solution.js

const solution = (optionRule) => {
  const stack = [];
  let currentRule = optionRule;
  const groupPattern = /\([^\(\)]+\)/g;
  const delimiters = ['OR', 'AND'];

  const convert = (groupRule) => {
    for (const delimiter of delimiters) {
      const regDelimiter = new RegExp(`[ ]*${delimiter}[ ]*`);
      if (!regDelimiter.test(groupRule)) {
        continue;
      }
      stack.push({
        [delimiter]: groupRule.split(regDelimiter).map((rule) => {
          const option = Number(rule.replace(/\D/g, ''));

          return (/^#\d+#$/.test(rule) && stack[option - 1]) || option;
        }),
      });
      break;
    }
  };

  while (groupPattern.test(currentRule)) {
    currentRule = currentRule.replace(groupPattern, (match) => {
      convert(match.substring(1, match.length - 1));
      return `#${stack.length}#`;
    });
  }

  convert(currentRule);

  return stack.pop();
};

(() => {
  console.log(
    JSON.stringify(solution('{1069} AND ({1070} OR {1071} OR {1072}) AND {1244} AND ({1245} OR {1339})'), null, 2),
  );
})();