oi.js

const {ObjectId} = require('mongodb')

function parse(input) {
  if (!input) {
    return
  }

  if (input._id) {
    input = input._id
  }

  if (input instanceof ObjectId) {
    return input
  }

  if (typeof input === 'string' && ObjectId.isValid(input)) {
    return new ObjectId(input)
  }
}

function equals(left, right) {
  const ol = parse(left)
  const or = parse(right)

  return Boolean(ol) && ol.equals(or)
}

exports.parse = parse
exports.equals = equals