/// <summary>
/// Initializes a new instance of the <see cref="OfferDraftItem"/> class.
/// </summary>
/// <param name="product"><see cref="Product"/> on offer.</param>
/// <param name="quantity">Quantity of products on offer.</param>
public OfferDraftItem(Product product, int quantity)
{
if (product == null)
throw new ArgumentNullException("product");
if (quantity < 1)
throw new ArgumentOutOfRangeException("quantity", quantity, "Quantity should be positive.");
_product = product;
_quantity = quantity;
}
/// <summary>
/// Initializes a new instance of the <see cref="OfferItem"/> class for the specified product.
/// </summary>
/// <param name="draftItem"><see cref="OfferDraftItem"/> from which the offer item is created.</param>
public OfferItem(OfferDraftItem draftItem)
{
if (draftItem == null)
throw new ArgumentNullException("draftItem");
_product = draftItem.Product;
_quantity = draftItem.Quantity;
_discount = draftItem.Discount;
_productPrice = _product.Price;
_discountAmount = draftItem.DiscountAmount;
_itemTotal = draftItem.ItemTotal;
_itemSubtotal = draftItem.ItemSubtotal;
}