How to stay on the same step of ReplyFlow

[rubenlagus]

Discussed in #990

^{Originally posted by DUrayev November 3, 2021}
Hello everyone!
Suppose I want to make kind of infinity loop of my reply until some condition is not met. For example, I'm asking user for a password in the action of my ReplyFlow. I want the same ReplyFlow to continue processing the next reply if password is incorrect.
The best option would be to add "self" reference in ".next()" method of ReplyFlow builder, but it's not possible.

Could you suggest any workaround?

Consider the following example of my request password flow:

private ReplyFlow passwordEnteredFlow() {
        return ReplyFlow.builder(db())
                .onlyIf(Flag.MESSAGE)
                .action((bot, upd) -> {
                    String password = upd.getMessage().getText();
                    SomeExternalService service = SomeExternalService.getInstance();
                    service.login(password, response -> {
                        if (response.isError()) {
                            silent().send("Incorrect password. Try again:", getChatId(upd));
                        } else {
                            sender().execute(SendMessage.builder()
                                    .text("You're successfully logged in. Select the following action:")
                                    .chatId(getChatId(upd).toString())
                                    .replyMarkup(KeyboardFactory.withOneLineButtons("Option 1", "Option 2")
                                    .build());
                        }
                    });
                })
                .next(getSuccessLoginFlow())
                .build();
    }

Thanks in advance!