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<?php declare(strict_types=1); |
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namespace Wolnosciowiec\WebProxy\Providers\Proxy; |
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use Doctrine\Common\Cache\Cache; |
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/** |
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* Adds a cache layer to the proxy providers |
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* ----------------------------------------- |
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* |
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* @codeCoverageIgnore |
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* @package Wolnosciowiec\WebProxy\Providers\Proxy |
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*/ |
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class CachedProvider implements ProxyProviderInterface |
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{ |
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const CACHE_KEY = 'wolnosciowiec.webproxy.cache'; |
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/** |
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* @var ProxyProviderInterface $provider |
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*/ |
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private $provider; |
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/** |
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* @var Cache |
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*/ |
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private $cache; |
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public function __construct(Cache $cache, ProxyProviderInterface $provider) |
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{ |
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if ($provider instanceof $this) { |
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throw new \InvalidArgumentException('Cannot cache self'); |
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} |
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$this->cache = $cache; |
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$this->provider = $provider; |
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} |
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public function collectAddresses(): array |
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{ |
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if ($this->cache->contains(self::CACHE_KEY)) { |
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$addresses = $this->getFromCache(); |
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if (!empty($addresses)) { |
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return $addresses; |
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} |
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} |
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$addresses = $this->provider->collectAddresses(); |
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$this->cacheResult($addresses); |
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return $addresses; |
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} |
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/** |
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* @return array |
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*/ |
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private function getFromCache(): array |
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{ |
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$data = unserialize($this->cache->fetch(self::CACHE_KEY)); |
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if ($data['expiration'] <= time()) { |
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return []; |
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} |
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return $data['data']; |
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} |
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private function cacheResult(array $addresses) |
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{ |
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$this->cache->save(self::CACHE_KEY, serialize([ |
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'data' => $addresses, |
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'expiration' => time() + $this->getExpirationTime(), |
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])); |
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} |
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/** |
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* @return int |
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*/ |
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protected function getExpirationTime(): int |
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{ |
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return 10 * 60; |
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} |
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} |
Wolnosciowiec /
webproxy
