/// <summary>
/// Asynchronously connects to a server and returns an instance of <see cref="Client"/>
/// </summary>
/// <param name="serverUri">The server to connect</param>
/// <returns>A task resolving to a client instance</returns>
public static async Task <Client> ConnectNewAsync(Uri serverUri)
{
if (serverUri == null)
{
throw new ArgumentNullException(nameof(serverUri));
}
if (serverUri.Scheme != "ws")
{
throw new ArgumentException("URI must be a websocket URI");
}
var socket = new ClientWebSocket();
try
{
await socket.ConnectAsync(serverUri, CancellationToken.None);
}
catch
{
;
}
// TODO: right now, we're prompting the server to give us our client ID.
// This kinda misses the point of sockets.
// The server should give us the ID straight up, but we might miss the immediate message
// because we're connecting the socket first, then attaching a messenger.
// So: let's make the messenger async-attachable, and then we can ensure that we get immedately-
// sent messages.
var clientIdCompletionSource = new TaskCompletionSource <int>();
void Messenger_FirstMessage(object sender, WebsocketReceiveEventArgs args)
{
((WebsocketMessenger)sender).MessageReceived -= Messenger_FirstMessage;
try
{
clientIdCompletionSource.SetResult(int.Parse(args.Message));
}
catch (Exception ex)
{
clientIdCompletionSource.SetException(ex);
}
}
var m = new WebsocketMessenger(socket);
m.MessageReceived += Messenger_FirstMessage;
var output = new Client(m, await clientIdCompletionSource.Task);
return(output);
}
/// <summary>
/// Creates a new instace of <see cref="Client"/>
/// </summary>
/// <param name="serverUri">The URI identifying the server</param>
Client(WebsocketMessenger messenger, int clientId)
{
this.messenger = messenger;
this.commandBuilder = new Commando.Builder(clientId);
messenger.MessageReceived += Messenger_MessageReceived;
}
