TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:39 +02:00
commit e54ab24745
68 changed files with 3683 additions and 0 deletions
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+<?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\Seo\HrefLang;
+
+use TYPO3\CMS\Core\Attribute\AsEventListener;
+use TYPO3\CMS\Core\Context\Context;
+use TYPO3\CMS\Core\Context\LanguageAspectFactory;
+use TYPO3\CMS\Core\Domain\Repository\PageRepository;
+use TYPO3\CMS\Core\Http\Uri;
+use TYPO3\CMS\Core\Site\Entity\Site;
+use TYPO3\CMS\Core\Site\Entity\SiteLanguage;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
+use TYPO3\CMS\Frontend\DataProcessing\LanguageMenuProcessor;
+use TYPO3\CMS\Frontend\Event\ModifyHrefLangTagsEvent;
+
+/**
+ * Class to add the hreflang tags to the page
+ *
+ * @internal
+ */
+class HrefLangGenerator
+{
+    public function __construct(
+        protected ContentObjectRenderer $cObj,
+        protected LanguageMenuProcessor $languageMenuProcessor,
+    ) {}
+
+    #[AsEventListener('typo3-seo/hreflangGenerator')]
+    public function __invoke(ModifyHrefLangTagsEvent $event): void
+    {
+        $request = $event->getRequest();
+        $pageInformation = $request->getAttribute('frontend.page.information');
+        $pageRecord = $pageInformation->getPageRecord();
+        if ((int)$pageRecord['no_index'] === 1) {
+            return;
+        }
+        $this->cObj->setRequest($event->getRequest());
+        $languages = $this->languageMenuProcessor->process($this->cObj, [], [], []);
+        $site = $request->getAttribute('site');
+        $siteLanguage = $request->getAttribute('language', $site->getDefaultLanguage());
+        $pageId = $pageInformation->getId();
+
+        $hrefLangs = $event->getHrefLangs();
+        foreach ($languages['languagemenu'] as $language) {
+            if (!empty($language['link']) && $language['hreflang']) {
+                if ($language['languageId'] === 0) {
+                    // No need to fetch default language
+                    $page = ($pageRecord['_TRANSLATION_SOURCE'] ?? null)?->toArray(true) ?? $pageRecord;
+                } elseif ($language['languageId'] === ($pageRecord['_REQUESTED_OVERLAY_LANGUAGE'] ?? false)) {
+                    // No need to fetch current language
+                    $page = $pageRecord;
+                } else {
+                    $page = $this->getTranslatedPageRecord($pageId, $language['languageId'], $site);
+                }
+                // do not set hreflang if a page is not translated explicitly
+                if (empty($page)) {
+                    continue;
+                }
+                // do not set hreflang when canonical is set explicitly
+                if (!empty($page['canonical_link'])) {
+                    continue;
+                }
+
+                $href = $this->getAbsoluteUrl($language['link'], $siteLanguage);
+                $hrefLangs[$language['hreflang']] = $href;
+            }
+        }
+        if (count($hrefLangs) > 1) {
+            if (array_key_exists($languages['languagemenu'][0]['hreflang'], $hrefLangs)) {
+                $hrefLangs['x-default'] = $hrefLangs[$languages['languagemenu'][0]['hreflang']];
+            }
+        }
+        $event->setHrefLangs($hrefLangs);
+    }
+
+    protected function getAbsoluteUrl(string $url, SiteLanguage $siteLanguage): string
+    {
+        $uri = new Uri($url);
+        if (empty($uri->getHost())) {
+            $url = $siteLanguage->getBase()->withPath($uri->getPath());
+
+            if ($uri->getQuery()) {
+                $url = $url->withQuery($uri->getQuery());
+            }
+        }
+        return (string)$url;
+    }
+
+    protected function getTranslatedPageRecord(int $pageId, int $languageId, Site $site): array
+    {
+        $targetSiteLanguage = $site->getLanguageById($languageId);
+        $languageAspect = LanguageAspectFactory::createFromSiteLanguage($targetSiteLanguage);
+
+        $context = clone GeneralUtility::makeInstance(Context::class);
+        $context->setAspect('language', $languageAspect);
+
+        $pageRepository = GeneralUtility::makeInstance(PageRepository::class, $context);
+        $pageRecord = $pageRepository->getPage($pageId);
+        // Overlay was requested but did not apply
+        if ($languageId > 0 && !isset($pageRecord['_LOCALIZED_UID'])) {
+            return [];
+        }
+        return $pageRecord;
+    }
+}