!7

set flag AllowMetaCode. set flag Reparse. meta-transformNow { tok_standardBot }

standard bot WeNeed {
  Set<S> db = ciSet();
  
  S add(S s) { if (db.add(s)) change(); null; }
  S remove(S s) { ret db.remove(s) ? with(r change, "What a relief") : null; }
  S listWithPattern(S pat) { ret or2(lines(map(db, x -> format(ellipsisToStar(pat), x))), "nothing"); }
  S clearAfterConfirm() { ret "You're kidding, right?"; }

  sync S processSimplifiedLine(S s, O... _) {
    try answer super.processSimplifiedLine(s, _);
    new Matches m;
    
    meta {
      S program = [[
        We need ... = +
        We have ... = -
        Someone gave us ...|Someone gave me ... = -
        What do we need = listWithPattern("We need ...")
        We don't need ... anymore = -
        We need nothing|We don't need anything = clear after confirm
      ]];
      ret ai_lineEquationsToMatchX2Statements(jreplace_multi(program,
        "+", "add(\\$1);",
        "-", "remove(\\$1);",
        "clear after confirm", "clearAfterConfirm();"));
    }
    null;
  }
}