server.js

if (process.NODE_ENV != "production" ){
    require("dotenv").config();
}
// requiring express and create an express application
const express = require('express')
const app = express();

//requiring connect-flash module
const flash = require('connect-flash');

// const dotenv=require('dotenv');
const path=require('path');

//requiring bcryptjs 
const bcrypt=require("bcryptjs");

//requiring express-session
const sessions=require("express-session");



// dotenv.config();
const { db_handler } = require('./config/config');

const { router } = require("./Routes/index");


// Set up middlewars 
app.use(express.urlencoded({ extended: true }));
app.use(express.json());
app.set('view engine','ejs');
app.set('views', path.join(__dirname,'Views'));
app.use(express.static('public'));





// Importing mongo-store module
const mongostore = require("connect-mongo");


//Connecting to MySQL DB:
db_handler.connect((err) => {
    if (err){
        console.log("Ouups, cannot get connection to MySQL server! " + err.message);
    }
        
    else
        console.log("Successfully connected  to MySQL server");
});

/** SETUP OUR SESSIONS */
// console.log("mongo URL:",String(process.env.MONGO_ATLAS_SESSION_STORE_URL));
const sessionOption = {
    name: String(process.env.SESSION_NAME),
    secret: String(process.env.SESSION_SECRET),
    resave: false,
    saveUninitialized: false,
    store:  mongostore.create({
        mongoUrl:String(process.env.MONGO_ATLAS_SESSION_STORE_URL),
        touchAfter:5 * 24 * 60 * 60
    }),
    cookie: {
        maxAge: 5 * 24 * 60 * 60 * 1000, //  max_age = 5 days
        httpOnly:true,
    }
}

app.use(sessions(sessionOption));

app.use(flash());

// overide res.locals object in order to get flash messages 
// middlware for flash messages in  every http request
app.use((req, res, next) => {
    res.locals.success = req.flash("success");
    res.locals.danger = req.flash("danger");
    res.locals.active_user_email = req.session.active_user_email;
    res.locals.active_user_id = req.session.active_user_id;
    res.locals.active_user_nickname=req.session.active_user_nickname;

    // console.log("success >>",res.locals.success);
    // console.log("danger >>",res.locals.danger);

    // console.log("session >>>",req.session);
    // console.log("user_email >>",res.locals.active_user_email);
    // console.log("user_id  >>",res.locals.active_user_id);
    next()
})


//routes handler
app.use(router);



// launch application on port 3000
const port= process.env.PORT || 3000;
app.listen(port, () => {
    console.log("app runs on [port:",port,"]");
})