app.js

// CALLING ENVIRONMENTAL VARIABLE MODULE
require("dotenv").config();

// CALLING DEPENDECNIES IN PACKAGE.JSON
const 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"),
	MongoClient				= require("mongodb"),
	morgan						= require("morgan"),
	cors							= require("cors"),
	winston						= require("winston"),
	helmet						= require("helmet"),
	compression				= require("compression");
	Sentry 						= require("@sentry/node");
	Tracing 					= require("@sentry/tracing");

// CALLING ROUTES
const commentRoutes 		= require("./routes/comments"),
	reviewRoutes     			= require("./routes/reviews"),
	campgroundRoutes 			= require("./routes/campgrounds"),
	indexRoutes 					= require("./routes/index");


mongoose.set("useNewUrlParser", true);
mongoose.set("useFindAndModify", false);
mongoose.set("useCreateIndex", true);
mongoose.set("useUnifiedTopology", true);
// linking the database here with the one on Heroku
var url = process.env.DATABASEURL;
// Use the database below when in production
// "mongodb://localhost/temporary_database"
// checking DATABASEURL value
//console.log(process.env.DATABASEURL);
mongoose.connect(url, {
		useNewUrlParser: true,
		useCreateIndex: true
	}). then (() => {
		console.log("Conencted to DB");
	}). catch((err) => {
		console.log("ERROR:", err.message);
});

app.use(bodyParser.urlencoded({extended: true}));
app.use(express.static(__dirname + "/public")); // Using __dirname + is a better way to navigate to the file
app.set("view engine", "ejs");
app.use(methodOverride("_method"));
app.use(flash());

// Uncomment the code below for additional logging during development
//app.use(cors()); // CORS is a node.js package for providing a Connect/Express middleware that can be used to enable CORS with various options
//app.use(morgan("combined")); // HTTP request logger middleware for node.js. Use during development

// Helmet helps you secure your Express apps by setting various HTTP headers
app.use(
  helmet({
    contentSecurityPolicy: false,
  })
);

// CORS is a node.js package for providing a Connect/Express middleware that can be used to enable CORS with various options.
// const whitelist = ["https://goorm-ide-test-ngvdz.run-us-west2.goorm.io/", "https://aqueous-reaches-28926.herokuapp.com/", "http://goorm-ide-test-ngvdz.run-us-west2.goorm.io/"];
// const corsOptions = {
//   origin: function (origin, callback) {
//     if (whitelist.indexOf(origin) !== -1) {
//       callback(null, true);
//     } else {
//       callback(new Error("Not allowed by CORS"));
//     }
//   }
// }
// app.use(cors(corsOptions));

// compress all responses
app.use(compression());

// Moment JS for timestamps
app.locals.moment = require("moment");

// Passport Configuration
app.use(require("express-session")({
	secret: process.env.PASSPORT_SECRET,
	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());

// Middleware used below
app.use(function(req, res, next){
	res.locals.currentUser = req.user; // passing user into every single template
	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.use("/campgrounds/:id/reviews", reviewRoutes);

// Sentry Error Logging
Sentry.init({
  dsn: "https://0cd84944ffb44d55a8b354bda4bfa04e@o958423.ingest.sentry.io/6091936",

  // Set tracesSampleRate to 1.0 to capture 100%
  // of transactions for performance monitoring.
  // We recommend adjusting this value in production
  tracesSampleRate: 1.0,
});

const port = process.env.PORT || 3000;
app.listen(port, process.env.IP, function(){
	console.log("Server is on");
	console.log("Application is live at http://localhost:3000");
	});