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<?php |
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/** |
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* Alxarafe. Development of PHP applications in a flash! |
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* Copyright (C) 2018-2020 Alxarafe <[email protected]> |
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*/ |
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namespace Alxarafe\Core\Singletons; |
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use Symfony\Component\Finder\Finder; |
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use Symfony\Component\Translation\Loader\YamlFileLoader; |
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use Symfony\Component\Translation\Translator as SymfonyTranslator; |
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use Symfony\Component\Yaml\Exception\ParseException; |
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use Symfony\Component\Yaml\Yaml; |
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/** |
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* Class Lang, give support to internationalization. |
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* |
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* @package Alxarafe\Core\Providers |
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*/ |
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class Translator |
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{ |
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/** |
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* Default language to use if language file not exists. |
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*/ |
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public const FALLBACK_LANG = 'en'; |
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/** |
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* Base folder where languages files are stored. |
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*/ |
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public const LANG_FOLDER = DIRECTORY_SEPARATOR . 'Languages'; |
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/** |
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* Default language to use. |
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*/ |
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public const LANG = 'es_ES'; |
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/** |
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* Extension of language file. |
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*/ |
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public const EXT = '.yaml'; |
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/** |
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* Format of language file. |
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*/ |
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public const FORMAT = 'yaml'; |
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/** |
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* The Symfony translator. |
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* |
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* @var SymfonyTranslator |
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*/ |
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private static $translator; |
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/** |
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* List of used strings. |
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* |
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* @var array |
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*/ |
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private static $usedStrings; |
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/** |
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* List of strings without translation. |
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* |
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* @var array |
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*/ |
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private static $missingStrings; |
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/** |
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* Main language folder. |
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* |
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* @var string |
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*/ |
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private static $languageFolder; |
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/** |
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* Array of all language folders. |
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* |
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* @var array |
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*/ |
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private static $languageFolders; |
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/** |
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* Lang constructor. |
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*/ |
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public function __construct() |
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{ |
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$config = Config::loadConfigurationFile()['translator']['main'] ?? 'en'; |
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self::$languageFolder = constant('BASE_FOLDER') . self::LANG_FOLDER; |
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self::$translator = new SymfonyTranslator($config['language'] ?? self::FALLBACK_LANG); |
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self::$translator->setFallbackLocales([self::FALLBACK_LANG]); |
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self::$translator->addLoader(self::FORMAT, new YamlFileLoader()); |
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self::$usedStrings = []; |
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self::$missingStrings = []; |
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self::$languageFolders = []; |
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$this->loadLangFiles(); |
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} |
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/** |
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* Load the translation files following the priorities. |
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* In this case, the translator must be provided with the routes in reverse order. |
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* |
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* @return void |
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*/ |
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public static function loadLangFiles(): void |
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{ |
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$langFolders = self::getLangFolders(); |
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if (count($langFolders) === 0 || empty($langFolders[0])) { |
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die('No language folder found'); |
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} |
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$langFiles = Finder::create() |
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->files() |
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->name('*' . self::EXT) |
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->in($langFolders) |
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->sortByName(); |
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foreach ($langFiles as $langFile) { |
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$langCode = str_replace(self::EXT, '', $langFile->getRelativePathName()); |
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try { |
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Yaml::parseFile($langFile->getPathName()); |
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self::$translator->addResource(self::FORMAT, $langFile->getPathName(), $langCode); |
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} catch (ParseException $e) { |
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Logger::getInstance()::exceptionHandler($e); |
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FlashMessages::getInstance()::setError($e->getFile() . ' ' . $e->getLine() . ' ' . $e->getMessage()); |
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} |
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} |
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} |
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/** |
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* Return the lang folders. |
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* |
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* @return array |
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*/ |
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public static function getLangFolders(): array |
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{ |
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return array_merge( |
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[self::getBaseLangFolder()], |
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self::$languageFolders |
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); |
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} |
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/** |
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* Returns the base lang folder. |
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* |
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* @return string |
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*/ |
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public static function getBaseLangFolder(): string |
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{ |
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return self::$languageFolder; |
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} |
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/** |
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* Return default values |
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* |
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* @return array |
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*/ |
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public function getDefaultValues(): array |
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{ |
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return ['language' => self::FALLBACK_LANG]; |
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} |
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/** |
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* Add additional language folders. |
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* |
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* @param array $folders |
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*/ |
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public static function addDirs(array $folders = []) |
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{ |
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foreach ($folders as $key => $folder) { |
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$fullFolder = $folder . self::LANG_FOLDER; |
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// FileSystemUtils::mkdir($folders[$key], 0777, true); |
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if (file_exists($fullFolder) && is_dir($fullFolder)) { |
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$folders[$key] = $fullFolder; |
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Debug::addMessage('messages', 'Added translation folder ' . $folders[$key]); |
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} |
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} |
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self::$languageFolders = array_merge(self::$languageFolders, $folders); |
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self::loadLangFiles(); |
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} |
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/** |
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* Sets the language code in use. |
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* |
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* @param string $lang |
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* |
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* @return void |
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*/ |
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public function setlocale(string $lang): void |
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{ |
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self::$translator->setLocale($lang); |
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} |
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/** |
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* Returns an array with the languages with available translations. |
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* |
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* @return array |
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*/ |
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public function getAvailableLanguages(): array |
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{ |
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$languages = []; |
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$dir = $this->getBaseLangFolder(); |
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// FileSystemUtils::mkdir($dir, 0777, true); |
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if (file_exists($dir) && is_dir($dir)) { |
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$langFiles = Finder::create() |
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->files() |
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->name('*' . self::EXT) |
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->in($dir) |
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->sortByName(); |
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foreach ($langFiles as $langFile) { |
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$langCode = str_replace(self::EXT, '', $langFile->getRelativePathName()); |
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$languages[$langCode] = $this->trans('language-' . $langCode); |
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} |
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} |
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return $languages; |
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} |
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/** |
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* Translate the text into the default language. |
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* |
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* @param string $txt |
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* @param array $parameters |
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* @param string|null $domain |
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* @param string|null $locale |
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* |
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* @return string |
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*/ |
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public static function trans(string $txt, array $parameters = [], ?string $domain = null, ?string $locale = null): string |
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{ |
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$translated = self::$translator->trans($txt, $parameters, $domain, $locale); |
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self::verifyMissing($translated, $txt, $domain); |
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return $translated; |
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} |
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/** |
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* Stores if translation is used and if is missing. |
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* |
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* @param string $translated |
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* @param null|string $txt |
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* @param null|string $domain |
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*/ |
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private static function verifyMissing(string $translated, $txt, $domain = null) |
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{ |
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$domain = $domain ?? 'messages'; |
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$txt = (string) $txt; |
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$catalogue = self::$translator->getCatalogue(self::getLocale()); |
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while (!$catalogue->defines($txt, $domain)) { |
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if ($cat = $catalogue->getFallbackCatalogue()) { |
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$catalogue = $cat; |
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$locale = $catalogue->getLocale(); |
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if ($catalogue->has($txt, $domain) && $locale !== self::getLocale()) { |
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self::$missingStrings[$txt] = $translated; |
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} |
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} else { |
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break; |
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} |
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} |
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if (!$catalogue->has($txt, $domain)) { |
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self::$missingStrings[$txt] = $translated; |
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} |
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} |
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/** |
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* Returns the language code in use. |
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* |
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* @return string |
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*/ |
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public static function getLocale(): string |
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{ |
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return self::$translator->getLocale(); |
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} |
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/** |
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* Returns the missing strings. |
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* |
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* @return array |
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*/ |
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public function getMissingStrings(): array |
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{ |
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return self::$missingStrings; |
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} |
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/** |
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* Returns the strings used. |
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* |
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* @return array |
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*/ |
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public function getUsedStrings(): array |
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{ |
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return self::$usedStrings; |
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} |
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/** |
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* Returns the original translator. |
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* |
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* @return SymfonyTranslator |
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*/ |
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public function getTranslator(): SymfonyTranslator |
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{ |
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return self::$translator; |
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} |
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} |
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In general, usage of exit should be done with care and only when running in a scripting context like a CLI script.