Script that updates Slack status with what you're currently listening to on Google Play Music

music-slack.js

let currentSongTitle = ""
let currentSongPart = 0
let songLength = ''
const token = ""
const target = document.querySelector('#player')

const observer = new WebKitMutationObserver(() => {
	const currentlyPlayingTitle = document.getElementById('currently-playing-title')
	if (!currentlyPlayingTitle) return
    const newSongTitle = currentlyPlayingTitle.innerText
    const songTime = toSeconds(document.getElementById('time_container_current').innerText)
    songLength = toSeconds(document.getElementById('time_container_duration').innerText)
    const newSongPart = Math.trunc((songTime/songLength) * 10)

	if (songLength === 0) return
    if (currentSongTitle !== newSongTitle) {
    	currentSongTitle = newSongTitle
		currentSongPart = newSongPart
    	updateSlack()
    } else if (currentSongPart !== newSongPart) {
    	currentSongPart = newSongPart
    	updateSlack()
    }
})
observer.observe(target, { childList: true, characterData: true, subtree: true })

function updateSlack() {
	const newSongArtist = document.getElementById('player-artist').innerText
	const newSongLength = document.getElementById('time_container_duration').innerText
	let musicParts = Array(10).fill(':mi:')
	musicParts[currentSongPart] = ':bl:'
	const encodedProfile = encodeURI(JSON.stringify({
	"status_text": `:pl:${musicParts.join('')} ${newSongLength} - ${currentSongTitle} by ${newSongArtist}`,
	"status_emoji": ":musical_note:",
	}))
	
	
	fetch(`https://slack.com/api/users.profile.set?profile=${encodedProfile}&token=${token}`)
	.then(response => response.json())
	.then(json => console.log("Updated song"))
}

function toSeconds(time) {
  const parts = time.split(":");
  const minutes = Number(parts[0]);
  const seconds = Number(parts[1]);
  return seconds + minutes * 60;
}