index.js

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

const express = require("express");
const app = express();
const mongoose = require("mongoose");
const path = require("path");
const methodOverride = require("method-override");
const ejsMate = require("ejs-mate");
const wrapAsync = require("./utils/wrapAsync");
const ExpressError = require("./utils/ExpressError");
const listingRouter = require("./routes/listins");
const reviewRouter = require("./routes/review");
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 userRouter = require("./routes/user");
const MongoStore = require("connect-mongo");
const bookingRouter = require("./routes/booking");

const dbURL = process.env.ATLASDB_URL;

async function main() {
    try {
        await mongoose.connect(dbURL);
        console.log("Connected to db");
    } catch (err) {
        console.log("Error in connection", err);
    } 
}

main();

const store = MongoStore.create({
    mongoUrl: dbURL,
    crypto: {
        secret: process.env.SECRET,
    },
    touchAfter: 24 * 3600,
});

store.on("error", (err) => {
    console.log("Error in MongoSession Store", err);
});

const sessionOptions = {
    store,
    secret: process.env.SECRET,
    resave: false,
    saveUninitialized: true,
    cookie: {
        expires: Date.now() + 17 * 24 * 60 * 60 * 1000,
        maxAge: 17 * 24 * 60 * 60 * 1000,
        httpOnly: true,
    }
};

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(express.urlencoded({ extended: true }));
app.use(express.json()); // For Razorpay AJAX order creation
app.use(methodOverride("_method"));
app.use(express.static(path.join(__dirname, "/public")));
app.engine("ejs", ejsMate);
app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "views"));

// GLOBAL middleware
app.use((req, res, next) => {
    res.locals.success = req.flash("success");
    res.locals.error = req.flash("error");
    res.locals.currUser = req.user;
    next();
});

// ROUTES
app.use("/listings", listingRouter);
app.use("/listings/:id/reviews", reviewRouter);
app.use("/", bookingRouter);
app.use("/", userRouter);

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

// ERROR HANDLER
app.use((err, req, res, next) => {
    const { statusCode = 500 } = err;
    if (!err.message) err.message = "Something went wrong";
    res.status(statusCode).render("./listings/error.ejs", { err });
});

app.listen(3000, () => {
    console.log("Server is listening on port 3000");
});