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<?php |
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namespace Yiisoft\I18n\Translator; |
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use Psr\EventDispatcher\EventDispatcherInterface; |
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use Yiisoft\I18n\Event\MissingTranslationEvent; |
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use Yiisoft\I18n\TranslatorInterface; |
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/** |
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* TODO may be it must be taken out from yiisoft/i18n? |
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*/ |
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class Translator implements TranslatorInterface |
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{ |
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/** |
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* @var \Yiisoft\I18n\Translator\TranslationsLoaderInterface |
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*/ |
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private $translationsLoader; |
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/** |
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* @var \Psr\EventDispatcher\EventDispatcherInterface |
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*/ |
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private $eventDispatcher; |
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/** |
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* @var array |
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*/ |
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private $messages = []; |
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public function __construct( |
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EventDispatcherInterface $eventDispatcher, |
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TranslationsLoaderInterface $translationsLoader |
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) { |
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$this->translationsLoader = $translationsLoader; |
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$this->eventDispatcher = $eventDispatcher; |
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} |
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/** |
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* Translates a message to the specified language. |
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* If a translation is not found, a {{@see \Yiisoft\I18n\Event\MissingTranslationEvent} event will be triggered. |
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* @param string $message the message to be translated |
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* @param string $category the message category |
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* @param string $locale the target locale |
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* @return string|null the translated message or false if translation wasn't found or isn't required |
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*/ |
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public function translate(?string $message, string $category = null, string $locale = null): ?string |
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{ |
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if ($locale === null) { |
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$locale = $this->getDefaultLocale(); |
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} |
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if ($category === null) { |
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$category = $this->getDefaultCategory(); |
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} |
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$messages = $this->getMessages($category, $locale); |
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if (array_key_exists($message, $messages)) { |
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return $messages[$message]; |
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} |
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$missingTranslation = new MissingTranslationEvent($category, $locale, $message); |
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$this->eventDispatcher->dispatch($missingTranslation); |
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if ($missingTranslation->hasFallback()) { |
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return $messages[$message] = $missingTranslation->fallback(); |
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} |
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return $messages[$message] = null; |
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} |
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private function getMessages(string $category, string $language): array |
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{ |
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$key = $language . '/' . $category; |
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if (!array_key_exists($key, $this->messages)) { |
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$this->messages[$key] = $this->translationsLoader->load($category, $language); |
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} |
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return $this->messages[$key]; |
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} |
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protected function getDefaultCategory(): string |
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{ |
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return 'default'; |
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} |
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protected function getDefaultLocale(): string |
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{ |
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return \Locale::getDefault(); |
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} |
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} |
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yiisoft /
i18n
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