2-integration-with-fosuserbundle.md

Integration with FOSUserBundle

If you still want to use the FOSUserBundle form login, add the "chain_provider" configuration parameter to your security.yml:

 providers:
   chain_provider:
      chain:
          providers: [fos_userbundle, my_fos_facebook_provider]
   fos_user_bundle: ...
   my_fos_facebook_provider: ...

This requires adding a service for the custom user provider, which is then set to the provider id in the "provider" section in config.yml:

  services:
      my.facebook.user:
          class: Acme\MyBundle\Security\User\Provider\FacebookProvider
          arguments:
              facebook: "@fos_facebook.api"
              userManager: "@fos_user.user_manager"
              validator: "@validator"

<?php

namespace Acme\MyBundle\Security\User\Provider;

use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
use Symfony\Component\Security\Core\Exception\UnsupportedUserException;
use Symfony\Component\Security\Core\User\UserProviderInterface;
use Symfony\Component\Security\Core\User\UserInterface;
use \BaseFacebook;
use \FacebookApiException;

class FacebookProvider implements UserProviderInterface
{
    /**
     * @var \Facebook
     */
    protected $facebook;
    protected $userManager;
    protected $validator;

    public function __construct(BaseFacebook $facebook, $userManager, $validator)
    {
        $this->facebook = $facebook;
        $this->userManager = $userManager;
        $this->validator = $validator;
    }

    public function supportsClass($class)
    {
        return $this->userManager->supportsClass($class);
    }

    public function findUserByFbId($fbId)
    {
        return $this->userManager->findUserBy(array('facebookId' => $fbId));
    }

    public function loadUserByUsername($username)
    {
        $user = $this->findUserByFbId($username);

        try {
            $fbdata = $this->facebook->api('/me');
        } catch (FacebookApiException $e) {
            $fbdata = null;
        }

        if (!empty($fbdata)) {
            if (empty($user)) {
                $user = $this->userManager->createUser();
                $user->setEnabled(true);
                $user->setPassword('');
            }

            // TODO use http://developers.facebook.com/docs/api/realtime
            $user->setFBData($fbdata);

            if (count($this->validator->validate($user, 'Facebook'))) {
                // TODO: the user was found obviously, but doesnt match our expectations, do something smart
                throw new UsernameNotFoundException('The facebook user could not be stored');
            }
            $this->userManager->updateUser($user);
        }

        if (empty($user)) {
            throw new UsernameNotFoundException('The user is not authenticated on facebook');
        }

        return $user;
    }

    public function refreshUser(UserInterface $user)
    {
        if (!$this->supportsClass(get_class($user)) || !$user->getFacebookId()) {
            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
        }

        return $this->loadUserByUsername($user->getFacebookId());
    }
}

Finally, one also needs to add getFacebookId() and setFBData() methods to the User model. The following example also adds "firstname" and "lastname" properties, using the Doctrine ORM:

<?php

namespace Acme\MyBundle\Entity;

use FOS\UserBundle\Entity\User as FOSBaseUser;
use Doctrine\ORM\Mapping as ORM;

class User extends FOSBaseUser
{
    /**
     * @var string
     *
     * @ORM\Column(name="firstname", type="string", length=255)
     */
    protected $firstname;

    /**
     * @var string
     *
     * @ORM\Column(name="lastname", type="string", length=255)
     */
    protected $lastname;

    /**
     * @var string
     *
     * @ORM\Column(name="facebookId", type="string", length=255)
     */
    protected $facebookId;

    public function serialize()
    {
        return serialize(array($this->facebookId, parent::serialize()));
    }

    public function unserialize($data)
    {
        list($this->facebookId, $parentData) = unserialize($data);
        parent::unserialize($parentData);
    }

    /**
     * @return string
     */
    public function getFirstname()
    {
        return $this->firstname;
    }

    /**
     * @param string $firstname
     */
    public function setFirstname($firstname)
    {
        $this->firstname = $firstname;
    }

    /**
     * @return string
     */
    public function getLastname()
    {
        return $this->lastname;
    }

    /**
     * @param string $lastname
     */
    public function setLastname($lastname)
    {
        $this->lastname = $lastname;
    }

    /**
     * Get the full name of the user (first + last name)
     * @return string
     */
    public function getFullName()
    {
        return $this->getFirstname() . ' ' . $this->getLastname();
    }

    /**
     * @param string $facebookId
     * @return void
     */
    public function setFacebookId($facebookId)
    {
        $this->facebookId = $facebookId;
        $this->setUsername($facebookId);
    }

    /**
     * @return string
     */
    public function getFacebookId()
    {
        return $this->facebookId;
    }

    /**
     * @param Array
     */
    public function setFBData($fbdata)
    {
        if (isset($fbdata['id'])) {
            $this->setFacebookId($fbdata['id']);
            $this->addRole('ROLE_FACEBOOK');
        }
        if (isset($fbdata['first_name'])) {
            $this->setFirstname($fbdata['first_name']);
        }
        if (isset($fbdata['last_name'])) {
            $this->setLastname($fbdata['last_name']);
        }
        if (isset($fbdata['email'])) {
            $this->setEmail($fbdata['email']);
        }
    }
}

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