!759

static class PerUser {

  S dialogID;

  S name;

}

static new Map<S, PerUser> perUserMap; // key = dialogID

static new ThreadLocal<PerUser> puCurrent;

p {

  load("perUserMap");

  makeBot("User Name Bot");

}

synchronized answer {

  if (!attn ()) null;

  // init per-user stuff

  S dialogID = getDialogID();

  if (dialogID == null) ret null; // need a dialog id to proceed

  PerUser pu = perUserMap.get(dialogID);

  if (pu == null) {

    pu = new PerUser;

    pu.dialogID = dialogID;

    printFormat("Created new dialog: *", dialogID);

    perUserMap.put(dialogID, pu);

  }

  puCurrent.set(pu);

  if (matchStart("my name is", s, m) || matchStart("i am", s, m) || matchStart("you can call me", s, m) || matchStart("call me", s, m) || matchStart("they call me", s, m) || matchStart("my friends call me", s, m)) {

    pu.name = unquote(m.rest().trim());

    save("perUserMap");

    ret "Hello " + pu.name + "!";

  }

  if (match("who am i?", s) || match("eleu what's my name", s)) {

    if (nempty(pu.name))

      ret "You are " + pu.name + ".";

    ret "I don't know, stranger. Who are you?";

  }

}

static synchronized S getUserName() {

  PerUser pu = perUserMap.get(getDialogID());

  ret pu == null ? null : pu.name;

}