Php Source - FirstLogin Plugin

This is a simple little plugin for redirecting the user in Joomla on their first login to a specified url/route.

<?php
/**
 * @version $Id$
 * @file     firstlogin.php
 * @category  Plugin
 * @package    System
 * @subpackage  FirstLogin
 * @copyright   Copyright (c) 2012 John William Wicks - All rights reserved!
 * @license    GNU/GPL, see LICENSE.php
 * Joomla! is free software. This version may have been modified pursuant
 * to the GNU General Public License, and as distributed it includes or
 * is derivative of works licensed under the GNU General Public License or
 * other free or open source software licenses.
 * See COPYRIGHT.php for copyright notices and details.
 *
 * @author    John 'Ghost' Wicks
 *
 */
defined('_JEXEC') or die;
jimport( 'joomla.plugin.plugin' );

class plgSystemFirstLogin extends JPlugin
{
  var $app;
  var $db;
  var $curUser;
  
  /**
   * Constructor
   *
   * For php4 compatibility not using the __constructor
   */
  function plgSystemFirstLogin(&$subject, $config){
    parent::__construct($subject, $config);
  }
  
  /**
   * onUserLogin - Method is called when user logs in after authentication
   *
   * @param   user    array holding user login data
   * @param   options    
   */
  function onUserLogin($user, $options){
    $retVal = true;
          
    $this->app = &JFactory::getApplication();
    
    if(!$this->app->isAdmin()){
      $this->db = &JFactory::getDbo();
      
      $w1 = $this->db->quoteName("username")."=".$this->db->quote($user["username"]);
      
      $query = $this->db->getQuery(true);
      $query->select('id');
      $query->from('#__users');
      $query->where($w1);
      $this->db->setQuery((string)$query);
      $result = $this->db->loadResult();
      
      if($result){
        $this->curUser = &JFactory::getUser($result);
      }
  
      if(!$this->curUser->guest && $this->curUser->lastvisitDate == "0000-00-00 00:00:00")
      {
        $this->app->setUserState("firstlogin", "route1");
        $this->curUser->setLastVisit();
      }
    }
    
    return $retVal;
  }
  
  function onAfterRoute(){
    $this->app = &JFactory::getApplication();
    
    if(!$this->app->isAdmin()){
      if($this->app->getUserState("firstlogin")){
        $route = $this->params->get('route1');
        $this->app->setUserState("firstlogin", 0);
        $this->app->redirect($route);
      }
    }
  }
}