internal override IObservable <object> BuildObservable(Params param) => Observable.Create <object>(async o =>
{
try
{
var favorites = await FavoritesRepository.GetAllAsync();
var existedItem = favorites.Where(x => x.EntityId == param.Id).FirstOrDefault();
if (param.IsFavorite)
{
if (existedItem == null)
{
await FavoritesRepository.AddAsync(new FavoriteItem()
{
EntityId = param.Id,
Tag = null
});
}
}
else
{
if (existedItem != null)
{
await FavoritesRepository.DeleteByIdAsync(existedItem.Id);
}
}
o.OnNext(null);
}
catch (Exception e)
{
Log.Error(GetType().Name, e.Message);
o.OnError(e);
}
finally { o.OnCompleted(); }
});