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<?php |
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declare(strict_types=1); |
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namespace Chubbyphp\ApiHttp\Negotiation; |
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use Psr\Http\Message\ServerRequestInterface as Request; |
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/** |
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* @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4 |
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*/ |
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final class AcceptLanguageNegotiator implements NegotiatorInterface |
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{ |
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/** |
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* @var array |
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*/ |
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private $supportedLocales; |
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/** |
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* @param array $supportedLocales |
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*/ |
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public function __construct(array $supportedLocales) |
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{ |
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$this->supportedLocales = $supportedLocales; |
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} |
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/** |
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* @param Request $request |
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* |
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* @return NegotiatedValue|null |
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*/ |
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public function negotiate(Request $request) |
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{ |
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if ([] === $this->supportedLocales) { |
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return null; |
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} |
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if (!$request->hasHeader('Accept-Language')) { |
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return null; |
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} |
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$aggregatedValues = $this->aggregatedValues($request->getHeaderLine('Accept-Language')); |
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return $this->compareAgainstSupportedLocales($aggregatedValues); |
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} |
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/** |
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* @param string $header |
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* |
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* @return array |
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*/ |
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View Code Duplication |
private function aggregatedValues(string $header): array |
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{ |
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$values = []; |
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foreach (explode(',', $header) as $headerValue) { |
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$headerValueParts = explode(';', $headerValue); |
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$locale = trim(array_shift($headerValueParts)); |
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$attributes = []; |
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foreach ($headerValueParts as $attribute) { |
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list($attributeKey, $attributeValue) = explode('=', $attribute); |
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$attributes[trim($attributeKey)] = trim($attributeValue); |
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} |
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if (!isset($attributes['q'])) { |
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$attributes['q'] = '1.0'; |
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} |
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$values[$locale] = $attributes; |
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} |
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uasort($values, function (array $a, array $b) { |
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return $b['q'] <=> $a['q']; |
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}); |
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return $values; |
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} |
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/** |
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* @param array $aggregatedValues |
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* |
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* @return NegotiatedValue|null |
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*/ |
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private function compareAgainstSupportedLocales(array $aggregatedValues) |
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{ |
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foreach ($aggregatedValues as $locale => $attributes) { |
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if ('*' === $locale) { |
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return new NegotiatedValue(reset($this->supportedLocales), $attributes); |
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} |
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if (in_array($locale, $this->supportedLocales, true)) { |
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return new NegotiatedValue($locale, $attributes); |
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} |
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} |
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return null; |
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} |
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} |
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chubbyphp /
chubbyphp-api-http
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.