app.js

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

const express  = require("express");
const app = express();
const port = 8080;
const mongoose = require("mongoose");

const dbUrl = process.env.ATLASDB_URL;

const ExpressError = require("./utils/ExpressError");
const session = require("express-session");
const MongoStore = require('connect-mongo')

const flash = require("connect-flash");
const passport = require("passport");
const LocalStrategy = require("passport-local");
const User = require("./models/user.js");

const listingRouter = require("./routes/listing.js");
const reviewRouter = require("./routes/reviews.js");
const userRouter = require("./routes/user.js");

const methodOverride = require("method-override");
app.use(methodOverride("_method"));

app.set("view engine","ejs");

const ejsMate = require("ejs-mate"); 
app.engine("ejs",ejsMate);

const path = require("path");
app.use(express.static(path.join(__dirname,"/public")));
app.set("views",path.join(__dirname,"/views"));
app.use(express.urlencoded({extended:true}));

main()
.then(()=>{
    console.log("Connection success");
})
.catch((err)=>{
    console.log("error : ",err);
})

async function main(){
    await mongoose.connect(dbUrl);
}

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

store.on("error",(err)=>{
    console.log("ERROR in MONGO SESSION STORE",err);
})

const sessionOptions = {
    store,
    secret : process.env.SECRET,
    resave : false,
    saveUninitialized : true,
    cookie:{
        expires : Date.now() + 7*24*60*60*1000,
        maxAge : 7*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((req,res,next)=>{
    res.locals.success = req.flash("success");
    res.locals.error = req.flash("error");
    res.locals.currUser = req.user;
    next();
})

// app.get("/",(req,res)=>{
//     res.send("working");
// })

app.use("/listings",listingRouter);

app.use("/listings/:id/reviews",reviewRouter);

app.use("/",userRouter);

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

// Error handler
app.use((err,req,res,next)=>{
    let{statusCode=500 , message = "something went wrong"} = err;
    res.status(statusCode).render("error.ejs",{message});
})

app.listen(port,(req,res)=>{
    console.log(`app is listening on port ${port}`);
})