isValid method
function to check if the provider aadhaar
is valid or not.
return true if the aadhaar
seems to be valid.
Implementation
bool isValid(String? aadhaar) {
if (aadhaar == null) return false;
// remove the spaces from aadhaar
String aadhaarWithoutSpace = aadhaar.replaceAll(RegExp(r"\s+"), "");
if (aadhaarWithoutSpace.length != 12) {
// aadhaar length must be 12
return false;
}
RegExp aadhaarRegEx = RegExp(r'[2-9]{1}[0-9]{3}[0-9]{4}[0-9]{4}');
if (!aadhaarRegEx.hasMatch(aadhaarWithoutSpace)) {
// aadhaar regular expression not matched
return false;
}
// now validate with Verhoeff algorithm
return VerhoeffAlgorithm.validateVerhoeff(aadhaarWithoutSpace);
}