private void HandleHello(IPEndPoint endpoint, Message message)
{
var client = GetClient(endpoint);
if (client != null)
{
Debug($"Client with endpoint {endpoint.Address}:{endpoint.Port} already on list ({client.Nickname}).");
return;
}
var nickname = message.GetTextContent();
using (var database = new RozmawiatorDb())
{
var user = database.Users.FirstOrDefault(u => u.UserName == nickname);
if (user == null)
{
Debug($"Client {nickname} with endpoint {endpoint.Address}:{endpoint.Port} does not exist in database.");
return;
}
}
var newClient = AddClient(endpoint, nickname);
Send(newClient, Message.Hello(Configuration.Host.Name));
Debug($"{nickname} connected ({endpoint.Address}:{endpoint.Port})");
ClientConnected?.Invoke(newClient);
}
private void OnNewMessage(Client client, Message message)
{
switch (message.Type)
{
case Message.MessageType.Hello:
case Message.MessageType.Bye:
case Message.MessageType.KeepAlive:
case Message.MessageType.Call:
break;
case Message.MessageType.DirectText:
HandleDirectText(message);
break;
case Message.MessageType.CallRequest:
case Message.MessageType.CallResponse:
break;
case Message.MessageType.HelloConversation:
case Message.MessageType.ByeConversation:
case Message.MessageType.CloseConversation:
case Message.MessageType.Text:
case Message.MessageType.Audio:
break;
}
}
public void Send(IEnumerable <Client> receivers, Message message)
{
foreach (var client in receivers)
{
message.Receiver = client.Id;
Send(client, message);
}
}
private void HandleBye(Client sender, Message message)
{
if (sender == null)
{
return;
}
Debug($"{sender.Nickname} disconnecting ({sender.EndPoint.Address}:{sender.EndPoint.Port})");
RemoveClient(sender);
}
public void SendAsClient(Client sender, IEnumerable <Client> receivers, Message message)
{
message.Sender = sender.Id;
foreach (var client in receivers)
{
message.Receiver = client.Id;
Send(client, message);
}
}
private void ListenLoop()
{
while (State == ListenerState.Listening)
{
var endpoint = new IPEndPoint(0, 0);
var msg = _listener.Receive(ref endpoint);
Task.Factory.StartNew(() => HandleMessage(endpoint, Message.FromBytes(msg)));
}
}
private void HandleMessage(IPEndPoint endpoint, Message message)
{
var sender = GetClient(endpoint);
message.Sender = sender?.Id ?? 0;
var conversation = GetConversation(sender);
switch (message.Type)
{
case Message.MessageType.Hello:
HandleHello(endpoint, message);
break;
case Message.MessageType.Bye:
HandleBye(sender, message);
break;
case Message.MessageType.KeepAlive:
HandleKeepAlive(sender, message);
break;
case Message.MessageType.Call:
HandleCall(sender, message);
break;
case Message.MessageType.CallRequest:
break;
case Message.MessageType.CallResponse:
HandleCallResponse(sender, message);
break;
case Message.MessageType.Text:
case Message.MessageType.Audio:
case Message.MessageType.HelloConversation:
case Message.MessageType.ByeConversation:
if (sender != null)
{
conversation?.HandleMessage(message);
}
break;
case Message.MessageType.DirectText:
HandleDirectText(sender, message);
break;
default:
throw new ArgumentOutOfRangeException();
}
NewMessage?.Invoke(endpoint, message);
}
private async void HandleDirectText(Message message)
{
var sender = message.GetDirectTextNickname();
var content = message.GetDirectTextContent();
var conversation =
PassiveConversationService.Conversations.FirstOrDefault(c => c.Participants.Select(p => p.Nickname).Contains(sender)) ??
await ConversationService.AddConversation(ConversationType.Passive, UserService.LoggedUser.Nickname, sender);
var conversationControl = ConversationControls.FirstOrDefault(p => p.PassiveConversation == conversation);
if (conversationControl == null)
{
conversationControl = new ConversationControl
{
PassiveConversation = conversation
};
Dispatcher.Invoke(() =>
{
ConversationList.Items.Add(conversationControl);
});
}
if (SelectedConversationControl.PassiveConversation != conversationControl.PassiveConversation)
{
conversationControl.Notify();
}
var messageDisplay = MessageDisplays.FirstOrDefault(m => m.Conversation == conversation);
if (messageDisplay == null)
{
messageDisplay = new MessageDisplayControl(conversation);
Dispatcher.Invoke(() =>
{
MessageDisplays.Add(messageDisplay);
});
return;
}
Dispatcher.Invoke(() =>
{
var msg = new TextMessage(content, DateTime.Now, UserService.GetUser(sender));
conversation.Messages.Add(msg);
messageDisplay.AddMessageControl(msg);
});
}
private void HandleCall(Client sender, Message message)
{
var calledNickname = message.GetTextContent();
var calledUser = GetClient(calledNickname);
var callRequest = new Database.Entities.CallRequest
{
State = CallRequestState.NoResponse
};
using (var database = new RozmawiatorDb())
{
var callee =
database.Users.Select(u => new { u.Id, u.UserName }).FirstOrDefault(u => u.UserName == calledNickname);
var caller =
database.Users.Select(u => new { u.Id, u.UserName })
.FirstOrDefault(u => u.UserName == sender.Nickname);
callRequest.CalleeId = callee?.Id ?? Guid.Empty;
callRequest.CallerId = caller?.Id ?? Guid.Empty;
}
Debug($"{sender.Nickname} is trying to call {calledNickname} ({sender.EndPoint.Address}:{sender.EndPoint.Port} -> ?)");
if (calledUser == null)
{
Debug($"{sender.Nickname} was trying to call {calledNickname}, but {calledNickname} is offline.");
Send(sender, Message.CallResponse(0, 0, Message.CallResponseType.TargetIsOffline));
SaveCall(callRequest);
return;
}
var conversation = GetInitiatedConversation(sender);
if (conversation == null)
{
var currentConversation = GetConversation(sender);
currentConversation?.Disconnect(sender);
conversation = NewConversation(sender);
}
SaveCall(callRequest);
conversation.AddRequest(calledUser);
conversation.SendRequests();
}
private void HandleKeepAlive(Client sender, Message message)
{
//Debug($"{sender.Nickname} is alive ({sender.EndPoint.Address}:{sender.EndPoint.Port})");
sender?.KeepAlive();
}
private void HandleDirectText(Client sender, Message message)
{
if (sender == null)
{
return;
}
var targetNickname = message.GetDirectTextNickname();
var targetClient = GetClient(targetNickname);
if (targetClient == null)
{
Debug($"Undelivered message from {sender.Nickname} to {targetNickname}, target client offline.");
return;
}
using (var database = new RozmawiatorDb())
{
var conversation =
database.Conversations.FirstOrDefault(
c => c.ConversationParticipants.Any(cp => cp.User.UserName == targetNickname));
var senderUser = database.Users.FirstOrDefault(u => u.UserName == sender.Nickname);
if (senderUser == null)
{
SendAsClient(sender, targetClient, message);
return;
}
if (conversation == null)
{
var targetUser = database.Users.FirstOrDefault(u => u.UserName == targetNickname);
if (targetUser == null)
{
SendAsClient(sender, targetClient, message);
return;
}
conversation = new Database.Entities.Conversation
{
Type = ConversationType.Passive,
ConversationParticipants = new[]
{
new ConversationParticipant {
User = senderUser
},
new ConversationParticipant {
User = targetUser
}
}
};
database.Conversations.Add(conversation);
}
var msg = new Database.Entities.Message
{
Conversation = conversation,
Content = message.GetDirectTextContent(),
Timestamp = DateTime.Now,
Sender = senderUser
};
database.Messages.Add(msg);
database.SaveChanges();
}
var forwardMessage = new Message().DirectText(sender.Nickname, message.GetDirectTextContent());
//SendAsClient(sender, targetClient, message);
SendAsClient(sender, targetClient, forwardMessage);
}
private void OnNewCallRequest(Client client, ClientApi.CallRequest callRequest, Message message)
{
var request = new CallRequest
{
Id = Guid.Empty,
CallerId = message.Sender,
Caller = callRequest.CallerNickname,
Callee = UserService.LoggedUser.Nickname,
State = CallRequestState.NoResponse
};
DisplayCallRequest(request);
}
public void SendAsClient(Client sender, Client receiver, Message message)
{
message.Sender = sender.Id;
message.Receiver = receiver.Id;
Send(receiver, message);
}
public void Send(Client receiver, Message message)
{
message.Receiver = receiver.Id;
Send(receiver, message.GetBytes());
}
private void OnConversationClose(ClientApi.Conversation conversation, Message message)
{
Dispatcher.Invoke(EndConversation);
}
private void OnNewAudioSamples(ClientApi.Conversation conversation, RemoteClient remoteClient, Message message)
{
Player.AddSamples(message.Content, 0, message.Content.Length);
}
private void HandleCallResponse(Client sender, Message message)
{
var callingClient = GetClient(message.Receiver);
if (callingClient == null)
{
Debug($"{sender.Nickname} was trying to respond to call, but caller is offline.");
Send(sender, Message.CallResponse(0, 0, Message.CallResponseType.TargetIsOffline));
return;
}
var conversation = GetConversation(callingClient);
if (conversation == null)
{
Debug($"{sender.Nickname} was trying to respond to {callingClient.Nickname}'s call, but the conversation no longer exists.");
Send(sender, Message.CallResponse(0, 0, Message.CallResponseType.ExpiredCall));
return;
}
var request = conversation.GetRequest(callingClient, sender);
if (request == null)
{
Debug($"{sender.Nickname} was trying to respond to {callingClient.Nickname}'s call, but the request no longer exists.");
Send(sender, Message.CallResponse(0, 0, Message.CallResponseType.ExpiredCall));
return;
}
var response = request.ResolveRequest(message);
switch (response)
{
case Message.CallResponseType.RequestDenied:
Debug($"{sender.Nickname} declined {callingClient.Nickname}'s call.");
break;
case Message.CallResponseType.RequestAccepted:
var currentConversation = GetConversation(sender);
currentConversation?.Disconnect(sender);
conversation.Join(sender);
Debug($"{sender.Nickname} joined {callingClient.Nickname}'s conversation.");
break;
default:
Debug($"Exception: Caller: {callingClient.Nickname}, Target: {sender.Nickname} - unexpected message {response}");
break;
}
using (var database = new RozmawiatorDb())
{
var content = message.GetTextContent();
var lastTimestamp =
database.CallRequests.Where(
c => c.Callee.UserName == sender.Nickname).Max(c => c.Timestamp);
/*
* var callRequest =
* database.CallRequests.LastOrDefault(
* c => c.Callee.UserName == sender.Nickname && c.Caller.UserName == content);
*/
var callRequest = database.CallRequests.FirstOrDefault(c => c.Timestamp == lastTimestamp);
if (callRequest != null)
{
callRequest.State = response == Message.CallResponseType.RequestAccepted
? CallRequestState.RequestAccepted
: CallRequestState.RequestDenied;
database.SaveChanges();
}
}
SendAsClient(sender, callingClient, Message.CallResponse(0, 0, response));
conversation.RemoveRequests();
}
public void Broadcast(Message message)
{
message.Sender = 0;
message.Receiver = 0;
Send(_clients, message);
}
