/administrator/components/com_login/models/login.php

<?php
/**
 * @copyright	Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license		GNU General Public License, see LICENSE.php
 */

// No direct access.
defined('_JEXEC') or die;

jimport( 'joomla.application.component.model' );

/**
 * Login Model
 *
 * @package		Joomla.Administrator
 * @subpackage	com_login
 * @since		1.5
 */
class LoginModelLogin extends JModel
{
	/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @since	1.6
	 */
	protected function populateState()
	{
		$credentials = array(
			'username' => JRequest::getVar('username', '', 'method', 'username'),
			'password' => JRequest::getVar('passwd', '', 'post', 'string', JREQUEST_ALLOWRAW)
		);
		$this->setState('credentials', $credentials);

		// check for return URL from the request first
		if ($return = JRequest::getVar('return', '', 'method', 'base64')) {
			$return = base64_decode($return);
			if (!JURI::isInternal($return)) {
				$return = '';
			}
		}

		// Set the return URL if empty.
		if (empty($return)) {
			$return = 'index.php';
		}

		$this->setState('return', $return);
	}

	/**
	 * Get the administrator login module by name (real, eg 'login' or folder, eg 'mod_login')
	 *
	 * @param   string  $name   The name of the module
	 * @param   string  $title  The title of the module, optional
	 *
	 * @return  object  The Module object
	 *
	 * @since   11.1
	 */
	public static function getLoginModule($name = 'mod_login', $title = null)
	{
		$result		= null;
		$modules	= LoginModelLogin::_load($name);
		$total		= count($modules);

		for ($i = 0; $i < $total; $i++)
		{
			// Match the title if we're looking for a specific instance of the module
			if (!$title || $modules[$i]->title == $title) {
				$result = $modules[$i];
				break;	// Found it
			}
		}

		// If we didn't find it, and the name is mod_something, create a dummy object
		if (is_null($result) && substr($name, 0, 4) == 'mod_') {
			$result				= new stdClass;
			$result->id			= 0;
			$result->title		= '';
			$result->module		= $name;
			$result->position	= '';
			$result->content	= '';
			$result->showtitle	= 0;
			$result->control	= '';
			$result->params		= '';
			$result->user		= 0;
		}

		return $result;
	}
	/**
	 * Load login modules.
	 *
	 * Note that we load regardless of state or access level since access
	 * for public is the only thing that makes sense since users are not logged in
	 * and the module lets them log in.
	 * This is put in as a failsafe to avoid super user lock out caused by an unpublished
	 * login module or by a module set to have a viewing access level that is not Public.
	 *
	 * @param   string  $name   The name of the module
	 *
	 * @return  array
	 *
	 * @since   11.1
	 */
	protected static function _load($module)
	{
		static $clean;

		if (isset($clean)) {
			return $clean;
		}

		$app		= JFactory::getApplication();
		$lang 		= JFactory::getLanguage()->getTag();
		$clientId 	= (int) $app->getClientId();

		$cache 		= JFactory::getCache ('com_modules', '');
		$cacheid 	= md5(serialize(array( $clientId, $lang)));
		$loginmodule = array();

		if (!($clean = $cache->get($cacheid))) {
			$db	= JFactory::getDbo();

			$query = $db->getQuery(true);
			$query->select('m.id, m.title, m.module, m.position, m.showtitle, m.params');
			$query->from('#__modules AS m');
			$query->where('m.module =' . $db->Quote($module) .' AND m.client_id = 1');

			$query->join('LEFT', '#__extensions AS e ON e.element = m.module AND e.client_id = m.client_id');
			$query->where('e.enabled = 1');

			// Filter by language
			if ($app->isSite() && $app->getLanguageFilter()) {
				$query->where('m.language IN (' . $db->Quote($lang) . ',' . $db->Quote('*') . ')');
			}

			$query->order('m.position, m.ordering');

			// Set the query
			$db->setQuery($query);
			$modules = $db->loadObjectList();

			if ($db->getErrorNum()){
				JError::raiseWarning(500, JText::sprintf('JLIB_APPLICATION_ERROR_MODULE_LOAD', $db->getErrorMsg()));
				return $loginmodule;
			}


			// Return to simple indexing that matches the query order.
			$loginmodule = $modules;

			$cache->store($loginmodule, $cacheid);
		}

		return $loginmodule;
	}
}