public async Task RemoveItem(int wishlistId, int productId)
{
var spec = new WishlistWithItemsSpecification(wishlistId);
var wishlist = (await _wishlistRepository.GetAsync(spec)).FirstOrDefault();
wishlist.RemoveItem(productId);
await _wishlistRepository.UpdateAsync(wishlist);
}
public async Task <WishlistBook> GetWishlistBookAsync(int id)
{
if (id < 0)
{
throw new Exception("Id cannot be less than 0");
}
return(await _repository.GetAsync(id));
}