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<?php |
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namespace Negotiation; |
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use Negotiation\Exception\InvalidArgument; |
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use Negotiation\Exception\InvalidHeader; |
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abstract class AbstractNegotiator |
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{ |
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/** |
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* @param string $header A string containing an `Accept|Accept-*` header. |
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* @param array $priorities A set of server priorities. |
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* |
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* @return AcceptHeader|null best matching type |
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*/ |
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public function getBest($header, array $priorities) |
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{ |
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if (empty($priorities)) { |
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1 |
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throw new InvalidArgument('A set of server priorities should be given.'); |
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} |
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if (!$header) { |
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throw new InvalidArgument('The header string should not be empty.'); |
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} |
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// Once upon a time, two `array_map` calls were sitting there, but for |
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// some reasons, they triggered `E_WARNING` time to time (because of |
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// PHP bug [55416](https://bugs.php.net/bug.php?id=55416). Now, they |
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// are gone. |
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// See: https://github.com/willdurand/Negotiation/issues/81 |
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$acceptedHeaders = array(); |
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foreach ($this->parseHeader($header) as $h) { |
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try { |
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$acceptedHeaders[] = $this->acceptFactory($h); |
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} catch (Exception\Exception $e) { |
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// silently skip in case of invalid headers coming in from a client |
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} |
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} |
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$acceptedPriorities = array(); |
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foreach ($priorities as $p) { |
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$acceptedPriorities[] = $this->acceptFactory($p); |
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} |
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$matches = $this->findMatches($acceptedHeaders, $acceptedPriorities); |
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54 |
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$specificMatches = array_reduce($matches, 'Negotiation\Match::reduce', []); |
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usort($specificMatches, 'Negotiation\Match::compare'); |
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54 |
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$match = array_shift($specificMatches); |
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return null === $match ? null : $acceptedPriorities[$match->index]; |
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} |
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/** |
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* @param string $header accept header part or server priority |
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* |
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* @return AcceptHeader Parsed header object |
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*/ |
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abstract protected function acceptFactory($header); |
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/** |
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* @param AcceptHeader $header |
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* @param AcceptHeader $priority |
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* @param integer $index |
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* |
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* @return Match|null Headers matched |
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*/ |
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protected function match(AcceptHeader $header, AcceptHeader $priority, $index) |
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{ |
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$ac = $header->getType(); |
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$pc = $priority->getType(); |
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72
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$equal = !strcasecmp($ac, $pc); |
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if ($equal || $ac === '*') { |
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$score = 1 * $equal; |
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return new Match($header->getQuality(), $score, $index); |
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} |
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return null; |
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} |
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/** |
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* @param string $header A string that contains an `Accept*` header. |
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* |
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* @return AcceptHeader[] |
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*/ |
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private function parseHeader($header) |
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{ |
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$res = preg_match_all('/(?:[^,"]*+(?:"[^"]*+")?)+[^,"]*+/', $header, $matches); |
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if (!$res) { |
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throw new InvalidHeader(sprintf('Failed to parse accept header: "%s"', $header)); |
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} |
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return array_values(array_filter(array_map('trim', $matches[0]))); |
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} |
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/** |
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* @param AcceptHeader[] $headerParts |
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* @param Priority[] $priorities Configured priorities |
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* |
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* @return Match[] Headers matched |
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*/ |
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57 |
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private function findMatches(array $headerParts, array $priorities) |
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{ |
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$matches = []; |
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57 |
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foreach ($priorities as $index => $p) { |
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57 |
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foreach ($headerParts as $h) { |
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if (null !== $match = $this->match($h, $p, $index)) { |
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$matches[] = $match; |
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} |
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} |
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} |
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return $matches; |
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} |
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} |
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willdurand /
Negotiation
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: