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($"{nickname} connected ({endpoint.Address}:{endpoint.Port})");
ClientConnected?.Invoke(newClient);
}
private void HandleCall(Client sender, Message message)
{
var calledNickname = message.GetTextContent();
var calledUser = GetClient(calledNickname);
var callRequest = new Database.Entities.CallRequest
{
State = CallRequestState.NoResponse
};
using (var database = new RozmawiatorDb())
{
var callee =
database.Users.Select(u => new { u.Id, u.UserName }).FirstOrDefault(u => u.UserName == calledNickname);
var caller =
database.Users.Select(u => new { u.Id, u.UserName })
.FirstOrDefault(u => u.UserName == sender.Nickname);
callRequest.CalleeId = callee?.Id ?? Guid.Empty;
callRequest.CallerId = caller?.Id ?? Guid.Empty;
}
Debug($"{sender.Nickname} is trying to call {calledNickname} ({sender.EndPoint.Address}:{sender.EndPoint.Port} -> ?)");
if (calledUser == null)
{
Debug($"{sender.Nickname} was trying to call {calledNickname}, but {calledNickname} is offline.");
Send(sender, Message.CallResponse(0, 0, Message.CallResponseType.TargetIsOffline));
SaveCall(callRequest);
return;
}
var conversation = GetInitiatedConversation(sender);
if (conversation == null)
{
var currentConversation = GetConversation(sender);
currentConversation?.Disconnect(sender);
conversation = NewConversation(sender);
}
SaveCall(callRequest);
conversation.AddRequest(calledUser);
conversation.SendRequests();
}
private void HandleCallResponse(Client sender, Message message)
{
var callingClient = GetClient(message.Receiver);
if (callingClient == null)
{
Debug($"{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();
}