/**
* Perform negotiation on the provided request, return a request instance with attributes containing the preferred
* types for each field handled.
*
* @param ServerRequestInterface $request
* @return ServerRequestInterface
*/
public function negotiate(ServerRequestInterface $request)
{
if ($this->charsetNeg) {
$request = $request->withAttribute(self::CHARSET_BEST, $this->negotiator->charsetBest($request->getHeaderLine('Accept'), $this->charsetAppTypes)->getType());
}
if ($this->encodingNeg) {
$request = $request->withAttribute(self::ENCODING_BEST, $this->negotiator->encodingBest($request->getHeaderLine('Accept-Encoding'), $this->encodingAppTypes)->getType());
}
if ($this->languageNeg) {
$request = $request->withAttribute(self::LANGUAGE_BEST, $this->negotiator->languageBest($request->getHeaderLine('Accept-Language'), $this->languageAppTypes)->getType());
}
if ($this->mimeNeg) {
$request = $request->withAttribute(self::MIME_BEST, $this->negotiator->mimeBest($request->getHeaderLine('Accept'), $this->mimeAppTypes)->getType());
}
return $request;
}
/**
* Return the best matching mime type.
*
* @param $appTypes
*
* @return TypePairInterface
*/
public function mimeBest($appTypes)
{
$request = $this->requestStack->getCurrentRequest();
$uaField = $request->server->get('HTTP_ACCEPT', '');
return $this->negotiate->mimeBest($uaField, $appTypes);
}