Convert Netscape bookmark export files from HTML to JSON using Node.js

bookmark-convert.js

const fs = require('fs')
const path = require('path')
const cheerio = require('cheerio')
const inputFile = process.env.INPUT || process.argv[2] || 'bookmarks.html'
const outputFile = process.env.OUTPUT || process.argv[3] || 'bookmarks.json'
const inputFilePath = path.resolve(inputFile)
const outputFilePath = path.resolve(outputFile)

fs.readFile(inputFilePath, { encoding: 'utf8' }, (error, data) => {
  if (error)
    return console.error(error)
  const $ = cheerio.load(data)
  function parseTerm(element, out) {
    const item = {}
    if (element.name === 'dt') {
      parseTerm($(element).children(':not(p)').first().get()[0], out)
    } else if (element.name === 'h3') {
      item.title = $(element).text()
      item.type = 'folder'
      item.updated = $(element).attr('last_modified')
      item.children = []
      out.push(item)
      parseList($(element).next(), item.children)
    } else if (element.name === 'a') {
      item.title = $(element).text()
      item.type = 'link'
      item.added = $(element).attr('add_date')
      item.href = $(element).attr('href')
      item.icon = $(element).attr('icon')
      out.push(item)
    }
  }
  function parseList(list, out) {
    list.children(':not(p)').each(function (index) {
      parseTerm(this, out)
    })
  }
  const out = []
  parseList($('dl').first(), out)
  fs.writeFile(outputFilePath, JSON.stringify(out, null, 2), error => {
    if (error)
      return console.error(error)
    console.log('Success!')
  })
})