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khosb/modules/oauth/classes/Auth/ORM/External/OAuth.php

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2013-05-27 12:10:41 +00:00
<?php defined('SYSPATH') or die('No direct access allowed.');
/**
* This class extends Auth_ORM to enable external authentication
*
* @package OAuth
* @category Classes
* @author Deon George
* @copyright (c) 2009-2013 Deon George
* @license http://dev.leenooks.net/license.html
*/
abstract class Auth_ORM_External_OAuth extends Auth_ORM_External {
// OAuth Objects
protected $consumer;
protected $provider;
protected $token;
public function __construct(Model_Oauth $oo) {
// If our user refused, then no point continuing
if ($problem = Arr::get($_REQUEST,'oauth_problem'))
switch ($problem) {
case 'user_refused':
HTTP::redirect('login');
default:
throw HTTP_Exception::factory(501,'Unknown OAuth Problem :problem',array(':problem'=>$problem));
}
parent::__construct($oo);
// Load the provider
$this->provider = OAuth_Provider::factory($this->oo->name);
// Load the consumer for this provider
$this->consumer = OAuth_Consumer::factory(array(
'key'=>$this->oo->app_id,
'secret'=>$this->oo->secret,
));
}
protected function _login($user,$password,$remember) {
// During login, we dont need to keep out token anymore
Session::instance()->delete('oauth.token');
return parent::_login($user,$password,$remember);
}
/**
* Is user currently log in??
* If we have a valid token, then we are.
*/
public function logged_in($role=NULL,$debug=NULL) {
// Attempt to complete signin
if ($verifier = Arr::get($_REQUEST,'oauth_verifier')) {
// Restart the login process
if (! $token = Session::instance()->get_once('oauth.request') OR $token->token !== Arr::get($_REQUEST,'oauth_token'))
return FALSE;
// Store the verifier in the token
$token->verifier($verifier);
// Exchange the request token for an access token
$this->token = $this->provider->access_token($this->consumer,$token);
// Store the access token
Session::instance()->set('oauth.token',$this->token);
// Otherwise try and get our token from our session.
} else {
$this->token = Session::instance()->get('oauth.token');
}
// @todo We need to check that the token is still valid.
return $this->token ? TRUE : FALSE;
}
/**
* Our URL that starts the login process
*/
public function login_url() {
// Add the callback URL to the consumer
$this->consumer->callback(URL::site('oauth/login/'.$this->oo->name,TRUE));
// Get a request token for the consumer
$token = $this->provider->request_token($this->consumer);
// Store the token
Session::instance()->set('oauth.request',$token);
// Get the login URL from the provider
return $this->provider->authorize_url($token);
}
public function user_id() {
return $this->provider->user_details($this->consumer,$this->token)->id();
}
}
?>