<?php
    require_once 'autoload.php';
    require_once 'config.php';
    if ($_SESSION['page']){
    $lastpage = $_SESSION['page'];
    }else{
    $_SESSION['page'] = $_SERVER['HTTP_REFERER'];
    }
    // added in v4.0.0
    use Facebook\FacebookSession;
    use Facebook\FacebookRedirectLoginHelper;
    use Facebook\FacebookRequest;
    use Facebook\FacebookResponse;
    use Facebook\FacebookSDKException;
    use Facebook\FacebookRequestException;
    use Facebook\FacebookAuthorizationException;
    use Facebook\GraphObject;
    use Facebook\Entities\AccessToken;
    use Facebook\HttpClients\FacebookCurlHttpClient;
    use Facebook\HttpClients\FacebookHttpable;
    // init app with app id and secret
    FacebookSession::setDefaultApplication( 'removedID','removedSECRET' );
    // login helper with redirect_uri
    $helper = new FacebookRedirectLoginHelper('http://domain.com/assets/login.php' );
    try {
      $session = $helper->getSessionFromRedirect();
    } catch( FacebookRequestException $ex ) {
      // When Facebook returns an error
    } catch( Exception $ex ) {
      // When validation fails or other local issues
    }
    // see if we have a session
    if ( isset( $session ) ) {
      // graph api request for user data
      $request = new FacebookRequest( $session, 'GET', '/me?fields=id,name,email,gender');
      $response = $request->execute();
      // get response
      $graphObject = $response->getGraphObject();
            $fbid = $graphObject->getProperty('id');              // To Get Facebook ID
            $fbfullname = $graphObject->getProperty('name'); // To Get Facebook full name
            $femail = $graphObject->getProperty('email');    // To Get Facebook email
            $fbgender = $graphObject->getProperty('gender'); // To Get Facebook gender
            $token = $session->getToken();
        /* ---- Session Variables -----*/
            $_SESSION['FBID'] = $fbid;
            $_SESSION['FULLNAME'] = $fbfullname;
            $_SESSION['EMAIL'] =  $femail;
            $id = $_SESSION['FBID'];
            $name = $_SESSION['FULLNAME'];


        /* ---- Insert in Database -----*/
        $query = mysqli_query($db, 'SELECT * FROM users WHERE fbid="'.$id.'"');
        $checkacc = mysqli_num_rows($query);
        if($checkacc == "0"){
        $db->query("INSERT INTO users (`fbid`, `ime`, `token`, `email`, `aktivacija`, `gender`) VALUES ('$fbid', '$fbfullname', '$token', '$femail', 0, '$fbgender')");
    }
    $db->query("UPDATE users SET token='".$token."' WHERE fbid='".$id."'");
    copy('https://graph.facebook.com/'.$id.'/picture?width=150&height=150', '/home/sandip/www/slike/'.$id.'.jpeg');
    copy('https://graph.facebook.com/'.$id.'/picture?width=100&height=100', '/home/sandip/www/slike/small/'.$id.'.jpeg');
    copy('https://graph.facebook.com/'.$id.'/picture?width=200&height=200', '/home/sandip/www/slike/big/'.$id.'.jpeg');

    /* ---- header location after session ----*/
    header("Location: ".$lastpage);
    } else {
      $loginUrl = $helper->getLoginUrl();
     header("Location: ".$loginUrl);
    }
    ?>