refactor code to es6

src/auth.middleware.js

@@ -1,25 +1,23 @@
-const admin = require.main.require('firebase-admin');
+import { log } from './util/logger';
 
-const logger = require('./util/logger');
+const admin = require.main.require('firebase-admin');
 
-function firebaseAuthMiddleware(req, res, next) {
+export default function firebaseAuthMiddleware(req, res, next) {
     const authorization = req.header('Authorization');
     if (authorization) {
         let token = authorization.split(' ');
         admin.auth().verifyIdToken(token[1])
         .then((decodedToken) => {
-            logger.log(decodedToken);
+            log(decodedToken);
             res.locals.user = decodedToken;
             next();
         })
         .catch(err => {
-            logger.log(err);
+            log(err);
             res.sendStatus(401);
         });
     } else {
-        logger.log('Authorization header is not found');
+        log('Authorization header is not found');
         res.sendStatus(401);
     }
 }
-
-module.exports = firebaseAuthMiddleware;

src/index.js

@@ -1,5 +1,5 @@
-const auth = require('./auth.middleware');
+import auth from './auth.middleware';
 
-module.exports = {
+export {
     auth
-};
+}

src/util/logger.js

@@ -1,11 +1,7 @@
 const debug = (process.env.APP_DEBUG === 'true');
 
-function log() {
+export function log() {
     if (!debug) return;
 
     console.log(...arguments);
 }
-
-module.exports = {
-    log
-};