sclass CruddieFollower {
  S cookie;
  int n;
  
  swappable void newDialog() {}
  swappable void botUtterance(S html) {}
  
  *(S *cookie) {}

  // may block for 60 seconds. returns HTML
  public S get() {
    S src = loadPageWithParams("https://cruddie.site/bot/incremental",
      +cookie, n := zeroToNull(n));
    S newN = firstIntAsString_regexp(src);
    if (nempty(newN)) {
      if (cic(src, "NEW DIALOG -->")) newDialog();
      n = parseInt(newN);
    } else
      doForEach botUtterance(regexpExtractAll([[bot-utterance">(.*?)<]], src));
    ret src;
  }
}