public static bool IsPinValid(ref bool cardHasBeenEntered, ref CardModel chosenCard)
{
string input;
int InsertedPin;
byte[] intBytes;
bool correctPassword;
while (true)
{
correctPassword = true;
Console.WriteLine("Insert the pin number of the selected card");
input = Console.ReadLine();
if (input.ToLower().Contains("cancel"))
{
cardHasBeenEntered = false;
break;
}
if (!int.TryParse(input, out InsertedPin))
{
Console.WriteLine("Inserted value not accepted, please try again\n");
continue;
}
intBytes = BitConverter.GetBytes(InsertedPin);
string savedPasswordHash = chosenCard.PasswordHash;
byte[] hashBytes = Convert.FromBase64String(savedPasswordHash);
byte[] salt = new byte[16];
Array.Copy(hashBytes, 0, salt, 0, 16);
var pbkdf2 = new Rfc2898DeriveBytes(intBytes, salt, 100000);
byte[] hash = pbkdf2.GetBytes(20);
for (int i = 0; i < 20; i++)
{
if (hashBytes[i + 16] != hash[i])
{
correctPassword = false;
chosenCard.NumberOfFailedAttempts += 1;
Console.WriteLine($"Inserted pin is incorrect, amount of tries remaining {3 - chosenCard.NumberOfFailedAttempts}\n");
if (chosenCard.NumberOfFailedAttempts == 3)
{
chosenCard.IsCardLocked = true;
Console.WriteLine("Card has been locked since there have been 3 failed attempts\n");
}
break;
}
}
if (chosenCard.IsCardLocked || correctPassword)
{
break;
}
}
if (chosenCard.IsCardLocked || !cardHasBeenEntered)
{
return(false);
}
else
{
return(true);
}
}
static void SelectOptions(ref bool cardHasBeenEntered, IDictionary <int, string> ATMoptions, ref CardModel chosenCard, ref WalletModel wallet)
{
string input;
while (cardHasBeenEntered)
{
//Tell the user to chose from a list of options
Console.WriteLine("Choose from a list of options....");
//loop through the options declared on line 21, and print
foreach (KeyValuePair <int, string> option in ATMoptions)
{
Console.WriteLine($"{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 Main(string[] args)
{
//Get our data, Creating the cards.
List <CardModel> cards = new List <CardModel>()
{
new CardModel(1, 12345, 1111, 250.00, "Lloyds"),
new CardModel(2, 55555, 2222, 100.50, "HSBC"),
new CardModel(3, 99999, 3333, 1000, "Bank Of England"),
};
//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" },
};
//This ensures the app is always running
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
_ = int.TryParse(Console.ReadLine(), out int enteredCardId);
//Find the card with the entered cardId from the above ReadLine()
CardModel chosenCard = cards.Find(c => c.CardId == enteredCardId);
//If card is not equal to null, meaning it has found the card entered, go to the next step
if (chosenCard != null)
{
//set the card entered to true and go to next step
cardHasBeenEntered = true;
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($"{option.Key}: - {option.Value}");
}
bool validChosenAction = int.TryParse(Console.ReadLine(), out int chosenAction);
// If the chosen value is value go into the specifics of the options
if (validChosenAction)
{
switch (chosenAction)
{
case 1:
//returns the user to the welcome page and clears the console
cardHasBeenEntered = false;
Console.Clear();
break;
case 2:
//Displays the value of the current card/account
Console.WriteLine($"W: {chosenCard.Balance} Wibbly Dollars.");
break;
case 3:
//ask the user to enter an amount to withdraw
Console.WriteLine($"Select an amount to withdraw...");
bool validWithdrawal = int.TryParse(Console.ReadLine(), out int ammount);
//if its valid go to method
if (validWithdrawal)
{
WithdrawWibblyDollars(ammount, chosenCard);
}
break;
default:
break;
}
}
}
}
}
static void ChoosenActionSwitch(int chosenAction, ref bool cardHasBeenEntered, ref CardModel chosenCard, ref WalletModel wallet)
{
string input;
switch (chosenAction)
{
case 1:
//returns the user to the welcome page and clears the console
cardHasBeenEntered = false;
Console.Clear();
break;
case 2:
//Displays the value of the current card/account
Console.WriteLine($"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;
}
}
