public ApiListingModel(Listing listing)
{
ListingName = listing.ListingName;
ListingPrice = listing.ListingPrice;
ListingID = listing.ListingID;
Quantity = listing.Quantity;
DailyDeal = listing.HasDailyDeal();
WeeklyDeal = listing.HasWeeklyDeal();
OtherDeal = listing.HasOtherDeal();
SalePercent = listing.GetSalePercent();
SalePrice = listing.SaleOrDefaultPrice();
EarliestExpiry = listing.GetEarliestExpiry(false, false);
}