//dependencies for each module used

var express = require('express');

var http = require('http');

var path = require('path');

var handlebars = require('express3-handlebars');

var app = express();

//load environment variables

var dotenv = require('dotenv');

dotenv.load();

//load tumblr

var tumblr = require('tumblr');

//have two blank strings for access token and access secret

var accessToken = "";

var accessSecret = "";

var oauth = {

consumer_key: process.env.TUMBLR_CONSUMER_KEY,

consumer_secret: process.env.TUMBLR_CONSUMER_SECRET,

token: accessToken,

token_secret: accessSecret

};

//set up Oauthrequirements

var passport = require('passport'),

util = require('util'),

passportTumblrStrategy = require('passport-tumblr').Strategy;

//Set up passport session set up.

//This allows persistant login sessions so the user doesn't need to keep logging in everytime

//for their access token

passport.serializeUser(function(user, done) {

done(null, user);

});

passport.deserializeUser(function(obj, done) {

done(null, obj);

});

// Simple route middleware to ensure user is authenticated.

function ensureAuthenticated(req, res, next) {

if (req.isAuthenticated()) { return next(); }

res.redirect('/');

}

//Use TumblrStrategy with passport

passport.use(new passportTumblrStrategy({

consumerKey: process.env.TUMBLR_CONSUMER_KEY,

consumerSecret: process.env.TUMBLR_CONSUMER_SECRET,

callbackURL: "http://127.0.0.1:3000/auth/callback"

}, function (token, tokenSecret, profile, done) {

accessToken = token;

accessSecret = tokenSecret;

oauth.token = token;

oauth.token_secret = tokenSecret;

process.nextTick(function() {

return done(null, profile);

});

}));

//Configures the Template engine

app.engine('handlebars', handlebars());

app.set('view engine', 'handlebars');

app.set('views', __dirname + '/views');

app.use(express.static(path.join(__dirname, 'public')));

app.use(express.bodyParser());

//more setting up configuration for express

//Allows cookie access and interaction

app.use(express.cookieParser() );

app.use(express.session({ secret: 'nyan cat'}));

//Intialize passport

app.use(passport.initialize());

app.use(passport.session());

app.use(app.router);

//routes

app.get('/', function(req, res) {

res.render('index');

});

app.get('/auth', passport.authenticate('tumblr'), function(req, res) {

//Nothing should be here since request redirects to '/' after callback is done

});

//we need to set up a callback route too

app.get('/auth/callback',

passport.authenticate('tumblr', { failureRedirect: '/' }),

function(req, res) {

res.redirect('/home');

});

app.get('/home', ensureAuthenticated, function(req, res) {

res.render('home');

});

//this route will display all the data

app.get('/home/default', ensureAuthenticated, function(req, res) {

//setup a new tumblr user with authentication

var user = new tumblr.User(oauth);

user.dashboard(function(err, response) {

var data = [];

console.log(response);

//because this is syncrhonous, we have to do a for loop recursively and render only when it's done

function saveData(i) {

if (i < response.posts.length) {

var temp = {};

temp.name = response.posts[i].short_url;

temp.posts = response.posts[i].note_count;

data.push(temp);

saveData(i+1);

}

}

saveData(0);

res.json(data);

});

});

//set environment ports and start application

app.set('port', process.env.PORT || 3000);

http.createServer(app).listen(app.get('port'), function(){

console.log('Express server listening on port ' + app.get('port'));

});