app.js

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


const express = require("express");
const app = express();
const mongoose = require("mongoose");
const methodOverride = require("method-override");
const ejsMate = require("ejs-mate");
const ExpressError = require("./utils/ExpressError.js");


const path = require("path");
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")

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,
  cookie:{
    expire: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()));

//to store login info for a session
passport.serializeUser(User.serializeUser());

//to remove login info for a session
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.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 });
});
app.listen(8080, () => {
  console.log("server is listening on port 8080");
});