Symfony2: How to login using OAuth (HWIOAuthBundle) + custom roles (by default and loaded from DB)

UPDATE:

I tried using this code in one of my recent projects and it didn't work anymore. The reason is that HWIOAuthBundle has updated a few times and the config files are not the same. I put the code above as well as login to a few other social networks in a github which you can find at HWIOAuthBundleByExample.

I have a week experience with symfony2 and in the past days that's what i was working myself. Found your question today (when i was still researching).

I'm gonna present you what I had to do, based on what data, and how i did it. After that, I'll try giving you some key links and I hope you'll manage to modelate for your needs.

My app needs Facebook login and ADMIN role. Because will only be a few administrators, I only need a few Facebook IDs when authentificating, so I store them in a yaml array. (See at the end how you can load them from database).

Here's what I did:

#/app/config.yml #the setup looks different (I need the picture and email credentials)
hwi_oauth:
  # name of the firewall in which this bundle is active, this setting MUST be set
  firewall_name: secured_area
  resource_owners:
    facebook:
      type:        facebook
      client_id:       %facebook_client_id%
      client_secret:     %facebook_client_secret%
      scope:         "email"
      infos_url:     "https://graph.facebook.com/me?fields=username,name,email,picture.type(square)"
      paths:
        email:          email
        profilepicture: picture.data.url
services: #here's where the magic happens
  hwi_oauth.user.provider.entity:
    class: HWI\Bundle\OAuthBundle\Security\Core\User\OAuthUserProvider
  ib_user.oauth_user_provider:
    class: Acme\DemoBundle\Provider\Provider
    arguments: [@session, @doctrine, %admins%]

#app/security.yml
security:
  providers:
    my_custom_hwi_provider:
      id: ib_user.oauth_user_provider

  access_control:
        - { path: ^/admin, roles: ROLE_SUPER_ADMIN }



#app/parameters.yml
parameters:
  #...
  facebook_client_id:     ###
  facebook_client_secret: ###
  admins:
    - "my.facebook.id"

#Acme\DemoBundle\Provider\Provider
<?php

namespace Acme\DemoBundle\Provider;

use HWI\Bundle\OAuthBundle\Security\Core\User\OAuthUserProvider;
use HWI\Bundle\OAuthBundle\OAuth\Response\UserResponseInterface;
use Acme\DemoBundle\Entity\User;
use Acme\DemoBundle\Provider\OAuthUser;

class Provider extends OAuthUserProvider
{
    protected $session, $doctrine, $admins;
    public function __construct($session, $doctrine, $admins) {
        $this->session = $session;
        $this->doctrine = $doctrine;
        $this->admins = $admins;
    }

    public function loadUserByUsername($username)
    {
        return new OAuthUser($username, $this->isUserAdmin($username)); //look at the class below
    }

    private function isUserAdmin($nickname)
    {
        return in_array($nickname, $this->admins);
    }

    public function loadUserByOAuthUserResponse(UserResponseInterface $response)
    {
        //data from facebook response
        $facebook_id = $response->getUsername();
        $nickname = $response->getNickname();
        $realname = $response->getRealName();
        $email    = $response->getEmail();
        $avatar   = $response->getProfilePicture();

        //set data in session
        $this->session->set('nickname', $nickname);
        $this->session->set('realname', $realname);
        $this->session->set('email', $email);
        $this->session->set('avatar', $avatar);

        //get user by fid
        $qb = $this->doctrine->getManager()->createQueryBuilder();
        $qb ->select('u.id')
            ->from('AcmeDemoBundle:User', 'u')
            ->where('u.fid = :fid')
            ->setParameter('fid', $facebook_id)
            ->setMaxResults(1);
        $result = $qb->getQuery()->getResult();

        //add to database if doesn't exists
        if ( !count($result) ) {
            $User = new User();
            $User->setCreatedAt(new \DateTime());
            $User->setNickname($nickname);
            $User->setRealname($realname);
            $User->setEmail($email);
            $User->setAvatar($avatar);
            $User->setFID($facebook_id);

            $em = $this->doctrine->getManager();
            $em->persist($User);
            $id = $em->flush();
        } else {
            $id = $result[0]['id'];
        }

        //set id
        $this->session->set('id', $id);

        //@TODO: hmm : is admin
        if ($this->isUserAdmin($nickname)) {
            $this->session->set('is_admin', true);
        }

        //parent:: returned value
        return $this->loadUserByUsername($response->getNickname());
    }

    public function supportsClass($class)
    {
        return $class === 'Acme\\DemoBundle\\Provider\\OAuthUser';
    }
}


#Acme\DemoBundle\Provider\OAuthUser
<?php

namespace Acme\DemoBundle\Provider;

use HWI\Bundle\OAuthBundle\Security\Core\User\OAuthUser as HWIOAuthUser;

class OAuthUser extends HWIOAuthUser{
    private $isAdmin = false;
    public function __construct($username, $isAdmin = false)
    {
        parent::__construct($username);
        $this->isAdmin = $isAdmin;
    }

    public function getRoles()
    {
        $roles = array('ROLE_USER', 'ROLE_OAUTH_USER');

        if ($this->isAdmin) {
            array_push($roles, 'ROLE_SUPER_ADMIN');
        }

        return $roles;
    }
}

So you can pretty much see that when facebook login response comes, I do the database checks (based on the facebook graph ID), and add it if needed. Also, I set some things in sessions (you won't need this), and after that I must also return a HWI\Bundle\OAuthBundle\Security\Core\User\OAuthUser object (this is where the sf2 gets it's roles). So I extend it (in this way i have acces to $isAdmin). As you said, you need roles for each user and you must also edit them. For that, you can implement getRoles() with a ManyToMany relationship (give access to doctrine entityManager via constructor). You can see that applied here: http://symfony.com/doc/current/cookbook/security/entity_provider.html#managing-roles-in-the-database .

As I said, you must tweak it a lot (my only app is facebook-only login and with a in_memory like security access), but I wish myself I had a code like that when i started. So I really hope this hels you. Post your questions, if any.