app.js

if (process.env.NODE_ENV !== 'production') {
  require('dotenv').config();
}

const express = require('express');
const path = require('path');
const mongoose = require('mongoose');
const { RedisSessionStore: redisStore, redisClient } = require('./redis');
const engine = require('ejs-mate');
const methodOverride = require('method-override');
const session = require('express-session');
const flash = require('connect-flash');
const passport = require('passport');
const LocalStrategy = require('passport-local');
const User = require('./models/user');
const mongoSanitize = require('express-mongo-sanitize');
const helmet = require('helmet');
const cookieParser = require('cookie-parser');
const dbUrl = process.env.DB_URL || 'mongodb://localhost:27017/yelp-camp';
const secret = process.env.SECRET || 'thisshouldbeabettersecret!';
const port = process.env.PORT || 3000;
const campgroundRoutes = require('./routes/campgrounds');
const reviewRoutes = require('./routes/reviews');
const userRoutes = require('./routes/users');
const contactRoutes = require('./routes/contacts');
const {
  scriptSrcUrls,
  styleSrcUrls,
  connectSrcUrls,
  fontSrcUrls,
} = require('./allowedUrls');

mongoose.connect(dbUrl, {
  useNewUrlParser: true,
  useUnifiedTopology: true,
  useCreateIndex: true,
  useFindAndModify: false,
});

const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', () => console.log('Connected to Database'));

redisClient.on('error', (err) => console.log('Session store error: ', err));
redisClient.on('connect', () => console.log('Connected to Session Store'));

const app = express();

app.engine('ejs', engine);
app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));

app.use(express.static(path.join(__dirname, 'public')));
app.use(express.urlencoded({ extended: true }));
app.use(methodOverride('_method'));
app.use(mongoSanitize());
app.use(cookieParser(secret));

const sessionConfig = {
  name: 'session',
  secret,
  resave: true,
  rolling: true,
  saveUninitialized: false,
  cookie: { httpOnly: true, secure: false },
  store: new redisStore({ client: redisClient }),
};

if (app.get('env') === 'production') {
  app.set('trust proxy', 1);
  sessionConfig.cookie.secure = true;
  sessionConfig.proxy = true;
}

app.use(session(sessionConfig));
app.use(flash());
app.use(helmet());

app.use(
  helmet.contentSecurityPolicy({
    directives: {
      defaultSrc: [],
      connectSrc: ["'self'", ...connectSrcUrls],
      scriptSrc: ["'unsafe-inline'", "'self'", ...scriptSrcUrls],
      styleSrc: ["'self'", "'unsafe-inline'", ...styleSrcUrls],
      workerSrc: ["'self'", 'blob:'],
      childSrc: ['blob:'],
      objectSrc: [],
      imgSrc: [
        "'self'",
        'blob:',
        'data:',
        'https://res.cloudinary.com/bartoszt/',
        'https://images.unsplash.com/',
      ],
      fontSrc: ["'self'", ...fontSrcUrls],
    },
  })
);

app.use(passport.initialize());
app.use(passport.session());
passport.use(new LocalStrategy(User.authenticate()));
passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());

app.use((req, res, next) => {
  if (req.path !== '/login' && req.session.returnTo) {
    delete req.session.returnTo;
  }
  res.locals.currentUser = req.user;
  res.locals.success = req.flash('success');
  res.locals.error = req.flash('error');
  next();
});

app.use('/', userRoutes);
app.use('/campgrounds', campgroundRoutes);
app.use('/campgrounds/:id/reviews', reviewRoutes);
app.use('/contact', contactRoutes);

app.get('/', (req, res) => {
  res.render('home');
});

app.all('*', (req, res) => {
  res.status(404).render('notFound');
});

app.use((err, req, res, next) => {
  const { statusCode = 500 } = err;
  const redirectPath = err.redirectPath || 'back';

  if (!err.message) {
    err.message = 'Oh no! Something went wrong';
  }

  req.flash('error', err.message);
  res.status(statusCode).redirect(redirectPath);
});

app.listen(port, () => {
  console.log(`Serving on port ${port}`);
});