/// <summary>
/// Thid method manage the process to verify selection after inserted valid money
/// </summary>
private void GetSelection()
{
// Ask the user to make selection and show how much they've entered in the machine.
DisplayMachine($"You have inserted ${input}. Please make your selection");
picked = ReadLine()?.ToLower();
// Verify if user's input is valid.
if (picked != null && items.Exists(item => item.Location.ToLower() == picked))
{
itemPicked = items.Find(item => item.Location.ToLower() == picked);
// Verify if user inserted enough money for the purchase.
if (itemPicked.Price < input)
{
// Verify if item is available for purchase.
if (itemPicked.ReduceInventory())
{
// Purchase success.
DisplayMachine($"Vending {itemPicked}",
$"Your change is {MakeChange(itemPicked, input)} (Press any key to continue)");
ReadKey();
}
else
{
// Failed: Show error if item is out of stock.
ShowError($"Your selected item: {itemPicked} is not available.", true);
}
}
else
{
// Failed: Show error if the money inserted is not enough for the item.
ShowError($"Your selected item: {itemPicked} is more than the money you inserted.", true);
}
}
else
{
// Failed: Show error if item doesn't exist.
ShowError("Invalid entry . . .", true);
}
}
