/// <summary>
/// If the selection is valid, in stock, and costs less than the current balance,
/// reduce the inventory count by 1 and reduce the balance by the cost.
/// </summary>
/// <param name="slot">The item code, or "slot" in the vending machine.</param>
/// <returns></returns>
public VendableItems Purchase(string slot)
{
VendableItems item = null;
if (!Inventory.ContainsKey(slot))
{
throw new InvalidSlotException();
}
if (Inventory[slot].AmountRemaining == 0)
{
throw new OutOfStockException();
}
if (Balance < Inventory[slot].Cost)
{
throw new InsufficientFundsException();
}
item = Inventory[slot];
item.SellOne();
Balance -= item.Cost;
Log.RecordPurchase(slot, item.Name, Balance + item.Cost, Balance);
return item;
}
/// <summary>
/// Displays vending machine inventory as a list. Items with no remaining
/// stock are displayed as "SOLD OUT!"
/// </summary>
private void DisplayVendingItemsList()
{
Console.Clear();
string[] slots = VendoMatic500.Slots;
foreach (string slot in slots)
{
VendableItems item = VendoMatic500.GetItemAtSlot(slot);
if (item.AmountRemaining > 0)
{
Console.WriteLine($"{slot,-4} {item.Name,-19} ${item.Cost}");
}
else
{
Console.ForegroundColor = ConsoleColor.DarkGray;
Console.WriteLine($"{slot,-4} {item.Name,-19} SOLD OUT!");
Console.ForegroundColor = ConsoleColor.White;
}
}
Console.WriteLine();
}
/// <summary>
/// Purchases the selected product, if valid.
/// </summary>
/// <param name="selection">The user input product code / "slot".</param>
private void ProcessPurchaseOfSelectedProduct(string selection)
{
try
{
VendableItems item = VendoMatic500.Purchase(selection);
if (item != null)
{
ResponsiveYumText += item.ConsumeMessage + "\n";
Console.WriteLine();
Console.WriteLine($"Dispensing {item.Name}...");
Console.WriteLine();
PauseOperation();
}
}
catch (VendingMachineException e)
{
Console.WriteLine(e.Message);
Console.WriteLine();
Console.WriteLine("Press ENTER to continue");
Console.ReadLine();
}
}
/// <summary>
/// Displays vending machine inventory as a list. Items with no remaining
/// stock are displayed as "SOLD OUT!"
/// </summary>
private void DisplayVendingItemsGrid()
{
Console.Clear();
string[] slots = VendoMatic500.Slots;
Console.WriteLine("----------------------------------------------------------------------------------------");
foreach (char c in "ABCD".ToCharArray())
{
for (int s = 1; s < 5; s++)
{
string address = c.ToString() + s.ToString();
VendableItems item = VendoMatic500.GetItemAtSlot(address);
if (item.AmountRemaining > 0)
{
Console.Write($"| {address,-17}|");
}
else
{
Console.Write("|");
Console.ForegroundColor = ConsoleColor.DarkGray;
Console.Write($" {address,-17}");
Console.ForegroundColor = ConsoleColor.White;
Console.Write("|");
}
}
Console.WriteLine();
for (int s = 1; s < 5; s++)
{
string address = c.ToString() + s.ToString();
VendableItems item = VendoMatic500.GetItemAtSlot(address);
if (item.AmountRemaining > 0)
{
Console.Write($"| {item.Name,-19}|");
}
else
{
Console.Write("|");
Console.ForegroundColor = ConsoleColor.DarkGray;
Console.Write($" {item.Name,-19}");
Console.ForegroundColor = ConsoleColor.White;
Console.Write("|");
}
}
Console.WriteLine();
for (int s = 1; s < 5; s++)
{
string address = c.ToString() + s.ToString();
VendableItems item = VendoMatic500.GetItemAtSlot(address);
if (item.AmountRemaining > 0)
{
Console.Write($"| {item.Cost.ToString("C"),-18}|");
}
else
{
Console.Write("|");
Console.ForegroundColor = ConsoleColor.DarkGray;
Console.Write($" SOLD OUT! ");
Console.ForegroundColor = ConsoleColor.White;
Console.Write("|");
}
}
Console.WriteLine();
Console.WriteLine("----------------------------------------------------------------------------------------");
}
Console.WriteLine();
}