app.js

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

const express = require('express');
const path = require('path');
const mongoose = require('mongoose');
const ejsMate = require('ejs-mate');
const session = require('express-session');
const MongoStore = require('connect-mongo');
const flash = require('connect-flash');
const ExpressError = require('./utils/ExpressError');
const methodOverride = require('method-override');
const passport = require('passport');
const LocalStrategy = require('passport-local');
const mongoSanitize = require('express-mongo-sanitize');
const helmet = require('helmet');
const User = require('./models/user');

const userRoutes = require('./routes/users');
const campgroundRoutes = require('./routes/campgrounds');
const reviewRoutes = require('./routes/reviews');
// dbURL = process.env.DB_URL || "mongodb://localhost:27017/yelp-camp";
dbURL = "mongodb://localhost:27017/yelp-camp";

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

const db = mongoose.connection;
db.on("error", console.error.bind(console, "connection error: "));
db.once("open", () => console.log("MongoDB connected!"));

const app = express();

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

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

const secret = process.env.SECRET || 'secretcode'

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

store.on('error', function (err) {
    console.log("SESSION STORE ERROR:", err)
})

const sessionConfig = {
    store,
    name: "session",
    secret,
    resave: false,
    saveUninitialized: true,
    cookie: {
        httpOnly: true,
        expires: Date.now() + 1000 * 60 * 60 * 24 * 7,
        maxAge: 1000 * 60 * 60 * 24 * 7
    }
}
app.use(session(sessionConfig));
app.use(flash());
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://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:"],
            childSrc: ["blob:"],
            objectSrc: [],
            imgSrc: [
                "'self'",
                "blob:",
                "data:",
                "https://res.cloudinary.com/dcf6kkgpj/",
                "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(function (req, res, next) {
    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.get("/", (req, res) => {
    res.render("home");
});

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

app.use((err, req, res, next) => {
    const { statusCode = 500 } = err;
    if (!err.message) err.message = 'Oh no, something went wrong!'
    res.status(statusCode).render("error", { err });
});

const port = process.env.PORT || 3000;
app.listen(port, () => {
    console.log("Activated Server on Port", port);
});