app.js

require("dotenv").config();
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var flash = require('connect-flash');
const configDB = require('./config/database');
var passport = require('passport');
var LocalStrategy = require('passport-local');
var methodOverride = require('method-override');
var Campground = require('./models/campground');
var Comment = require('./models/comment');
var User = require('./models/user');
var seedDB = require("./seeds");

var commentRoutes = require('./routes/comments');
var campgroundRoutes = require('./routes/campgrounds');
var indexRoutes = require('./routes/index');

// seedDB(); //seed the database

mongoose.connect(configDB.url, {
    useNewUrlParser: true,
    useUnifiedTopology: true
});

app.set('view engine', 'ejs');

app.use(bodyParser.urlencoded({extended: true}));
app.use(express.static(__dirname + "/public"));
app.use(methodOverride("_method"));
app.use(flash());

//PASSPORT CONFIGURATION
app.use(require('express-session')({
    secret: process.env.SESSION_SECRET,
    resave: false,
    saveUninitialized: false
}));
app.use(passport.initialize());
app.use(passport.session());
passport.use(new LocalStrategy(User.authenticate())); // Comes with passport local mongoose
passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());

app.use(function(req, res, next){
    res.locals.currentUser = req.user;
    res.locals.error = req.flash("error");
    res.locals.success = req.flash("success");
    next();
});

app.use(indexRoutes);
app.use('/campgrounds', campgroundRoutes);
app.use('/campgrounds/:id/comments', commentRoutes);

let port = process.env.PORT;
if (port == null || port == "") {
  port = 3000;
}

app.listen(port, function(){
    console.log("Server started");
});