using oauth with spotify.com

spotify.ts

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 basic = Buffer.from(`${client_id}:${client_secret}`).toString('base64')
const NOW_PLAYING_ENDPOINT = `https://api.spotify.com/v1/me/player/currently-playing`
const TOP_TRACKS_ENDPOINT = `https://api.spotify.com/v1/me/top/tracks`
const TOKEN_ENDPOINT = `https://accounts.spotify.com/api/token`

async function getAccessToken() {
  const response = await fetch(TOKEN_ENDPOINT, {
    method: 'POST',
    headers: {
      Authorization: `Basic ${basic}`,
      'Content-Type': 'application/x-www-form-urlencoded',
    },
    body: `grant_type=refresh_token&refresh_token=${refresh_token}`,
  })
  return response.json()
}

async function getNowPlaying() {
  const { access_token } = await getAccessToken()

  return fetch(NOW_PLAYING_ENDPOINT, {
    headers: {
      Authorization: `Bearer ${access_token}`,
    },
  })
}

async function getTopTracks() {
  const { access_token } = await getAccessToken()

  return fetch(TOP_TRACKS_ENDPOINT, {
    headers: {
      Authorization: `Bearer ${access_token}`,
    },
  })
}

export { getNowPlaying, getTopTracks }