ios - FOSOAuthServerBundle - generate manually an access token -

i have symfony2 website , web service secured via oauth using fosoauthserverbundle accessible via ios app. on website use fosuserbundle , fosfacebookbundle.

the thing miss giving possibility user login facebook on ios app , return him access_token oauth linked user account can access api other users.

so want send user facebookid , facebook_access_token webservice, check user correct (token matches app) , return authentication token.

question: there easy way add "facebook" grant_type fosoauthserverbundle ?

i know people have done seeing these questions:

• design facebook authentication in ios app accesses secured web service

• get application id user access token (or verify source application token)

but not explain how, not seem use fosoauthserverbundle , questions quite old.

i have tried using bundle: https://github.com/thefootballsocialclub/fscoauth2facebookgrantbundle

but bundle has been downloaded 9 times before me , not suited app (it considers facebook user username equals facebookid instance). guess want re-implement same kind of thing own way.

if has done our provide guidance appreciated.

thank you

to this, have add grant extensions, see official document "adding grant extensions" : https://github.com/friendsofsymfony/fosoauthserverbundle/blob/master/resources/doc/adding_grant_extensions.md

you can find facebookgrantextension token fb access_token :

class facebookgrantextension implements grantextensioninterface { protected $usermanager = null; protected $facebooksdk = null;  public function __construct(usermanager $usermanager, \basefacebook $facebooksdk) {     $this->usermanager = $usermanager;     $this->facebooksdk = $facebooksdk; }  /**  * @see oauth2\ioauth2grantextension::checkgrantextension  */ public function checkgrantextension(ioauth2client $client, array $inputdata, array $authheaders) {     if (!isset($inputdata['facebook_access_token'])) {         return false;     }      $this->facebooksdk->setaccesstoken($inputdata['facebook_access_token']);     try {         // try user facebook token open graph         $fbdata = $this->facebooksdk->api('/me');          if (empty($fbdata) || !isset($fbdata['id'])) {             return false;         }          // check if user match in database facebook id         $user = $this->usermanager->finduserby(array(             'facebookid' => $fbdata['id']         ));          // if no user found, register new user , grant token         if (null === $user) {             return false;         }          // else, return access_token user                     else {             return array(                 'data' => $user             );         }     } catch(\facebookapiexceptionion $e) {         return false;     } } } 

and config.yml :

my.oauth.facebook_extension:     class: my\corebundle\oauth\facebookgrantextension     arguments:         usermanager: "@fos_user.user_manager"         facebooksdk: "@fos_facebook.api"     tags:         - { name: fos_oauth_server.grant_extension, uri: 'http://grants.api.mywebsite.com/facebook_access_token' }