defaultIsolateHandler function

Future<void> defaultIsolateHandler(SendPort sendPort)

This is the default handler function used by PasswordScoringIsolateHandler.

It will initialize the zxcvbn with the default options and then wait for Locale or String messages. When it receives a Locale message it will update the Options of zxcvbn and when it receives a ScoringRequest message it will calculate the score and send the Result message back.

Implementation

@pragma('vm:entry-point')
Future<void> defaultIsolateHandler(SendPort sendPort) async {
  ReceivePort receivePort = ReceivePort();

  // Always send the [SendPort] as first message
  sendPort.send(receivePort.sendPort);

  // Default handler only supports Common language package
  final langCommon = LanguageCommon();

  zxcvbn.setOptions(Options(
    dictionary: Dictionary.merge([
      langCommon.dictionary,
    ]),
    graphs: langCommon.adjacencyGraphs,
    translations: langCommon.translations,
  ));

  // Used to refresh response when locale changes
  ScoringRequest? lastRequest;

  await for (var message in receivePort) {
    if (message is Locale) {
      // Default handler doesn't support switching locales
    } else if (message is ScoringRequest) {
      lastRequest = message;
    }

    if (lastRequest != null) {
      final Result result = zxcvbn(
        lastRequest.password,
        options: lastRequest.options,
        userInputs: lastRequest.userInputs,
      );
      sendPort.send(result);
    }
  }
}