nokia-api-gateway/lib/routes/oauth-request.js

Gateway to Nokia API

const express = require('express')
const { CONSUMER_KEY, CONSUMER_SECRET } = require('../../constants/oauth-keys')
const { NOKIA_HEALTH_OAUTH, OAUTH_SIGNATURE_METHOD, OAUTH_VERSION } = require('../../constants/nokia-health-oauth')
const uuid = require('uuid')
const moment = require('moment')
const oauthSignature = require('oauth-signature')
const parseErrorInKeys = require('../parseErrorInKeys')

const router = express.Router()

const generateNonce = () => {
  const nonce = uuid.v4().split('-').join('')

  return nonce
}

const generateTimeStamp = () => {
  const unixtime = moment().unix()

  return unixtime
}

const generateSignature = (url, requestToken, requestTokenSecret, nonce, timestamp) => {
  const httpMethod = 'GET'
  const parameters = {
    oauth_consumer_key : CONSUMER_KEY,
    oauth_nonce : nonce,
    oauth_signature_method : OAUTH_SIGNATURE_METHOD,
    oauth_timestamp : timestamp,
    oauth_token : requestToken,
    oauth_version : OAUTH_VERSION,
  }
  const signature = oauthSignature.generate(httpMethod, url, parameters, CONSUMER_SECRET, requestTokenSecret)
  return signature
}

/* GET home page. */
router.get('/', function(req, res, next) {
  NOKIA_HEALTH_OAUTH.getOAuthRequestToken(function(error, requestToken, requestTokenSecret, results) {
    if(error) {
      return res.json({ success: false })
    }

    const resultsError = parseErrorInKeys(results)
    if (resultsError) {
      return res.json({ success: false, error: resultsError.message })
    }

    const url = 'https://developer.health.nokia.com/account/authorize'
    const nonce = generateNonce()
    const timestamp = generateTimeStamp()
    const signature = generateSignature(url, requestToken, requestTokenSecret, nonce, timestamp)
    const authUrl = `${url}?oauth_consumer_key=${CONSUMER_KEY}&oauth_nonce=${nonce}&oauth_signature=${signature}&oauth_signature_method=${OAUTH_SIGNATURE_METHOD}&oauth_timestamp=${timestamp}&oauth_token=${requestToken}&oauth_version=${OAUTH_VERSION}`
    res.json({
      success: true,
      requestToken,
      requestTokenSecret,
      authUrl,
    })
  })
})

module.exports = router