app.js

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 MongoStore = require('connect-mongo');


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


// Router
const listingRouter =require("./routers/listing.js");
const reviewRouter =require("./routers/review.js");
const userRouter =require("./routers/user.js");
const googleRouter = require("./routers/google.js");

// To connect env data base or require use process.env.(NAme)
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 session=require("express-session");

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

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

const sessionOptions = {
    store,
    secret: "mysupersecretstring",
    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());

// passport initalize
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("/about", (req, res) => {
    res.render("listings/about");
});
app.get("/price", (req, res) => {
    res.render("listings/price");
});


app.get("/contact", (req, res) => {
    res.render("listings/contact");
});

app.get("/privacy", (req, res) => {
    res.render("listings/privacy");
});

app.get("/terms", (req, res) => {
    res.render("listings/terms");
});

app.get("/", (req, res) => {
    res.redirect("/listings");
});

app.use("/auth/google", googleRouter)

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!"));
})

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

const port = process.env.PORT || 8080;

app.listen(port, () => {
    console.log(`server is working on ${port}`);
});