public IActionResult Checkout(Order order)
{
var wholesaler = context.Wholesalers.FirstOrDefault(p => p.Warehouse.Product.Id == order.ProductId);
order.WholesalerId = wholesaler.WholesalerId;
var product = productRepository.Products.FirstOrDefault(p => p.Id == order.ProductId);
order.TotalPrice = order.Quantity * product.Price;
warehouseRepository.DecreaseAvailableProducts(wholesaler.WholesalerId, product.Id, order.Quantity);
repository.SaveOrder(order);
return(RedirectToAction("List"));
}