OmarElGabry / chat.io

'use strict';

var config 		= require('../config');

var passport 	= require('passport');

var logger 		= require('../logger');

var LocalStrategy 		= require('passport-local').Strategy;

var FacebookStrategy  	= require('passport-facebook').Strategy;

var TwitterStrategy  	= require('passport-twitter').Strategy;

var User = require('../models/user');

/**

 * Encapsulates all code for authentication 

 * Either by using username and password, or by using social accounts

 *

 */

var init = function(){

	// Serialize and Deserialize user instances to and from the session.

	passport.serializeUser(function(user, done) {

		done(null, user.id);

	});

	passport.deserializeUser(function(id, done) {

		User.findById(id, function (err, user) {

			done(err, user);

		});

	});

	// Plug-in Local Strategy

	passport.use(new LocalStrategy(

	  function(username, password, done) {

	    User.findOne({ username: new RegExp(username, 'i'), socialId: null }, function(err, user) {

	      if (err) { return done(err); }

	      if (!user) {

	        return done(null, false, { message: 'Incorrect username or password.' });

	      }

	      user.validatePassword(password, function(err, isMatch) {

	        	if (err) { return done(err); }

	        	if (!isMatch){

	        		return done(null, false, { message: 'Incorrect username or password.' });

	        	}

	        	return done(null, user);

	    });

	  }

	));

	// In case of Facebook, tokenA is the access token, while tokenB is the refersh token.

	// In case of Twitter, tokenA is the token, whilet tokenB is the tokenSecret.

	var verifySocialAccount = function(tokenA, tokenB, data, done) {

		User.findOrCreate(data, function (err, user) {

	      	if (err) { return done(err); }

			return done(err, user); 

		});

	};

	// Plug-in Facebook & Twitter Strategies

	passport.use(new FacebookStrategy(config.facebook, verifySocialAccount));

	passport.use(new TwitterStrategy(config.twitter, verifySocialAccount));

	return passport;

}

module.exports = init();