LanguageCommandController.php

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<?php
namespace TYPO3\CMS\Lang\Command;

/*
 * 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!
 */

use TYPO3\CMS\Core\Cache\CacheManager;
use TYPO3\CMS\Core\Package\PackageInterface;
use TYPO3\CMS\Core\Package\PackageManager;
use TYPO3\CMS\Core\Utility\GeneralUtility;

class LanguageCommandController extends \TYPO3\CMS\Extbase\Mvc\Controller\CommandController
{
    protected $signalSlotDispatcher;

    protected $registryService;

    public function injectSignalSlotDispatcher(\TYPO3\CMS\Extbase\SignalSlot\Dispatcher $signalSlotDispatcher)
    {
        $this->signalSlotDispatcher = $signalSlotDispatcher;
    }

    public function injectRegistryService(\TYPO3\CMS\Lang\Service\RegistryService $registryService)
    {
        $this->registryService = $registryService;
    }

    public function updateCommand($localesToUpdate = '')
    {
        $translationService = $this->objectManager->get(\TYPO3\CMS\Lang\Service\TranslationService::class);
        $languageRepository = $this->objectManager->get(\TYPO3\CMS\Lang\Domain\Repository\LanguageRepository::class);
        $locales = [];
        if (!empty($localesToUpdate)) {
            $locales = GeneralUtility::trimExplode(',', $localesToUpdate, true);
        } else {
            $languages = $languageRepository->findSelected();
            foreach ($languages as $language) {
                $locales[] = $language->getLocale();
            }
        }
        $packageManager = $this->objectManager->get(\TYPO3\CMS\Core\Package\PackageManager::class);
        $this->emitPackagesMayHaveChangedSignal();
        $packages = $packageManager->getAvailablePackages();
        $this->outputLine((sprintf('Updating language packs of all activated extensions for locales "%s"', implode(', ', $locales))));
        $this->output->progressStart(count($locales) * count($packages));
        foreach ($locales as $locale) {
            foreach ($packages as $package) {
                $extensionKey = $package->getPackageKey();
                $result = $translationService->updateTranslation($extensionKey, $locale);
                if (empty($result[$extensionKey][$locale]['error'])) {
                    $this->registryService->set($locale, $GLOBALS['EXEC_TIME']);
                }
                $this->output->progressAdvance();
            }
        }
        // Flush language cache
        GeneralUtility::makeInstance(CacheManager::class)->getCache('l10n')->flush();
        $this->output->progressFinish();
    }

    protected function emitPackagesMayHaveChangedSignal()
    {
        $this->signalSlotDispatcher->dispatch('PackageManagement', 'packagesMayHaveChanged');
    }
}