app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var mongoose = require('mongoose');
const bodyParser = require('body-parser');
const expressValidator = require('express-validator');
const flash = require('connect-flash');
const session = require('express-session');
const passport = require('passport');
const config = require('./config/database');

// Route Files
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var secureRouter = require('./routes/secure');

mongoose.connect(config.database, { useNewUrlParser: true });
let db = mongoose.connection;

// Check connection
db.once('open', function () {
  console.log('Connected to MongoDB');
});

// Check for DB errors
db.on('error', function (err) {
  console.log(err);
});

// Init App
var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

app.use(logger('dev'));
app.use(express.json());
// Body Parser Middleware
// parse application/x-www-form-urlencoded
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
// Set Public Folder
app.use(express.static(path.join(__dirname, 'public')));

// Express Session Middleware
app.use(session({
  secret: 'keyboard cat',
  resave: true,
  saveUninitialized: true
}));

// Express Messages Middleware
app.use(require('connect-flash')());
app.use(function (req, res, next) {
  res.locals.messages = require('express-messages')(req, res);
  next();
});

// Express Validator Middleware
app.use(expressValidator({
  errorFormatter: function (param, msg, value) {
    var namespace = param.split('.')
      , root = namespace.shift()
      , formParam = root;

    while (namespace.length) {
      formParam += '[' + namespace.shift() + ']';
    }
    return {
      param: formParam,
      msg: msg,
      value: value
    };
  }
}));

// Passport Config
require('./config/passport')(passport);
// Passport Middleware
app.use(passport.initialize());
app.use(passport.session());

app.get('*', function (req, res, next) {
  res.locals.user = req.user || null;
  next();
});

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/secure', secureRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;