private static void RecordWithdrawOperation(AtmDbContext context, CardAccount account, decimal amount)
{
context.TransactionsHistory.Add(new TransactionHistory
{
CardNumber = account.CardNumber,
TransactionDate = DateTime.Now,
Amount = amount
});
context.SaveChanges();
}
private static void CheckForEnoughFunds(CardAccount account, decimal amount)
{
if (account == null)
{
throw new ArgumentNullException("account", "There is no such account in the DB");
}
if (account.CardCash < amount)
{
throw new ArgumentException("Not enough funds available in the selected account.", "amount");
}
}
private static void ValidateAccount(CardAccount account, string pin)
{
if (account == null)
{
throw new ArgumentNullException("account", "There is no such account in the DB");
}
if (account.CardPIN != pin)
{
throw new ArgumentException("Invalid PIN for the selected account provided.", "pin");
}
}