server.js

'use strict';
require('dotenv').config();
const express     = require('express');
const bodyParser  = require('body-parser');
const cors        = require('cors');
const helmet = require('helmet');
const MongoClient = require('mongodb').MongoClient;
const mongo = new MongoClient(process.env.DB, { useNewUrlParser: true, useUnifiedTopology: true });

const apiRoutes         = require('./routes/api.js');
const fccTestingRoutes  = require('./routes/fcctesting.js');
const runner            = require('./test-runner');

const app = express();

app.use('/public', express.static(process.cwd() + '/public'));

app.use(cors({origin: '*'})); //For FCC testing purposes only

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(helmet());
app.use(helmet.xssFilter());
app.use(helmet.contentSecurityPolicy({
  directives: {
    scriptSrc: ["'self'"],
    styleSrc: ["'self'"]
  }
}));

mongo.connect((err, db) => {
  if (err) {
    console.log(err);
  } else{
    console.log('mongo connection successful');

    //Index page (static HTML)
    app.route('/')
      .get(function (req, res) {
        res.sendFile(process.cwd() + '/views/index.html');
      });

    //For FCC testing purposes
    fccTestingRoutes(app);

    //Routing for API 
    apiRoutes(app, db);  

    //404 Not Found Middleware
    app.use(function(req, res, next) {
      res.status(404)
        .type('text')
        .send('Not Found');
    });

    //Start our server and tests!
    const listener = app.listen(process.env.PORT || 3000, function () {
      console.log('Your app is listening on port ' + listener.address().port);
      if(process.env.NODE_ENV==='test') {
        console.log('Running Tests...');
        setTimeout(function () {
          try {
            runner.run();
          } catch(e) {
            console.log('Tests are not valid:');
            console.error(e);
          }
        }, 3500);
      }
    });
  } // mongo else - success
}); // closing mongo connection

module.exports = app; //for testing