Using passport-facebook without Mongoose User (No Mongo in the MEAN stack) - angularjs

Question

I'm very new to the MEAN stack, and this might seem to be very naive or wrong approach, but I want to ask that when we authenticate using passport-facebook strategy, using the following code:
var FacebookStrategy = require('passport-facebook').Strategy;
var User = require('../models/user');
var fbConfig = require('../fb.js');
module.exports = function(passport) {
passport.use('facebook', new FacebookStrategy({
clientID : fbConfig.appID,
clientSecret : fbConfig.appSecret,
callbackURL : fbConfig.callbackUrl
},
// facebook will send back the tokens and profile
function(access_token, refresh_token, profile, done) {
console.log('profile', profile);
// asynchronous
process.nextTick(function() {
// find the user in the database based on their facebook id
User.findOne({ 'id' : profile.id }, function(err, user) {
// if there is an error, stop everything and return that
// ie an error connecting to the database
if (err)
return done(err);
// if the user is found, then log them in
if (user) {
return done(null, user); // user found, return that user
} else {
// if there is no user found with that facebook id, create them
var newUser = new User();
// set all of the facebook information in our user model
newUser.fb.id = profile.id; // set the users facebook id
newUser.fb.access_token = access_token; // we will save the token that facebook provides to the user
newUser.fb.firstName = profile.name.givenName;
newUser.fb.lastName = profile.name.familyName; // look at the passport user profile to see how names are returned
//newUser.fb.email = profile.emails[0].value; // facebook can return multiple emails so we'll take the first
// save our user to the database
newUser.save(function(err) {
if (err)
throw err;
// if successful, return the new user
return done(null, newUser);
});
}
});
});
}));
};
I don't need to store the user information in any data store. I want to store the token only for the time the user is logged into my web application, basically I don't have the need to use Mongo, because all the data that will be displayed in the web application will come from Facebook api, for example the posts for a profile, the number of likes on a particular posts etc. I don't need to have a backend as such, because if I store the data in any data store such as Mongo, the next time the user login then the data will be stale (in a way the Facebook api is kind of my backend), and I also want that the updates for information on any posts done on Facebook should be updated realtime on my web application for e.g. if someone likes a post on the actual Facebook page the number of likes on my web application should also be updated in realtime, so it seems unnecessary to first bring the data from the Facebook SDK and then store it in Mongo, why not just give it to the controller and from there the view can present the data. If my approach is wrong please do correct me.
So basically every time the user logs in an access token is created and used for that session, when the user logs out the access token is destroyed and so completely eliminates the need for storing the token and any data that is brought in using the Facebook SDK.

Answer 1

Replace the function call
User.findOne({ 'id' : profile.id }, function(err, user) {
With facebook sdk authentication call and return the user object when it's validated.
return done(null, user);
Please refer...
https://github.com/jaredhanson/passport-facebook

Answer 2

you need to create a new user template in the model folder. I have created the following: user.js
var facebook = module.exports.facebook = {
id : String,
token : String,
email : String,
name : String
}
and then change the passport.serializeUser and passport.deserializeUser functions.
passport.serializeUser(function(user, done) {
done(null, user.facebook.id);
});
// used to deserialize the user
//passport.deserializeUser(function(id, done) {
passport.deserializeUser(function(id, done) {
done(null, { id: User.facebook.id, token: User.facebook.token, name: User.facebook.name, email: User.facebook.email})
});
then the function: process.nextTick(function() {} replace the content by this code :
var newUser = User;
// set all of the facebook information in our user model
newUser.facebook.id = profile.id; // set the users facebook id
newUser.facebook.token = token; // we will save the token that facebook provides to the user
newUser.facebook.name = profile.name.givenName + ' ' + profile.name.familyName; // look at the passport user profile to see how names are returned
newUser.facebook.email = profile.emails[0].value; // facebook can return multiple emails so we'll take the first
return done(null, newUser);
add the line profileFields: ['id', 'displayName', 'photos', 'emails', 'name'] in function passport.use(new FacebookStrategy({}
change the profile.ejs file by removing the local information div and changing the properties <% = user.facebook.id%> to <% = user.id%> and so on in the others.