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<?php |
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namespace Jasny\Controller; |
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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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/** |
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* Get request, set for controller |
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* |
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* @return ServerRequestInterface |
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*/ |
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abstract public function getRequest(); |
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/** |
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* Pick best content type |
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* |
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* @param array $priorities |
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* @return string |
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*/ |
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public function negotiateContentType(array $priorities) |
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{ |
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return $this->negotiate($priorities); |
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} |
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/** |
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* Pick best language |
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* |
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* @param array $priorities |
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* @return string |
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*/ |
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public function negotiateLanguage(array $priorities) |
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{ |
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return $this->negotiate($priorities, 'language'); |
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} |
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/** |
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* Pick best encoding |
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* |
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* @param array $priorities |
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* @return string |
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*/ |
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public function negotiateEncoding(array $priorities) |
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{ |
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return $this->negotiate($priorities, 'encoding'); |
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} |
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/** |
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* Pick best charset |
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* |
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* @param array $priorities |
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* @return string |
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*/ |
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public function negotiateCharset(array $priorities) |
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{ |
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return $this->negotiate($priorities, 'charset'); |
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} |
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/** |
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* Generalize negotiation |
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* |
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* @param array $priorities |
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* @param string $type Negotiator type |
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* @return string |
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*/ |
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protected function negotiate(array $priorities, $type = '') |
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{ |
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$header = 'Accept'; |
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if ($type) { |
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$header .= '-' . ucfirst($type); |
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} |
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$header = $this->getRequest()->getHeader($header); |
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$header = join(', ', $header); |
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$negotiator = $this->getNegotiator($type); |
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$chosen = $negotiator->getBest($header, $priorities); |
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return $chosen ? $chosen->getType() : ''; |
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} |
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/** |
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* Get negotiation library instance |
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* |
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* @param string $type Negotiator type |
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* @return Negotiation\AbstractNegotiator |
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*/ |
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protected function getNegotiator($type = '') |
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{ |
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$class = $this->getNegotiatorName($type); |
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return new $class(); |
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} |
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/** |
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* Get negotiator name |
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* |
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* @param string $type |
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* @return string |
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*/ |
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protected function getNegotiatorName($type = '') |
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{ |
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return 'Negotiation\\' . ucfirst($type) . 'Negotiator'; |
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} |
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} |
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jasny /
controller
