VITEC-website/packages/vitec/Classes/Controller/Backend/SsrController.php

<?php

declare(strict_types=1);

namespace Evomedien\Vitec\Controller\Backend;

use Evomedien\Vitec\Service\SsrPurgeService;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use TYPO3\CMS\Backend\Attribute\AsController;
use TYPO3\CMS\Backend\Routing\UriBuilder;
use TYPO3\CMS\Backend\Template\ModuleTemplateFactory;
use TYPO3\CMS\Core\Core\Environment;
use TYPO3\CMS\Core\Database\ConnectionPool;
use TYPO3\CMS\Core\Http\RedirectResponse;
use TYPO3\CMS\Core\Http\RequestFactory;
use TYPO3\CMS\Core\Messaging\FlashMessage;
use TYPO3\CMS\Core\Messaging\FlashMessageService;
use TYPO3\CMS\Core\Type\ContextualFeedbackSeverity;
use TYPO3\CMS\Core\Utility\GeneralUtility;

/**
 * Backend module "VITEC SSR": live state of the SSR node, manual purge
 * (single paths or everything) and the purge/health protocol.
 */
#[AsController]
final class SsrController
{
    public function __construct(
        private readonly ModuleTemplateFactory $moduleTemplateFactory,
        private readonly SsrPurgeService $purgeService,
        private readonly RequestFactory $requestFactory,
        private readonly ConnectionPool $connectionPool,
        private readonly FlashMessageService $flashMessageService,
        private readonly UriBuilder $uriBuilder,
    ) {}

    public function indexAction(ServerRequestInterface $request): ResponseInterface
    {
        $view = $this->moduleTemplateFactory->create($request);
        $view->setTitle('VITEC SSR');

        $health = null;
        $healthError = '';
        $endpoint = $this->purgeService->getHealthEndpoint();
        if ($endpoint === '') {
            $healthError = 'var/vitec-ssr-purge.env fehlt oder ist unvollständig.';
        } else {
            $start = microtime(true);
            try {
                $response = $this->requestFactory->request($endpoint, 'GET', [
                    'timeout' => 3, 'connect_timeout' => 2, 'http_errors' => false,
                ]);
                if ($response->getStatusCode() === 200) {
                    $health = json_decode((string)$response->getBody(), true) ?: null;
                    if ($health !== null) {
                        $health['responseMs'] = (int)round((microtime(true) - $start) * 1000);
                    }
                } else {
                    $healthError = 'HTTP ' . $response->getStatusCode();
                }
            } catch (\Throwable $e) {
                $healthError = $e->getMessage();
            }
        }

        $view->assignMultiple([
            'flagOn' => file_exists(Environment::getVarPath() . '/vitec-ssr-on.flag'),
            'configured' => $this->purgeService->isConfigured(),
            'health' => $health,
            'healthError' => $healthError,
            'purgeLog' => $this->rows('tx_vitec_ssrpurgelog', 30),
            'healthLog' => $this->rows('tx_vitec_ssrhealthlog', 10),
        ]);
        return $view->renderResponse('Ssr/Index');
    }

    public function purgeAction(ServerRequestInterface $request): ResponseInterface
    {
        $body = (array)$request->getParsedBody();
        $mode = (string)($body['mode'] ?? 'paths');
        $user = (string)($GLOBALS['BE_USER']->user['username'] ?? '?');

        if ($mode === 'all') {
            $paths = ['*'];
        } else {
            $paths = preg_split('/[\s,]+/', (string)($body['paths'] ?? ''), -1, PREG_SPLIT_NO_EMPTY) ?: [];
        }

        if ($paths === []) {
            $this->flash('Keine Pfade angegeben.', 'Purge', false);
        } else {
            $result = $this->purgeService->purge($paths, 'module:' . $user);
            $this->flash(
                sprintf('HTTP %d — %s', $result['httpCode'], $result['message']),
                $result['success'] ? 'Purge erfolgreich' : 'Purge fehlgeschlagen',
                $result['success']
            );
        }
        return new RedirectResponse((string)$this->uriBuilder->buildUriFromRoute('web_vitecssr'), 303);
    }

    private function rows(string $table, int $limit): array
    {
        try {
            $qb = $this->connectionPool->getQueryBuilderForTable($table);
            return $qb->select('*')->from($table)
                ->orderBy('uid', 'DESC')->setMaxResults($limit)
                ->executeQuery()->fetchAllAssociative();
        } catch (\Throwable) {
            return [];
        }
    }

    private function flash(string $message, string $title, bool $ok): void
    {
        $flash = GeneralUtility::makeInstance(
            FlashMessage::class,
            $message,
            $title,
            $ok ? ContextualFeedbackSeverity::OK : ContextualFeedbackSeverity::ERROR,
            true
        );
        $this->flashMessageService->getMessageQueueByIdentifier()->addMessage($flash);
    }
}