FCC Advanced Node and Express Socket.IO Checkpoint 1

server.js

'use strict';

const express     = require('express');
const session     = require('express-session');
const bodyParser  = require('body-parser');
const fccTesting  = require('./freeCodeCamp/fcctesting.js');
const auth        = require('./app/auth.js');
const routes      = require('./app/routes.js');
const mongo       = require('mongodb').MongoClient;
const cookieParser= require('cookie-parser')
const passport    = require('passport');
const sessionStore= new session.MemoryStore();
const app         = express();
const http        = require('http').Server(app);
const io          = require('socket.io')(http);
const passportSocketIo = require("passport.socketio");


fccTesting(app); //For FCC testing purposes

app.use('/public', express.static(process.cwd() + '/public'));
app.use(cookieParser());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.set('view engine', 'pug')

app.use(session({
  secret: process.env.SESSION_SECRET,
  resave: true,
  saveUninitialized: true,
  key: 'express.sid',
  store: sessionStore,
}));


mongo.connect(process.env.DATABASE, (err, db) => {
    if(err) console.log('Database error: ' + err);
  
    auth(app, db);
    routes(app, db);
      
    http.listen(process.env.PORT || 3000);
  
  
    //start socket.io code
  
    io.use(passportSocketIo.authorize({
      cookieParser: cookieParser,
      key:          'express.sid',
      secret:       process.env.SESSION_SECRET,
      store:        sessionStore
    }));
  
    var currentUsers = 0;  
    
    io.on('connection', socket => {
      
      ++currentUsers;
      console.log('user ' + socket.request.user.name + ' connected');
      io.emit('user count', currentUsers);

      socket.on('disconnect', () => {
        --currentUsers;
        io.emit('user count', currentUsers);
      });

    });
  
    //end socket.io code

});

My Solution for this (works for now)
Require passport.socketio in server.js:

let passportSocketIo = require('passport.socketio')

Call the authorize() method on this, giving the options below and mount it using io.use() for all packets.

io.use(passportSocketIo.authorize({
  cookieParser: cookieParser,
  key:          'express.sid',
  secret:       process.env.SESSION_SECRET,
  store:        sessionStore
}));