public string CallNumber()
{
if (Number.All(char.IsDigit))
{
return($"Calling... {Number}");
}
return("Invalid number!");
}
public void Validate()
{
if (!Number.All(c => char.IsNumber(c)))
{
throw new CardValidationException("Card number is not numeric");
}
if (!ExpiryYear.All(c => char.IsNumber(c)))
{
throw new CardValidationException("Expiry year is not numeric");
}
if (!ExpiryMonth.All(c => char.IsNumber(c)))
{
throw new CardValidationException("Expiry month is not numeric");
}
int month = int.Parse(ExpiryMonth);
if (month < 1 || month > 12)
{
throw new CardValidationException("Expiry Month invalid");
}
int year = int.Parse(ExpiryYear);
year += year > 89 ? 1900 : 2000;
month++;
if (month > 12)
{
month = 1;
year++;
}
var cardExpiryDate = new DateTime(year, month, 1);
if (timeService.Now >= cardExpiryDate)
{
throw new CardValidationException("Card has expired");
}
}
