app.js

//IMPORT LIBRARIES and FRAMEWORKS
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 campgroundRoutes = require("./routes/campgrounds"),
    commentRoutes = require("./routes/comments"),
    indexRoutes = require("./routes/index");
    
// ENVIRONMENTAL VARIABLES
// Use the configured DATABASEURL variable if it exists; otherwise use the dev db as a backup
var url = process.env.DATABASEURL || "mongodb://localhost/yelp_camp";

// START CONNECTIONS
// ---- Use the local connection for development purposes and the mLab (or other) for production
mongoose.connect(url);
app.use(bodyParser.urlencoded({extended: true}));
app.set("view engine", "ejs"); // Start view engine
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: "Once again Rusty wins cutest dog!",
    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 to pass user info to all routes
app.use(function(req, res, next){
    res.locals.currentUser = req.user;
    res.locals.error = req.flash("error");
    res.locals.success = req.flash("success");
    next();
});

// Connect to Routes (shortcuts the route code)
app.use("/", indexRoutes);
app.use("/campgrounds/:id/comments", commentRoutes);
app.use("/campgrounds", campgroundRoutes);

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