Initial port

MinecraftClient/MessageEncoder.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MinecraftClient
+{
+	public enum MessageType : int
+	{
+		Response,
+		_,
+		Command,
+		Authenticate
+	}
+
+	public readonly struct Message
+	{
+		public readonly int Length;
+		public readonly int ID;
+		public readonly MessageType Type;
+		public readonly String Body;
+
+		public Message(int length, int id, MessageType type, String body)
+		{
+			Length = length;
+			ID = id;
+			Type = type;
+			Body = body;
+		}
+	}
+
+	public class Encoder
+	{
+		public const int HeaderLength = 10; // Does not include 4-byte message length.
+
+		public static byte[] EncodeMessage(Message msg)
+		{
+			List<byte> bytes = new List<byte>();
+
+			bytes.AddRange(BitConverter.GetBytes(msg.Length));
+			bytes.AddRange(BitConverter.GetBytes(msg.ID));
+			bytes.AddRange(BitConverter.GetBytes((int)msg.Type));
+			bytes.AddRange(Encoding.ASCII.GetBytes(msg.Body));
+			bytes.AddRange(new byte[] { 0, 0 });
+
+			return bytes.ToArray();
+		}
+
+		public static Message DecodeMessage(byte[] bytes)
+		{
+			int len = BitConverter.ToInt32(bytes, 0);
+			int id = BitConverter.ToInt32(bytes, 4);
+			int type = BitConverter.ToInt32(bytes, 8);
+
+			int bodyLen = bytes.Length - (HeaderLength + 4);
+			if (bodyLen > 0)
+			{
+				byte[] bodyBytes = new byte[bodyLen];
+				Array.Copy(bytes, 12, bodyBytes, 0, bodyLen);
+				Array.Resize(ref bodyBytes, bodyLen);
+				return new Message(len, id, (MessageType)type, Encoding.ASCII.GetString(bodyBytes));
+			}
+			else { return new Message(len, id, (MessageType)type, ""); }
+		}
+	}
+}