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const fs = require('fs')
const path = require('path')
const xmldoc = require('xmldoc')
const { promisify } = require('util')
const readFile = promisify(fs.readFile)
function getDictValue(dict, key) {
if (dict.name !== 'dict') {
throw new Error("Not a dict: " + dict.name)
}
for (let i = 0; i < dict.children.length; i++) {
const child = dict.children[i]
if (child.name === 'key') {
if (child.val === key) {
return dict.children.slice(i + 1).find(item => !item.text)
}
}
}
return null
}
async function crawl(libraryXML) {
const document = new xmldoc.XmlDocument(libraryXML)
const libraryDict = document.children.find(child => child.name === 'dict')
const tracksDict = getDictValue(libraryDict, 'Tracks')
const trackDicts = tracksDict.children.filter(child => child.name === 'dict')
const result = []
for (let trackDict of trackDicts) {
let kind = getDictValue(trackDict, 'Kind')
kind = kind && kind.val
kind = kind || ''
if (!kind.includes('audio file')) {
continue
}
let location = getDictValue(trackDict, 'Location')
location = location && location.val
location = location || ''
if (!location) {
continue
}
let name = getDictValue(trackDict, 'Name')
name = name && name.val
name = name || 'Unknown Name'
let album = getDictValue(trackDict, 'Album')
album = album && album.val
album = album || 'Unknown Album'
let artist = getDictValue(trackDict, 'Artist')
artist = artist && artist.val
artist = artist || 'Unknown Artist'
// console.log(`${artist} - ${name} (${album})`)
const group = (arr, title) => arr.find(g => g[0] === title)
let artistGroup = group(result, artist)
if (!artistGroup) {
artistGroup = [artist, []]
result.push(artistGroup)
}
let albumGroup = group(artistGroup[1], album)
if (!albumGroup) {
albumGroup = [album, []]
artistGroup[1].push(albumGroup)
}
albumGroup[1].push([name, location])
}
return result
}
async function main() {
const libraryPath = process.argv[2] || (
`${process.env.HOME}/Music/iTunes/iTunes Music Library.xml`
)
const library = await readFile(libraryPath)
const playlist = await crawl(library)
console.log(JSON.stringify(playlist, null, 2))
}
main()
.catch(err => console.error(err))
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