register for Push tutorial

register.js

const testData = {
  title: "Testing",
  body: "It's a success!",
  icon: "/path/to/an/icon.png"
}

let subscription
let pushIntervalID

router.post("/register", (req, res, next) => {
  subscription = req.body
  console.log(subscription)
  res.sendStatus(201)
  pushIntervalID = setInterval(() => {
    // sendNotification can only take a string as it's second parameter
    webpush.sendNotification(subscription, JSON.stringify(testData))
      .catch(() => clearInterval(pushIntervalID))
  }, 30000)
})

router.delete("/unregister", (req, res, next) => {
  subscription = null
  clearInterval(pushIntervalID)
  res.sendStatus(200)
})