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cms-backend/Classes/Service/PageLanguageInformationService.php
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PHP

<?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\Backend\Service;
use Symfony\Component\DependencyInjection\Attribute\Autowire;
use TYPO3\CMS\Backend\Domain\Model\Language\LanguageItem;
use TYPO3\CMS\Backend\Domain\Model\Language\LanguageStatus;
use TYPO3\CMS\Backend\Domain\Model\Language\PageLanguageInformation;
use TYPO3\CMS\Backend\Utility\BackendUtility;
use TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
use TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
use TYPO3\CMS\Core\Database\Connection;
use TYPO3\CMS\Core\Database\ConnectionPool;
use TYPO3\CMS\Core\Database\Query\Restriction\DeletedRestriction;
use TYPO3\CMS\Core\Database\Query\Restriction\WorkspaceRestriction;
use TYPO3\CMS\Core\Schema\Capability\TcaSchemaCapability;
use TYPO3\CMS\Core\Schema\TcaSchemaFactory;
use TYPO3\CMS\Core\Site\Entity\NullSite;
use TYPO3\CMS\Core\Site\Entity\Site;
use TYPO3\CMS\Core\Site\Entity\SiteInterface;
use TYPO3\CMS\Core\Type\Bitmask\Permission;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Core\Versioning\VersionState;
/**
* Central service for gathering page language information.
*
* This service provides the SINGLE source of truth for:
* - Which languages exist (have translations)
* - Which languages can be created (permissions + missing)
* - Which languages are unavailable (no permission)
* - Translation records with workspace overlay
* - UI properties (labels, flags, icons)
*
* Note: Languages marked as "Unavailable" are included in the result
* for potential future use (e.g., showing "No Access" indicators),
* but controllers currently filter them out before displaying the UI.
*
* @internal
*/
final readonly class PageLanguageInformationService
{
public function __construct(
private TcaSchemaFactory $tcaSchemaFactory,
private ConnectionPool $connectionPool,
#[Autowire(service: 'cache.runtime')]
private FrontendInterface $runtimeCache,
) {}
/**
* Get complete language information for a page.
*
* This method fetches and analyzes all language-related data for a page,
* including existing translations, permissions, and available languages.
*/
public function getLanguageInformationForPage(
int $pageId,
SiteInterface $site,
BackendUserAuthentication $backendUser
): PageLanguageInformation {
// Build cache key: page ID + workspace + user ID (for permissions)
$cacheKey = $this->getCacheKeyForPage($pageId, $backendUser);
// Check runtime cache
$cachedInfo = $this->runtimeCache->get($cacheKey);
if ($cachedInfo instanceof PageLanguageInformation) {
return $cachedInfo;
}
// Get ALL enabled languages (without permission filtering)
// We need to do permission checks ourselves to properly classify as Unavailable
if ($site instanceof Site) {
// For Site we use getAllLanguages(), because getLanguages() would remove "disabled" languages
$allLanguages = $site->getAllLanguages();
} else {
$allLanguages = $site->getLanguages();
}
// For NullSite (page 0), respect mod.SHARED.disableLanguages TSconfig
$disabledLanguages = [];
if ($site instanceof NullSite) {
$pageTs = BackendUtility::getPagesTSconfig($pageId);
$pageTs = $pageTs['mod.']['SHARED.'] ?? [];
$disabledLanguages = GeneralUtility::intExplode(',', (string)($pageTs['disableLanguages'] ?? ''), true);
}
$existingTranslations = $this->fetchExistingTranslations($pageId, $backendUser);
$canUserCreateTranslations = $this->canUserCreatePageTranslations($backendUser, $pageId);
$availableLanguages = [];
$languageStatuses = [];
$creatableLanguageIds = [];
foreach ($allLanguages as $siteLanguage) {
$languageId = $siteLanguage->getLanguageId();
if (in_array($languageId, $disabledLanguages, true)) {
// For NullSite: skip languages disabled via TSconfig
continue;
}
// Check if user has access to this specific language
if (!$backendUser->checkLanguageAccess($languageId)) {
// Language exists in site config but user has no access
$languageStatuses[$languageId] = LanguageStatus::Unavailable;
// Include in availableLanguages for potential future use (e.g., "No Access" indicators)
// Note: Controllers currently filter out Unavailable languages before display
$availableLanguages[$languageId] = $siteLanguage;
continue;
}
// User has access to this language
$availableLanguages[$languageId] = $siteLanguage;
if ($languageId === 0 || isset($existingTranslations[$languageId])) {
// Default language or existing translation
$languageStatuses[$languageId] = LanguageStatus::Existing;
} elseif ($canUserCreateTranslations) {
// Can be created (user has page edit permission AND language access)
$languageStatuses[$languageId] = LanguageStatus::Creatable;
$creatableLanguageIds[] = $languageId;
} else {
// Cannot be created (no page edit permission, but has language access)
$languageStatuses[$languageId] = LanguageStatus::Unavailable;
}
}
// Filter existingTranslations to only include languages that are available.
// This ensures consistency: a language with a translation in the database but whose
// language does not exist in site configuration should not appear as "existing" in the UI.
$existingTranslations = array_intersect_key($existingTranslations, $availableLanguages);
$languageInformation = new PageLanguageInformation(
pageId: $pageId,
availableLanguages: $availableLanguages,
languageStatuses: $languageStatuses,
existingTranslations: $existingTranslations,
creatableLanguageIds: $creatableLanguageIds,
canUserCreateTranslations: $canUserCreateTranslations,
languageItems: $this->getLanguageItems($languageStatuses, $availableLanguages),
);
// Store in runtime cache for this request
$this->runtimeCache->set($cacheKey, $languageInformation);
return $languageInformation;
}
/**
* Get language items ready for UI rendering. Includes all UI properties (labels, flags, etc.)
*
* @return LanguageItem[] Array of language items
*/
private function getLanguageItems(array $languageStatuses, array $availableLanguages): array
{
$languageItems = [];
foreach ($availableLanguages as $siteLanguage) {
$languageId = $siteLanguage->getLanguageId();
$languageItems[] = new LanguageItem(
siteLanguage: $siteLanguage,
status: $languageStatuses[$languageId] ?? LanguageStatus::Unavailable,
);
}
return $languageItems;
}
/**
* Fetch existing page translations with workspace overlay.
*
* This is the centralized logic that was previously duplicated across
* PageLayoutController and RecordListController.
*
* @param int $pageId Page ID
* @param BackendUserAuthentication $backendUser Current backend user
* @return array<int, array> Translation records keyed by language ID
*/
private function fetchExistingTranslations(
int $pageId,
BackendUserAuthentication $backendUser
): array {
$schema = $this->tcaSchemaFactory->get('pages');
$languageCapability = $schema->getCapability(TcaSchemaCapability::Language);
$languageField = $languageCapability->getLanguageField()->getName();
$translationOriginField = $languageCapability->getTranslationOriginPointerField()->getName();
$queryBuilder = $this->connectionPool->getQueryBuilderForTable('pages');
$queryBuilder->getRestrictions()->removeAll()
->add(new DeletedRestriction())
->add(new WorkspaceRestriction($backendUser->workspace));
$queryBuilder
->select('*')
->from('pages')
->where(
$queryBuilder->expr()->eq(
$translationOriginField,
$queryBuilder->createNamedParameter($pageId, Connection::PARAM_INT)
),
$queryBuilder->expr()->neq(
$languageField,
0
)
);
$existingTranslations = [];
$statement = $queryBuilder->executeQuery();
while ($row = $statement->fetchAssociative()) {
BackendUtility::workspaceOL('pages', $row, $backendUser->workspace);
if ($row && VersionState::tryFrom($row['t3ver_state'] ?? 0) !== VersionState::DELETE_PLACEHOLDER) {
$existingTranslations[(int)$row[$languageField]] = $row;
}
}
return $existingTranslations;
}
/**
* Check if user can create page translations.
*
* @param BackendUserAuthentication $backendUser Current backend user
* @param int $pageId Page ID
* @return bool True if user can create translations
*/
private function canUserCreatePageTranslations(
BackendUserAuthentication $backendUser,
int $pageId
): bool {
// Check table permission
if (!$backendUser->check('tables_modify', 'pages')) {
return false;
}
// Check page permission
$pageInfo = BackendUtility::readPageAccess($pageId, $backendUser->getPagePermsClause(Permission::PAGE_SHOW));
if (!$pageInfo) {
return false;
}
return $backendUser->doesUserHaveAccess($pageInfo, Permission::PAGE_EDIT);
}
private function getCacheKeyForPage(int $pageId, BackendUserAuthentication $backendUser): string
{
return 'PageLanguageInformation_' . $pageId . '_' . $backendUser->workspace . '_' . $backendUser->getUserId();
}
}