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


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



//Connecting to Database---
  const DbUrl=process.env.ATLASDB_URL;
  async function main(){
   await mongoose.connect(DbUrl);
  }
  main()
  .then((req,res)=>{
    console.log("Connected to DB");
  })
  .catch((err)=>{
    console.log(err);
  })
  


//Starting the server----
let port =8080;
app.listen(port,()=>{
    console.log("Server is listening on port 8080");
})

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

store.on("error",()=>{
  console.log(err)
})
const sessionOption={
  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,
  }
};


//using express-session and connect-flash---
app.use(session(sessionOption));
app.use(flash());

// using passport,passport-localStrategy,passport-local-mongoose---
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();
})



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



//ExpressError---
app.use((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.render("error.ejs",{err});
});