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   1  <?php
   2  
   3  namespace Negotiation;
   4  
   5  class LanguageNegotiator extends AbstractNegotiator
   6  {
   7      /**
   8       * {@inheritdoc}
   9       */
  10      protected function acceptFactory($accept)
  11      {
  12          return new AcceptLanguage($accept);
  13      }
  14  
  15      /**
  16       * {@inheritdoc}
  17       */
  18      protected function match(AcceptHeader $acceptLanguage, AcceptHeader $priority, $index)
  19      {
  20          if (!$acceptLanguage instanceof AcceptLanguage || !$priority instanceof AcceptLanguage) {
  21              return null;
  22          }
  23  
  24          $ab = $acceptLanguage->getBasePart();
  25          $pb = $priority->getBasePart();
  26  
  27          $as = $acceptLanguage->getSubPart();
  28          $ps = $priority->getSubPart();
  29  
  30          $baseEqual = !strcasecmp((string)$ab, (string)$pb);
  31          $subEqual  = !strcasecmp((string)$as, (string)$ps);
  32  
  33          if (($ab == '*' || $baseEqual) && ($as === null || $subEqual || null === $ps)) {
  34              $score = 10 * $baseEqual + $subEqual;
  35  
  36              return new AcceptMatch($acceptLanguage->getQuality() * $priority->getQuality(), $score, $index);
  37          }
  38  
  39          return null;
  40      }
  41  }