/// <summary>
/// Allows for adding change to the existing change in the vending machine.
/// </summary>
/// <param name="change"></param>
public void LoadChange(ChangeHolder change)
{
ChangeHolder.Quarter.quantity += change.Quarter.quantity;
ChangeHolder.Dime.quantity += change.Dime.quantity;
ChangeHolder.Nickel.quantity += change.Nickel.quantity;
ChangeHolder.Penny.quantity += change.Penny.quantity;
}
/// <summary>
/// Check to see if there is enough change before vending item.
/// </summary>
/// <param name="AmountInserted"></param>
/// <param name="ItemPrice"></param>
/// <returns></returns>
public bool EnoughChange(decimal AmountInserted, decimal ItemPrice)
{
ChangeHolder tempChangeHolder = new ChangeHolder();
tempChangeHolder.Quarter.quantity = ChangeHolder.Quarter.quantity;
tempChangeHolder.Dime.quantity = ChangeHolder.Dime.quantity;
tempChangeHolder.Nickel.quantity = ChangeHolder.Nickel.quantity;
tempChangeHolder.Penny.quantity = ChangeHolder.Penny.quantity;
decimal AmountOfChangeToMake = AmountInserted - ItemPrice;
if (AmountOfChangeToMake < 0)
{
throw new Exception("Not enough money inserted to purchase item!");
}
if (AmountOfChangeToMake == 0)
{
return(true);
}
while (AmountOfChangeToMake != 0)
{
if (tempChangeHolder.Quarter.quantity > 0 && AmountOfChangeToMake % tempChangeHolder.Quarter.value == 0)
{
tempChangeHolder.Quarter.quantity--;
AmountOfChangeToMake -= ChangeHolder.Quarter.value;
}
else if (tempChangeHolder.Dime.quantity > 0 && AmountOfChangeToMake % tempChangeHolder.Dime.value == 0)
{
tempChangeHolder.Dime.quantity--;
AmountOfChangeToMake -= ChangeHolder.Dime.value;
}
else if (tempChangeHolder.Nickel.quantity > 0 && AmountOfChangeToMake % tempChangeHolder.Nickel.value == 0)
{
tempChangeHolder.Nickel.quantity--;
AmountOfChangeToMake -= ChangeHolder.Nickel.value;
}
else if (tempChangeHolder.Penny.quantity > 0 && AmountOfChangeToMake % tempChangeHolder.Penny.value == 0)
{
tempChangeHolder.Penny.quantity--;
AmountOfChangeToMake -= ChangeHolder.Penny.value;
}
else
{
return(false);
}
}
return(true);
}
/// <summary>
/// Calculates the amount of change to dispense. If a certain coin has run out, it moves on the next one.
/// </summary>
/// <param name="AmountInserted"></param>
/// <param name="ItemPrice"></param>
/// <returns></returns>
public ChangeHolder MakeChange(decimal AmountInserted, decimal ItemPrice)
{
ChangeHolder CoinsGiven = new ChangeHolder();
decimal AmountOfChangeToMake = AmountInserted - ItemPrice;
if (AmountOfChangeToMake < 0)
{
throw new Exception("Not enough money inserted to purchase item!");
}
if (AmountOfChangeToMake == 0)
{
return(CoinsGiven);
}
while (AmountOfChangeToMake != 0)
{
if (ChangeHolder.Quarter.quantity > 0 && AmountOfChangeToMake % ChangeHolder.Quarter.value == 0)
{
CoinsGiven.Quarter.quantity++;
AmountOfChangeToMake -= ChangeHolder.Quarter.value;
ChangeHolder.Quarter.quantity--;
}
else if (ChangeHolder.Dime.quantity > 0 && AmountOfChangeToMake % ChangeHolder.Dime.value == 0)
{
CoinsGiven.Dime.quantity++;
AmountOfChangeToMake -= ChangeHolder.Dime.value;
ChangeHolder.Dime.quantity--;
}
else if (ChangeHolder.Nickel.quantity > 0 && AmountOfChangeToMake % ChangeHolder.Nickel.value == 0)
{
CoinsGiven.Nickel.quantity++;
AmountOfChangeToMake -= ChangeHolder.Nickel.value;
ChangeHolder.Nickel.quantity--;
}
else if (ChangeHolder.Penny.quantity > 0 && AmountOfChangeToMake % ChangeHolder.Penny.value == 0)
{
CoinsGiven.Penny.quantity++;
AmountOfChangeToMake -= ChangeHolder.Penny.value;
ChangeHolder.Penny.quantity--;
}
else
{
throw new Exception("Unable to make enough change!");
}
}
return(CoinsGiven);
}
public ChangeMaker()
{
ChangeHolder = new ChangeHolder();
}
/// <summary>
/// Loads Change to machine. Assumes that only one of each item is in the list.
/// </summary>
/// <param name="change"></param>
public static void loadChange(ChangeHolder change)
{
changeMaker.LoadChange(change);
adminPanelSelection();
}
public static void adminPanelSelection()
{
Console.WriteLine("What would you like to do?");
Console.WriteLine("To load change, press 1.");
Console.WriteLine("To empty change, press 2.");
Console.WriteLine("To load a specific item, press 3");
Console.WriteLine("To load a list of items, press 4");
Console.WriteLine("To place the machine in vend mode, press 5");
int selection = 0;
Int32.TryParse(Console.ReadLine(), out selection);
if (selection < 1 || selection > 5)
{
Console.WriteLine("Invalid Selection. Please try again.");
adminPanelSelection(); //Could throw a stack overflow execption here if user selects wrong item too many times
}
//all values being passed are being coded here instead of asking for input to simplify both coding and testing
switch (selection)
{
case 1:
ChangeHolder change = new ChangeHolder();
change.Quarter.quantity = 25;
change.Dime.quantity = 30;
change.Nickel.quantity = 40;
change.Penny.quantity = 100;
loadChange(change);
break;
case 2:
emptyChange();
break;
case 3:
loadItem(new Item()
{
Name = "Pepsi", quantity = 10, Price = .89M
});
break;
case 4:
Items items = new Items();
items.items.Add(new Item()
{
Name = "CocaCola", Price = .87M, quantity = 12
});
items.items.Add(new Item()
{
Name = "Diet Pepsi", Price = .96M, quantity = 1
});
items.items.Add(new Item()
{
Name = "Diet Coke", Price = .96M, quantity = 3
});
loadItems(items);
break;
case 5:
VendMode();
break;
}
}
/// <summary>
/// Change must be inserted before being able to select an item. Machine will check if there is enough change to make the purchase.
/// </summary>
public static void VendMode()
{
Items availableItems = new Items();
availableItems = itemSelector.AvailableItems();
Console.WriteLine("Please insert change. Q for quarter, D for dime, N for nickel, P for penny. Press enter when done");
string changeInput = Console.ReadLine();
List <Change> change = new List <Change>();
ChangeHolder changeHolder = new ChangeHolder();
decimal inserted = 0M;
foreach (var character in changeInput)
{
switch (character)
{
case 'Q':
changeHolder.Quarter.quantity++;
inserted += changeHolder.Quarter.value;
break;
case 'D':
changeHolder.Dime.quantity++;
inserted += changeHolder.Dime.value;
break;
case 'N':
changeHolder.Nickel.quantity++;
inserted += changeHolder.Nickel.value;
break;
case 'P':
changeHolder.Penny.quantity++;
inserted += changeHolder.Penny.value;
break;
default:
break;
}
}
int index = 0;
foreach (Item item in availableItems.items)
{
if (item.quantity > 0)
{
Console.WriteLine(index + " - " + item.Name + " - " + item.Price);
}
index++;
}
Console.WriteLine("X to shutdown or A to enter admin panel.");
int selectedIndex = -1;
while (selectedIndex == -1)
{
string input = Console.ReadLine();
if (input == "X")
{
return;
}
if (input == "A")
{
adminPanelSelection();
}
else
{
Int32.TryParse(input, out selectedIndex);
if (selectedIndex == -1)
{
Console.WriteLine("invalid selection, please try again");
}
}
}
Item selectedItem = new Item();
selectedItem = availableItems.items[selectedIndex];
try
{
if (changeMaker.EnoughChange(inserted, selectedItem.Price))
{
itemSelector.VendItem(selectedItem);
ChangeHolder changeGiven = new ChangeHolder();
changeGiven = changeMaker.MakeChange(inserted, selectedItem.Price);
Console.WriteLine("Change given");
Console.WriteLine("Quarters: " + changeGiven.Quarter.quantity.ToString());
Console.WriteLine("Dimes: " + changeGiven.Dime.quantity.ToString());
Console.WriteLine("Nickels: " + changeGiven.Nickel.quantity.ToString());
Console.WriteLine("Pennies: " + changeGiven.Penny.quantity.ToString());
changeMaker.LoadChange(changeHolder); //load the coins inserted into the change maker
Console.WriteLine("Item vended");
}
else
{
Console.WriteLine("Not enough change. Returning inserted change.");
changeHolder = new ChangeHolder();
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
VendMode();
}
