async void OnAppServiceConnectionRequestReceived(AppServiceConnection sender, AppServiceRequestReceivedEventArgs args)
{
var deferral = args.GetDeferral();
var requestData = args.Request.Message;
if (!this.IsValidRequestDataSet(requestData, out Guid characteristicUuid, out string data))
{
await args.SendResponseAsync(this.GetFailureValueSet("invalid data"));
deferral.Complete();
return;
}
var deviceId = SettingsHelper.GetValue(Constants.LastSavedDeviceIdSettingKey, string.Empty);
if (string.IsNullOrWhiteSpace(deviceId))
{
await args.SendResponseAsync(this.GetFailureValueSet("device not found"));
deferral.Complete();
return;
}
var errorMessage = await DeviceManager.ConnectAsync(deviceId, isBackgroundActivity : true);
if (!string.IsNullOrWhiteSpace(errorMessage))
{
await args.SendResponseAsync(this.GetFailureValueSet("connection failed"));
deferral.Complete();
return;
}
var result = await DeviceManager.WriteByteArrayToCharacteristicAsync(characteristicUuid, Encoding.UTF8.GetBytes(data));
await args.SendResponseAsync(this.GetSuccessValueSet());
await DeviceManager.DisconnectAsync(removeLastDeviceInfo : false);
deferral.Complete();
}