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<?php |
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declare(strict_types=1); |
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namespace Jasny\Controller\Traits; |
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use Negotiation\{AbstractNegotiator, Negotiator, LanguageNegotiator, EncodingNegotiator, CharsetNegotiator}; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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/** |
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* Controller methods to negotiate content |
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*/ |
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trait ContentNegotiation |
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{ |
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abstract protected function getRequest(): ServerRequestInterface; |
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abstract protected function getResponse(): ResponseInterface; |
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abstract protected function header(string $header, string|int|\Stringable $value, bool $add = false): static; |
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/** |
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* Pick the best content type |
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* |
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* @param string[] $priorities |
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* @return string |
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*/ |
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protected function negotiateContentType(array $priorities): string |
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{ |
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$contentType = $this->negotiate(new Negotiator(), 'Accept', $priorities); |
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if ($contentType !== '') { |
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$this->header('Content-Type', $contentType); |
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} |
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return $contentType; |
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} |
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/** |
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* Pick the best language and set the `Content-Language` header |
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* |
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* @param string[] $priorities |
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* @return string |
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*/ |
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protected function negotiateLanguage(array $priorities): string |
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{ |
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$language = $this->negotiate(new LanguageNegotiator(), 'Accept-Language', $priorities); |
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if ($language !== '') { |
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$this->header('Content-Language', $language); |
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} |
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return $language; |
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} |
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/** |
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* Pick the best encoding and set `Content-Encoding` header |
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* |
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* @param string[] $priorities |
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* @return string |
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*/ |
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protected function negotiateEncoding(array $priorities): string |
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{ |
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$encoding = $this->negotiate(new EncodingNegotiator(), 'Accept-Encoding', $priorities); |
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if ($encoding !== '') { |
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$this->header('Content-Encoding', $encoding); |
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} |
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return $encoding; |
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} |
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/** |
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* Pick the best charset. |
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* This method will modify the `Content-Type` header if it's set. |
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* |
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* @param string[] $priorities |
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* @return string |
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*/ |
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protected function negotiateCharset(array $priorities): string |
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{ |
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$charset = $this->negotiate(new CharsetNegotiator(), 'Accept-Charset', $priorities); |
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$contentType = $this->getResponse()->getHeaderLine('Content-Type'); |
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if ($contentType !== '') { |
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$contentType = preg_replace('/;\s*charset\s*=[^;]+/', '', $contentType) |
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. "; charset=$charset"; |
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$this->header('Content-Type', $contentType); |
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} |
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return $charset; |
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} |
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/** |
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* Generalize negotiation. |
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*/ |
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private function negotiate(AbstractNegotiator $negotiator, string $header, array $priorities): string |
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{ |
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$value = $this->getRequest()->getHeaderLine($header); |
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$chosen = $negotiator->getBest($value, $priorities); |
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return $chosen ? $chosen->getType() : ''; |
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} |
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} |
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jasny /
controller
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