<?php

/**
 * @package     Joomla.Administrator
 * @subpackage  com_admin
 *
 * @copyright   Copyright (C) 2005 - 2020 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\Path;
use Joomla\CMS\Language\Text;
use Joomla\Filesystem\File;
use Joomla\Registry\Registry;
use Joomla\Utilities\ArrayHelper;

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

/**
 * Notifies users of the new Behind Load Balancer option in Global Config, if we detect they might be behind a proxy
 *
 * @return  boolean
 *
 * @since   3.9.26
 */
function admin_postinstall_behindproxy_condition()
{
    $app = Factory::getApplication();

    if ($app->get('behind_loadbalancer', '0')) {
        return false;
    }

    if (array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER) && !empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
        return true;
    }

    if (array_key_exists('HTTP_CLIENT_IP', $_SERVER) && !empty($_SERVER['HTTP_CLIENT_IP'])) {
        return true;
    }

    return false;
}


/**
 * Enables the Behind Load Balancer setting in Global Configuration
 *
 * @return  void
 *
 * @since   3.9.26
 */
function behindproxy_postinstall_action()
{
    $prev = ArrayHelper::fromObject(new JConfig());
    $data = array_merge($prev, ['behind_loadbalancer' => '1']);

    $config = new Registry($data);

    // Set the configuration file path.
    $file = JPATH_CONFIGURATION . '/configuration.php';

    // Attempt to make the file writeable
    if (Path::isOwner($file) && !Path::setPermissions($file, '0644')) {
        Factory::getApplication()->enqueueMessage(Text::_('COM_CONFIG_ERROR_CONFIGURATION_PHP_NOTWRITABLE'), 'error');

        return;
    }

    // Attempt to write the configuration file as a PHP class named JConfig.
    $configuration = $config->toString('PHP', ['class' => 'JConfig', 'closingtag' => false]);

    if (!File::write($file, $configuration)) {
        Factory::getApplication()->enqueueMessage(Text::_('COM_CONFIG_ERROR_WRITE_FAILED'), 'error');

        return;
    }

    // Attempt to make the file unwriteable
    if (Path::isOwner($file) && !Path::setPermissions($file, '0444')) {
        Factory::getApplication()->enqueueMessage(Text::_('COM_CONFIG_ERROR_CONFIGURATION_PHP_NOTUNWRITABLE'), 'error');
    }
}
