handle method

@override bool handle(Map<String, dynamic> info)

Handle the validation, the info variable will contain the following: info'rule' = Validation rule i.e "min". info'data' = Data the user has passed into the validation. info'message' = Overriding message to be displayed for validation (optional).

Implementation

@override
bool handle(Map<String, dynamic> info) {
  RegExp regExp = RegExp(r'(^[0-9]{4}?[0-9]$|^[0-9]{4}?[0-9]-[0-9]{4}$)');
  super.handle(info);
  return regExp.hasMatch(info['data'].toString());
}