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<?php |
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/** |
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* @copyright (c) 2006-present brian ridley |
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* @author brian ridley <[email protected]> |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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namespace ptlis\ConNeg\Negotiator\Matcher; |
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use ptlis\ConNeg\Preference\Matched\MatchedPreference; |
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use ptlis\ConNeg\Preference\Matched\MatchedPreferenceInterface; |
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use ptlis\ConNeg\Preference\PreferenceInterface; |
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/** |
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* Matcher for server-provided partial languages (e.g. 'en-*'). |
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*/ |
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class PartialLanguageMatcher implements MatcherInterface |
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{ |
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/** |
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* @inheritDoc |
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*/ |
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public function hasMatch($fromField, array $matchingList, PreferenceInterface $clientPref) |
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{ |
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return count($this->getMatchingIndexes($fromField, $matchingList, $clientPref)) > 0; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function match($fromField, array $matchingList, PreferenceInterface $clientPref) |
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{ |
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$matchingIndexList = $this->getMatchingIndexes($fromField, $matchingList, $clientPref); |
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foreach ($matchingIndexList as $matchingIndex) { |
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$matchingList[$matchingIndex] = new MatchedPreference( |
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$fromField, |
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$clientPref, |
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$matchingList[$matchingIndex]->getServerPreference() |
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); |
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} |
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return $matchingList; |
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} |
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/** |
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* Returns an array of indexes for of matches of higher precedence than the existing pairing. |
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* |
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* @param string $fromField |
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* @param MatchedPreferenceInterface[] $matchingList |
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* @param PreferenceInterface $clientPref |
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* |
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* @return int[] |
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*/ |
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private function getMatchingIndexes($fromField, array $matchingList, PreferenceInterface $clientPref) |
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{ |
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$matchingIndexList = array(); |
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foreach ($matchingList as $key => $matching) { |
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if ($this->partialLangMatches($fromField, $matching, $clientPref)) { |
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$matchingIndexList[] = $key; |
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} |
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} |
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return $matchingIndexList; |
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} |
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/** |
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* Returns true if the server preference contains a partial language that matches the language in the client |
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* preference. |
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* |
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* e.g. An server variant of en-* would match en, en-US but not es-ES |
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* |
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* @param string $fromField |
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* @param MatchedPreferenceInterface $matchedPreference |
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* @param PreferenceInterface $newClientPref |
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* |
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* @return bool |
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*/ |
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private function partialLangMatches( |
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$fromField, |
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MatchedPreferenceInterface $matchedPreference, |
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PreferenceInterface $newClientPref |
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) { |
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$serverPref = $matchedPreference->getServerPreference(); |
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$oldClientPref = $matchedPreference->getClientPreference(); |
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// Note that this only supports the simplest case of (e.g.) en-* matching en-GB and en-US, additional |
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// Language tags are explicitly ignored |
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list($clientMainLang) = explode('-', $newClientPref->getVariant()); |
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list($serverMainLang) = explode('-', $serverPref->getVariant()); |
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return PreferenceInterface::LANGUAGE === $fromField |
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&& PreferenceInterface::PARTIAL_WILDCARD === $serverPref->getPrecedence() |
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&& $clientMainLang == $serverMainLang |
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&& $newClientPref->getPrecedence() > $oldClientPref->getPrecedence(); |
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} |
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} |
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ptlis /
conneg
