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!7

set flag AllowMetaCode. set flag Reparse.
meta-postProcess { 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 lines(mapOverClone(db, x -> format(ellipsisToStar(pat), x))); }
  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/me ... = -
        What do we need = listWithPattern("We need ...")
        We don't need ... anymore = -
        We need nothing|We don't need anything = clear after confirm
    
      ]];
    
      LS tok = javaTok(program);
      jreplace(tok, "+", "add(\\$1);");
      jreplace(tok, "-", "remove(\\$1);");
      jreplace(tok, "clear after confirm", "clearAfterConfirm();");
      LS lines = lines(join(tok));
      lines = map(lines, l -> {
        PairS p = splitAtEquals_pair(l);
        ret p == null ? l : "if (matchX2(\*quote(p.a)*/, s, m)) ret \*p.b*/;";
      });
      ret lines(lines);
    }
    null;
  }
}