part sort object from query string in javascript

handler.js

const records = await eventColl
      .aggregate([
        {
          $match: {
            company_id,
            soft_delete: false,
          },
        },
        {
          $sort: sortObj,
        },
        {
          $skip: (parseInt(page, 10) - 1) * parseInt(limit, 10),
        },
        {
          $limit: parseInt(limit, 10),
        },
      ])
      .toArray();

parseSortObjectFromQuery.js

const querystring = require('querystring');

module.exports = query =>
  Promise.resolve(
    querystring
      .unescape(query.sort_by)
      .split(',')
      .map(e => e.split(' '))
      .reduce(
        (o, currentObj) =>
          Object.assign(o, {
            [currentObj[0]]: currentObj[1] === 'asc' ? 1 : -1,
          }),
        {}
      )
  );