public async Task <SocketMessage> ListenToReplyAsync(OrikivoCommandContext Context, ICriteria <SocketMessage> criteria, TimeSpan?timeout = null)
{
timeout = timeout ?? _timeout;
TaskCompletionSource <SocketMessage> trigger = new TaskCompletionSource <SocketMessage>();
async Task Listener(SocketMessage message)
{
bool ensured = await criteria.EnsureAsync(Context, message).ConfigureAwait(false);
if (ensured)
{
trigger.SetResult(message);
}
}
Context.Client.MessageReceived += Listener;
Task <SocketMessage> handler = trigger.Task;
Task delay = Task.Delay(timeout.Value);
Task task = await Task.WhenAny(handler, delay).ConfigureAwait(false);
Context.Client.MessageReceived -= Listener;
if (task == handler)
{
return(await handler.ConfigureAwait(false));
}
else
{
return(null);
}
}