[#28] Clients: Make immutable parameters

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

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

@@ -2,23 +2,70 @@
 
 namespace FrostFS.SDK.Client;
 
-public sealed class PrmObjectPatch(FrostFsAddress address, CallContext? ctx = null) : PrmBase(ctx), ISessionToken
+public readonly struct PrmObjectPatch(
+    FrostFsAddress address,
+    FrostFsRange range,
+    Stream? payload,
+    int maxChunkLength,
+    FrostFsSessionToken? sessionToken = null,
+    bool replaceAttributes = false,
+    FrostFsAttributePair[]? newAttributes = null,
+    string[]? xheaders = null) : ISessionToken, System.IEquatable<PrmObjectPatch>
 {
     public FrostFsAddress Address { get; } = address;
 
-    public FrostFsRange Range { get; set; }
+    public FrostFsRange Range { get; } = range;
 
     /// <summary>
     /// A stream with source data
     /// </summary>
-    public Stream? Payload { get; set; }
+    public Stream? Payload { get; } = payload;
 
-    public FrostFsAttributePair[]? NewAttributes { get; set; }
+    public FrostFsAttributePair[]? NewAttributes { get; } = newAttributes;
 
-    public bool ReplaceAttributes { get; set; }
+    public bool ReplaceAttributes { get; } = replaceAttributes;
 
-    public int MaxPayloadPatchChunkLength { get; set; }
+    public int MaxChunkLength { get; } = maxChunkLength;
 
     /// <inheritdoc />
-    public FrostFsSessionToken? SessionToken { get; set; }
+    public FrostFsSessionToken? SessionToken { get; } = sessionToken;
+
+    /// <summary>
+    /// FrostFS request X-Headers
+    /// </summary>
+    public string[] XHeaders { get; } = xheaders ?? [];
+
+    public override readonly bool Equals(object obj)
+    {
+        if (obj == null || obj is not PrmObjectPatch)
+            return false;
+
+        return Equals((PrmObjectPatch)obj);
+    }
+
+    public readonly bool Equals(PrmObjectPatch other)
+    {
+        return GetHashCode() == other.GetHashCode();
+    }
+
+    public override readonly int GetHashCode()
+    {
+        return Address.GetHashCode()
+           ^ Range.GetHashCode()
+           ^ (Payload == null ? 0 : Payload.GetHashCode())
+           ^ (NewAttributes == null ? 0 : NewAttributes.GetHashCode())
+           ^ (SessionToken == null ? 0 : SessionToken.GetHashCode())
+           ^ (ReplaceAttributes ? 1 : 0)
+           ^ MaxChunkLength;
+    }
+
+    public static bool operator ==(PrmObjectPatch left, PrmObjectPatch right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(PrmObjectPatch left, PrmObjectPatch right)
+    {
+        return !(left == right);
+    }
 }