index.js

const express = require('express');
const oura = require('oura');
const moment = require('moment');
const url = require('url');
const cors = require('cors');

require('dotenv').config();

const serverUrl =
  process.env.PROD_SERVER_URL || 'https://aa66-213-152-241-52.ngrok-free.app';

const ouraConfig = {
  clientId: process.env.OURA_CLIENT_ID,
  clientSecret: process.env.OURA_CLIENT_SECRET,
  // redirectUri: `${serverUrl}/redirect`,
  redirectUri: process.env.WEB_APP_REDIRECT_URL,
};

const dateFormat = 'YYYY-MM-DD';
let startLastWeek = moment().subtract(7, 'days').format(dateFormat);
let endNow = moment().format(dateFormat);

const redirect = url.parse(ouraConfig.redirectUri);
const app = express();
app.use(cors());

const port = process.env.PORT || 8000;
const host = redirect.host;
const proto = redirect.protocol;

// server paths
const promptOuraAuthAddress = proto + '//' + host + '/promptOuraAuth';
const oneWeekReadinessDataPath =
  '/getReadinessData/' + startLastWeek + '/' + endNow;

app.get('/', (req, res) => {
  res.send('<a href="' + promptOuraAuthAddress + '">kick off auth</a>');
});

const server = app.listen(port, () => {
  console.log(`Example app listening on port ${port}`);
  console.log(
    `oura callback url to make sure is on the allowlist: ${ouraConfig.redirectUri}`
  );
});

// save auth qr requests
const authRequests = new Map();

const authClient = oura.Auth(ouraConfig);

// prompt to begin oura authorization flow
app.get(url.parse(promptOuraAuthAddress).pathname, (req, res) => {
  const state = req.query.userAddress || '69';
  const authUri = authClient.token.getUri({ state });
  return res
    .status(200)
    .set('Content-Type', 'application/json')
    .send({ authUri });
});

// auth redirect from oura api
app.get(redirect.pathname, (req, res) => {
  const userAddress = req.query.state || 'ERROR';
  console.log(userAddress);
  return authClient.code
    .getToken(req.originalUrl)
    .then((auth) => {
      return auth.refresh().then(function (refreshed) {
        const authConfig = refreshed.data;
        // store user authConfig
        authRequests.set(userAddress, authConfig);
      });
    })
    .then(function () {
      res.send(
        'Logged into oura. Get <a href="' +
          `${oneWeekReadinessDataPath}?state=${userAddress}` +
          '">last week\'s readiness data</a>'
      );
    })
    .catch(function () {
      res.send('Error: oura auth failed');
    });
});

// get readiness from any start to end dates
app.get('/getReadinessData/:start/:end', (req, res) => {
  const state = req.query.state;
  const token = req.query.access_token;
  const client = new oura.Client(token);
  client
    .dailyReadiness(req.params.start, req.params.end)
    .then(function (user) {
      // res.json(JSON.stringify(user, null, 1));
      return res
        .status(200)
        .set('Content-Type', 'application/json')
        .send(JSON.stringify(user, null, 1));
    })
    .catch(function (error) {
      console.error(error);
    });
});