[#58] Observable client cut

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

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

@@ -0,0 +1,8 @@
+using System;
+
+namespace FrostFS.SDK.Client;
+
+public class PartUploadedEventArgs(ObjectPartInfo part) : EventArgs
+{
+    public ObjectPartInfo Part { get; } = part;
+}

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

@@ -0,0 +1,38 @@
+using FrostFS.SDK;
+
+namespace FrostFS.SDK.Client;
+
+public readonly struct ObjectPartInfo(long offset, int length, FrostFsObjectId objectId) : System.IEquatable<ObjectPartInfo>
+{
+    public long Offset { get; } = offset;
+    public int Length { get; } = length;
+    public FrostFsObjectId ObjectId { get; } = objectId;
+
+    public override bool Equals(object obj)
+    {
+        if (obj == null || obj is not ObjectPartInfo)
+            return false;
+
+        return Equals((ObjectPartInfo)obj);
+    }
+
+    public override int GetHashCode()
+    {
+        return ((int)(Offset >> 32)) ^ (int)Offset ^ Length ^ ObjectId.Value.GetHashCode();
+    }
+
+    public static bool operator ==(ObjectPartInfo left, ObjectPartInfo right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(ObjectPartInfo left, ObjectPartInfo right)
+    {
+        return !(left == right);
+    }
+
+    public bool Equals(ObjectPartInfo other)
+    {
+        return GetHashCode() == other.GetHashCode();
+    }
+}

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

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+
+namespace FrostFS.SDK.Client;
+
+public class UploadProgressInfo
+{
+    private List<ObjectPartInfo> _parts;
+
+    public UploadProgressInfo(Guid splitId, int capacity = 8)
+    {
+        _parts = new List<ObjectPartInfo>(capacity);
+        SplitId = new SplitId(splitId);
+    }
+
+    public UploadProgressInfo(Guid splitId, Collection<ObjectPartInfo> parts)
+    {
+        _parts = [.. parts];
+        SplitId = new SplitId(splitId);
+    }
+
+    public event EventHandler<PartUploadedEventArgs>? Notify;
+
+    public SplitId SplitId { get; }
+
+    internal void AddPart(ObjectPartInfo part)
+    {
+        _parts.Add(part);
+        Notify?.Invoke(this, new PartUploadedEventArgs(part));
+    }
+
+    public ObjectPartInfo GetPart(int index)
+    {
+        return _parts[index];
+    }
+
+    public ObjectPartInfo GetLast()
+    {
+        return _parts.LastOrDefault();
+    }
+
+    public ReadOnlyCollection<ObjectPartInfo> GetParts()
+    {
+        return new ReadOnlyCollection<ObjectPartInfo>(_parts);
+    }
+}