async Task StartCommandsSubscription()
{
if (CommandsObservable == null || filterCommandsEnd != null)
{
return;
}
await StopCommandsSubscription();
Debug.WriteLine("CMD subscription START");
try
{
commandsSubscription = await ClientService.Current.AddCommandSubscriptionAsync(new[] { deviceId }, null, async (commandReceived) =>
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
lock (CommandsObservable)
{
if (!CommandsObservable.Any(c => c.Id == commandReceived.Command.Id))
{
CommandsObservable.Insert(0, commandReceived.Command);
}
}
});
});
}
catch (Exception ex)
{
if (!wasSubscriptionError)
{
new MessageDialog(ex.Message, "Can't subscribe to commands").ShowAsync();
wasSubscriptionError = true;
}
}
Debug.WriteLine("CMD subscription END");
}
async void StartPollCommands()
{
if (CommandsObservable == null || filterCommandsEnd != null)
{
return;
}
StopPollCommands();
commandsCancellationSource = new CancellationTokenSource();
Debug.WriteLine("CMD POLL START");
await ClientService.Current.PollCommands((commandsPolled) =>
{
foreach (Command command in commandsPolled)
{
CommandsObservable.Insert(0, command);
}
}, deviceId, CommandsObservable.Any()?(DateTime?)CommandsObservable.Max(n => n.Timestamp.Value) : filterCommandsStart, commandsCancellationSource.Token);
Debug.WriteLine("CMD POLL END");
}
