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Viewing / Editing File: CachedCurrencies.php

<?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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