const
  util = require('util'),
  ObjectId = require('mongodb').ObjectId,
  User = require('../model/user'),
  UserTypes = require('../helpers/constants').UserTypes;

/**
 * Get Parent User (Applicator) Id given a userId
 * @param {*} uid UserId
 * @param {*} cb 
 */
function getPuid(uid, cb) {
  User.findById({ _id: ObjectId(uid) })
    .then(u => {
      cb(null, u.kind === UserTypes.APP ? u._id : u.parent);
    })
    .catch(err => { cb(err); return; });
}

module.exports = {
  getPuid, getPuidASync: util.promisify(getPuid)
}