public IObservable <BluetoothDeviceStatus> Watch(BluetoothDevice device)
{
return(Observable.Create <BluetoothDeviceStatus>(observer =>
{
BluetoothDeviceStatus?lastStatus = null;
return Observable.Timer(TimeSpan.Zero, TimeSpan.FromSeconds(UpdateIntervalInSeconds), TaskPoolScheduler.Default).Subscribe(_ =>
{
try
{
var discoverDevicesInRange = _bluetoothDeviceProvider.DiscoverDevicesInRange();
discoverDevicesInRange.Wait();
var devices = discoverDevicesInRange.Result;
var newStatus = BluetoothDeviceStatus.None;
if (devices.Any(d => d.DeviceName == device.DeviceName))
{
newStatus = BluetoothDeviceStatus.Available;
}
if (lastStatus == null || lastStatus.Value != newStatus)
{
lastStatus = newStatus;
observer.OnNext(newStatus);
}
}
catch (Exception e)
{
}
});
}));
}
public async void DiscoverDevices()
{
try
{
IsLoading = true;
Devices = await _bluetoothDeviceProvider.DiscoverDevicesInRange();
}
catch (Exception ex)
{
MessageBox.Show("Error while discovering nearby devices");
}
finally
{
IsLoading = false;
}
}