/// <summary>
/// This method is called whenever a new command request is enqueued to be sent to
/// the IGS SERVER and also whenever
/// a command request becomes completed. The method will determine whether the channel
/// is currently free (i.e. no other command is being executed) and
/// if so, if there are any command requests in the queue,
/// the earliest one is dequeued and executed.
/// </summary>
private void ExecuteRequestFromQueue()
{
lock (_mutex)
{
if (_composure != IgsComposure.Ok)
{
return; // Cannot yet send requests.
}
if (_requestInProgress == null)
{
IgsRequest dequeuedItem;
if (_outgoingRequests.TryDequeue(out dequeuedItem))
{
if (!dequeuedItem.Unattended)
{
_requestInProgress = dequeuedItem;
}
OnOutgoingLine(dequeuedItem.Command);
_streamWriter.WriteLine(dequeuedItem.Command);
if (dequeuedItem.Unattended)
{
ExecuteRequestFromQueue();
}
}
}
}
}
/// <summary>
/// Enqueues a command to be send to IGS.
/// </summary>
/// <param name="command">The single-line command.</param>
public void MakeUnattendedRequest(string command)
{
IgsRequest request = new IgsRequest(command)
{
Unattended = true
};
_outgoingRequests.Enqueue(request);
ExecuteRequestFromQueue();
}
/// <summary>
/// Enqueues the <paramref name="command"/> to be sent over Telnet to the IGS SERVER,
/// then asynchronously receives the entirety of the server's response to this command.
/// </summary>
/// <param name="command">The command to send over Telnet.</param>
/// <returns></returns>
internal async Task <IgsResponse> MakeRequestAsync(string command)
{
IgsRequest request = new IgsRequest(command);
_outgoingRequests.Enqueue(request);
ExecuteRequestFromQueue();
IgsResponse lines = await request.GetAllLines();
lock (_mutex)
{
_requestInProgress = null;
}
ExecuteRequestFromQueue();
return(lines);
}
private void ConnectionLost()
{
LoggedIn = false;
if (Composure == IgsComposure.Disconnected)
{
return;
// Don't do this twice.
// Thread safety problems may occur. Oh well, it's networking. Hopefully they won't.
// If yes, we should eliminate the possibilities for connection loss elsewehere and maybe ensure that a single
// point of connection failure exists, possibly in OnFaulted. We'll see.
}
_client = null;
Composure = IgsComposure.Disconnected;
ConnectionEstablished = false;
foreach (var game in _availableConnectors)
{
game.Value.Disconnect();
}
Data.GamesInProgress.Clear();
Data.OnlineUsers.Clear();
this.GamesYouHaveOpened.Clear();
this.GamesBeingObserved.Clear();
_availableConnectors.Clear();
IgsRequest notYetHandledRequest;
while (_outgoingRequests.TryDequeue(out notYetHandledRequest))
{
notYetHandledRequest.Disconnect();
}
lock (_mutex)
{
_requestInProgress?.Disconnect();
_requestInProgress = null;
}
Events.RaiseDisconnected();
}