public VendingMachines.PurchaseResults PurchaseThisItem(int itemNumber, VendingMachines vm)
{
VendingMachines.PurchaseResults result = VendingMachines.PurchaseResults.PurchaseInProgress;
Console.WriteLine();
Console.WriteLine("***** Item [{0}] Selected for Purchase. *****", itemNumber);
CurrentSelectedItem = itemNumber;
if (this.IsItemOutOfStock(itemNumber))
{
Console.WriteLine();
Console.WriteLine("***** Sorry, item: [{0}] is Out-Of-Stock. *****", itemNumber);
return(VendingMachines.PurchaseResults.NotCompletedItemOutOfStock);
}
if (!this.AreCustomerFundsEnoughToPurchaseThisItem(itemNumber, vm))
{
Console.WriteLine();
Console.WriteLine("***** Sorry, not enough money to purchase item: [{0}]. *****", itemNumber);
return(VendingMachines.PurchaseResults.NotCompletedNotEnoughMoney);
}
result = this.CompetePurchase(itemNumber, vm);
return(result);
}
private VendingMachines.PurchaseResults CompetePurchase(int itemNumber, VendingMachines vm)
{
VendingMachines.PurchaseResults result = VendingMachines.PurchaseResults.PurchaseInProgress;
this.DispenseThisItem(itemNumber);
// Compute Change and Move Customer's Coins to CoinBox and ChangeBox
this.ComputeChangeAndMoveCustomersCoins(itemNumber, vm);
result = VendingMachines.PurchaseResults.PurchaseCompleted;
return(result);
}
private void PurchaseThisItem(int itemNumber, VendingMachines vm)
{
Vm.StateMachine.TransitionStateMachine(StateMachines.VMActions.SelectingItemForPurchase);
VendingMachines.PurchaseResults purchaseResult = Vm.Inventory.PurchaseThisItem(itemNumber, vm);
if (purchaseResult == VendingMachines.PurchaseResults.PurchaseCompleted)
{
Vm.StateMachine.TransitionStateMachine(StateMachines.VMActions.PurchaseCompleted);
}
else if (purchaseResult == VendingMachines.PurchaseResults.NotCompletedNotEnoughMoney)
{
Vm.StateMachine.TransitionStateMachine(StateMachines.VMActions.PurchaseNotCompleted);
}
else if (purchaseResult == VendingMachines.PurchaseResults.PurchaseNotCompleted)
{
Vm.StateMachine.TransitionStateMachine(StateMachines.VMActions.PurchaseNotCompleted);
}
}