/**
* Determines the connected user by first examining any signed
* requests, then considering an authorization code, and then
* falling back to any persistent store storing the user.
*
* @return integer The id of the connected Facebook user, or 0 if no such user exists.
*/
protected function getUserFromAvailableData()
{
// if a signed request is supplied, then it solely determines
// who the user is.
if ($signedRequest = $this->getSignedRequest()) {
if (array_key_exists('user_id', $signedRequest)) {
if ($signedRequest['user_id'] != $this->session->user_id) {
$this->session->clearAll();
}
return $this->session->user_id = $signedRequest['user_id'];
}
// if the signed request didn't present a user id, then invalidate
// all entries in any persistent store.
$this->session->clearAll();
return 0;
}
$user = $this->session->get('user_id', 0);
// use access_token to fetch user id if we have a user access_token, or if
// the cached access token has changed.
if (($accessToken = $this->getAccessToken()) && $accessToken !== $this->config->getApplicationAccessToken() && !($user && $this->session->access_token === $accessToken)) {
if (!($user = $this->getUserFromAccessToken())) {
$this->session->clearAll();
} else {
$this->session->user_id = $user;
}
}
return $user;
}
/**
* @param \Nette\Http\Session $session
* @param Configuration $config
*/
public function __construct(Nette\Http\Session $session, Configuration $config)
{
$this->session = $session->getSection('Facebook/' . $config->getApplicationAccessToken());
}
