!752

static class Sister {
  S name, url, robotURL;
}

static Sister sister;

p {
  load("sister");
}

static boolean has() {
  ret sister != null;
}

synchronized answer {
  if "do you have a sister"
    ret yn(has());
  if "what is your sister's name"
    if (!has())
      ret "Ain't got no sister yo";
    else
      ret or(sister.name, "I don't know");
  if "what is your sister's url"
    if (!has())
      ret "Ain't got no sister yo";
    else
      ret or(sister.url, "I don't know");
  if "what is your sister's robot url"
    if (!has())
      ret "Ain't got no sister yo";
    else
      ret or(sister.robotURL, "I don't know");
      
  if (master()) {
    // master stuff
    
    if "now you have a sister" {
      makeSister();
      ret "Cool!";
    }
    
    if "you have no sister anymore" {
      if (has()) { 
        sister = null;
        save("sister");
        ret "Aw... what happened to her?";
      }
      ret "Woot? Didn't have one anyway";
    }
    
    if "your sister's name is *" exceptionToUser {
      if (!has()) makeSister();
      sister.name = eqic("unknown", m.unq(0)) ? null : m.unq(0);
      save("sister");
      ret "OK!";
    }
    
    if "your sister's url is *" exceptionToUser {
      S url = m.unq(0);
      if (!has()) makeSister();
      if (eqic("unknown", url))
        sister.url = null;
      else {
        assertTrue("not an url", isURL(url));
        sister.url = url;
      }
      save("sister");
      ret "OK!";
    }
    
    if "your sister's robot url is *" exceptionToUser {
      S url = m.unq(0);
      if (!has()) makeSister();
      if (eqic("unknown", url))
        sister.robotURL = null;
      else {
        assertTrue("not an url", isURL(url));
        sister.robotURL = url;
      }
      save("sister");
      ret "OK!";
    }
  }    
}

static synchronized Sister _get() {
  ret sister;
}

static void makeSister() {
  sister = new Sister;
  save("sister");
}