deserializeBaseFlag function

bool deserializeBaseFlag(String data, { required String prefix, })

Deserializes the base flag and returns true if typed clone, false if dynamic.

Throws DeserializationFormatException if the input is malformed.

Implementation

bool deserializeBaseFlag(final String data, {required final String prefix}) {
  final lng = data.length;
  if (lng == 0) {
    throw DeserializationFormatException('empty data', invalidValue: data);
  }
  String raw;
  if (lng == 1) {
    raw = data;
  } else {
    final prefixLng = prefix.length;
    if (lng != prefixLng + 1) {
      throw DeserializationFormatException(
        'length != $prefixLng',
        invalidValue: data,
      );
    }
    if (!data.startsWith(prefix)) {
      throw DeserializationFormatException(
        'must start with $prefix',
        invalidValue: data,
      );
    }
    raw = data.substring(prefixLng);
  }
  switch (raw) {
    case _sTyped:
      return true;
    case _sDynamic:
      return false;
    default:
      throw DeserializationFormatException(
        'malformed doTypedClone',
        invalidValue: raw,
      );
  }
}