public async Task<List<Favorite>> AddAsync(Favorite toAdd)
{
var favorites = await LoadAsync().ConfigureAwait(false);
if (null != favorites)
{
if (null != FindFavorite(favorites, toAdd)) return favorites; // Do not add twice to the list
}
else
{
favorites = new List<Favorite>();
}
favorites.Add(toAdd);
await SaveFavoritesAsync(favorites).ConfigureAwait(false);
_loadedFavorites = favorites;
return _loadedFavorites;
}
public async Task<List<Favorite>> RemoveAsync(Favorite toRemove)
{
var favorites = await LoadAsync().ConfigureAwait(false);
if (null == favorites) return null; // that should never happen actually
var found = FindFavorite(favorites, toRemove);
if (null == found) return favorites; // not in the list? nothing to do
favorites.Remove(found);
await SaveFavoritesAsync(favorites).ConfigureAwait(false);
_loadedFavorites = favorites;
return _loadedFavorites;
}
// A very simple search that looks for name only
private Favorite FindFavorite(List<Favorite> favorites, Favorite lookingFor)
{
return favorites
.FirstOrDefault(f => f.LocationName == lookingFor.LocationName);
}
public async Task RemoveFavorite(Favorite toRemove)
{
var favorites = await _favoritesRepository.RemoveAsync(toRemove);
Favorites = new ObservableCollection<Favorite>(favorites);
}
