app.js

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

//requiring ROUTES
var commentRoutes       = require("./routes/comments"),
    campgroundRoutes    = require("./routes/campgrounds"),
    indexRoutes         = require("./routes/index")
  

mongoose.connect("mongodb://sakifKhan:<sakif1998>@cluster0-shard-00-00-5lx6k.mongodb.net:27017,cluster0-shard-00-01-5lx6k.mongodb.net:27017,cluster0-shard-00-02-5lx6k.mongodb.net:27017/test?ssl=true&replicaSet=Cluster0-shard-0&authSource=admin&retryWrites=true&w=majority", { useNewUrlParser: true, useUnifiedTopology: true });
app.use(bodyParser.urlencoded({extended: true}));
app.set("view engine", "ejs");
app.use(express.static("public"));
app.use(methodOverride("_method"));
app.use(flash());

//SEED the Database
// seedDB();

//PASSPORT CONFIGURATION
app.use(require("express-session")({
    secret: "Zabir the Lion King!",
    resave: false,
    saveUninitialized: false
}));
app.use(passport.initialize());
app.use(passport.session());
passport.use(new LocalStrategy(User.authenticate()));
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);

// app.listen(process.env.PORT, process.env.IP, function(){
//     console.log("The YelpCamp Server Has Started!");
//  });

app.listen(process.env.PORT || 3000, process.env.IP, (req, res) =>{ console.log('server listening')})