validateWebsiteNullable static method

String? validateWebsiteNullable(
  1. String? value
)

Version of validateWebsite that does not care if the value is null, useful for social links.

Implementation

static String? validateWebsiteNullable(String? value) {
  if (value == null || value == '') {
    return null;
  }

  final regex = RegExp(
    r'^(https?|ftp)://[^\s/$.?#].\S*$',
    caseSensitive: false,
    multiLine: false,
  );

  if (!regex.hasMatch(value)) {
    return 'Value must be a valid website URL';
  }

  return null;
}