public virtual async Task <decimal> GetTotalSumAsync(int sessionId)
{
var existingBasket = await _basketRepository.GetBasketBySessionIdAsync(sessionId);
await _cartPriceRuleService.ApplyPriceRulesAsync(existingBasket);
var totalSum = existingBasket.BasketItems.Sum(basketItem => basketItem.Product.Price * basketItem.Quantity);
var discountSum = existingBasket.Discounts.Sum(discount => discount.Price);
existingBasket.TotalSum = totalSum - discountSum;
_basketLogger.LogBasket(existingBasket);
return(existingBasket.TotalSum);
}
