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<?php |
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declare(strict_types=1); |
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namespace App\Middleware; |
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use DateInterval; |
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use Psr\Http\Message\ResponseFactoryInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Psr\Log\LoggerInterface; |
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use Yiisoft\Cookies\Cookie; |
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use Yiisoft\Http\Header; |
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use Yiisoft\Http\Status; |
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use Yiisoft\Router\UrlGeneratorInterface; |
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use Yiisoft\Session\SessionInterface; |
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use Yiisoft\Translator\TranslatorInterface; |
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final class LocaleMiddleware implements MiddlewareInterface |
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{ |
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private const DEFAULT_LOCALE = 'en'; |
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private const DEFAULT_LOCALE_NAME = 'language'; |
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private TranslatorInterface $translator; |
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private UrlGeneratorInterface $urlGenerator; |
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private SessionInterface $session; |
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private ResponseFactoryInterface $responseFactory; |
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private LoggerInterface $logger; |
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private array $locales; |
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private bool $enableSaveLocale = true; |
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private bool $enableDetectLocale = true; |
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private string $defaultLocale = self::DEFAULT_LOCALE; |
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private string $queryParameterName = self::DEFAULT_LOCALE_NAME; |
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private string $sessionName = self::DEFAULT_LOCALE_NAME; |
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private ?DateInterval $cookieDuration; |
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public function __construct( |
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TranslatorInterface $translator, |
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UrlGeneratorInterface $urlGenerator, |
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SessionInterface $session, |
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LoggerInterface $logger, |
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ResponseFactoryInterface $responseFactory, |
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array $locales = [] |
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) { |
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$this->translator = $translator; |
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$this->urlGenerator = $urlGenerator; |
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$this->session = $session; |
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$this->logger = $logger; |
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$this->responseFactory = $responseFactory; |
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$this->locales = $locales; |
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$this->cookieDuration = new DateInterval('P30D'); |
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} |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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if ($this->locales === []) { |
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return $handler->handle($request); |
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} |
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$uri = $request->getUri(); |
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$path = $uri->getPath(); |
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[$locale, $country] = $this->getLocaleFromPath($path); |
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if ($locale !== null) { |
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$length = strlen($locale); |
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$newPath = substr($path, $length + 1); |
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if ($newPath === '') { |
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$newPath = '/'; |
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} |
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$request = $request->withUri($uri->withPath($newPath)); |
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$this->translator->setLocale($locale); |
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$this->urlGenerator->setUriPrefix('/' . $locale); |
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$response = $handler->handle($request); |
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if ($this->isDefaultLocale($locale, $country)) { |
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$response = $this->responseFactory->createResponse(Status::FOUND) |
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->withHeader(Header::LOCATION, $newPath); |
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} |
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if ($this->enableSaveLocale) { |
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$response = $this->saveLocale($locale, $response); |
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} |
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return $response; |
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} |
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if ($this->enableSaveLocale) { |
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$locale = $this->getLocaleFromRequest($request); |
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} |
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if ($locale === null && $this->enableDetectLocale) { |
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// TODO: detect locale from headers |
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} |
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if ($locale === null || $this->isDefaultLocale($locale, $country)) { |
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return $handler->handle($request); |
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} |
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return $this->responseFactory->createResponse(Status::FOUND) |
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->withHeader(Header::LOCATION, '/' . $locale . rtrim($path, '/')); |
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} |
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private function getLocaleFromPath(string $path): array |
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{ |
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$parts = []; |
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foreach ($this->locales as $code => $locale) { |
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$lang = is_string($code) ? $code : $locale; |
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$parts[] = $lang; |
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} |
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$pattern = implode('|', $parts); |
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if (preg_match("#^/($pattern)\b(/?)#i", $path, $matches)) { |
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$locale = $matches[1]; |
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$country = null; |
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if (strpos($locale, '-') !== false) { |
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[$locale, $country] = explode('-', $locale, 2); |
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} |
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if (isset($this->locales[$locale])) { |
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$this->logger->info(sprintf("Locale '%s' found in URL", $locale)); |
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return [$locale, $country]; |
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} |
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} |
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return [null, null]; |
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} |
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private function getLocaleFromRequest(ServerRequestInterface $request) |
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{ |
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$cookies = $request->getCookieParams(); |
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$queryParameters = $request->getQueryParams(); |
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if (isset($cookies[$this->sessionName])) { |
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$this->logger->info(sprintf("Locale '%s' found in cookies", $cookies[$this->sessionName])); |
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return $cookies[$this->sessionName]; |
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} |
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if (isset($queryParameters[$this->queryParameterName])) { |
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$this->logger->info( |
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sprintf("Locale '%s' found in query string", $queryParameters[$this->queryParameterName]) |
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); |
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return $queryParameters[$this->queryParameterName]; |
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} |
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return null; |
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} |
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private function isDefaultLocale(string $locale, ?string $country): bool |
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{ |
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return $locale === $this->defaultLocale || ($country !== null && $this->defaultLocale === "$locale-$country"); |
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} |
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private function detectLocale(ServerRequestInterface $request) |
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{ |
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} |
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private function saveLocale(string $locale, ResponseInterface $response): ResponseInterface |
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{ |
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$this->logger->info('Saving found locale to cookies'); |
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$this->session->set($this->sessionName, $locale); |
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$cookie = (new Cookie($this->sessionName, $locale)); |
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if ($this->cookieDuration !== null) { |
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$cookie = $cookie->withMaxAge($this->cookieDuration); |
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} |
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return $cookie->addToResponse($response); |
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} |
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} |
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yiisoft /
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