/// <summary>
/// Handles data from the client - this is a delegate callback for processing client direction commands.
/// It processes the command, then asks for more data.
/// </summary>
/// <param name="client">The client.</param>
private void ReceiveDirection(SocketState client)
{
lock (world)
{
// Process direction change requests.
if (world.Snakes.ContainsKey(client.ID))
{
// Get the x and y coordinates of the client snake's head.
int snakesHeadX = world.Snakes[client.ID].Vertices.Last.Value._x;
int snakesHeadY = world.Snakes[client.ID].Vertices.Last.Value._y;
string s = Regex.Match(client.Messages[0], @"\(([^)]*)\)").Groups[1].Value;
int direction;
// Process the message as an integer representing the direction.
if (int.TryParse(s, out direction))
{
// Change the direction of the head on the world map. This allows us to
// receive multiple direction requests during the same frame cycle and
// save only the most recent one.
int currentDirection = world.WorldMap[snakesHeadX, snakesHeadY].direction;
if (!(currentDirection % 2 == 0 && direction % 2 == 0) && !(currentDirection % 2 == 1 && direction % 2 == 1))
{
world.WorldMap[snakesHeadX, snakesHeadY].direction = direction;
}
}
try
{
Network.GetData(client);
}
catch (SocketException e)
{
Debug.WriteLine("Could not receive from client due to disconnect. " + e);
}
}
}
}
/// <summary>
/// Callback for receiving client name.
/// </summary>
/// <param name="ss">The ss.</param>
private static void ReceiveName(SocketState ss)
{
// Extract name from received data
string name = ss.Builder.ToString();
name = name.Remove(name.Length - 1);
Console.WriteLine("Received name: " + name);
Network.Send(ss.Socket, ss.ID + "\n" + world.WorldSize + "\n");
clients.Add(ss);
Ship newShip = new Ship(ss.ID, name, random.Next(universeSize + 1) - (universeSize / 2), random.Next(universeSize + 1) - (universeSize / 2));
// Don't start ship in star's location
while (Math.Abs(newShip.Loc.GetX()) < starSize && Math.Abs(newShip.Loc.GetX()) < starSize)
{
newShip.Loc = new Vector2D(random.Next(universeSize + 1) - (universeSize / 2), random.Next(universeSize + 1) - (universeSize / 2));
}
world.AddShip(newShip);
ss.CallMe = ReceiveMoveRequest;
Network.GetData(ss);
}
/// <summary>
/// This is a delegate callback that handles the server's side of the initial handshake.
/// It receives the player's name and sends the client startup data, then requests direciton
/// change information from the client.
/// </summary>
/// <param name="client">The client.</param>
private void ReceivePlayerName(SocketState client)
{
// Get player's name.
string playerName = client.Messages[0];
// Create snake object corresponding to new player.
CreateNewPlayerSnake(playerName);
// Change callback to method that handles direction change requests.
client.Callback = ReceiveDirection;
// Store the assigned ID into the client state.
client.ID = playerCount;
// Send startup information to client.
Network.Send(client.Socket, playerCount + "\n" + boardWidth + "\n" + boardHeight + "\n");
playerCount++;
// Can't have the server modifying the clients list if it's braodcasting a message.
lock (clients)
{
clients.Add(client);
}
try
{
Network.GetData(client);
}
catch (SocketException e)
{
Debug.WriteLine("Could not receive from client due to disconnect. " + e);
client.Socket.Shutdown(SocketShutdown.Both);
client.Socket.Close();
}
}
/// <summary>
/// Receives move requests from clients.
/// </summary>
/// <param name="ss">The ss.</param>
private static void ReceiveMoveRequest(SocketState ss)
{
String request = ss.Builder.ToString();
string[] parts = Regex.Split(request, @"(?<=[\n])");
bool thrust = false;
bool fire = false;
int r = 0;
int l = 0;
foreach (string part in parts)
{
if (part.Length == 0)
{
continue;
}
if (part[part.Length - 1] != '\n')
{
break;
}
if (part.Contains("T"))
{
thrust = true;
}
if (part.Contains("F"))
{
fire = true;
}
if (part.Contains("R"))
{
r++;
}
if (part.Contains("L"))
{
l++;
}
ss.Builder.Remove(0, part.Length);
}
lock (world) {
Ship ship = world.GetShip(ss.ID);
if (ship.HP > 0)
{
if (thrust)
{
ship.Thrust = true;
}
else
{
ship.Thrust = false;
}
if (fire)
{
if (ship.Fire(shotDelay * msPerFrame))
{
world.AddProjectile(ship.id, ship.Loc.GetX(), ship.Loc.GetY(), ship.Dir.GetX(), ship.Dir.GetY());
//DB - increase ShotsFired
ship.ShotsFired++;
}
}
if (r > l)
{
ship.ToTurn = 1;
}
else if (l > r)
{
ship.ToTurn = -1;
}
else
{
ship.ToTurn = 0;
}
}
}
Network.GetData(ss);
}
/// <summary>
/// Callback for handling new clients.
/// </summary>
/// <param name="ss">The ss.</param>
private static void HandleNewClient(SocketState ss)
{
ss.CallMe = ReceiveName;
Network.GetData(ss);
}