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<?php declare(strict_types=1); namespace Money\Currencies; use ArrayIterator; use Cache\TagInterop\TaggableCacheItemInterface; use CallbackFilterIterator; use Money\Currencies; use Money\Currency; use Psr\Cache\CacheItemPoolInterface; use Traversable; use function iterator_to_array; /** * Cache the result of currency checking. */ final class CachedCurrencies implements Currencies { public function __construct(private readonly Currencies $currencies, private readonly CacheItemPoolInterface $pool) { } public function contains(Currency $currency): bool { $item = $this->pool->getItem('currency|availability|' . $currency->getCode()); if ($item->isHit() === false) { $item->set($this->currencies->contains($currency)); if ($item instanceof TaggableCacheItemInterface) { $item->setTags(['currency.availability']); } $this->pool->save($item); } return (bool) $item->get(); } public function subunitFor(Currency $currency): int { $item = $this->pool->getItem('currency|subunit|' . $currency->getCode()); if ($item->isHit() === false) { $item->set($this->currencies->subunitFor($currency)); if ($item instanceof TaggableCacheItemInterface) { $item->setTags(['currency.subunit']); } $this->pool->save($item); } return (int) $item->get(); } /** {@inheritDoc} */ public function getIterator(): Traversable { return new CallbackFilterIterator( new ArrayIterator(iterator_to_array($this->currencies->getIterator())), function (Currency $currency): bool { $item = $this->pool->getItem('currency|availability|' . $currency->getCode()); $item->set(true); if ($item instanceof TaggableCacheItemInterface) { $item->setTags(['currency.availability']); } $this->pool->save($item); return true; } ); } }
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