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 bool AreCustomerFundsEnoughToPurchaseThisItem(int itemNumber, VendingMachines vm)
{
bool result = false;
if (vm.CoinBox.CustomerCoinsValue >= vm.Inventory.ItemCostArray[itemNumber - 1])
{
result = true;
}
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);
}
}
public Menus()
{
Vm = new VendingMachines();
}
private void ComputeChangeAndMoveCustomersCoins(int itemNumber, VendingMachines vm)
{
int[] TargetChangeVector = new[] { 0, 0, 0 }
; int TargetChangeVectorValue = 0;
int TotalTargetChangeVectorValue = 0;
if (vm.CoinBox.CustomerCoinsValue == vm.Inventory.ItemCostArray[itemNumber - 1])
{
vm.CoinBox.MoveCustomersCoinsToCoinBox(vm.CoinBox.CustomerCoins.CoinVector);
return;
}
else if (vm.CoinBox.CustomerCoinsValue >= vm.Inventory.ItemCostArray[itemNumber - 1])
{
TargetChangeVectorValue = vm.CoinBox.CustomerCoinsValue - vm.Inventory.ItemCostArray[itemNumber - 1];
TotalTargetChangeVectorValue = TargetChangeVectorValue;
// Make change from all the coins in the CoinBox
vm.CoinBox.MoveCustomersCoinsToCoinBox(vm.CoinBox.CustomerCoins.CoinVector);
do
{
if (vm.CoinBox.CoinBoxCoins.CoinVector[2] > 0)
{
if (TargetChangeVectorValue >= Coins.COIN_3_VALUE)
{
vm.CoinBox.MoveCoinBoxCoinsToChangeBox(new int[] { 0, 0, 1 });
TargetChangeVectorValue -= Coins.COIN_3_VALUE;
}
else
{
break;
}
}
else
{
break;
}
} while (vm.CoinBox.ChangeBoxCoinsValue < TargetChangeVectorValue);
do
{
if (vm.CoinBox.CoinBoxCoins.CoinVector[1] > 0)
{
if (TargetChangeVectorValue >= Coins.COIN_2_VALUE)
{
vm.CoinBox.MoveCoinBoxCoinsToChangeBox(new int[] { 0, 1, 0 });
TargetChangeVectorValue -= Coins.COIN_2_VALUE;
}
else
{
break;
}
}
else
{
break;
}
} while (vm.CoinBox.ChangeBoxCoinsValue < TargetChangeVectorValue);
do
{
if (vm.CoinBox.CoinBoxCoins.CoinVector[0] > 0)
{
if (TargetChangeVectorValue >= Coins.COIN_1_VALUE)
{
vm.CoinBox.MoveCoinBoxCoinsToChangeBox(new int[] { 1, 0, 0 });
TargetChangeVectorValue -= Coins.COIN_1_VALUE;
}
else
{
break;
}
}
else
{
break;
}
} while (vm.CoinBox.ChangeBoxCoinsValue < TargetChangeVectorValue);
if (vm.CoinBox.ChangeBoxCoinsValue < TotalTargetChangeVectorValue)
{
Console.WriteLine();
Console.WriteLine("***** Sorry, CoinBox does not have the coins to make correct change. *****");
Console.WriteLine("***** We owe you [{0}] cents. *****", TargetChangeVectorValue);
}
return;
}
}
