Created
September 17, 2019 12:18
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Allow fallbacks for hreflang in TYPO3 9
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<?php | |
$GLOBALS['TYPO3_CONF_VARS']['SYS']['Objects'][\TYPO3\CMS\Seo\HrefLang\HrefLangGenerator::class] = [ | |
'className' => \JosefGlatz\Theme\Xclass\HrefLangGeneratorXclass::class, | |
]; |
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<?php | |
declare(strict_types=1); | |
namespace JosefGlatz\Theme\Xclass; | |
use JosefGlatz\Theme\Service\LanguageAvailability; | |
use TYPO3\CMS\Core\Site\Entity\Site; | |
use TYPO3\CMS\Core\Utility\GeneralUtility; | |
use TYPO3\CMS\Frontend\DataProcessing\LanguageMenuProcessor; | |
use TYPO3\CMS\Seo\HrefLang\HrefLangGenerator; | |
class HrefLangGeneratorXclass extends HrefLangGenerator { | |
public function generate(): string | |
{ | |
$hreflangs = []; | |
if ((int)$this->typoScriptFrontendController->page['no_index'] === 1) { | |
return ''; | |
} | |
if ($this->request->getAttribute('site') instanceof Site) { | |
$languageMenu = GeneralUtility::makeInstance(LanguageMenuProcessor::class); | |
$languages = $languageMenu->process($this->cObj, [], [], []); | |
foreach ($languages['languagemenu'] as $language) { | |
if (LanguageAvailability::checkLanguageAvailability($language) && !empty($language['link'])) { | |
$href = $this->getAbsoluteUrl($language['link']); | |
$hreflangs[] = | |
'<link rel="alternate" hreflang="' . htmlspecialchars($language['hreflang']) . '" href="' . htmlspecialchars($href) . '"/>'; | |
} | |
} | |
if (count($hreflangs) > 1) { | |
$href = $this->getAbsoluteUrl($languages['languagemenu'][0]['link']); | |
$hreflangs[] = | |
'<link rel="alternate" hreflang="x-default" href="' . htmlspecialchars($href) . '"/>' . LF; | |
$this->getTypoScriptFrontendController()->additionalHeaderData[] = implode(LF, $hreflangs); | |
} | |
} | |
return implode(LF, $hreflangs); | |
} | |
} |
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<?php | |
declare(strict_types=1); | |
namespace JosefGlatz\Theme\Service; | |
use Psr\Http\Message\ServerRequestInterface; | |
use TYPO3\CMS\Core\Database\ConnectionPool; | |
use TYPO3\CMS\Core\Site\Entity\Site; | |
use TYPO3\CMS\Core\Site\Entity\SiteLanguage; | |
use TYPO3\CMS\Core\Utility\GeneralUtility; | |
use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController; | |
class LanguageAvailability | |
{ | |
/** | |
* @param $language | |
* @return bool | |
*/ | |
public static function checkLanguageAvailability(array $language): bool | |
{ | |
if ($language['available']) { | |
return true; | |
} | |
$currentPage = self::getTsfe()->page; | |
$currentSite = self::getCurrentSite(); | |
if ($currentSite) { | |
$languageId = $language['languageId']; | |
/** @var SiteLanguage $languageConfiguration */ | |
$languageConfiguration = $currentSite->getAllLanguages()[$languageId]; | |
// check fallbacks | |
$fallbacks = $languageConfiguration->getFallbackLanguageIds(); | |
foreach ($fallbacks as $fallbackLanguageId) { | |
if ($fallbackLanguageId === 0) { | |
return true; | |
} | |
$row = self::getTranslationOfPage($currentPage['uid'], $fallbackLanguageId); | |
if (is_array($row) && !empty($row)) { | |
return true; | |
} | |
} | |
} | |
return false; | |
} | |
protected static function getTranslationOfPage(int $pageId, int $languageId) | |
{ | |
$queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class) | |
->getQueryBuilderForTable('pages'); | |
$row = $queryBuilder | |
->select('uid', 'title', 'pid') | |
->from('pages') | |
->where( | |
$queryBuilder->expr()->eq( | |
'l10n_parent', | |
$queryBuilder->createNamedParameter($pageId, \PDO::PARAM_INT) | |
), | |
$queryBuilder->expr()->eq( | |
'sys_language_uid', | |
$queryBuilder->createNamedParameter($languageId, \PDO::PARAM_INT) | |
) | |
) | |
->execute() | |
->fetch(); | |
return $row; | |
} | |
protected static function getTsfe(): TypoScriptFrontendController | |
{ | |
return $GLOBALS['TSFE']; | |
} | |
protected static function getCurrentSite(): ?Site | |
{ | |
if ($GLOBALS['TYPO3_REQUEST'] instanceof ServerRequestInterface | |
&& $GLOBALS['TYPO3_REQUEST']->getAttribute('site') instanceof Site) { | |
return $GLOBALS['TYPO3_REQUEST']->getAttribute('site'); | |
} | |
return null; | |
} | |
} |
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