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<?php |
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declare(strict_types=1); |
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namespace Nexendrie\Translation\Resolvers; |
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use Nexendrie\Translation\ILoader; |
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use Nette\Http\IRequest; |
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use Nexendrie\Translation\LoaderNotSetException; |
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use Nette\Http\RequestFactory; |
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use Nexendrie\Translation\ILoaderAwareLocaleResolver; |
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/** |
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* HeaderLocaleResolver |
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* |
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* @author Jakub Konečný |
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*/ |
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final class HeaderLocaleResolver implements ILoaderAwareLocaleResolver { |
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use \Nette\SmartObject; |
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private ?ILoader $loader = null; |
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private IRequest $request; |
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public function __construct(IRequest $request = null) { |
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if($request === null) { |
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$request = (new RequestFactory())->fromGlobals(); |
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} |
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$this->request = $request; |
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} |
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public function setLoader(ILoader $loader): void { |
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$this->loader = $loader; |
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} |
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/** |
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* Resolve language |
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* |
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* Taken from Nette\Http\Request::detectLanguage() |
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* @author David Grudl |
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*/ |
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public function resolve(): ?string { |
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if($this->loader === null) { |
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throw new LoaderNotSetException("Loader is not available, cannot detect possible languages."); |
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} |
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$header = $this->request->getHeader("Accept-Language"); |
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$langs = $this->loader->getAvailableLanguages(); |
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if($header === null) { |
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return null; |
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} |
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$s = strtolower($header); // case insensitive |
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$s = strtr($s, '_', '-'); // cs_CZ means cs-CZ |
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rsort($langs); // first more specific |
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$pattern = ')(?:-[^\s,;=]+)?\s*(?:;\s*q=([0-9.]+))?#'; |
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preg_match_all('#(' . implode('|', $langs) . $pattern, $s, $matches); |
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if(!isset($matches[0])) { |
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return null; |
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} |
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$max = 0; |
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$lang = null; |
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foreach($matches[1] as $key => $value) { |
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$q = ($matches[2][$key] === '') ? 1.0 : (float) $matches[2][$key]; |
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if($q > $max) { |
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$max = $q; |
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$lang = $value; |
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} |
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} |
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return $lang; |
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} |
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} |
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?> |
nexendrie /
translation
