/**
* Takes an identity provider access token and fetches the user data from that provider.
* A new User object is created if that user doesn't exist.
* Access tokens are returned upon successful authentication using one of the SDKs from
* Facebook, Google, Twitter, etc.
* <b>Note:</b> Twitter uses OAuth 1 and gives you a token and a token secret.
* <b>You must concatenate them like this: <code>{oauth_token}:{oauth_token_secret}</code> and
* use that as the provider access token.</b>
* @param $provider identity provider, e.g. 'facebook', 'google'...
* @param $providerToken access token from a provider like Facebook, Google, Twitter
* @return ParaObject|null a User object or null if something failed
*/
public function signIn($provider, $providerToken)
{
if ($provider != null && $providerToken != null) {
$credentials = array();
$credentials["appid"] = $this->accessKey;
$credentials["provider"] = $provider;
$credentials["token"] = $providerToken;
$result = $this->getEntity($this->invokePost(self::JWT_PATH, $credentials));
if ($result != null && array_key_exists("user", $result) && array_key_exists("jwt", $result)) {
$jwtData = $result["jwt"];
$userData = $result["user"];
$this->tokenKey = $jwtData["access_token"];
$this->tokenKeyExpires = $jwtData["expires"];
$this->tokenKeyNextRefresh = $jwtData["refresh"];
$obj = new ParaObject();
$obj->setFields($userData);
return $obj;
} else {
$this->clearAccessToken();
}
}
return null;
}
