Implement LobbyServer

LobbyServer/CommandStream.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Net.Sockets;
+using System.Text;
+
+namespace LobbyServer
+{
+    class CommandStream
+    {
+        private NetworkStream _stream;
+
+        public CommandStream(NetworkStream stream)
+        {
+            _stream = stream;
+        }
+
+        public CommandPacket Receive()
+        {
+            // Length
+            byte[] buffer = new byte[4];
+            _stream.Read(buffer, 0, buffer.Length);
+
+            uint length = BitConverter.ToUInt32(buffer, 0);
+
+            // Data
+            buffer = new byte[length];
+            _stream.Read(buffer, 0, buffer.Length);
+
+            string[] packet = Encoding.UTF8.GetString(buffer).Split('\n');
+
+            if (!Enum.TryParse(packet[0], true, out Command command))
+            {
+                command = Command.Invalid;
+            }
+
+            return new CommandPacket(command, packet[1]);
+        }
+
+        public void Send(CommandPacket command)
+        {
+            string packet = command.ToString();
+            byte[] data = Encoding.UTF8.GetBytes(packet);
+
+            _stream.Write(BitConverter.GetBytes((uint)data.Length), 0, 4);
+            _stream.Write(data, 0, data.Length);
+        }
+    }
+}