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ModifyHrefLangEventListener.php
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ModifyHrefLangEventListener.php
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<?php
declare(strict_types=1);
namespace GeorgRinger\NewsSeo\EventListener;
/**
* This file is part of the "news_seo" Extension for TYPO3 CMS.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*/
use GeorgRinger\News\Seo\NewsAvailability;
use GeorgRinger\NewsSeo\Utility\FetchUtility;
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\Information\Typo3Version;
use TYPO3\CMS\Core\Site\Entity\SiteInterface;
use TYPO3\CMS\Core\Site\Entity\SiteLanguage;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
use TYPO3\CMS\Frontend\DataProcessing\LanguageMenuProcessor;
use TYPO3\CMS\Frontend\Event\ModifyHrefLangTagsEvent;
class ModifyHrefLangEventListener
{
/** @var ContentObjectRenderer */
public $cObj;
/** @var LanguageMenuProcessor */
protected $languageMenuProcessor;
public function __construct(ContentObjectRenderer $cObj, LanguageMenuProcessor $languageMenuProcessor)
{
$this->cObj = $cObj;
$this->languageMenuProcessor = $languageMenuProcessor;
}
public function __invoke(ModifyHrefLangTagsEvent $event): void
{
if ((int)$this->getTypoScriptFrontendController()->page['no_index'] === 0) {
return;
}
$newsAvailabilityChecker = GeneralUtility::makeInstance(NewsAvailability::class);
$newsId = $newsAvailabilityChecker->getNewsIdFromRequest();
if ($newsId > 0) {
if (FetchUtility::isNoIndex($newsId)) {
return;
}
if (GeneralUtility::makeInstance(Typo3Version::class)->getMajorVersion() > 10) {
$this->cObj->setRequest($event->getRequest());
}
$languages = $this->languageMenuProcessor->process($this->cObj, [], [], []);
$site = $this->getTypoScriptFrontendController()->getSite();
$siteLanguage = $this->getTypoScriptFrontendController()->getLanguage();
$pageId = (int)$this->getTypoScriptFrontendController()->id;
$allHrefLangs = [];
foreach ($languages['languagemenu'] as $language) {
if (!empty($language['link']) && $language['hreflang']) {
$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);
$allHrefLangs[$language['hreflang']] = $href;
}
}
if (count($allHrefLangs) > 1) {
if (array_key_exists($languages['languagemenu'][0]['hreflang'], $allHrefLangs)) {
$allHrefLangs['x-default'] = $allHrefLangs[$languages['languagemenu'][0]['hreflang']];
}
}
$languages = $this->languageMenuProcessor->process($this->cObj, [], [], []);
$errorTriggered = false;
foreach ($languages['languagemenu'] as $language) {
$hreflangKey = $language['hreflang'];
// skip all languages which are not used in hreflang
if (!isset($allHrefLangs[$hreflangKey]) || $hreflangKey === 'x-default') {
continue;
}
try {
$check = $newsAvailabilityChecker->check($language['languageId']);
if (!$check) {
unset($allHrefLangs[$hreflangKey]);
}
} catch (\UnexpectedValueException $e) {
$errorTriggered = true;
}
}
if (!$errorTriggered) {
if (count($allHrefLangs) <= 2) {
unset($allHrefLangs['x-default']);
}
$event->setHrefLangs($allHrefLangs);
}
}
}
protected function getTranslatedPageRecord(int $pageId, int $languageId, SiteInterface $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, $context);
if ($languageId > 0) {
return $pageRepository->getPageOverlay($pageId, $languageId);
}
return $pageRepository->getPage($pageId);
}
/**
* @param string $url
* @param SiteLanguage $siteLanguage
* @return string
*/
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 getTypoScriptFrontendController(): TypoScriptFrontendController
{
return $GLOBALS['TYPO3_REQUEST']->getAttribute('frontend.controller', $GLOBALS['TSFE']);
}
}