<?php

/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\CMS\Dispatcher;

use Joomla\CMS\Application\CMSApplication;
use Joomla\CMS\Language\Text;

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

/**
 * Base class for a legacy Joomla Dispatcher
 *
 * Executes the single entry file of a legacy component.
 *
 * @since  4.0.0
 */
class LegacyComponentDispatcher implements DispatcherInterface
{
    /**
     * The application instance
     *
     * @var    CMSApplication
     * @since  4.0.0
     */
    private $app;

    /**
     * Constructor for Dispatcher
     *
     * @param   CMSApplication  $app  The application instance
     *
     * @since   4.0.0
     */
    public function __construct(CMSApplication $app)
    {
        $this->app = $app;
    }

    /**
     * Dispatch a controller task. Redirecting the user if appropriate.
     *
     * @return  void
     *
     * @since   4.0.0
     */
    public function dispatch()
    {
        $path = JPATH_COMPONENT . '/' . substr($this->app->scope, 4) . '.php';

        // If component file doesn't exist throw error
        if (!is_file($path)) {
            throw new \Exception(Text::_('JLIB_APPLICATION_ERROR_COMPONENT_NOT_FOUND'), 404);
        }

        $lang = $this->app->getLanguage();

        // Load common and local language files.
        $lang->load($this->app->scope, JPATH_BASE) || $lang->load($this->app->scope, JPATH_COMPONENT);

        // Execute the component
        $loader = static function ($path) {
            require_once $path;
        };
        $loader($path);
    }
}
