validator method

@override String? validator(BuildContext context, String value)

Implement in subclasses to provide validation logic.

Implementation

@override
String? validator(BuildContext context, String value) {
  if (value.trim().isEmpty) {
    return HyttaHubLocalizations.of(context)!.memberNameEmptyError;
  }
  if (value.trim().toLowerCase() != originalName.toLowerCase() &&
      members.any(
        (member) => member.name.toLowerCase() == value.trim().toLowerCase(),
      )) {
    return HyttaHubLocalizations.of(context)!.memberNameExistsError;
  }
  return null;
}