public async Task <IActionResult> Index()
{
var sessionCart = HttpContext.Session.GetData <ShoppingCart>();
if (!(sessionCart is null))
{
var cartItems = await _shoppingCartService.GetShoppingCartAsync();
if (sessionCart.Items.Count() == cartItems.Count())
{
return(View(sessionCart));
}
}
var cart = await InitializeShoppingCartAsync();
cart = await _campaignService.CalculateAsync(cart);
cart = await _couponService.CalculateAsync(cart);
cart.DeliveryCost = await _deliveryService.CalculateDeliveryCostAsync(cart.Items,
COST_PER_DELIVERY, COST_PER_PRODUCT, FIXED_COST);
//Save shopping cart.
HttpContext.Session.SetData(cart);
return(View(cart));
}