<?php

/**
 * @package     Joomla.Administrator
 * @subpackage  com_login
 *
 * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Login\Administrator\Model;

use Joomla\CMS\Cache\Exception\CacheExceptionInterface;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Model\BaseDatabaseModel;
use Joomla\CMS\Uri\Uri;
use Joomla\Database\Exception\ExecutionFailureException;

// phpcs:disable PSR1.Files.SideEffects
\defined('_JEXEC') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * Login Model
 *
 * @since  1.5
 */
class LoginModel extends BaseDatabaseModel
{
    /**
     * Method to auto-populate the model state.
     *
     * Note. Calling getState in this method will result in recursion.
     *
     * @return  void
     *
     * @since   1.6
     */
    protected function populateState()
    {
        $input = Factory::getApplication()->input->getInputForRequestMethod();

        $credentials = array(
            'username'  => $input->get('username', '', 'USERNAME'),
            'password'  => $input->get('passwd', '', 'RAW'),
            'secretkey' => $input->get('secretkey', '', 'RAW'),
        );

        $this->setState('credentials', $credentials);

        // Check for return URL from the request first.
        if ($return = $input->get('return', '', 'BASE64')) {
            $return = base64_decode($return);

            if (!Uri::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  $title  The title of the module, optional.
     *
     * @return  object  The Module object.
     *
     * @since   1.7.0
     */
    public static function getLoginModule($name = 'mod_login', $title = null)
    {
        $result = null;
        $modules = self::_load($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;
            }
        }

        // 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  $module  The name of the module.
     *
     * @return  array
     *
     * @since   1.7.0
     */
    protected static function _load($module)
    {
        static $clean;

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

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

        /** @var \Joomla\CMS\Cache\Controller\CallbackController $cache */
        $cache = Factory::getCache('com_modules', 'callback');

        $loader = function () use ($app, $lang, $module) {
            $db = Factory::getDbo();

            $query = $db->getQuery(true)
                ->select(
                    $db->quoteName(
                        [
                            'm.id',
                            'm.title',
                            'm.module',
                            'm.position',
                            'm.showtitle',
                            'm.params'
                        ]
                    )
                )
                ->from($db->quoteName('#__modules', 'm'))
                ->where($db->quoteName('m.module') . ' = :module')
                ->where($db->quoteName('m.client_id') . ' = 1')
                ->join(
                    'LEFT',
                    $db->quoteName('#__extensions', 'e'),
                    $db->quoteName('e.element') . ' = ' . $db->quoteName('m.module') .
                    ' AND ' . $db->quoteName('e.client_id') . ' = ' . $db->quoteName('m.client_id')
                )
                ->where($db->quoteName('e.enabled') . ' = 1')
                ->bind(':module', $module);

            // Filter by language.
            if ($app->isClient('site') && $app->getLanguageFilter()) {
                $query->whereIn($db->quoteName('m.language'), [$lang, '*']);
            }

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

            // Set the query.
            $db->setQuery($query);

            return $db->loadObjectList();
        };

        try {
            return $clean = $cache->get($loader, array(), md5(serialize(array($clientId, $lang))));
        } catch (CacheExceptionInterface $cacheException) {
            try {
                return $loader();
            } catch (ExecutionFailureException $databaseException) {
                Factory::getApplication()->enqueueMessage(
                    Text::sprintf('JLIB_APPLICATION_ERROR_MODULE_LOAD', $databaseException->getMessage()),
                    'error'
                );

                return array();
            }
        } catch (ExecutionFailureException $databaseException) {
            Factory::getApplication()->enqueueMessage(Text::sprintf('JLIB_APPLICATION_ERROR_MODULE_LOAD', $databaseException->getMessage()), 'error');

            return array();
        }
    }
}