app.js

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

const express = require('express');
const app = express();
const path = require('path');
const mongoose = require('mongoose');
const ejsMate = require('ejs-mate');
const session = require('express-session');
const flash = require('connect-flash');
const ExpressError = require('./utilities/ExpressError');
const methodOverride = require('method-override');
const campgroundRoutes = require('./routes/campgrounds');
const reviewRoutes = require('./routes/reviews');
const passport = require('passport');
const LocalStrategy = require('passport-local');
const User = require('./models/user');
const userRoutes = require('./routes/users');
const mongoSanitize = require('express-mongo-sanitize');
const helmet = require('helmet');
const MongoStore = require('connect-mongo');
const dbUrl = process.env.DB_URL || 'mongodb://localhost:27017/campingApp'
const secret = process.env.SECRET || 'thisisasparesecret'

mongoose.connect(dbUrl, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useUnifiedTopology: true,
    useFindAndModify: false
})
//Test connection
const db = mongoose.connection;
db.on("error", console.error.bind(console, "connection error"));
db.once("open", () => {
    console.log("Database connected")
})

app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));
app.engine('ejs', ejsMate);
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.urlencoded({ extended: true }));
app.use(express.json());
app.use(
    mongoSanitize({
      replaceWith: '_',
    }),
  );
app.use(methodOverride('_method'));
app.use(helmet());

const scriptSrcUrls = [
    "https://stackpath.bootstrapcdn.com/",
    "https://api.tiles.mapbox.com/",
    "https://api.mapbox.com/",
    "https://kit.fontawesome.com/",
    "https://cdnjs.cloudflare.com/",
    "https://cdn.jsdelivr.net",
];
const styleSrcUrls = [
    "https://kit-free.fontawesome.com/",
    "https://stackpath.bootstrapcdn.com/",
    "https://api.mapbox.com/",
    "https://api.tiles.mapbox.com/",
    "https://fonts.googleapis.com/",
    "https://use.fontawesome.com/",
    "https://cdn.jsdelivr.net",
];
const connectSrcUrls = [
    "https://api.mapbox.com/",
    "https://a.tiles.mapbox.com/",
    "https://b.tiles.mapbox.com/",
    "https://events.mapbox.com/",
];
const fontSrcUrls = [];
app.use(
    helmet.contentSecurityPolicy({
        directives: {
            defaultSrc: [],
            connectSrc: ["'self'", ...connectSrcUrls],
            scriptSrc: ["'unsafe-inline'", "'self'", ...scriptSrcUrls],
            styleSrc: ["'self'", "'unsafe-inline'", ...styleSrcUrls],
            workerSrc: ["'self'", "blob:"],
            objectSrc: [],
            imgSrc: [
                "'self'",
                "blob:",
                "data:",
                "https://res.cloudinary.com/jamestan/", //SHOULD MATCH YOUR CLOUDINARY ACCOUNT! 
                "https://images.unsplash.com/",
            ],
            fontSrc: ["'self'", ...fontSrcUrls],
        },
    })
);

const store = MongoStore.create({
    mongoUrl: dbUrl,
    touchAfter: 24*60*60,
    crypto: {
        secret
    }
});

const sessionOptions = {
    store,
    name: 'in_mkto',    // set random name for sessionID
    secret,
    resave: false,
    saveUninitialized: true,
    cookie: {
        httpOnly: true,
        // secure: true,    // this should only turn on when we use HTTPS
        expires: Date.now() + 1000 * 60 * 60 * 24 * 7,
        maxAge: 1000 * 60 * 60 * 24 * 7
    }
}
app.use(session(sessionOptions));
app.use(flash());
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) => {
    //these variables can be used in any ejs file
    //this conditional help redirect back to the route after logged in
    if (!['/user/login', '/'].includes(req.originalUrl)) {
        req.session.returnTo = req.originalUrl;
    }
    res.locals.currentUser = req.user;
    res.locals.success = req.flash('success');
    res.locals.error = req.flash('error');
    next();
})


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

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

app.all('*', (req, res, next) => {
    next(new ExpressError('Page not found!', 404))
})

app.use((err, req, res, next) => {
    const { status = 500 } = err;
    if (!err.message) err.message = "Something went wrong!";
    res.status(status).render('error', { err })
})

const port = process.env.PORT || 3000;
app.listen(port, () => {
    console.log(`APP IS LISTENING ON PORT ${port}...`)
})