Add timestamps to server log files

Servers are now writing timestamps to the log files using the the ISO 8601 timestamp format defined in the game server settings.

OpenRA.Game/Support/Log.cs

@@ -18,6 +18,7 @@ namespace OpenRA
 	public struct ChannelInfo
 	{
 		public string Filename;
+		public bool IsTimestamped;
 		public TextWriter Writer;
 	}
 
@@ -44,7 +45,7 @@ namespace OpenRA
 			return info;
 		}
 
-		public static void AddChannel(string channelName, string baseFilename)
+		public static void AddChannel(string channelName, string baseFilename, bool isTimestamped = false)
 		{
 			lock (Channels)
 			{
@@ -66,6 +67,7 @@ namespace OpenRA
 							new ChannelInfo
 							{
 								Filename = filename,
+								IsTimestamped = isTimestamped,
 								Writer = TextWriter.Synchronized(writer)
 							});
 
@@ -75,22 +77,35 @@ namespace OpenRA
 			}
 		}
 
-		public static void Write(string channel, string value)
+		public static void Write(string channelName, string value)
 		{
-			var writer = Channel(channel).Writer;
+			var channel = Channel(channelName);
+			var writer = channel.Writer;
 			if (writer == null)
 				return;
 
-			writer.WriteLine(value);
+			if (!channel.IsTimestamped)
+				writer.WriteLine(value);
+			else
+			{
+				var timestamp = DateTime.Now.ToString(Game.Settings.Server.TimestampFormat);
+				writer.WriteLine("[{0}] {1}", timestamp, value);
+			}
 		}
 
-		public static void Write(string channel, string format, params object[] args)
+		public static void Write(string channelName, string format, params object[] args)
 		{
-			var writer = Channel(channel).Writer;
-			if (writer == null)
+			var channel = Channel(channelName);
+			if (channel.Writer == null)
 				return;
 
-			writer.WriteLine(format, args);
+			if (!channel.IsTimestamped)
+				channel.Writer.WriteLine(format, args);
+			else
+			{
+				var timestamp = DateTime.Now.ToString(Game.Settings.Server.TimestampFormat);
+				channel.Writer.WriteLine("[{0}] {1}", timestamp, format.F(args));
+			}
 		}
 	}
 }