public async void StartServer()
{
// Start listener which accepts connections on the specific port
TcpListener listener = new TcpListener(IPAddress.Any, _port);
listener.Start();
LogMessage("Start listening...");
while (_isListening)
{
// Wait for a connection
TcpClient clientSocket = await listener.AcceptTcpClientAsync();
LogMessage("New Client accepted");
// Wrap this socket into a specific class which handles requests
AcceptedClient client = new AcceptedClient(clientSocket, this);
client.SendWelcomeMessage();
client.Name = GetTemporaryClientName();
// Start thread for handling requests and messages
Thread clientThread = new Thread(client.WaitForRequest);
client.CurrentThread = clientThread;
clientThread.Start();
}
}
public void BroadcastMessage(AcceptedClient xSender, string xMessage)
{
string message = $"-> {xSender.Name}: {xMessage}";
foreach (var iiClient in _clients.Where(x => x.Key.Equals(xSender.Name) == false))
{
iiClient.Value.WriteMessage(message);
}
}
private static void OnClientConnected(object sender, ClientConnectedEventArgs args)
{
Console.WriteLine($"Client '{args.Socket.RemoteEndPoint}' connected");
var acceptedClient = new AcceptedClient(args.Socket);
acceptedClient.ClientDisconnected += OnClientDisconnected;
acceptedClient.Start();
}
public void HandleCommand(AcceptedClient xClient, string xMessage)
{
string command = xMessage.Split(' ')[0].ToLower();
string message = "";
string target = "";
switch (command)
{
case "/help":
message = CommandHandler.GetHelpMessage();
xClient.WriteMessage(message);
break;
case "/getuser":
message = CommandHandler.GetUserMessage(_clients.Keys.ToList());
xClient.WriteMessage(message);
break;
case "/login":
string username = CommandHandler.ExtractUsernameFromLogin(xMessage);
if (xClient.IsLoggedIn)
{
message = CommandHandler.GetErrorAlreadyLoggedIn();
xClient.WriteMessage(message);
}
else if (IsUsernameValid(username) == false)
{
message = CommandHandler.GetErrorUsernameNotAllowed(username);
xClient.WriteMessage(message);
}
else if (_clients.ContainsKey(username))
{
message = CommandHandler.GetErrorUserExisting();
xClient.WriteMessage(message);
}
else
{
_clients.Add(username, xClient);
xClient.IsLoggedIn = true;
xClient.Name = username;
message = CommandHandler.GetLoginConfirmedMessage(username);
xClient.WriteMessage(message);
}
break;
case "/whisper":
string messageTarget = CommandHandler.ExtractWhisperMessage(xClient.Name, xMessage, out target);
if (string.IsNullOrWhiteSpace(target) || string.IsNullOrWhiteSpace(messageTarget))
{
message = CommandHandler.GetErrorCommandNotRecognized();
xClient.WriteMessage(message);
}
else if (_clients.ContainsKey(target) == false)
{
message = CommandHandler.GetErrorUserNotExisting(target);
xClient.WriteMessage(message);
}
else
{
message = CommandHandler.GetWhisperConfirmed(target);
_clients[target].WriteMessage(messageTarget);
xClient.WriteMessage(message);
}
break;
case "/logoff":
xClient.IsLoggedIn = false;
xClient.WriteMessage("Logoff received. You're logged off from the server!");
_clients.Remove(xClient.Name);
xClient.StopClient();
break;
default:
message = CommandHandler.GetErrorCommandNotRecognized();
xClient.WriteMessage(message);
break;
}
}
