public static CreditCardSystem getInstance()
{
if (uniqueInstance == null)
{
uniqueInstance = new CreditCardSystem();
}
return(uniqueInstance);
}
static void customerPayCreditCard(List <Premium> premiums)
{
bool isRunning = true;
while (isRunning)
{
// If no premiums then return function.
if (premiums.Count == 0)
{
Console.WriteLine("No outstanding premiums!");
isRunning = false;
break;
}
// Display premiums.
int no = 1;
foreach (Premium p in premiums)
{
Console.WriteLine("#" + no++);
Console.WriteLine("ID: " + p.getPremiumID());
Console.WriteLine("Details: " + p.getDetails());
Console.WriteLine("Due Date: " + p.getDueDate().ToString());
Console.WriteLine("Amount Payable: $" + p.getAmountPayable().ToString(".00"));
Console.WriteLine();
}
// Get chosen premium from user.
int premiumNo;
while (true)
{
Console.Write("Enter premium no: ");
premiumNo = Convert.ToInt32(Console.ReadLine());
if (premiumNo >= 0 && premiumNo <= premiums.Count)
{
break;
}
else
{
Console.WriteLine("\nInvalid Input!");
}
}
// Retrieve premium.
Premium premium = premiums[premiumNo - 1];
// Get credit card info.
Console.Write("Enter credit card no: ");
int creditCardNo = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter CCV no: ");
int ccv = Convert.ToInt32(Console.ReadLine());
// Process payment
bool paymentSuccess = CreditCardSystem.getInstance().processPayment(creditCardNo, ccv);
if (paymentSuccess)
{
Console.WriteLine("Payment successful!");
Console.WriteLine("Receipt no: " + premium.getPremiumID());
premium.setPaymentType("Credit Card");
premium.setDateTimeOfPayment(DateTime.Now);
}
else
{
Console.WriteLine("Payment unsuccessful!");
}
// Get user option if he wants to continue or return.
while (true)
{
Console.WriteLine("\n\n[1] Pay Another Outstanding Premium(s)\n[0] Return back");
Console.Write("Enter option: ");
int option = Convert.ToInt32(Console.ReadLine());
if (option == 1) // Pay another outstandin premium
{
isRunning = true;
break;
}
else if (option == 0) // Return back
{
isRunning = false;
break;
}
else
{
Console.WriteLine("Invalid option.");
}
}
}
}