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!7

concept Emoji {
  S unicode;
  S description;
  S keywords; // with plus
  S posNeg; // positive/negative?
}

cmodule EmojisCRUD > DynCRUD<Emoji> {
  start {
    dbIndexing(Emoji, 'unicode);
    dm_registerAs('emojisCRUD);
  }
  
  // API
  
  Emoji addEmoji(S unicode) {
    Emoji e = uniq_sync(Emoji, +unicode);
    if (empty(e.keywords))
      cset(e, keywords := joinWithSpacedPlus(simpleUnicodeEmojiList().get(unicode)));
    ret e;
  }
  
  S getPosNeg(S unicode) {
    ret getString posNeg(conceptWhere(Emoji, +unicode));
  }
  
  S getKeywords(S unicode) {
    ret getString keywords(conceptWhere(Emoji, +unicode));
  }
  
  void setPosNeg(S unicode, S posNeg) {
    cset(addEmoji(unicode), +posNeg);
  }
  
  LPair<S> emojisWithPosNeg() {
    ret map(func(Emoji e) -> PairS { pair(e.unicode, e.posNeg) },
      [list(Emoji) | nempty(posNeg)]);
  }
}