public void Display()
{
Console.Clear();
//Display menu options
Console.WriteLine(@"
_______ ______ ___ __ __
/__ __// / ____// | || / //________________________/ //__(_))___________________
/ // / __// | || / // / _\\ / ___ \\ / __ // / // / ___ \\ / ___ `//
/ // / //___ | ||/ // / __// / // / // / //_/ // / // / // / // / //_/ //
/_// /_____// |____// \___// /_// /_// \___,_// /_// /_// /_// \__, //
/_____//
*************************************************
** Please choose from the following options: **
** 1. Display Vending Machine Items **
** 2. Purchase Menu **
** 3. Exit **
** **
*************************************************");
//Get user input
int selection;
Console.WriteLine();
Console.Write("Please enter your selection: ");
bool isValid = int.TryParse(Console.ReadLine(), out selection);
//Validate the user input
while (!isValid || selection < 1 || selection > 4)
{
Console.WriteLine("You did not enter a valid choice please enter the number corresponding to your selection");
isValid = int.TryParse(Console.ReadLine(), out selection);
}
// Choose which methods to call based on user selection
if (selection == 1)
{
// Clear the console and display Menu Items
Console.Clear();
DisplayItems.Display(vm);
Console.WriteLine();
Console.WriteLine("Press Enter to return to main menu");
Console.ReadLine();
Display();
}
else if (selection == 2)
{
// Display Purchase Menu by creating a new purchase menu object and passing the vending machine reference to its contructor
PurchaseMenu pm = new PurchaseMenu(vm);
pm.Display();
}
else if (selection == 3)
{
// Exit Program
return;
}
else if (selection == 4)
{
// Generate a sales report and print it to file.
vm.PrintSalesReport();
//Inform the user that a report was generated and return to main menu
Console.WriteLine();
Console.WriteLine("Sales report generated, check the SalesReport folder to view the report.");
Console.WriteLine("Press enter to continue...");
Console.ReadLine();
Display();
}
}
//Method to display a submenu that allows the user to purchase an item by slot ID
private void PurchaseItemSubMenu()
{
//Clear the console before displaying the purchase submenu
Console.Clear();
//Display all items in the vending machine
DisplayItems.Display(vm);
//Ask the user to enter a slot number corresponding to the item they want to purchase
Console.WriteLine();
Console.Write("Please enter an item to purchase by slot (A1, B3, etc): ");
string input = Console.ReadLine().ToUpper(); //Add a ToUpper method to user input for case insensitivity
//Pass user input to purchase item method which will determine if it is a valid purchase
Item purchasedItem = null;
try
{
purchasedItem = vm.PurchaseItem(input);
}
catch (PurchaseItemExceptionInvalidSlot)
{
Console.WriteLine();
Console.WriteLine("The slot entered does not exist, returning to the purchase menu");
}
catch (PurchaseItemExceptionItemSoldOut)
{
Console.WriteLine();
Console.WriteLine("Sorry but the item you selected is sold out, returning to the purchase menu");
}
catch (PurchaseItemExceptionInsufficientFunds)
{
Console.WriteLine();
Console.WriteLine("Sorry you do not have enough funds to purchase that item, returning to the purchase menu");
}
catch (ItemStuckException)
{
Console.WriteLine();
Console.WriteLine($"The {purchasedItem.Name} you have purchased appears to be stuck, what would you like to do?");
Console.WriteLine(@" 1. Return to Purchase Menu.
2. Kick the Machine.");
string input1 = Console.ReadLine();
int response = int.Parse(input1);
if (response < 1 || response > 2)
{
Console.WriteLine("You have made an incorrect selection. Please try again.");
return;
}
else
{
IsStuck(response);
}
}
//If purchase is succesful display item info
if (purchasedItem != null)
{
Console.WriteLine($@"
You succesfully purchased {purchasedItem.Name}!
{vm.saleMessage[purchasedItem.Type]}
{purchasedItem.Price:c} has been deducted from your balance!");
}
//After returning from purchase item wait for the user to press enter before going back to main purchase menu
Console.WriteLine();
Console.WriteLine("Press Enter to continue..");
Console.ReadLine();
}