retry.dart

typedef FunctionOnRetry = Function(
  dynamic ex,
  int retryCount,
  int retryInMilliseconds,
);

Future<void> onErrorRetry({
  required Future Function() doIt,
  required FunctionOnRetry onRetry,
  required int maxRetries,
  required int delayMilliseconds,
  int retryCount = 0,
}) async {
  try {
    await doIt();
  } catch (ex) {
    if (retryCount < maxRetries) {
      final nextCount = retryCount + 1;
      final retryInMilliseconds = delayMilliseconds * nextCount;

      await Future.delayed(Duration(milliseconds: retryInMilliseconds));

      onRetry(ex, nextCount, retryInMilliseconds);

      await onErrorRetry(
        doIt: doIt,
        onRetry: onRetry,
        maxRetries: maxRetries,
        retryCount: nextCount,
        delayMilliseconds: delayMilliseconds,
      );
    } else {
      rethrow;
    }
  }
}