app.js

var express = require('express'),
    logger = require('morgan'),
    cookieParser = require('cookie-parser'),
    bodyParser = require('body-parser'),
    methodOverride = require('method-override'),
    session = require('express-session'),
    passport = require('passport'),
    LocalStrategy = require('passport-local'),
    TwitterStrategy = require('passport-twitter'),
    GoogleStrategy = require('passport-google'),
    FacebookStrategy = require('passport-facebook');

//We will be creating these two files shortly
//var config = require('./config.js'), //config file contains all tokens and other private info
funct = require('./functions.js'); //funct file contains our helper functions for our Passport and database work

var app = express();

//===============PASSPORT===============

//This section will contain our work with Passport
// Use the LocalStrategy within Passport to register/"signup" users.
passport.use('local-signup', new LocalStrategy(
  {passReqToCallback : true}, //allows us to pass back the request to the callback
  function(req, username, password, done) {
    funct.localReg(username, password)
    .then(function (user) {
      if (user) {
        console.log("REGISTERED: " + user.username);
        req.session.success = 'You are successfully registered and logged in ' + user.username + '!';
        done(null, user);
      }
      if (!user) {
        console.log("COULD NOT REGISTER");
        req.session.error = 'That username is already in use, please try a different one.'; //inform user could not log them in
        done(null, user);
      }
    })
    .fail(function (err){
      console.log(err.body);
    });
  }
));

//===============EXPRESS================
// Configure Express
app.use(logger('combined'));
app.use(cookieParser());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(methodOverride('X-HTTP-Method-Override'));
app.use(session({secret: 'supernova', saveUninitialized: true, resave: true}));
app.use(passport.initialize());
app.use(passport.session());
app.use(express.static(__dirname + '/static'))
app.set('views', __dirname + '/source/templates');
app.set('view engine', 'jade');

// Session-persisted message middleware
app.use(function(req, res, next){
  var err = req.session.error,
      msg = req.session.notice,
      success = req.session.success;

  delete req.session.error;
  delete req.session.success;
  delete req.session.notice;

  if (err) res.locals.error = err;
  if (msg) res.locals.notice = msg;
  if (success) res.locals.success = success;

  next();
});
//===============ROUTES===============

//displays our homepage
app.get('/', function(req, res){
  res.render('user_reg', {user: req.user});
});

//displays our signup page
app.get('/signin', function(req, res){
  res.render('signin');
});

//sends the request through our local signup strategy, and if successful takes user to homepage, otherwise returns then to signin page
app.post('/local-reg', passport.authenticate('local-signup', {
  successRedirect: '/',
  failureRedirect: '/signin'
  })
);

//sends the request through our local login/signin strategy, and if successful takes user to homepage, otherwise returns then to signin page
app.post('/login', passport.authenticate('local-signin', {
  successRedirect: '/',
  failureRedirect: '/signin'
  })
);

//logs user out of site, deleting them from the session, and returns to homepage
app.get('/logout', function(req, res){
  var name = req.user.username;
  console.log("LOGGIN OUT " + req.user.username)
  req.logout();
  res.redirect('/');
  req.session.notice = "You have successfully been logged out " + name + "!";
});
//===============PORT=================
var port = process.env.PORT || 5000; //select your port or let it pull from your .env file
app.listen(port);
console.log("listening on " + port + "!");