/// <summary>
/// продажа товара
/// </summary>
/// <param name="sellItem"></param>
/// <param name="customer"></param>
/// <returns></returns>
public virtual bool SellTheItem(GoodsItem sellItem, Customer customer)
{
if (ChechGoodsIsEnough(sellItem))
{
if (CheckIfEnoughMoney(sellItem, DBalance))
{
if (DoesHaveEnoughChange(sellItem, DBalance))
{
return(_SellTheItem(sellItem, customer));
}
else
{
CancelOrder(customer);
DoesNotHaveEnoughChange();
return(false);
}
}
else
{
//CancelOrder(customer);
DoesNotHaveEnoughMoney();
return(false);
}
}
else
{
CancelOrder(customer);
DoesNotHaveEnoughGoods();
return(false);
}
}
/// <summary>
/// Рассчитываем сдачу
/// </summary>
/// <param name="sellItem"></param>
/// <param name="DBalance"></param>
/// <returns></returns>
private List <Coin> CountChange(GoodsItem sellItem, decimal DBalance)
{
decimal changeAmount = GetChangeAmount(sellItem, DBalance);
Coin _coin = null;
List <Coin> _coins = new List <Coin> {
};
while (changeAmount > 0)
{
Func <Coin, bool> changeCondition = a => a.Value <= changeAmount && (changeAmount - a.Value) >= 0 &&
!_coins.Contains(a);
_coin = Wallet.GetMaxCoinUnderCondition(a => changeCondition(a));
if (_coin != null)
{
changeAmount -= _coin.Value;
_coins.Add(_coin);
}
else
{
break;
}
}
if (changeAmount == 0)
{
return(_coins);
}
return(null);
}
/// <summary>
/// Выдаем товар
/// </summary>
/// <param name="goodItem"></param>
/// <param name="customer"></param>
public virtual void TakeTheGood(GoodsItem goodItem, Customer customer)
{
if (customer.GetTheGood(goodItem))
{
GoodsStorage.RemoveItems(a => a.Equals(goodItem));
DBalance = 0;
}
}
/// <summary>
/// Проверяем наличие товара
/// </summary>
/// <param name="sellItem"></param>
/// <returns></returns>
private bool ChechGoodsIsEnough(GoodsItem sellItem)
{
if (GoodsStorage.GetItem(a => a.Equals(sellItem)) != null)
{
return(true);
}
return(false);
}
private decimal GetChangeAmount(GoodsItem sellItem, decimal DBalance)
{
if (sellItem != null)
{
return(DBalance - sellItem.Value);
}
else
{
return(DBalance);
}
}
/// <summary>
/// проверяем хватает ли денег
/// </summary>
/// <param name="sellItem"></param>
/// <param name="DBalance"></param>
/// <returns></returns>
private bool CheckIfEnoughMoney(GoodsItem sellItem, decimal DBalance)
{
decimal moneyAmount = DBalance;
if (moneyAmount >= sellItem.Value)
{
return(true);
}
else
{
//NewMessage("Sorry money amount is not enough");
return(false);
}
}
private Transaction TransactionPerform(TradeParticipant participant1,
TradeParticipant participant2,
List <Coin> money,
GoodsItem sellItem, TransactionType Ttype)
{
var transaction = Transaction.Create(this, participant2, money, sellItem, Ttype);
if (transaction != null)
{
transaction.Perform();
return(transaction);
}
return(null);
}
public static Transaction Create(TradeParticipant participant1,
TradeParticipant participant2,
List <Coin> money,
GoodsItem sellItem, TransactionType Ttype)
{
Transaction transaction = new Transaction(
participant1,
participant2,
money,
sellItem,
Ttype);
return(transaction);
}
/// <summary>
/// Проверяем хватает ли сдачи
/// </summary>
/// <param name="sellItem"></param>
/// <param name="DBalance"></param>
/// <returns></returns>
private bool DoesHaveEnoughChange(GoodsItem sellItem, decimal DBalance)
{
decimal changeAmount = GetChangeAmount(sellItem, DBalance);
if (changeAmount == 0)
{
return(true);
}
if (CountChange(sellItem, DBalance) != null)
{
return(true);
}
return(false);
}
private Transaction(TradeParticipant participant1,
TradeParticipant participant2,
List <Coin> money,
GoodsItem sellItem, TransactionType Ttype)
{
if (Ttype == TransactionType.Sell)
{
this.participant1 = participant1;
this.participant2 = participant2;
}
else
{
this.participant1 = participant2;
this.participant2 = participant1;
}
this.money = money;
this.sellItem = sellItem;
this.Ttype = Ttype;
}
/// <summary>
/// продаем товар
/// </summary>
/// <param name="sellItem"></param>
/// <param name="customer"></param>
/// <returns></returns>
private bool _SellTheItem(GoodsItem sellItem, Customer customer)
{
List <Coin> change;
if (customer.GetTheGood(sellItem))
{
GoodsStorage.RemoveItems(a => a == sellItem);
change = CountChange(sellItem, DBalance);
}
else
{
change = CountChange(null, DBalance);
}
if (customer.GetCoins(change))
{
Wallet.RemoveItems(a => change.Contains(a));
DBalance = 0;
NewMessage("Thank you!");
return(true);
}
return(false);
}
////buy from participant2 what _goodsItem, for money
public Transaction Buy(TradeParticipant participant2, GoodsItem buyItem, List <Coin> money)
{
return(TransactionPerform(this, participant2, money, buyItem, TransactionType.Buy));
}
//sell to participant2 what sellItem, for money
public Transaction Sell(TradeParticipant participant2, GoodsItem sellItem, List <Coin> money)
{
return(TransactionPerform(this, participant2, money, sellItem, TransactionType.Sell));
}