<?php

/**
 * Kunena Component
 *
 * @package        Kunena.Site
 *
 * @copyright      Copyright (C) 2008 - 2026 Kunena Team. All rights reserved.
 * @license        https://www.gnu.org/copyleft/gpl.html GNU/GPL
 * @link           https://www.kunena.org
 **/

namespace Kunena\Forum\Site;

/*
 * A light application to serve attachments to the users. Will only partially initialize Joomla to gain some speed.
 */

if (version_compare(PHP_VERSION, '7.2', '<')) {
    die('Your host needs to use PHP 7.2 or higher to run this version of Joomla!');
}

/*
 * Constant that is checked in included files to prevent direct access.
 */
/**
 *
 */
\define('_JEXEC', 1);

use Exception;
use Joomla\Application\Web\WebClient;
use Joomla\CMS\Application\WebApplication;
use Joomla\CMS\Factory;
use Joomla\CMS\Session\Session;
use Joomla\Input\Input;
use Joomla\Registry\Registry;
use Kunena\Forum\Site\Controller\Application\Attachment\Initial\AttachmentDisplay;

// Set base directory. This should usually work even with symbolic linked Kunena.
/**
 *
 */
\define('JPATH_BASE', \dirname(\dirname(\dirname(isset($_SERVER['SCRIPT_FILENAME']) ? $_SERVER['SCRIPT_FILENAME'] : __DIR__))));

// Define Joomla constants.
require_once JPATH_BASE . '/includes/defines.php';

// Installation check, and check on removal of the install directory.
if (
    !file_exists(JPATH_CONFIGURATION . '/configuration.php')
    || (fileSize(JPATH_CONFIGURATION . '/configuration.php') < 10)
) {
    echo 'No configuration file found and no installation code available. Exiting...';

    exit;
}

// Kunena check.
if (!file_exists(JPATH_ADMINISTRATOR . '/components/com_kunena/api.php')) {
    echo 'Kunena Forum not installed. Exiting...';

    exit;
}

// System includes
require_once JPATH_LIBRARIES . '/import.legacy.php';

// Bootstrap the CMS libraries.
require_once JPATH_LIBRARIES . '/cms.php';

require_once JPATH_BASE . '/includes/framework.php';

/**
 * Kunena Application
 *
 * @package  Kunena
 *
 * @since    K2.0
 */
class KunenaApplication extends WebApplication
{
    /**
     * @var     string
     * @since   Kunena 2.0
     */
    protected $_name = 'site';

    /**
     * @var     integer
     * @since   Kunena 2.0
     */
    protected $_clientId = 0;

    /**
     * @var     array
     * @since   Kunena 2.0
     */
    protected $userstate = [];

    /**
     * @param   Input|null      $input   input
     * @param   Registry|null   $config  config
     * @param   WebClient|null  $client  client
     *
     * @since   Kunena 6.0
     */
    public function __construct(Input $input = null, Registry $config = null, WebClient $client = null)
    {
        parent::__construct($input, $config, $client);

        // Load and set the dispatcher
        $this->loadDispatcher();

        // Register the application to FactoryF
        Factory::$application = $this;

        // Enable sessions by default.
        if (\is_null($this->config->session)) {
            $this->config->set('session', true);
        }

        // Set the session default name.
        if (\is_null($this->config->session_name)) {
            $this->config->set('session_name', 'site');
        }

        // Create the session if a session name is passed.
        if ($this->config->session !== false) {
            $this->loadSession();

            // Register the session with Factory
            Factory::$session = $this->getSession();
        }
    }

    /**
     * @param   Session|null  $session  session
     *
     * @return  $this
     *
     * @since   Kunena 6.0
     */
    public function loadSession(Session $session = null)
    {
        if ($session !== null) {
            $this['session'] = $session;

            return $this;
        }

        // Generate a session name.
        $name = md5($this->get('secret') . $this->get('session_name', \get_class($this)));

        // Calculate the session lifetime.
        $lifetime = (($this->get('lifetime')) ? $this->get('lifetime') * 60 : 900);

        // Get the session handler from the configuration.
        $handler = $this->get('session_handler', 'none');

        // Initialize the options for Session.
        $options = [
            'name'   => $name,
            'expire' => $lifetime,
        ];

        $session = Session::getInstance($handler, $options);
        $session->initialise($this->input, $this['dispatcher']);

        if ($session->getState() == 'expired') {
            $session->restart();
        } else {
            $session->start();
        }

        // Set the session object.
        $this['session'] = $session;

        return $this;
    }

    /**
     * @return  boolean
     *
     * @since   Kunena 6.0
     */
    public function isSite()
    {
        return true;
    }

    /**
     * @return  boolean
     *
     * @since   Kunena 6.0
     */
    public function isAdmin()
    {
        return false;
    }

    /**
     * @param   bool  $params  params
     *
     * @return  string
     *
     * @since   Kunena 6.0
     */
    public function getTemplate($params = false)
    {
        return 'system';
    }

    /**
     * @param   string  $name     name
     * @param   null    $default  default
     *
     * @return  null
     *
     * @since   Kunena 6.0
     */
    public function getUserState($name, $default = null)
    {
        return isset($this->userstate[$name]) ? $this->userstate[$name] : $default;
    }

    /**
     * @param   string   $name   name
     * @param   boolean  $value  value
     *
     * @return  void
     *
     * @since   Kunena 6.0
     */
    public function setUserState($name, $value)
    {
        $this->userstate[$name] = $value;
    }

    /**
     * @return  void
     *
     * @throws  null
     * @since   Kunena 6.0
     */
    protected function doExecute()
    {
        // Handle SEF.
        $query    = $this->input->getString('query', 'foo');
        $segments = explode('/', $query);

        $segment = array_shift($segments);
        $this->input->set('id', (int) $segment);
        $segment = array_shift($segments);

        if ($segment == 'thumb') {
            $this->input->set('thumb', 1);
        }

        $this->input->set('format', 'raw');

        $controller = new AttachmentDisplay();
        echo $controller->execute();
    }
}

$app = new KunenaApplication();

try {
    $app->execute();
} catch (Exception $e) {
    echo $e->getMessage();
}