app.js

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

const express = require('express');
const mongoose = require('mongoose');
const path = require('path');
const methodOverride = require('method-override');
const ejsMate = require('ejs-mate');
const session = require('express-session');
const flash = require('connect-flash');
const passport = require('passport');
const LocalStrategy = require('passport-local');
const MongoStore = require('connect-mongo')(session);

const ExpressError = require('./utils/ExpressError');
const User = require('./models/user');

const userRoutes = require('./routes/users');
const campgroundRoutes = require('./routes/campgrounds');
const reviewRoutes = require('./routes/reviews');

// const dbUrl = process.env.DB_URL
const dbUrl = process.env.DB_URL || 'mongodb://localhost:27017/yelp-camp';

mongoose.connect(dbUrl, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useUnifiedTopology: true,
    useFindAndModify: false
});
const db = mongoose.connection;
db.on("error", console.error.bind(console, "connection error: "));
db.once("open", () => {
    console.log("Database connected!");
});


const app = express();

app.engine('ejs', ejsMate);
app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));

app.use(express.urlencoded({ extended: true}));
app.use(methodOverride('_method'));
app.use(express.static(path.join(__dirname, 'public')));

const secret = process.env.SECRET || 'thisisasecret';
const store = new MongoStore({
    url: dbUrl,
    secret,
    touchAfter: 24 * 60 * 60
})

store.on("error", function (e){
    console.log("SESSION STORE ERROR", e)
});

const sessionConfig ={
    store,
    secret,
    resave: false,
    saveUninitialized: true,
    cookie: {
        httpOnly: true, // extra security (default thing these days)
        expires: Date.now() + 1000 * 60 * 60 * 24 *7, // this is one week duration
        maxAge: 1000 * 60 * 60 * 24 *7
    }
}
app.use(session(sessionConfig));
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) =>{
    console.log(req.session);
    res.locals.success = req.flash('success');
    res.locals.error = req.flash('error');
    res.locals.currentUser = req.user;
    next();
});

app.use('/', userRoutes);
app.use('/campgrounds', campgroundRoutes);
app.use('/campgrounds/:id/reviews', reviewRoutes);


app.get('/', (req,res) => {
    res.render('home');
});

app.all('*', (req, res, next) => {
    next( new ExpressError('Page Not Found', 404));
})

app.use((err, req, res, next) =>{
    const {statusCode = 500 } = err;
    if(!err.message) err.message='Oh No, Something went wrong';
    res.status(statusCode).render('error', { err }); //send to error page
});

const port = process.env.PORT || 3000;
app.listen(port, () => {
    console.log(`SERVER STARTED on port ${port}....`);
});