Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Game/Network/ReplayRecorder.cs

@@ -0,0 +1,119 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using System.IO;
+using System.Linq;
+using OpenRA.FileFormats;
+
+namespace OpenRA.Network
+{
+	public sealed class ReplayRecorder
+	{
+		// Arbitrary value.
+		const int CreateReplayFileMaxRetryCount = 128;
+
+		public ReplayMetadata Metadata;
+		BinaryWriter writer;
+		readonly Func<string> chooseFilename;
+		MemoryStream preStartBuffer = new();
+
+		static bool IsGameStart(byte[] data)
+		{
+			if (!OrderIO.TryParseOrderPacket(data, out var orders))
+				return false;
+
+			return orders.Frame == 0 && orders.Orders.GetOrders(null).Any(o => o.OrderString == "StartGame");
+		}
+
+		public ReplayRecorder(Func<string> chooseFilename)
+		{
+			this.chooseFilename = chooseFilename;
+
+			writer = new BinaryWriter(preStartBuffer);
+		}
+
+		void StartSavingReplay(byte[] initialContent)
+		{
+			var filename = chooseFilename();
+			var mod = Game.ModData.Manifest;
+			var dir = Path.Combine(Platform.SupportDir, "Replays", mod.Id, mod.Metadata.Version);
+
+			if (!Directory.Exists(dir))
+				Directory.CreateDirectory(dir);
+
+			FileStream file = null;
+			var id = -1;
+			while (file == null)
+			{
+				var fullFilename = Path.Combine(dir, id < 0 ? $"{filename}.orarep" : $"{filename}-{id}.orarep");
+				id++;
+				try
+				{
+					file = File.Create(fullFilename);
+				}
+				catch (IOException ex)
+				{
+					if (id > CreateReplayFileMaxRetryCount)
+						throw new ArgumentException($"Error creating replay file \"{filename}.orarep\"", ex);
+				}
+			}
+
+			file.Write(initialContent);
+			writer = new BinaryWriter(file);
+		}
+
+		public void Receive(int clientID, byte[] data)
+		{
+			if (disposed) // TODO: This can be removed once NetworkConnection is fixed to dispose properly.
+				return;
+
+			if (preStartBuffer != null && IsGameStart(data))
+			{
+				writer.Flush();
+				var preStartData = preStartBuffer.ToArray();
+				preStartBuffer = null;
+				StartSavingReplay(preStartData);
+			}
+
+			writer.Write(clientID);
+			writer.Write(data.Length);
+			writer.Write(data);
+		}
+
+		public void ReceiveFrame(int clientID, int frame, byte[] data)
+		{
+			var ms = new MemoryStream(4 + data.Length);
+			ms.Write(frame);
+			ms.Write(data);
+			Receive(clientID, ms.GetBuffer());
+		}
+
+		bool disposed;
+
+		public void Dispose()
+		{
+			if (disposed)
+				return;
+			disposed = true;
+
+			if (Metadata != null)
+			{
+				if (Metadata.GameInfo != null)
+					Metadata.GameInfo.EndTimeUtc = DateTime.UtcNow;
+				Metadata.Write(writer);
+			}
+
+			preStartBuffer?.Dispose();
+			writer.Close();
+		}
+	}
+}