public GoodsBuyedEvent BuyGoods(IReadOnlyCollection<Coin> depositedAmount, GoodsIdentity goods)
{
Contract.Requires(depositedAmount != null);
var availableGoods = _availableGoods.Retrieve(goods);
var depositWallet = new Wallet(depositedAmount);
var depositTotal = depositWallet.TotalFunds();
if (depositTotal < availableGoods.Price)
{
throw new InsufficientAmountForBuyingGoodsException(availableGoods.Price, depositTotal, goods);
}
var refundAmount = depositTotal - availableGoods.Price;
_vendingMachineWallet = _vendingMachineWallet.Put(depositedAmount);
_buyerWallet = _buyerWallet.Retrieve(depositedAmount);
var refundCoins = Refund(refundAmount);
var refundWallet = new Wallet(refundCoins);
if (refundWallet.TotalFunds() != refundAmount)
{
throw new VendingMachineDoesNotHaveCoinsForRefundException(_vendingMachineWallet, refundAmount);
}
_vendingMachineWallet = _vendingMachineWallet.Retrieve(refundCoins);
_buyerWallet = _buyerWallet.Put(refundCoins);
return new GoodsBuyedEvent(_vendingMachineWallet, _buyerWallet, availableGoods, refundCoins);
}
public BuyCommand(IReadOnlyCollection<Coin> deposit, GoodsIdentity goods)
{
Contract.Requires(deposit != null);
Contract.Requires(!goods.Equals(default(GoodsIdentity)));
Deposit = deposit;
Goods = goods;
}
public BuyCommand(IReadOnlyCollection <Coin> deposit, GoodsIdentity goods)
{
Contract.Requires(deposit != null);
Contract.Requires(!goods.Equals(default(GoodsIdentity)));
Deposit = deposit;
Goods = goods;
}
public InsufficientAmountForBuyingGoodsException(decimal expectedFunds, decimal actualFunds, GoodsIdentity goods)
: base(string.Format("Insufficient amount for buying goods {0}. Expected funds: {1}, actual funds: {2}", goods, expectedFunds, actualFunds))
{
Contract.Requires(expectedFunds > actualFunds);
ExpectedFunds = expectedFunds;
ActualFunds = actualFunds;
Goods = goods;
}
public InsufficientAmountForBuyingGoodsException(decimal expectedFunds, decimal actualFunds, GoodsIdentity goods)
: base(string.Format("Insufficient amount for buying goods {0}. Expected funds: {1}, actual funds: {2}", goods, expectedFunds, actualFunds))
{
Contract.Requires(expectedFunds > actualFunds);
ExpectedFunds = expectedFunds;
ActualFunds = actualFunds;
Goods = goods;
}
public JsonResult Buy(IEnumerable<CoinViewModel> deposit, Guid goodsIdentity)
{
Contract.Requires(deposit != null);
Contract.Requires(goodsIdentity != default(Guid));
var depositCoins = deposit
.Select(x => new Coin(x.ParValue, x.Count))
.ToArray();
var goods = new GoodsIdentity(goodsIdentity);
Contract.Assume(!goods.Equals(default(GoodsIdentity)));
var command = new BuyCommand(depositCoins, goods);
var @event = _buyCommandHandler.Execute(command);
return Json(@event);
}
public JsonResult Buy(IEnumerable <CoinViewModel> deposit, Guid goodsIdentity)
{
Contract.Requires(deposit != null);
Contract.Requires(goodsIdentity != default(Guid));
var depositCoins = deposit
.Select(x => new Coin(x.ParValue, x.Count))
.ToArray();
var goods = new GoodsIdentity(goodsIdentity);
Contract.Assume(!goods.Equals(default(GoodsIdentity)));
var command = new BuyCommand(depositCoins, goods);
var @event = _buyCommandHandler.Execute(command);
return(Json(@event));
}
