public async Task <IFavoriteItem> CreateFavorite(string title, Guid fileKey, string command, Guid key = default)
{
var item = new FavoriteItem(key == default(Guid) ? Guid.NewGuid() : key, title, fileKey, command);
if ((await GetItem(item.Key)) != null)
{
throw new InvalidOperationException($"Favorite key {item.Key} already exists");
}
return(await ProcessChanges(item, (itm, items) => items.AddItem(itm)));
}
private async Task <FavoriteItem> ProcessChanges(FavoriteItem item, Func <FavoriteItem, List <FavoriteItem>, IEnumerable <FavoriteItem> > action)
{
await GetFavorites();
Items = action(item, Items).ToList();
var serializedFavorites = new FavoriteSerializer().Serialize(Items);
await LocalStorageRepository.SetItem(LocalStorageFavoritesName, serializedFavorites);
FavoritesChanged?.Invoke(this, EventArgs.Empty);
return(item);
}
public async Task <IFavoriteItem> EditFavorite(string title, Guid fileKey, string command, Guid key)
{
var item = (await GetItem(key)) as FavoriteItem;
if (item == null)
{
throw new InvalidOperationException($"Favorite item {key} not found.");
}
var newItem = new FavoriteItem(key, title, fileKey, command);
return(await ProcessChanges(item, (itm, items) => items.Where(f => f.Key != itm.Key).AddItem(newItem)));
}