/// <summary>
/// Adds a variant to the cart.
/// </summary>
/// <param name="id">The Id of the variant.</param>
/// <returns></returns>
public CartLineItemViewModel Post(string id)
{
using (_unitOfWork.BeginTransaction())
{
var variant = _variantRepository.Single(v => v.Id == id);
_currentCart.Cart.AddVariant(variant);
var updatedCartLineItem = _currentCart.Cart.CartLineItems.Single(line => line.VariantId == id);
return(_cartViewModelFactory.Create(updatedCartLineItem));
}
}