Takes a setlist.fm setlist ID and creates a playlist in iTunes based on the setlist

setlist-music.js

#!/usr/bin/env node

/* global Application */
/* eslint-disable no-console */

const fetch = require('node-fetch');
const osa = require('osa2');
require('array-flat-polyfill');

const API_KEY = 'd1be89b2-08b8-4b93-9ebd-eeca6544bdbd';

process.chdir(__dirname);

const getSongsFromSetlist = setlistId => {
  const req = fetch(`https://api.setlist.fm/rest/1.0/setlist/${setlistId}`, {
    headers: { Accept: 'application/json', 'x-api-key': API_KEY },
  });

  return req
    .then(response => response.json())
    .then(data => {
      return [
        data.artist.name,
        data.sets.set
          .flatMap(set => set.song)
          .filter(song => !song.tape)
          .map(song => song.name),
      ];
    });
};

const addSongsToMusic = osa((artist, songs) => {
  const app = Application('Music');
  const destinationPlaylist = app.UserPlaylist().make();
  destinationPlaylist.name = artist;

  songs.forEach(name => {
    const matchedNames = app.playlists.whose({ name: 'Library' })[0].tracks.whose({ name: { _equals: name } });

    for (let i = 0; i < matchedNames.length; i++) {
      if (matchedNames[i].artist().toLowerCase() === artist.toLowerCase()) {
        matchedNames[i].duplicate({ to: destinationPlaylist });
        songs = songs.filter(n => n !== name);
      }
    }
  });

  return songs;
});

getSongsFromSetlist(process.argv[2]).then(([artist, songs]) => {
  addSongsToMusic(artist, songs)
    .then(songs => {
      if (songs.length) {
        console.log('The following songs were not found:');
        console.table(songs);
      }
    })
    .catch(console.error);
});