/**
* Returns the best value of a header.
*
* @param string $accept The header to negotiate
* @param AbstractNegotiator $negotiator
* @param array $priorities
*
* @return string|null
*/
private function negotiateHeader($accept, AbstractNegotiator $negotiator, array $priorities)
{
if (empty($accept) || empty($priorities)) {
return;
}
try {
$best = $negotiator->getBest($accept, $priorities);
} catch (\Exception $exception) {
return;
}
if ($best) {
return $best->getValue();
}
}
