promisify server code (node 7.6)

data/auth/actions.js

@@ -1,5 +1,6 @@
 import execXhr from '../../util/xhr';
 import { checkSecret } from '../../util/authSecret';
+import promisify from '../../universal/promisify';
 
 /* eslint-disable */
 const Auth0Lock = process.browser && require('auth0-lock').default;
@@ -24,10 +25,9 @@ async function getTokenAndState() {
   };
 }
 
+const doGetProfile = promisify(lock, 'getProfile');
 async function getProfile(authToken) {
-  const profile = await new Promise((resolve, reject) => {
-    lock.getProfile(authToken, (err, res) => (err ? reject(err) : resolve(res)));
-  });
+  const profile = await doGetProfile(authToken);
   return {
     type: 'GET_PROFILE',
     profile,

package.json

@@ -4,6 +4,9 @@
   "author": "Sebastien Dubois",
   "license": "GPL-3.0",
   "main": "./server",
+  "engines" : {
+    "node" : ">=7.6.0"
+  },
   "scripts": {
     "postinstall": "sh scripts/createDefaultConfig.sh",
     "dev": "nodemon -w server -w universal -w yarn.lock -w next.config.js -w package.json",

server/index.js

@@ -4,12 +4,13 @@ const next = require('next');
 const cache = require('./cache');
 const { configSession, defaultSessionData } = require('./session');
 const authApi = require('./authApi');
+const promisify = require('../universal/promisify');
 
 const dev = process.env.NODE_ENV !== 'production';
 const app = next({ dev });
 const handle = app.getRequestHandler();
 
-app.prepare().then(() => {
+return app.prepare().then(async () => {
   const server = express();
 
   server.use(bodyParser.json());
@@ -19,11 +20,8 @@ app.prepare().then(() => {
   server.use('/api/auth', authApi);
   server.use(cache(app));
   server.use((req, res) => handle(req, res));
-
-  server.listen(3000, (err) => {
-    if (err) {
-      throw err;
-    }
-    console.log('> Ready on http://localhost:3000'); // eslint-disable-line no-console
-  });
+  const port = 3000;
+  await promisify(server, 'listen')(port);
+  console.log(`> Ready on http://localhost:${port}`); // eslint-disable-line no-console
+  return server;
 });

universal/promisify.js

@@ -0,0 +1,5 @@
+module.exports = function promisify(obj, method) {
+  return (...args) => new Promise((resolve, reject) => {
+    obj[method](...args, (err, res) => (err ? reject(err) : resolve(res)));
+  });
+};