From facebook token to jwt token - angularjs

Question

I'm using the passport module to authenticate a user and generate a jwt token.
Now I want to make facebook login possible. I'm in the phase that I get a fb token and facebook id.
What am I supposed to do with this info? Currently I make a new user that has a variable with facebook id but without a password.
Without a password I can't generate a jwt token, thus I cannot login.
How does this work?
My front end is angular and my API is written with nodejs, express & mongoose.
Passport code:
passport.use(new LocalStrategy(
function(username, password, done) {
User.findOne({ username: username }, function (err, user) {
if (err) { return done(err); }
if (!user) {
return done(null, false, { message: 'Incorrect username.' });
}
if (!user.validPassword(password)) {
return done(null, false, { message: 'Incorrect password.' });
}
return done(null, user);
});
}
));
generatejwt code:
UserSchema.methods.generateJWT = function() {
// set expiration to 60 days
var today = new Date();
var exp = new Date(today);
exp.setDate(today.getDate() + 60);
return jwt.sign({
_id: this._id,
username: this.username,
exp: parseInt(exp.getTime() / 1000),
}, 'SECRET');
};

Answer 1

You need to create 2 routes :
1) This will be called to login to facebook.
2)Callback route if the user authentication is successful.(This callback route needs to be registered in the facebook developer portal.
//Facebook Login
app.route('/auth/facebook')
.get(passport.authenticate('facebook', { scope: 'email' }));
// Callback
app.route('/auth/facebook/callback')
.get(passport.authenticate('facebook'),users.generateJWT);
Define a facebook strategy that will store the user details (id, token, email) in your database
var facebookStrategy = new FacebookStrategy({
clientID: cfg.facebook.clientID,
clientSecret: cfg.facebook.clientSecret,
callbackURL: cfg.facebook.callbackURL,
profileFields: ['id', 'email', 'first_name', 'last_name']
},
function(token, refreshToken, profile, done) {
console.log("Token: "+ token);
console.log("RefreshToken: "+ refreshToken);
console.log("profile: "+ profile);
process.nextTick(function() {
User.findOne({ 'facebook.id': profile.id }, function(err, user) {
if (err)
return done(err);
if (user) {
console.log("User Found");
return done(null, user);
} else {
console.log("Creating user");
var newUser = new User();
console.log("Token: "+ token);
newUser.facebook.id = profile.id;
newUser.facebook.token = token;
newUser.facebook.name = profile.name.givenName + ' ' + profile.name.familyName;
newUser.facebook.email = (profile.emails[0].value || '').toLowerCase();
newUser.save(function(err) {
if (err)
throw err;
return done(null, newUser);
});
}
});
});
});
In the controller, write the below code for callback route:
/**
* Generate JWT Token
*/
exports.generateJWT = function(req, res) {
var token;
token = req.user.generateJwt();
res.status(200);
res.json({
"token" : token
});
};