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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of BiuradPHP opensource projects. |
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* |
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* PHP version 7.1 and above required |
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* |
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* @author Divine Niiquaye Ibok <[email protected]> |
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* @copyright 2019 Biurad Group (https://biurad.com/) |
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* @license https://opensource.org/licenses/BSD-3-Clause License |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Biurad\Cache; |
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use Biurad\Cache\Exceptions\InvalidArgumentException; |
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use DateInterval; |
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use DateTime; |
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use DateTimeInterface; |
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use Psr\Cache\CacheItemInterface; |
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final class CacheItem implements CacheItemInterface |
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{ |
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/** |
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* Reserved characters that cannot be used in a key or tag. |
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*/ |
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public const RESERVED_CHARACTERS = '{}()/\@:'; |
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/** @var string */ |
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private $key; |
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/** @var mixed */ |
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private $value; |
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/** @var bool */ |
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private $isHit = false; |
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/** @var null|float|int */ |
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private $expiry; |
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/** @var int */ |
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private $defaultLifetime; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getKey(): string |
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{ |
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return $this->key; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function get() |
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{ |
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return $this->value; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isHit(): bool |
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{ |
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return $this->isHit; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function set($value) |
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{ |
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$this->value = $value; |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function expiresAt($expiration) |
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{ |
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if (null === $expiration) { |
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return $this->setDefaultExpiration(); |
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} |
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if (!$expiration instanceof DateTimeInterface) { |
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throw new InvalidArgumentException('Expiration date must implement DateTimeInterface or be null.'); |
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} |
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$this->expiry = (float) $expiration->format('U.u'); |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function expiresAfter($time) |
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{ |
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if (null === $time) { |
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return $this->setDefaultExpiration(); |
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} |
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if ($time instanceof DateInterval) { |
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$interval = DateTime::createFromFormat('U', '0')->add($time); |
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$this->expiry = \microtime(true) + (int) $interval->format('U.u'); |
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} elseif (\is_int($time)) { |
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$this->expiry = $time + \microtime(true); |
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} else { |
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throw new InvalidArgumentException('Expiration date must be an integer, a DateInterval or null.'); |
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} |
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return $this; |
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} |
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/** |
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* Validates a cache key according to PSR-6 and PSR-16. |
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* |
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* @param string $key The key to validate |
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* |
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* @throws InvalidArgumentException When $key is not valid |
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* |
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* @return string |
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*/ |
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public static function validateKey($key): string |
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{ |
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if (!\is_string($key)) { |
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throw new InvalidArgumentException('Cache key must be string.'); |
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} |
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if ('' === $key) { |
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throw new InvalidArgumentException('Cache key length must be greater than zero.'); |
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} |
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if (false !== \strpbrk($key, self::RESERVED_CHARACTERS)) { |
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throw new InvalidArgumentException( |
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\sprintf('Cache key "%s" contains reserved characters "%s".', $key, self::RESERVED_CHARACTERS) |
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); |
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} |
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return $key; |
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} |
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/** |
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* @return static |
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*/ |
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private function setDefaultExpiration(): self |
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{ |
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$this->expiry = $this->defaultLifetime > 0 ? \microtime(true) + $this->defaultLifetime : null; |
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return $this; |
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} |
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} |
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biurad /
php-cache
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