isCardNumberValid static method
Determines whether the credit card number provided is valid
@param cardNumber A credit card number @return true if the credit card number is valid, false otherwise
Implementation
static bool isCardNumberValid(String cardNumber) {
if (cardNumber.isEmpty) {
return false;
}
String ccn = cleanCardNumber(cardNumber);
CardType cardType = getCardType(ccn);
return ccn.length >= 12 &&
ccn.length <= 19 &&
_isNumeric(ccn) &&
_isValidLuhnNumber(ccn) &&
cardType != OTHER;
}