app.js

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

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 ExpressError = require("./utils/ExpressError.js");

const {isLoggedIn}=require("./middleware.js");
const {saveRedirectUrl}=require("./middleware.js");
const {isOwner,validateListing,validateReview,isReviewAuthor}=require("./middleware.js");

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");

// app.get("/demoUser",async(req,res) => {
//     let fakeUser = new User({
//         email: "student@gmail.com",
//         username: "delta-student",
//     })
//     let registeredUser = await User.register(fakeUser,"helloworld");
//     res.send(registeredUser);
// });

const listingRouter = require("./routes/listings.js");
const reviewRouter = require("./routes/review.js");
const userRouter = require("./routes/user.js");

// const MONGO_URL="mongodb://127.0.0.1:27017/wanderlust";
const dbUrl = process.env.ATLASDB_URL;

main()
.then(()=>{
    console.log("connected to DB.");
})
.catch((err)=>{
    console.log(err);
});

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

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

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

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

const sessionOptions={
    store,
    secret: process.env.SECRET,
    resave: false,
    saveUninitialized: true,
  };

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

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

// app.get("/testListing", async (req,res)=>{
//     let sampleListing = new Listing({
//         title:"My New Villa",
//         description: "By the beach",
//         price: 1200,
//         location: "Calangute, Goa",
//         country: "India",
//     });

//     await sampleListing.save();
//     console.log("sample was saved");
//     res.send("successful testing");
// });

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

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

app.listen(8080,()=>{
    console.log("server is listening to the port");
});