/**
* Returns an array of indexes for of matches of higher precedence than the existing pairing.
*
* @param MatchedPreferenceInterface[] $matchingList
* @param PreferenceInterface $clientPref
*
* @return int[]
*/
private function getMatchingIndexes(array $matchingList, PreferenceInterface $clientPref)
{
$matchingIndexList = array();
foreach ($matchingList as $key => $matching) {
if ($clientPref->getPrecedence() > $matching->getClientPreference()->getPrecedence()) {
$matchingIndexList[] = $key;
}
}
return $matchingIndexList;
}
/**
* Returns the first index containing a matching variant, or -1 if not present.
*
* @param MatchedPreferenceInterface[] $matchingList
* @param PreferenceInterface $pref
*
* @return int
*/
private function getMatchingIndex(array $matchingList, PreferenceInterface $pref)
{
$index = -1;
foreach ($matchingList as $key => $match) {
if ($match->getVariant() === $pref->getVariant()) {
$index = $key;
}
}
return $index;
}
/**
* Returns true if the server preference contains a partial language that matches the language in the client
* preference.
*
* e.g. An server variant of en-* would match en, en-US but not es-ES
*
* @param string $fromField
* @param MatchedPreferenceInterface $matchedPreference
* @param PreferenceInterface $newClientPref
*
* @return bool
*/
private function partialLangMatches($fromField, MatchedPreferenceInterface $matchedPreference, PreferenceInterface $newClientPref)
{
$serverPref = $matchedPreference->getServerPreference();
$oldClientPref = $matchedPreference->getClientPreference();
// Note that this only supports the simplest case of (e.g.) en-* matching en-GB and en-US, additional
// Language tags are explicitly ignored
list($clientMainLang) = explode('-', $newClientPref->getVariant());
list($serverMainLang) = explode('-', $serverPref->getVariant());
return PreferenceInterface::LANGUAGE === $fromField && PreferenceInterface::PARTIAL_WILDCARD === $serverPref->getPrecedence() && $clientMainLang == $serverMainLang && $newClientPref->getPrecedence() > $oldClientPref->getPrecedence();
}
/**
* Returns an array of indexes for of matches of higher precedence than the existing pairing.
*
* @param MatchedPreferenceInterface[] $matchingList
* @param PreferenceInterface $clientPref
*
* @return int[]
*/
private function getMatchingIndexes(array $matchingList, PreferenceInterface $clientPref)
{
$matchingIndexList = array();
foreach ($matchingList as $key => $matching) {
$serverPref = $matching->getServerPreference();
list($clientMimeType) = explode('/', $clientPref->getVariant());
list($serverMimeType) = explode('/', $serverPref->getVariant());
if ($clientMimeType == $serverMimeType && $clientPref->getPrecedence() > $matching->getClientPreference()->getPrecedence()) {
$matchingIndexList[] = $key;
}
}
return $matchingIndexList;
}
/**
* Compare precedences of preferences.
*
* @param PreferenceInterface $lValue
* @param PreferenceInterface $rValue
*
* @return int -1, 0, 1 (see usort() callback for meaning)
*/
private function comparePrecedence(PreferenceInterface $lValue, PreferenceInterface $rValue)
{
if ($rValue->getPrecedence() < $lValue->getPrecedence()) {
return -1;
} elseif ($rValue->getPrecedence() > $lValue->getPrecedence()) {
return 1;
} else {
return 0;
}
}
/**
* Returns the product of the server & client quality factors.
*
* @return float
*/
public function getQualityFactor()
{
return $this->clientPref->getQualityFactor() * $this->serverPref->getQualityFactor();
}
