void CreateRoomReceived(Packet receivedPacket, ChatClientData client)
{
var createRoom = PacketUtilities.GetProtocolObject <ProtocolObject.CreateRoom>(receivedPacket);
bool _success = true;
string _message = "";
if (RoomExistsByName(createRoom.roomName))
{
_success = false;
_message = "A room with the given name alredy exists.";
}
ChatLog.Info("*** CREATE_ROOM received --- name -> " + createRoom.roomName + " --- host -> " + createRoom.roomHost + " --- success -> " + _success);
if (!_success)
{
ChatLog.Info(" REASON -> " + _message);
}
if (_success)
{
CreateRoom(createRoom.roomName, createRoom.roomHost, false); //fill dala structure
}
byte[] response = PacketUtilities.Build(new ProtocolObject.RoomCreated()
{
roomName = createRoom.roomName,
roomHost = createRoom.roomHost,
success = _success,
message = _message
});
client.Send(response);
}
void AddConnectedClient(ChatClientData client)
{
clientsConnected.Add(client);
clientsConnectedDic.Add(client.Socket, client);
ChatLog.Info("** New client connected -> " + client.Socket.RemoteEndPoint.ToString());
}
void JoinReceived(Packet receivedPacket, ChatClientData client)
{
var join = PacketUtilities.GetProtocolObject <ProtocolObject.Join>(receivedPacket);
if (client.HasJoined || ClientExists(join.name))
{
ChatLog.Info("-- Client alredy joined. Refusing incoming request -> " + client.Name);
var bytes = PacketUtilities.Build(new ProtocolObject.ClientJoined()
{
succesful = false,
message = "Client alredy joined",
name = join.name
});
client.Send(bytes);
ChatLog.Info("first byte is " + bytes[0]);
}
else
{
client.HasJoined = true;
client.Name = join.name;
ChatLog.Info("-- New client joined -> " + client.Name);
var bytes = PacketUtilities.Build(new ProtocolObject.ClientJoined()
{
succesful = true,
message = "Welcome!",
name = join.name
});
//send back to all joined clients that a new client is connected
SendMessageToAllJoined(bytes);
}
}
void InviteClientReceived(Packet receivedPacket, ChatClientData client)
{
var invite = PacketUtilities.GetProtocolObject <ProtocolObject.InviteClient>(receivedPacket);
bool _success = true;
string _message = "";
//room exists
if (!RoomExistsByName(invite.roomName))
{
_success = false;
_message = "Room does not exists";
}
else if (!RoomHostMatch(invite.roomName, client.Name)) //not the host, can't invite
{
_success = false;
_message = "You're not the host, you can't invite";
}
else if (!ClientExists(invite.newUserName))
{
_success = false;
_message = "User does not exists";
}
ChatLog.Info("INVITE_CLIENT received success? -> " + _success + " --- room name -> " + invite.roomName + " --- message -> " + _message);
ChatRoom room = RoomFromName(invite.roomName);
byte[] response = PacketUtilities.Build(new ProtocolObject.RoomJoined()
{
success = _success,
message = _message,
roomName = invite.roomName,
newUserName = invite.newUserName,
sender = client.Name,
members = room != null ? room.Members : new List <string>()
{
}
});
//sender response anyway
client.Send(response);
if (_success)
{
//positive notify all clients
room.Members.Add(invite.newUserName); //add new user
//notify host
foreach (var c in room.Members)
{
ChatClientData chatClient = GetClientByName(c);
chatClient.Send(response);
}
}
}
void MessageSentReceived(Packet receivedPacket, ChatClientData client)
{
var message = PacketUtilities.GetProtocolObject <ProtocolObject.Message>(receivedPacket);
//TO DO IMPLEMENT A MESSAGE FOR NOT DELIVERED MESSAGES
ChatLog.Info("To -> " + message.destinationUser + " --- Message -> " + message.message); //print anyway
bool isToRoom = message.isRoom;
//if not exist ignore the message
if (!isToRoom && !ClientExists(message.destinationUser))
{
ChatLog.Info("-- Message ignored because the destination user is not connected -> " + message.destinationUser);
return;
}
if (!isToRoom && !client.HasJoined)
{
ChatLog.Info("-- Rejected MESSAGE command by a not joined client -> " + client.Socket.RemoteEndPoint.ToString());
return;
}
if (isToRoom && !RoomExistsByName(message.destinationUser))
{
ChatLog.Info("-- Rejected MESSAGE command to a room because the room does not exists -> " + message.destinationUser);
return;
}
byte[] response = PacketUtilities.Build(new ProtocolObject.MessageReceived()
{
senderUser = client.Name,
roomName = message.destinationUser,
message = message.message //LOL
});
if (isToRoom)
{
ChatRoom room = RoomFromName(message.destinationUser);
foreach (var m in room.Members)
{
ChatClientData c = GetClientByName(m);
c.Send(response);
ChatLog.Info("MESSAGE SENT TO -> " + m);
}
var host = GetClientByName(room.Host);
host.Send(response);
ChatLog.Info("MESSAGE SENT TO -> " + host.Name);
}
else
{
//send message to the other client and confirm
var destinationClient = GetClientByName(message.destinationUser);
if (destinationClient != null)
{
destinationClient.Socket.Send(response);
}
}
}
void RemoveConnectedClient(ChatClientData client, bool closeSocket = true)
{
if (closeSocket)
{
client.Socket.Close();
}
clientsConnected.Remove(client);
clientsConnectedDic.Remove(client.Socket);
}
void CloseRoomReceived(Packet receivedPacket, ChatClientData client)
{
var closeRoom = PacketUtilities.GetProtocolObject <ProtocolObject.CloseRoom>(receivedPacket);
bool _success = true;
string _message = "";
//room exists
if (!RoomExistsByName(closeRoom.roomName))
{
_success = false;
_message = "A room with the given name does not exist.";
}
//you're the host
else if (!RoomHostMatch(closeRoom.roomName, client.Name))
{
_success = false;
_message = "You're not the host, you can't close the room";
}
string roomHost = "Nothing";
if (activeRoomsByName.ContainsKey(closeRoom.roomName))
{
roomHost = activeRoomsByName[closeRoom.roomName].Host;
}
ChatLog.Info("CLOSE_ROOM received success? -> " + _success + " --- room name -> " + closeRoom.roomName + " --- message -> " + _message);
byte[] response = PacketUtilities.Build(new ProtocolObject.RoomClosed()
{
roomName = closeRoom.roomName,
roomHost = roomHost, //set host then the host client can decide if he's the host or not
success = _success,
message = _message
});
client.Send(response);
if (_success)
{
//if succesfully closed, notify all memebers
var room = RoomFromName(closeRoom.roomName);
foreach (var c in room.Members)
{
ChatClientData chatClient = GetClientByName(c);
chatClient.Send(response);
}
}
if (_success)
{
DeleteRoom(closeRoom.roomName);
}
}
void AskAllConnectedReceived(Packet receivedPacket, ChatClientData client)
{
var packet = PacketUtilities.GetProtocolObject <ProtocolObject.Join>(receivedPacket);
if (!client.HasJoined)
{
ChatLog.Info("-- Rejected MESSAGE command by a not joined client -> " + client.Socket.RemoteEndPoint.ToString());
return;
}
client.Socket.Send(PacketUtilities.Build(new ProtocolObject.GetAllConnected()
{
names = (from c in clientsConnected where c.Name != client.Name && c.Name != "" select c.Name).ToArray() //empty names are not joined
}));
}
void LeaveRoomReceived(Packet receivedPacket, ChatClientData client)
{
var leave = PacketUtilities.GetProtocolObject <ProtocolObject.LeaveRoom>(receivedPacket);
bool _success = true;
string _message = "";
ChatRoom room = RoomFromName(leave.roomName);
if (!RoomExistsByName(leave.roomName))
{
_success = false;
_message = "Room does not exists";
}
//is client in the requested room
else if (room != null && !room.Members.Contains(client.Name))
{
_success = false;
_message = "Client is not int he room";
}
//client side, client shouldn't allow the leave if you're the host, just close room
//build response
byte[] response = PacketUtilities.Build(new ProtocolObject.RoomLeft()
{
success = _success,
roomName = leave.roomName,
userName = client.Name
});
client.Send(response);
//is success notify all joined
if (_success)
{
room.Members.Remove(client.Name); //remove user user
GetClientByName(room.Host).Send(response); //host is not in the members
foreach (var m in room.Members)
{
ChatClientData c = GetClientByName(m);
c.Send(response);
}
}
}
void QuitReceived(Packet receivedPacket, ChatClientData client)
{
var quit = PacketUtilities.GetProtocolObject <ProtocolObject.Quit>(receivedPacket);
if (!client.HasJoined)
{
ChatLog.Info("-- Rejected QUIT command by a not joined client -> " + client.Socket.RemoteEndPoint.ToString());
return;
}
ChatLog.Info("** Client disconnected -> " + client.Name);
ChatLog.Info("** Reason -> Wants to quit");
var bytes = PacketUtilities.Build(new ProtocolObject.ClientLeft()
{
name = client.Name,
message = "Good bye!"
});
//notify all client that this client is gone
SendMessageToAllJoined(bytes);
RemoveConnectedClient(client);
}
/// <summary>
/// Start the server systems and threads
/// </summary>
public void Start(string bindingAddress = "127.0.0.1", int port = 2001)
{
//register callback
tcpLayer.onIncomingConnectionAccepted += (socket) =>
{
ChatLog.Info("connection added");
ChatClientData client = new ChatClientData()
{
Socket = socket,
ReceiveBuffer = new byte[PacketUtilities.PACKET_SIZE],
HasJoined = false,
Name = null
};
AddConnectedClient(client);
};
tcpLayer.Bind(bindingAddress, port);
tcpLayer.StartListen();
//start receiving thread
var receivingThread = new Thread(() =>
{
while (!exit)
{
tcpLayer.Accept();
if (clientsConnected.Count <= 0) //no one is connected
{
continue;
}
//build list to check readable sockets
//(every frame needs to be rebuilt because the list itself will be modified every frame by this method)
BuildReadableClientsList();
//filter clients that need to be read
Socket.Select(readCheck, writeCheck, errorCheck, 10000);
//iterates through those clients and check for message
foreach (Socket socket in readCheck)
{
var client = this.clientsConnectedDic[socket];
int receivedBytesAmount = 0;
try
{
receivedBytesAmount = tcpLayer.Receive(client.Socket, client.ReceiveBuffer);
}
catch (SocketException ex)
{
ChatLog.Info("** Client disconnected -> " + client.Name);
ChatLog.Info("** Reason -> " + ex.Message);
RemoveConnectedClient(client);
//notify all client that this client is gone
//SendMessageToAllJoined();
continue;
}
if (receivedBytesAmount <= 0) //no data received
{
continue;
}
//parse packet
Packet receivedPacket = PacketUtilities.Read(client.ReceiveBuffer);
var command = (Protocol)receivedPacket.command;
if (!this.packetsSupportedMap.Has(command))
{
continue;
}
scheduler.Schedule(() =>
{
this.packetsSupportedMap[command](receivedPacket, client); //invoke the callback in the scheduled thread
});
}
}
//send quit to all clients because the server is dead
SendMessageToAllJoined(PacketUtilities.Build(new ProtocolObject.ServerClosed()
{
message = "Server closed"
}));
}); //end of lambda
receivingThread.Start();
var commandsThread = new Thread(() =>
{
while (!exit)
{
ChatLog.Info("** Waiting command **");
string command = Console.ReadLine();
scheduler.Schedule(() =>
{
var executed = CommandExecutor.Execute(command, scheduler);
if (!executed)
{
ChatLog.Warning("Command not executed: Unexisting command -> " + command);
}
});
}
}); //end of lambda
commandsThread.Start();
//main thread
while (!exit)
{
scheduler.Update();
}
}
