private async Task <List <ServiceVisitViewModel> > CalculateDistanceToCurrentLocationAsync(ObservableCollection <ServiceVisitViewModel> visits, Boolean isAsc)
{
var currentLocation = await LocationHelper.CurrentPositionAsync();
var currentLatitude = currentLocation.Latitude;
var currentLongitude = currentLocation.Longitude;
var result = new List <ServiceVisitViewModel>();
if (currentLatitude.Equals(0) && currentLongitude.Equals(0))
{
this.SortListViewModel.RemoveSortSetting();
await Application.Current.MainPage.DisplayAlert("Location Service Alert", "You need to turn on or give permission to your location service to enable sorting by location", "Ok");
result = visits.ToList();
}
else
{
foreach (ServiceVisitViewModel viewModel in visits)
{
viewModel.DistanceToCurrentLoc = LocationHelper.getDistanceFromLatLonInKmd(currentLatitude, currentLongitude, viewModel.PositionLat, viewModel.PostionLong);
}
if (isAsc)
{
result = visits.OrderBy(o => o.DistanceToCurrentLoc).ToList();
}
else
{
result = visits.OrderByDescending(o => o.DistanceToCurrentLoc).ToList();
}
}
this.EnableSortIcon();
return(result);
}
