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<?php |
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namespace Cmp\Cache\Infrastructure; |
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use Cmp\Cache\Domain\Cache; |
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use Cmp\Cache\Domain\Exceptions\CacheException; |
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use Cmp\Cache\Domain\Exceptions\ExpiredException; |
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use Cmp\Cache\Domain\Exceptions\NotFoundException; |
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/** |
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* Class ArrayCache |
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* |
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* A simple backend powered by an array in memory |
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* |
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* @package Cmp\Cache\Infrastureture |
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*/ |
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class ArrayCache implements Cache |
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{ |
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/** |
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* Stored items |
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* |
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* @var array |
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*/ |
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private $items = []; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function delete($key) |
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{ |
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if (array_key_exists($key, $this->items)) { |
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unset($this->items[$key]); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function set($key, $value, $timeToLive = 0) |
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{ |
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$this->items[$key] = [ |
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'value' => $value, |
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'expireTime' => $timeToLive === 0 ? $timeToLive : time() + $timeToLive, |
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]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function has($key) |
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{ |
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if (!array_key_exists($key, $this->items)) { |
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return false; |
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} |
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if ($this->hasExpired($key)) { |
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return (bool) $this->delete($key); |
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} |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function get($key) |
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{ |
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if (!array_key_exists($key, $this->items)) { |
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throw new NotFoundException($key); |
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} |
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if ($this->hasExpired($key)) { |
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$this->delete($key); |
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throw new ExpiredException($key); |
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} |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function pull($key, $default = null) |
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{ |
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try { |
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return $this->get($key); |
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} catch (CacheException $exception) { |
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return $default; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function flush() |
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{ |
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$this->items = []; |
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} |
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/** |
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* Checks whether an item as expired |
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* |
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* @param string $key |
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* |
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* @return bool |
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*/ |
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private function hasExpired($key) |
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{ |
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return $this->items[$key]['expireTime'] !== 0 && $this->items[$key]['expireTime'] < time(); |
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} |
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} |
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CMProductions /
cache
