rss-unlimited/server/xml.js

const XML = {
  parse(string) {
    let result = null
    xml2js.parseString(string, (err, doc) => {
      if (err) throw err
      result = doc
    })
    if (!result) throw new Error('Async?')
    return result
  },
  stringify(doc) {
    const builder = new xml2js.Builder()
    return builder.buildObject(doc)
  }
}