koa-passport-sequelize

'use strict';

var koa = require('koa'),
    passport = require('koa-passport'),
    FacebookStrategy = require('passport-facebook').Strategy,
    Router = require('koa-router'),
    Sequelize = require('sequelize');

require('dotenv').load();

/*
 * Configure database
 */
var database = new Sequelize(
  process.env.DB_DATABASE,
  process.env.DB_USERNAME,
  process.env.DB_PASSWORD,
  {
    host: process.env.DB_URL,
    dialect: 'postgres',
  }
);
var User = database.define('user', {
  name: Sequelize.STRING,
  facebook_user_id: Sequelize.BIGINT
});
database.sync();

var app = koa();

/* 
 * Configure Routes
 */
var router = new Router();
router.get('/', function *() {
  this.body = "<a href='/auth/facebook'>Login</a>";
});
router.get('/auth/facebook',
  passport.authenticate('facebook')
);
router.get('/auth/facebook/callback',
  passport.authenticate('facebook', {
    successRedirect: '/',
    failureRedirect: '/',
  })
);
app.use(router.routes());

/* 
 * Configure Passport
 */
passport.serializeUser(function(user, done) {
  done(null, user);
});
passport.deserializeUser(function(user, done) {
  done(null, user);
});

passport.use(new FacebookStrategy({
  clientID: process.env.FB_OAUTH_ID,
  clientSecret: process.env.FB_OAUTH_SECRET,
  callbackURL: 'http://localhost:3000/auth/facebook/callback'
}, function(token, tokenSecret, profile, done) {
  /* XXX: I think it should look like this
  var user = yield User.findOne({
    where: { facebook_user_id: profile.id }
  });
  console.log('---');
  console.log(user);
  console.log('---');
  */

  // XXX: This is the only way I can get it to work
  User.findOne({
    where: { facebook_user_id: profile.id }
  }).then(function(user) {
    console.log('---');
    console.log(user);
    console.log('---');
    done(null, user);
  });
}));

/*
 * Some middleware so we can see what's happening
 */
app.use(function *(next) {
  console.log('%s %s - %s ms', this.method, this.url);
  yield(next);
});

app.listen(3000);
console.log("listening on http://localhost:3000");