app.js

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

mongoose.connect(process.env.DATABASEURL);
// THIS IS THE DEV DATABASE  ==>  mongoose.connect("mongodb://localhost/yelp_camp");
// THIS IS THE PROD DATABASE ==>  mongoose.connect("mongodb://matt:ellie@ds013574.mlab.com:13574/yelpcamp");
// BOTH ARE TAKEN CARE OF WITH 'DATABASEURL' BECAUSE THIS IS AN *ENVIRONMENT VARIABLE*
app.use(bodyParser.urlencoded({extended: true}));
app.set("view engine", "ejs");
app.use(express.static(__dirname + "/public"));
app.use(methodOverride("_method"));
app.use(flash());
// seedDB(); //seed the database

// PASSPORT CONFIGURATION
app.use(require("express-session")({
    secret: "I think that understanding authentication will really help me win some job positions!",
    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());

// Pass user name info to every page
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!!");
});