session.js

var session = require('express-session');
var credentials = require('./config/credentials')
var cookieParser = require('cookie-parser');
var mongoose = require('mongoose');
var bodyParser = require("body-parser");

var app = express();

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true })); 
app.set('view engine', 'ejs');
app.use(express.static(__dirname));

var sessionStore = null;
if (process.argv[2] === 'appbase'){
	console.log('using appbase.io as session store');
	var appbaseStore = require('connect-appbase')(session);
	sessionStore = new appbaseStore( { client: appbaseRef } );
}
else{
	console.log('using mongodb as session store');
	mongoose.connect(credentials.mongodb.url);
	var MongoStore = require('connect-mongo')(session);	
	sessionStore = new MongoStore({	mongooseConnection:  mongoose.connection });
}

app.use(session( {
	secret: 'appbaseoauth2', 
	store: sessionStore
}));
				
app.use(passport.initialize());
app.use(passport.session());