<?php
declare(strict_types = 1);
namespace TYPO3\CMS\Frontend\Middleware;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use TYPO3\CMS\Core\TimeTracker\TimeTracker;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
 * Initializes the time tracker (singleton) for the whole TYPO3 Frontend
 *
 * @internal
 */
class TimeTrackerInitialization implements MiddlewareInterface
{
    /**
     * Starting time tracking (by setting up a singleton object)
     *
     * @param ServerRequestInterface $request
     * @param RequestHandlerInterface $handler
     * @return ResponseInterface
     */
    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
    {
        $configuredCookieName = trim($GLOBALS['TYPO3_CONF_VARS']['BE']['cookieName']) ?: 'be_typo_user';
        $timeTracker = GeneralUtility::makeInstance(
            TimeTracker::class,
            !empty($request->getCookieParams()[$configuredCookieName])
        );
        $timeTracker->start();
        $timeTracker->push('');

        return $handler->handle($request);
    }
}