/
lib_login.php
115 lines (99 loc) · 3.43 KB
/
lib_login.php
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<?php if (! defined('BASEPATH')) exit('No direct script access allowed');
/**
* Name: Facebook Login Library
*
* Author: appleboy
*
*/
require 'vendor/autoload.php';
use Facebook\FacebookSession;
use Facebook\FacebookRequest;
use Facebook\GraphUser;
use Facebook\FacebookRequestException;
use Facebook\FacebookRedirectLoginHelper;
class Lib_login
{
/**
* CodeIgniter global
*
* @var string
**/
protected $ci;
/**
* __construct
*
* @return void
* @author Ben
**/
public function __construct()
{
$this->ci =& get_instance();
$this->ci->load->library('session');
$this->ci->config->load('facebook');
if (! isset($_SESSION)) {
session_start();
}
}
public function facebook()
{
$facebook_default_scope = explode(',', $this->ci->config->item("facebook_default_scope"));
$facebook_app_id = $this->ci->config->item("facebook_app_id");
$facebook_api_secret = $this->ci->config->item("facebook_api_secret");
// init app with app id and secret
FacebookSession::setDefaultApplication($facebook_app_id, $facebook_api_secret);
// login helper with redirect_uri
$helper = new FacebookRedirectLoginHelper(site_url('login/facebook'));
// see if a existing session exists
if (isset($_SESSION) && isset($_SESSION['fb_token'])) {
// create new session from saved access_token
$session = new FacebookSession($_SESSION['fb_token']);
// validate the access_token to make sure it's still valid
try {
if (!$session->validate()) {
$session = null;
}
} catch (Exception $e) {
// catch any exceptions
$session = null;
}
}
if (!isset($session) || $session === null) {
// no session exists
try {
$session = $helper->getSessionFromRedirect();
} catch(FacebookRequestException $ex) {
// When Facebook returns an error
// handle this better in production code
print_r($ex);
} catch(Exception $ex) {
// When validation fails or other local issues
// handle this better in production code
print_r($ex);
}
}
// see if we have a session
if (isset($session)) {
// save the session
$_SESSION['fb_token'] = $session->getToken();
// create a session using saved token or the new one we generated at login
$session = new FacebookSession($session->getToken());
// graph api request for user data
$request = new FacebookRequest($session, 'GET', '/me');
$response = $request->execute();
// get response
$graphObject = $response->getGraphObject()->asArray();
$fb_data = array(
'me' => $graphObject,
'loginUrl' => $helper->getLoginUrl($facebook_default_scope)
);
$this->ci->session->set_userdata('fb_data', $fb_data);
} else {
$fb_data = array(
'me' => null,
'loginUrl' => $helper->getLoginUrl($facebook_default_scope)
);
$this->ci->session->set_userdata('fb_data', $fb_data);
}
return $fb_data;
}
}