public async Task GetActiveCartDetails()

in src/Modules/SimplCommerce.Module.ShoppingCart/Services/CartService.cs [113:170]
54 lines of code
6 McCabe index (conditional complexity)

        public async Task<CartVm> GetActiveCartDetails(long customerId, long createdById)
        {
            var cart = await GetActiveCart(customerId, createdById);
            if (cart == null)
            {
                return null;
            }

            var cartVm = new CartVm(_currencyService)
            {
                Id = cart.Id,
                CouponCode = cart.CouponCode,
                IsProductPriceIncludeTax = cart.IsProductPriceIncludeTax,
                TaxAmount = cart.TaxAmount,
                ShippingAmount = cart.ShippingAmount,
                OrderNote = cart.OrderNote,
                LockedOnCheckout = cart.LockedOnCheckout
            };

            cartVm.Items = _cartItemRepository
                .Query()
                .Include(x => x.Product).ThenInclude(p => p.ThumbnailImage)
                .Include(x => x.Product).ThenInclude(p => p.OptionCombinations).ThenInclude(o => o.Option)
                .Where(x => x.CartId == cart.Id).ToList()
                .Select(x => new CartItemVm(_currencyService)
                {
                    Id = x.Id,
                    ProductId = x.ProductId,
                    ProductName = x.Product.Name,
                    ProductPrice = x.Product.Price,
                    ProductStockQuantity = x.Product.StockQuantity,
                    ProductStockTrackingIsEnabled = x.Product.StockTrackingIsEnabled,
                    IsProductAvailabeToOrder = x.Product.IsAllowToOrder && x.Product.IsPublished && !x.Product.IsDeleted,
                    ProductImage = _mediaService.GetThumbnailUrl(x.Product.ThumbnailImage),
                    Quantity = x.Quantity,
                    VariationOptions = CartItemVm.GetVariationOption(x.Product)
                }).ToList();

            cartVm.SubTotal = cartVm.Items.Sum(x => x.Quantity * x.ProductPrice);
            if (!string.IsNullOrWhiteSpace(cartVm.CouponCode))
            {
                var cartInfoForCoupon = new CartInfoForCoupon
                {
                    Items = cartVm.Items.Select(x => new CartItemForCoupon { ProductId = x.ProductId, Quantity = x.Quantity }).ToList()
                };
                var couponValidationResult = await _couponService.Validate(customerId, cartVm.CouponCode, cartInfoForCoupon);
                if (couponValidationResult.Succeeded)
                {
                    cartVm.Discount = couponValidationResult.DiscountAmount;
                }
                else
                {
                    cartVm.CouponValidationErrorMessage = couponValidationResult.ErrorMessage;
                }
            }

            return cartVm;
        }