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<?php namespace Money\Currencies; use Cache\Taggable\TaggableItemInterface; use Money\Currencies; use Money\Currency; use Psr\Cache\CacheItemPoolInterface; /** * Cache the result of currency checking. * * @author Márk Sági-Kazár <[email protected]> */ final class CachedCurrencies implements Currencies { /** * @var Currencies */ private $currencies; /** * @var CacheItemPoolInterface */ private $pool; /** * @param Currencies $currencies * @param CacheItemPoolInterface $pool */ public function __construct(Currencies $currencies, CacheItemPoolInterface $pool) { $this->currencies = $currencies; $this->pool = $pool; } /** * {@inheritdoc} */ public function contains(Currency $currency) { $item = $this->pool->getItem('currency|availability|'.$currency->getCode()); if (false === $item->isHit()) { $item->set($this->currencies->contains($currency)); if ($item instanceof TaggableItemInterface) { $item->addTag('currency.availability'); } $this->pool->save($item); } return $item->get(); } /** * {@inheritdoc} */ public function subunitFor(Currency $currency) { $item = $this->pool->getItem('currency|subunit|'.$currency->getCode()); if (false === $item->isHit()) { $item->set($this->currencies->subunitFor($currency)); if ($item instanceof TaggableItemInterface) { $item->addTag('currency.subunit'); } $this->pool->save($item); } return $item->get(); } /** * {@inheritdoc} */ public function getIterator() { return new \CallbackFilterIterator( $this->currencies->getIterator(), function (Currency $currency) { $item = $this->pool->getItem('currency|availability|'.$currency->getCode()); $item->set(true); if ($item instanceof TaggableItemInterface) { $item->addTag('currency.availability'); } $this->pool->save($item); return true; } ); } }