Implement keep alive

This prevents clients from disconnecting after a while.

TrueCraft/Handlers/LoginHandlers.cs

@@ -41,6 +41,7 @@ namespace TrueCraft.Handlers
                 client.QueuePacket(new SpawnPositionPacket(0, 16, 0));
                 client.QueuePacket(new SetPlayerPositionPacket(0, 16, 17, 0, 0, 0, true));
                 client.QueuePacket(new ChatMessagePacket(string.Format("Welcome to the server, {0}!", client.Username)));
+                server.Scheduler.ScheduleEvent(DateTime.Now.AddSeconds(10), client.SendKeepAlive);
             }
         }
     }

TrueCraft/Handlers/PacketHandlers.cs

@@ -1,6 +1,7 @@
 using System;
 using TrueCraft.API.Server;
 using TrueCraft.Core.Networking.Packets;
+using TrueCraft.API.Networking;
 
 namespace TrueCraft.Handlers
 {
@@ -11,5 +12,10 @@ namespace TrueCraft.Handlers
             server.RegisterPacketHandler(new HandshakePacket().ID, LoginHandlers.HandleHandshakePacket);
             server.RegisterPacketHandler(new LoginRequestPacket().ID, LoginHandlers.HandleLoginRequestPacket);
         }
+
+        internal static void HandleKeepAlive(IPacket _packet, IRemoteClient _client, IMultiplayerServer server)
+        {
+            // TODO
+        }
     }
 }

TrueCraft/RemoteClient.cs

@@ -51,6 +51,12 @@ namespace TrueCraft
             PacketQueue.Enqueue(packet);
         }
 
+        internal void SendKeepAlive(IMultiplayerServer server)
+        {
+            QueuePacket(new KeepAlivePacket());
+            server.Scheduler.ScheduleEvent(DateTime.Now.AddSeconds(10), SendKeepAlive);
+        }
+
         internal void UpdateChunks()
         {
             var newChunks = new List<Coordinates2D>();
@@ -106,7 +112,7 @@ namespace TrueCraft
             LoadedChunks.Remove(position);
         }
 
-        public static ChunkDataPacket CreatePacket(IChunk chunk)
+        private static ChunkDataPacket CreatePacket(IChunk chunk)
         {
             // TODO: Be smarter about this
             var X = chunk.Coordinates.X;