static void Main(string[] args)
{
//Get our data, Creating the cards.
List <CardModel> cards = new List <CardModel>()
{
new CardModel(1, 12345, null, 250.00, "Lloyds", string.Empty, 0, false),
new CardModel(2, 55555, null, 100.50, "HSBC", string.Empty, 0, false),
new CardModel(3, 99999, null, 1000, "Bank Of England", string.Empty, 0, false),
};
WalletModel wallet = new WalletModel(balance: 230);
SecurityManager.CreatePinHash(ref cards, ref wallet);
Console.WriteLine("Clear console to hide passwords? Y/N");
if (Console.ReadLine().ToLower().Contains("y"))
{
Console.Clear();
}
//Create the list of options used on line 55
IDictionary <int, string> ATMoptions = new Dictionary <int, string>
{
{ 1, "Cancel" },
{ 2, "View Balance" },
{ 3, "Withdraw Wibbly Dollars To Wallet" },
{ 4, "Deposit Wibbly Dollars From Wallet" }
};
//This ensures the app is always running
Console.WriteLine("To return here just write \"cancel\" anywhere");
TheActualProgram(ref cards, ref wallet, ATMoptions);//Yea lets not talk about the method naming
}
public static void CreatePinHash(ref List <CardModel> cards, ref WalletModel wallet)
{
int pin;
for (int i = 0; i < cards.Count; i++)
{
Console.Write($"Insert pin for your card number {cards.ElementAt(i).CardId} registered with the bank {cards.ElementAt(i).BankName}: ");
if (!int.TryParse(Console.ReadLine(), out pin))
{
Console.WriteLine("Value inserted not accepted, try again");
i--;
continue;
}
byte[] salt;
new RNGCryptoServiceProvider().GetBytes(salt = new byte[16]);
var bytes = BitConverter.GetBytes(pin);
var pbkdf2 = new Rfc2898DeriveBytes(bytes, salt, 100000);
byte[] hash = pbkdf2.GetBytes(20);
byte[] hashBytes = new byte[36];
Array.Copy(salt, 0, hashBytes, 0, 16);
Array.Copy(hash, 0, hashBytes, 16, 20);
cards.ElementAt(i).PasswordHash = Convert.ToBase64String(hashBytes);
}
pin = 0;
}
static void DepositWibblyDollars(int amount, CardModel chosenCard, WalletModel wallet)
{
string message = "Not enough funds\n";
if (amount <= wallet.Balance)
{
message = $"You deposited {amount} Wibbly Dollars";
chosenCard.Balance += amount;
wallet.Balance -= amount;
}
Console.WriteLine(message);
}
static void WithdrawWibblyDollars(int amount, CardModel chosenCard, WalletModel wallet)
{
//sets the message to not enough funds
string message = "Not enough funds\n";
//if the condition is true change the message and subtract the amount from the balance
if (amount <= chosenCard.Balance)
{
message = $"You withdrew {amount} Wibbly Dollars";
chosenCard.Balance -= amount;
wallet.Balance += amount;
}
Console.WriteLine(message);
}
static void TheActualProgram(ref List <CardModel> cards, ref WalletModel wallet, IDictionary <int, string> ATMoptions)
{
while (true)
{
bool cardHasBeenEntered = false;
Console.WriteLine("Free Cash Withdrawal, Please Enter a Card...");
//This is a discard, once the try prase returns true it will discard the returned value
if (!int.TryParse(Console.ReadLine(), out int enteredCardId))
{
Console.WriteLine("Value inserted not accepted, please check you typed everything right and try again");
continue;
}
//Find the card with the entered cardId from the above ReadLine()
CardModel chosenCard = cards.Find(c => c.CardId == enteredCardId);
//If card is equal to null, meaning it hasnt found the card entered, dont go to the next step
if (chosenCard == null)
{
Console.WriteLine("Card inserted not found, please try with another card\n");
continue;
}
if (chosenCard.IsCardLocked)
{
Console.WriteLine("Card has been locked due to security reasons, please choose another card\n");
continue;
}
//set the card entered to true and go to next step
cardHasBeenEntered = true;
string input;
if (!SecurityManager.IsPinValid(ref cardHasBeenEntered, ref chosenCard))
{
if (!cardHasBeenEntered || chosenCard.IsCardLocked)
{
continue;
}
}
chosenCard.NumberOfFailedAttempts = 0;
SelectOptions(ref cardHasBeenEntered, ATMoptions, ref chosenCard, ref wallet);
}
}
static void SelectOptions(ref bool cardHasBeenEntered, IDictionary <int, string> ATMoptions, ref CardModel chosenCard, ref WalletModel wallet)
{
string input;
while (cardHasBeenEntered)
{
//Tell the user to chose from a list of options
Console.WriteLine("Choose from a list of options....");
//loop through the options declared on line 21, and print
foreach (KeyValuePair <int, string> option in ATMoptions)
{
Console.WriteLine($"{option.Key}: - {option.Value}");
}
input = Console.ReadLine();
if (input.ToLower().Contains("cancel"))
{
cardHasBeenEntered = false;
break;
}
bool validChosenAction = int.TryParse(input, out int chosenAction);
if (!validChosenAction)
{
continue;
}
// If the chosen value is value go into the specifics of the options
ChoosenActionSwitch(chosenAction, ref cardHasBeenEntered, ref chosenCard, ref wallet);
}
}
static void ChoosenActionSwitch(int chosenAction, ref bool cardHasBeenEntered, ref CardModel chosenCard, ref WalletModel wallet)
{
string input;
switch (chosenAction)
{
case 1:
//returns the user to the welcome page and clears the console
cardHasBeenEntered = false;
Console.Clear();
break;
case 2:
//Displays the value of the current card/account
Console.WriteLine($"W: {chosenCard.Balance} Wibbly Dollars.\nWallet balance: {wallet.Balance}");
break;
case 3:
//This could be put into a method but it would be harder to read, lets leave it here
while (true)
{
//ask the user to enter an amount to withdraw
Console.WriteLine($"Select an amount to withdraw...");
input = Console.ReadLine();
if (input.ToLower().Contains("cancel"))
{
cardHasBeenEntered = false;
break;
}
if (int.TryParse(input, out int ammount))
{
if (ammount < 0)
{
Console.WriteLine("Inserted value can not be negative\n");
}
else
{
WithdrawWibblyDollars(ammount, chosenCard, wallet);
break;
}
}
else
{
Console.WriteLine($"Inserted value isnt acccepted, try again\n");
}
}
break;
case 4:
//This could be put into a method but it would be harder to read, lets leave it here
while (true)
{
//ask the user to enter an amount to withdraw
Console.WriteLine($"Select an amount to deposit...");
input = Console.ReadLine();
if (input.ToLower().Contains("cancel"))
{
cardHasBeenEntered = false;
break;
}
if (int.TryParse(input, out int ammount))
{
if (ammount < 0)
{
Console.WriteLine("Inserted value can not be negative\n");
}
else
{
DepositWibblyDollars(ammount, chosenCard, wallet);
break;
}
}
else
{
Console.WriteLine($"Inserted value isnt acccepted, try again\n");
}
}
break;
default:
Console.WriteLine($"Inserted value isnt acccepted, try again\n");
break;
}
}
