Snippet: Spotify Currently Playing

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Spotify Currently Playing

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Display the song currently playing on your Spotify account

A useful JavaScript code snippet, using Spotify's APIs to fetch the currently playing track on your Spotify account. This example uses Next.js API Routes.

// /lib/spotify.js
const client_id = process.env.SPOTIFY_CLIENT_ID
const client_secret = process.env.SPOTIFY_CLIENT_SECRET
const refresh_token = process.env.SPOTIFY_REFRESH_TOKEN

const getAccessToken = async () => {
  const response = await fetch('https://accounts.spotify.com/api/token', {
    method: 'POST',
    headers: {
      Authorization: `Basic ${Buffer.from(`${client_id}:${client_secret}`).toString('base64')}`,
      'Content-Type': 'application/x-www-form-urlencoded'
    },
    body: new URLSearchParams({
      grant_type: 'refresh_token',
      refresh_token: refresh_token
    })
  })

  return response.json()
}

export const getNowPlaying = async () => {
  const { access_token } = await getAccessToken()

  return fetch('https://api.spotify.com/v1/me/player/currently-playing', {
    headers: {
      Authorization: `Bearer ${access_token}`
    }
  })
}
// /api/currently-playing.js
import { getNowPlaying } from '#/lib/spotify'

export default async function handler(req, res) {
  const response = await getNowPlaying()

  if (response.status === 204 || response.status > 400) {
    return res.status(200).json({ isPlaying: false })
  }

  const song = await response.json()

  if (song.item === null) {
    return res.status(200).json({ isPlaying: false })
  }

  const isPlaying = song.is_playing
  const title = song.item.name
  const artist = song.item.artists.map((_artist) => _artist.name).join(', ')
  const album = song.item.album.name
  const albumImageUrl = song.item.album.images[0].url
  const songUrl = song.item.external_urls.spotify

  return res.status(200).json({
    album,
    albumImageUrl,
    artist,
    isPlaying,
    songUrl,
    title
  })
}

The `spotify.js` file contains a function called `getNowPlaying` that gets the user's access token for Spotify and uses it to fetch the currently playing song using the Spotify Web API. It returns the fetched data as a Promise.

The `currently-playing.js` file is an API route that calls the `getNowPlaying` function from the `spotify.js file`. It then checks whether the response from the API call is valid and contains a playing song. If it does, it returns a JSON object containing information about the song such as its title, artist, album, album image, and URL. If there is no currently playing song, it returns a JSON object indicating that there is no song playing.

Together, these components provide a way to display information about the currently playing song on a user's Spotify account.

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