app.js

require('dotenv').config()
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"),
    Review         = require("./models/review"),
    seedDB         = require("./seeds")

var campgroundRoutes = require("./routes/campgrounds"),
    commentRoutes    = require("./routes/comments"),
    authRoutes       = require("./routes/auth"),
    reviewRoutes     = require("./routes/reviews") 
    //mongoose.connect("mongodb+srv://pragee123:curvydock20@cluster0.cgexn.mongodb.net/yelp_camp?retryWrites=true&w=majority")
    // mongoose.connect("mongodb://localhost:27017/yelp_camp")
    mongoose.connect(process.env.DATABASEURL, {
      useNewUrlParser: true,
      useUnifiedTopology: true
    })
    .then(() => console.log('Connected to DB!'))
    .catch(error => console.log(error.message));
   
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

app.use(bodyParser.urlencoded({extended: true}));
app.use(express.static(__dirname + "/public"));
app.set("view engine", "ejs");
//   seedDB();
app.use(methodOverride("_method"));
app.use(flash());

app.locals.moment=require("moment");
//AUTH CONFIG
app.use(require("express-session")({
    secret:"He he he",
    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("/campgrounds",campgroundRoutes);
app.use("/campgrounds/:slug/comments",commentRoutes);
app.use(authRoutes);
app.use("/campgrounds/:slug/reviews",reviewRoutes);

app.listen(process.env.PORT||3000, process.env.IP, function(){
   console.log("The YelpCamp Server Has Started!");
});