checkPermissions function

Future<bool> checkPermissions(Feature feature)

Checks permissions; if a permission is missing, asks user for it. Returns false if permission has been denied, true otherwise.

If the user refused location permission too many times, redirects to the application settings screen.

Implementation

Future<bool> checkPermissions(Feature feature) async {
  switch (feature) {
    case Feature.Bluetooth:
      var status = await Permission.bluetooth.status;
      if (!status.isGranted) {
        var result = await Permission.bluetooth.request();
        if (!result.isGranted) {
          return false;
        }
      }
      break;

    case Feature.BluetoothConnect:
      var status = await Permission.bluetoothConnect.request();
      if (!status.isGranted) {
        var result = await Permission.bluetoothConnect.request();
        if (!result.isGranted) return false;
      }
      break;

    case Feature.BluetoothScan:
      var status = await Permission.bluetoothScan.request();
      if (!status.isGranted) {
        var result = await Permission.bluetoothScan.request();
        if (!result.isGranted) return false;
      }
      break;

    case Feature.Location:
      var locationStatus = await Permission.location.status;
      if (!locationStatus.isGranted) {
        var result = await Permission.location.request();
        if (!result.isGranted) {
          if (Platform.isAndroid &&
              !await Permission.location.shouldShowRequestRationale) {
            openAppSettings();
          }

          return false;
        }
      }
      break;

    case Feature.LocationAlways:
      var locationStatus = await Permission.locationAlways.status;
      if (!locationStatus.isGranted) {
        var result = await Permission.locationAlways.request();
        if (!result.isGranted) {
          if (Platform.isAndroid &&
              !await Permission.locationAlways.shouldShowRequestRationale) {
            openAppSettings();
          }

          return false;
        }
      }
      break;

    case Feature.LocationWhenInUse:
      var locationStatus = await Permission.locationWhenInUse.status;
      if (!locationStatus.isGranted) {
        var result = await Permission.locationWhenInUse.request();
        if (!result.isGranted) {
          if (Platform.isAndroid &&
              !await Permission.locationWhenInUse.shouldShowRequestRationale) {
            openAppSettings();
          }

          return false;
        }
      }
      break;

    default:
      throw new UnimplementedError(
          "Cannot check permissions with this feature.");
  }

  return true;
}