async void HandleDataReceived(object sender, object e)
{
var container = e as JContainer;
string type = (string)container["Type"];
if (type == typeof(EvalRequestMessage).Name)
{
await HandleEvalRequest(container.ToObject <EvalRequestMessage>());
}
else if (type == typeof(ErrorMessage).Name)
{
var errorMessage = container.ToObject <ErrorMessage>();
await uiToolkit.RunInUIThreadAsync(async() =>
{
errorViewModel.SetError("Oh no! An exception!", errorMessage.Exception);
await previewer.NotifyError(errorViewModel);
});
}
}
async Task HandleEvalRequest(EvalRequest request)
{
EvalResponse evalResponse = new EvalResponse();
EvalResult result;
try
{
result = await vm.Eval(request, mainScheduler, CancellationToken.None);
if (result.HasResult)
{
var tcs = new TaskCompletionSource <bool>();
Xamarin.Forms.Device.BeginInvokeOnMainThread(async() =>
{
try
{
await previewer.Preview(result);
tcs.SetResult(true);
}
catch (Exception ex)
{
errorViewModel.SetError("Oh no! An exception!", ex);
await previewer.NotifyError(errorViewModel);
tcs.SetException(ex);
}
});
await tcs.Task;
}
else
{
Xamarin.Forms.Device.BeginInvokeOnMainThread(async() =>
{
errorViewModel.SetError("Oh no! An evaluation error!", result);
await previewer.NotifyError(errorViewModel);
});
}
}
catch (Exception ex)
{
Log.Exception(ex);
}
}