spotify.js

const fetch = require('node-fetch');
const configData = require("./config.json");
const CLIENT_ID = configData.clientId;
const CLIENT_SECRET = configData.clientSecret;
// const TOKEN = configData.testToken;
let TOKEN = false
let prevTokenTimestamp = 0


const express = require("express")
const app = express()

app.use(express.static("static"))

// Refresh the token automatically!
app.use((req, res, next)=>{
  refreshTokenIfNecessary()
    .then(()=>next())
})

async function refreshTokenIfNecessary() {
  if (Date.now() - prevTokenTimestamp > 3550) {
    return refreshToken()
  } else {
    return false
  }
}

async function refreshToken() {
  TOKEN = await getSpotifyToken(CLIENT_ID, CLIENT_SECRET)
  prevTokenTimestamp = Date.now()
  console.log("Token Refreshed at", Date.now())
  return true
}



async function getSpotifyToken(id, secret) {
  return fetch("https://accounts.spotify.com/api/token", {
    method:"POST", 
    headers:{
      'Content-Type': 'application/x-www-form-urlencoded',
      'Authorization': 'Basic ' + Buffer.from(CLIENT_ID + ':' + CLIENT_SECRET).toString('base64')
    },
    body: encodeURIComponent("grant_type") + "=" + encodeURIComponent("client_credentials")
  })
    .then(res=>res.json())
}

async function init() {
  const token = await getSpotifyToken(CLIENT_ID, CLIENT_SECRET)
  console.log(token)
}

// init()

// const taylor = "06HL4z0CvFAxyc27GXpf02"
// fetch(`https://api.spotify.com/v1/artists/${taylor}`, {
//   method:"GET", 
//   headers:{
//     'Content-Type': 'application/json',
//     'Authorization': 'Bearer ' + TOKEN
//   }
// })
// .then(res=>res.json())
// .then(console.log)

// fetch(`https://api.spotify.com/v1/search/?q=test&type=track`, {
//   method:"GET", 
//   headers:{
//     'Content-Type': 'application/json',
//     'Authorization': 'Bearer ' + TOKEN
//   }
// })
// .then(res=>res.json())
// .then(data=>console.log(JSON.stringify(data)))

// const song="4IRpbTrTCHkP3aeRO48tZs"

// fetch(`https://api.spotify.com/v1/tracks/${song}`, {
//   method:"GET", 
//   headers:{
//     'Content-Type': 'application/json',
//     'Authorization': 'Bearer ' + TOKEN
//   }
// })
// .then(res=>res.json())
// .then(data=>console.log(JSON.stringify(data, null, 4)))


// fetch(`https://api.spotify.com/v1/audio-features/${song}`, {
//   method:"GET", 
//   headers:{
//     'Content-Type': 'application/json',
//     'Authorization': 'Bearer ' + TOKEN
//   }
// })
// .then(res=>res.json())
// .then(data=>console.log(JSON.stringify(data, null, 4)))

// init()

// var authOptions = {
//   url: 'https://accounts.spotify.com/api/token',
//   headers: {
//     'Authorization': 'Basic ' + Buffer.from(CLIENT_ID + ':' + CLIENT_SECRET).toString('base64')
//   },
//   form: {
//     grant_type: 'client_credentials'
//   },
//   json: true
// };

// request.post(authOptions, function(error, response, body) {
//   if (!error && response.statusCode === 200) {
//     var token = body.access_token;
//   }
// });

// fetch("https://api.spotify.com/v1/artists/1vCWHaC5f2uS3yhpwWbIA6/albums?album_type=SINGLE&offset=20&limit=10")
//   .then(res=>res.json())
//   .then(text=>console.log(text))