsObjectId.FromHash(_splitInfo.LastPart.Value.Span);
 }

src/FrostFS.SDK.Client/Pool/Pool.cs

@@ -39,6 +39,8 @@ public partial class Pool : IFrostFSClient
 
     private OwnerID? _ownerId;
 
+    private FrostFsVersion _version;
+
     private FrostFsOwner? _owner;
 
     private FrostFsOwner Owner
@@ -94,6 +96,8 @@ public partial class Pool : IFrostFSClient
             throw new ArgumentException($"Missed required parameter {nameof(options.Key)}");
         }
 
+        _version = new FrostFsVersion(2, 13);
+
         var nodesParams = AdjustNodeParams(options.NodeParams);
 
         var cache = new SessionCache(options.SessionExpirationDuration);
@@ -642,6 +646,14 @@ public partial class Pool : IFrostFSClient
         return client.Client!.SearchObjectsAsync(args, ctx);
     }
 
+    public FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header)
+    {
+        if (header == null)
+            throw new ArgumentNullException(nameof(header));
+
+        return ObjectTools.CalculateObjectId(header, Owner, _version, Key);
+    }
+
     public async Task<Accounting.Decimal> GetBalanceAsync(CallContext ctx)
     {
         var client = Connection();

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

@@ -565,7 +565,7 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
 
         if (header.Split != null)
         {
-            ObjectTools.SetSplitValues(grpcHeader, header.Split, ClientContext);
+            ObjectTools.SetSplitValues(grpcHeader, header.Split, ClientContext.Owner, ClientContext.Version, ClientContext.Key);
         }
 
         var oid = new ObjectID { Value = grpcHeader.Sha256() };

src/FrostFS.SDK.Client/Tools/ObjectTools.cs

@@ -11,6 +11,20 @@ namespace FrostFS.SDK.Client;
 
 internal static class ObjectTools
 {
+    internal static FrostFsObjectId CalculateObjectId(
+        FrostFsObjectHeader header, 
+        FrostFsOwner owner,
+        FrostFsVersion version,
+        ClientKey key)
+    {
+        var grpcHeader = CreateHeader(header, [], owner, version);
+
+        if (header.Split != null)
+            SetSplitValues(grpcHeader, header.Split, owner, version, key);
+
+        return new ObjectID { Value = grpcHeader.Sha256() }.ToModel();
+    }
+
     internal static Object.Object CreateObject(FrostFsObject @object, ClientContext ctx)
     {
         @object.Header.OwnerId ??= ctx.Owner;
@@ -24,7 +38,7 @@ internal static class ObjectTools
         var split = @object.Header.Split;
         if (split != null)
         {
-            SetSplitValues(grpcHeader, split, ctx);
+            SetSplitValues(grpcHeader, split, ctx.Owner, ctx.Version, ctx.Key);
         }
 
         var obj = new Object.Object
@@ -43,13 +57,17 @@ internal static class ObjectTools
         return obj;
     }
 
-    internal static void SetSplitValues(Header grpcHeader, FrostFsSplit split, ClientContext ctx)
+    internal static void SetSplitValues(
+        Header grpcHeader, 
+        FrostFsSplit split,
+        FrostFsOwner owner, FrostFsVersion version, 
+        ClientKey key)
     {
         if (split == null)
             return;
 
-        if (ctx.Key == null)
+        if (key == null)
-            throw new FrostFsInvalidObjectException(nameof(ctx.Key));
+            throw new FrostFsInvalidObjectException(nameof(key));
 
         grpcHeader.Split = new Header.Types.Split
         {
@@ -61,24 +79,24 @@ internal static class ObjectTools
 
         if (split.ParentHeader is not null)
         {
-            var grpcParentHeader = CreateHeader(split.ParentHeader, [], ctx);
+            var grpcParentHeader = CreateHeader(split.ParentHeader, [], owner, version);
 
             grpcHeader.Split.Parent = new ObjectID { Value = grpcParentHeader.Sha256() };
             grpcHeader.Split.ParentHeader = grpcParentHeader;
             grpcHeader.Split.ParentSignature = new Signature
             {
-                Key = ctx.Key.PublicKeyProto,
+                Key = key.PublicKeyProto,
-                Sign = ctx.Key.ECDsaKey.SignData(grpcHeader.Split.Parent.ToByteArray()),
+                Sign = key.ECDsaKey.SignData(grpcHeader.Split.Parent.ToByteArray()),
             };
         }
 
         grpcHeader.Split.Previous = split.Previous?.ToMessage();
     }
 
-    internal static Header CreateHeader(FrostFsObjectHeader header, byte[]? payload, ClientContext ctx)
+    internal static Header CreateHeader(FrostFsObjectHeader header, byte[]? payload, FrostFsOwner owner, FrostFsVersion version)
     {
-        header.OwnerId ??= ctx.Owner;
+        header.OwnerId ??= owner;
-        header.Version ??= ctx.Version;
+        header.Version ??= version;
 
         var grpcHeader = header.GetHeader();