Napster URL conversion to Sonos UPnP -- Using node-songs to play music.

main.js

const { DeviceDiscovery } = require('sonos');

DeviceDiscovery((device) => {
  //console.log('found device at ' + device.host + " - " + device.friendlyName)

  device.deviceDescription().then(descr => {
    // look for a sonos named "Sonos Roam"
    if (descr.friendlyName.match(/Sonos Roam/)) {
      console.log(descr);
      // Coheed - Vaxis II - first track
      // https://play.napster.com/track/tra.676707759?ocode=social_user&pcode=social_user&cpath=Link&rsrc=track
      // 
      // I learned the song uri by playing a song and then calling currentTrack() to find the uri
      // Then I tried to modify this uri to play a known song.
      // The 'atra.<ID>' seems to be the track name. I'm not entirely sure what the remaining |v1|ALBUM|... bits are
      // For good measure, the 'alb.<NUMBER>.mp4' I inserted the album ID for the album this track is on
      device.play("x-sonos-http:ondemand_track%3a%3atra.676707759|v1|ALBUM|alb.676707757.mp4?sid=202&flags=8232&sn=1");
    }
  });
});