public Dictionary <int, List <BuyingSet> > GetBuyingQuantityCombinations()
{
if (buyingQuantityCombinations == null)
{
buyingQuantityCombinations = new Dictionary <int, List <BuyingSet> >();
for (var i = 1; i <= promotedBooks.Length; i++)
{
var buyingSets = new List <BuyingSet>();
var availableSet = promotedBooks.CombinationsNotRepeat(i);
foreach (var set in availableSet)
{
var newBuyingSet = new BuyingSet();
foreach (var item in set)
{
var newBuyingItem = new BuyingItem
{
BookId = item,
Quantity = 1
};
newBuyingSet.Items.Add(newBuyingItem);
}
buyingSets.Add(newBuyingSet);
}
buyingQuantityCombinations.Add(i, buyingSets);
}
}
return(buyingQuantityCombinations);
}
private void Action(BuyingSet buyingSet, bool negative)
{
foreach (var buyingItem in buyingSet.Items)
{
var item = Items.First(x => x.BookId == buyingItem.BookId);
item.Quantity += (negative ? -1 : 1) * buyingItem.Quantity;
}
}
public void GetOut(BuyingSet buyingSet)
{
Action(buyingSet, true);
}
public void PutIn(BuyingSet buyingSet)
{
Action(buyingSet, false);
}