!752

static boolean activated;

static long lastAction;

static long idleTimeout = 5*60*1000; // 5 minutes

static S data;

p {

  load("data");

  load("lastAction");

  load("activated");

}

synchronized answer {

  if (!tb()) null;

  // activating commands

  if "consider the string *" {

    activate();

    data = m.unq(0);

    save("data");

    ret "OK. " + someInfo();

  }

  if "done with the string" {

    if (!activated) ret "Yeah i know.";

    data = null;

    save("data");

    deactivate();

    ret "OK, " + getName() + " deactivating.";

  }

  if (!activated || data == null) null;

  if (isExpired(lastAction, idleTimeout)) {

    deactivate();

    null;

  }

  if "reverse"

    ret setData(reverseString(data));

  if "show"

    ret show();

  if "length"

    ret l(data) + " chars";

}

static S someInfo() {

  if (data == null) ret "";

  ret "Got " + l(data) + " chars.";

}

static void activate() {

  activated = true;

  save("activated");

  lastAction = now();

  save("lastAction");

}

static void deactivate() {

  activated = false;

  save("activated");

  data = null;

  save("data");

}

static S setData(S s) {

  data = s;

  save("data");

  ret "OK. Got " + show();

}

static S show() {

  if (data == null) ret "No data";

  S s = quote(shorten(data, 100));

  if (l(data) > 100) s += " (" + l(data) + " chars)";

  ret s;

}