url<T> static method

FormeValidator<T> url<T>({ String errorText = '', String? schema, String? host, int? port, })

when valid

1. value is null
2. value is an url

Implementation

static FormeValidator<T> url<T>({
  String errorText = '',
  String? schema,
  String? host,
  int? port,
}) {
  return (f, T v) {
    if (v == null || (v as String).isEmpty) {
      return null;
    }

    final Uri? uri = Uri.tryParse(v);
    if (uri == null) {
      return errorText;
    }

    if (schema != null && schema.isNotEmpty && !uri.isScheme(schema)) {
      return errorText;
    }
    if (host != null && host.isNotEmpty && uri.host != host) {
      return errorText;
    }
    if (port != null && uri.port != port) {
      return errorText;
    }

    return null;
  };
}