Consistent user data returned from API

There's duplication in the user and session endpoints that
all return the same shaped user model data. The new helper should keep
them consistent when new properties need to be exposed.

server/controllers/session.controller.js

@@ -1,5 +1,7 @@
 import passport from 'passport';
 
+import { userResponse } from './user.controller';
+
 export function createSession(req, res, next) {
   passport.authenticate('local', (err, user) => { // eslint-disable-line consistent-return
     if (err) { return next(err); }
@@ -9,28 +11,14 @@ export function createSession(req, res, next) {
 
     req.logIn(user, (innerErr) => {
       if (innerErr) { return next(innerErr); }
-      return res.json({
-        email: req.user.email,
-        username: req.user.username,
-        preferences: req.user.preferences,
-        apiKeys: req.user.apiKeys,
-        verified: req.user.verified,
-        id: req.user._id
-      });
+      return res.json(userResponse(req.user));
     });
   })(req, res, next);
 }
 
 export function getSession(req, res) {
   if (req.user) {
-    return res.json({
-      email: req.user.email,
-      username: req.user.username,
-      preferences: req.user.preferences,
-      apiKeys: req.user.apiKeys,
-      verified: req.user.verified,
-      id: req.user._id
-    });
+    return res.json(userResponse(req.user));
   }
   return res.status(404).send({ message: 'Session does not exist' });
 }

server/controllers/user.controller.js

@@ -10,6 +10,17 @@ import {
 
 export * from './user.controller/apiKey';
 
+export function userResponse(user) {
+  return {
+    email: user.email,
+    username: user.username,
+    preferences: user.preferences,
+    apiKeys: user.apiKeys,
+    verified: user.verified,
+    id: user._id
+  };
+}
+
 const random = (done) => {
   crypto.randomBytes(20, (err, buf) => {
     const token = buf.toString('hex');
@@ -78,13 +89,7 @@ export function createUser(req, res, next) {
             });
 
             mail.send(mailOptions, (mailErr, result) => { // eslint-disable-line no-unused-vars
-              res.json({
-                email: req.user.email,
-                username: req.user.username,
-                preferences: req.user.preferences,
-                verified: req.user.verified,
-                id: req.user._id
-              });
+              res.json(userResponse(req.user));
             });
           });
         });
@@ -224,13 +229,7 @@ export function emailVerificationInitiate(req, res) {
             user.verifiedTokenExpires = EMAIL_VERIFY_TOKEN_EXPIRY_TIME; // 24 hours
             user.save();
 
-            res.json({
-              email: req.user.email,
-              username: req.user.username,
-              preferences: req.user.preferences,
-              verified: user.verified,
-              id: req.user._id
-            });
+            res.json(userResponse(req.user));
           }
         });
       });
@@ -269,12 +268,7 @@ export function updatePassword(req, res) {
     user.resetPasswordExpires = undefined;
 
     user.save((saveErr) => {
-      req.logIn(user, loginErr => res.json({
-        email: req.user.email,
-        username: req.user.username,
-        preferences: req.user.preferences,
-        id: req.user._id
-      }));
+      req.logIn(user, loginErr => res.json(userResponse(req.user)));
     });
   });
 
@@ -294,13 +288,7 @@ export function saveUser(res, user) {
       return;
     }
 
-    res.json({
-      email: user.email,
-      username: user.username,
-      preferences: user.preferences,
-      verified: user.verified,
-      id: user._id
-    });
+    res.json(userResponse(user));
   });
 }