public MainPageViewModel()
{
if (App.Current.Properties.ContainsKey("defaultPrinter"))
{
string guidName = App.Current.Properties["defaultPrinter"].ToString();
_connectedDisposable = _centralManager.GetConnectedPeripherals().Subscribe(scanResult =>
{
scanResult.ToList().ForEach(
item =>
{
if (!string.IsNullOrEmpty(item.Name) && item.Name == guidName)
{
Peripherals.Add(item);
_centralManager.StopScan();
Device.BeginInvokeOnMainThread(async() =>
{
await App.Current.MainPage.Navigation.PushAsync(new PrintPage(item));
SelectedPeripheral = null;
});
_scanDisposable?.Dispose();
IsScanning = _centralManager.IsScanning;
}
});
_connectedDisposable?.Dispose();
});
if (_centralManager.IsScanning)
{
_centralManager.StopScan();
}
if (_centralManager.Status == Shiny.AccessState.Available && !_centralManager.IsScanning)
{
_scanDisposable = _centralManager.ScanForUniquePeripherals().Subscribe(scanResult =>
{
if (!string.IsNullOrEmpty(scanResult.Name) && !Peripherals.Contains(scanResult))
{
Peripherals.Add(scanResult);
Device.BeginInvokeOnMainThread(async() =>
{
await App.Current.MainPage.Navigation.PushAsync(new PrintPage(scanResult));
SelectedPeripheral = null;
});
}
});
}
}
else
{
GetDeviceListCommand = new Command(GetDeviceList);
SetAdapterCommand = new Command(async() => await SetAdapter());
CheckPermissionsCommand = new Command(async() => await CheckPermissions());
CheckPermissionsCommand.Execute(null);
}
}
/// <summary>
/// This method wraps the traditional scan, but waits for the bleManager to be ready before initiating scan
/// </summary>
/// <param name="bleManager">The bleManager to scan with</param>
/// <param name="restart">Stops any current scan running</param>
/// <param name="config">ScanConfig parameters you would like to use</param>
/// <returns></returns>
public static IObservable <ScanResult> Scan(this IBleManager bleManager, ScanConfig?config = null, bool restart = false)
{
if (restart && bleManager.IsScanning)
{
bleManager.StopScan(); // need a pause to wait for scan to end
}
return(bleManager.Scan(config));
}
public ScanViewModel(IBleManager bleManager)
{
this.Start = ReactiveCommand.CreateFromTask(async() =>
{
bleManager
//.ScanForUniquePeripherals() // this gives you the peripheral, not the scan results
.Scan()
.SubOnMainThread(result =>
// scan results duplicate per device as the RSSI and device name is read/changed
this.Results.Add(result)
);
});
this.Stop = ReactiveCommand.Create(() => bleManager.StopScan());
}
void RestartScan()
{
Debug.WriteLine("Scanning restarted");
Devices.Clear();
ble.StopScan();
ble.ScanForUniquePeripherals().Subscribe(async device => {
// TODO: Actually look at advertising data.
if (device.Name == "Passing Link")
{
Debug.WriteLine($"Found device: {device.Uuid}");
Devices.Add(new DeviceModel {
Name = device.Name, Id = device.Uuid, Handle = device
});
}
});
}
