public async Task AddBasketItem(int productId)
{
var usersId = _currentUserProvider.GetId();
var basket = await _queries.GetUsersBasket(usersId, d => { });
if (basket == null)
{
basket = new Basket {
UserId = usersId
};
_unitOfWork.Add(basket);
}
var basketItem = new BasketItem {
ProductId = productId, BasketId = basket.Id
};
_unitOfWork.Add(basketItem);
_basketCache.Invalidate(basket.Id);
await _unitOfWork.PersistChanges();
}