connect-auth example (using: multi strategy, multi scope)

app.js

const express = require('express');
const auth = require('connect-auth');
const app = express.createServer();

// see: https://gist.github.com/1292608
(function (){
  // yet another google oauth2
  Object.defineProperty(auth, 'GoogleV2', {
    get: function() {
      return require('./lib/connect-oauth-google-v2/google2');
    },
    enumerable:true
  });
})();

app.use(auth([
  auth.Facebook({
    appId: '...',
    appSecret: '...',
    callback: '/scopeA/callback'
    scope: 'email, publish_stream, offline_access, read_stream',
    name: 'scopeA'
  }),
  auth.GoogleV2({
    appId: '...',
    appSecret: '...',
    callback: '/scopeB/callback',
    scope: 'https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile',
    name: 'scopeB'
  }),
  auth.Facebook({
    appId: '...',
    appSecret: '...',
    callback: '/scopeC/callback'
    scope: 'email, publish_stream, offline_access, read_stream',
    name: 'scopeC'
  }),
  auth.GoogleV2({
    appId: '...',
    appSecret: '...',
    callback: '/scopeD/callback',
    scope: 'https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile',
    name: 'scopeD'
  })
]));


app.createProtection = function(scopeKey, authenticateCallback){
  return function(req, res, next){
    if(req.isAuthenticated(scopeKey)){
      return next();
    }

    req.getAuthScopeData = function (){
      return req.getAuthDetails().scopedUsers[scopeKey];
    };

    return req.authenticate(scopeKey, {scope: scopeKey}, function(err, authenticated){
      if(err){
        return next(err);
      }

      if(authenticated){
        return authenticateCallback(req, res, function(err){
          if(err){
            return next(err);
          }
          return next();
        });
      }
    });
  };
};

(function (){
  const protect = app.createProtection('scopeA', function(req, res, next){
    console.log(req.getAuthScopeData());
  });
  app.get('/scopeA/callback', protect, function(req, res){
    return res.send('scopeA');
  });
})();
(function (){
  const protect = app.createProtection('scopeB', function(req, res, next){
    console.log(req.getAuthScopeData());
  });
  app.get('/scopeB/callback', protect, function(req, res){
    return res.send('scopeB');
  });
})();
(function (){
  const protect = app.createProtection('scopeC', function(req, res, next){
    console.log(req.getAuthScopeData());
  });
  app.get('/scopeC/callback', protect, function(req, res){
    return res.send('scopeC');
  });
})();
(function (){
  const protect = app.createProtection('scopeD', function(req, res, next){
    console.log(req.getAuthScopeData());
  });
  app.get('/scopeD/callback', protect, function(req, res){
    return res.send('scopeD');
  });
})();