<?php

declare(strict_types=1);

/*
 * 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!
 */

namespace TYPO3\CMS\Frontend\Middleware;

use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;
use TYPO3\CMS\Core\Http\HtmlResponse;
use TYPO3\CMS\Core\Http\Response;
use TYPO3\CMS\Core\Middleware\AbstractContentSecurityPolicyReporter;
use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Scope;
use TYPO3\CMS\Core\Site\Entity\Site;

/**
 * @internal
 */
class ContentSecurityPolicyReporter extends AbstractContentSecurityPolicyReporter
{
    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
    {
        $site = $request->getAttribute('site');
        $scope = Scope::frontendSite($site);
        if ($this->targetsCspReportUri($scope, $request)) {
            $dispositionMap = $this->dispositionMapFactory->buildDispositionMap(
                $site instanceof Site ? ($site->getConfiguration()['contentSecurityPolicies'] ?? []) : []
            );
            // find at least one configured reporting endpoint for the current request
            foreach ($dispositionMap->values() as $dispositionConfiguration) {
                if ($this->isCspReport($scope, $request, $dispositionConfiguration)) {
                    $isCspReport = true;
                    break;
                }
            }
            if (!($isCspReport ?? false)) {
                return new HtmlResponse('Submission to CSP reporting endpoint denied', 403);
            }
            // @todo check/store headers `origin` + `referer`
            // @todo create report, then call persist, then dispatch new event
            $this->persistCspReport($scope, $request);
            return (new Response())->withStatus(201);
        }
        return $handler->handle($request);
    }
}