public async Task <IEnumerable <IFavoriteItem> > GetFavorites()
{
if (Items == null)
{
Items = new FavoriteSerializer().Deserialize(await LocalStorageRepository.GetItem(LocalStorageFavoritesName)).ToList();
}
return(Items.ToArray());
}
private async Task <FavoriteItem> ProcessChanges(FavoriteItem item, Func <FavoriteItem, List <FavoriteItem>, IEnumerable <FavoriteItem> > action)
{
await GetFavorites();
Items = action(item, Items).ToList();
var serializedFavorites = new FavoriteSerializer().Serialize(Items);
await LocalStorageRepository.SetItem(LocalStorageFavoritesName, serializedFavorites);
FavoritesChanged?.Invoke(this, EventArgs.Empty);
return(item);
}