private void RemoveFavoritePlace(IFavorite deletedFave)
{
GroupedFavoritePlaces.Remove(deletedFave);
MappableFavoritePlaces.Remove(deletedFave as IMapPoi);
RaisePropertyChanged(nameof(IsFavoritesEmpty));
}
//---These methods happen in reaction to the FavoritesChanged Event.
private void AddFavoritePlace(IFavorite place)
{
GroupedFavoritePlaces.AddSorted(place);
MappableFavoritePlaces.Add(place as IMapPoi);
RaisePropertyChanged(nameof(IsFavoritesEmpty));
}
public override async Task OnNavigatedToAsync(object parameter, NavigationMode mode, IDictionary <string, object> state)
{
_favoritesService.FavoritesChanged += FavoritesChanged;
//todo: change this from nuking/rebuilding every time to add/remove what's changed
GroupedFavoritePlaces.Clear();
MappableFavoritePlaces.Clear();
GroupedFavoriteRoutes.Clear();
MappableFavoriteRoutes.Clear();
var favorites = await _favoritesService.GetFavoritesAsync();
foreach (IPlace place in favorites.OfType <IPlace>())
{
AddFavoritePlace((IFavorite)place);
}
foreach (FavoriteRoute route in favorites.OfType <FavoriteRoute>())
{
AddFavoriteRoute(route);
}
await Task.CompletedTask;
}
private void FavoritesChanged(object sender, FavoritesChangedEventArgs args)
{
if (args.AddedFavorites?.Count > 0)
{
foreach (var favePlace in args.AddedFavorites.OfType <FavoritePlace>())
{
AddFavoritePlace(favePlace);
}
foreach (var faveRoute in args.AddedFavorites.OfType <FavoriteRoute>())
{
AddFavoriteRoute(faveRoute);
}
}
if (args.RemovedFavorites?.Count > 0)
{
foreach (var deletedFave in args.RemovedFavorites.OfType <FavoritePlace>())
{
RemoveFavoritePlace(deletedFave);
}
foreach (var deletedRoute in args.RemovedFavorites.OfType <FavoriteRoute>())
{
RemoveFavoriteRoute(deletedRoute);
}
}
if (args.EditedFavorites?.Count > 0)
{
foreach (var editedFave in args.EditedFavorites)
{
var toEdit = GroupedFavoritePlaces.FirstOrDefault(x => x.Id == editedFave.Id);
if (toEdit != null)
{
RemoveFavoritePlace(toEdit);
AddFavoritePlace(editedFave);
}
toEdit = GroupedFavoriteRoutes.FirstOrDefault(x => x.Id == editedFave.Id);
if (toEdit != null)
{
RemoveFavoriteRoute(toEdit);
AddFavoriteRoute(editedFave);
}
}
}
}
