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Mini Shell
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Cache;
use Psr\Log\LoggerInterface;
use Symfony\Component\Cache\Exception\InvalidArgumentException;
use Symfony\Component\Cache\Exception\LogicException;
use Symfony\Contracts\Cache\ItemInterface;
/**
* @author Nicolas Grekas <p@tchwork.com>
*/
final class CacheItem implements ItemInterface
{
private const METADATA_EXPIRY_OFFSET = 1527506807;
private const VALUE_WRAPPER = "\xA9";
protected string $key;
protected mixed $value = null;
protected bool $isHit = false;
protected float|int|null $expiry = null;
protected array $metadata = [];
protected array $newMetadata = [];
protected ?ItemInterface $innerItem = null;
protected ?string $poolHash = null;
protected bool $isTaggable = false;
public function getKey(): string
{
return $this->key;
}
public function get(): mixed
{
return $this->value;
}
public function isHit(): bool
{
return $this->isHit;
}
/**
* @return $this
*/
public function set($value): static
{
$this->value = $value;
return $this;
}
/**
* @return $this
*/
public function expiresAt(?\DateTimeInterface $expiration): static
{
$this->expiry = null !== $expiration ? (float) $expiration->format('U.u') : null;
return $this;
}
/**
* @return $this
*/
public function expiresAfter(mixed $time): static
{
if (null === $time) {
$this->expiry = null;
} elseif ($time instanceof \DateInterval) {
$this->expiry = microtime(true) + \DateTimeImmutable::createFromFormat('U', 0)->add($time)->format('U.u');
} elseif (\is_int($time)) {
$this->expiry = $time + microtime(true);
} else {
throw new InvalidArgumentException(sprintf('Expiration date must be an integer, a DateInterval or null, "%s" given.', get_debug_type($time)));
}
return $this;
}
public function tag(mixed $tags): static
{
if (!$this->isTaggable) {
throw new LogicException(sprintf('Cache item "%s" comes from a non tag-aware pool: you cannot tag it.', $this->key));
}
if (!\is_array($tags) && !$tags instanceof \Traversable) { // don't use is_iterable(), it's slow
$tags = [$tags];
}
foreach ($tags as $tag) {
if (!\is_string($tag) && !$tag instanceof \Stringable) {
throw new InvalidArgumentException(sprintf('Cache tag must be string or object that implements __toString(), "%s" given.', get_debug_type($tag)));
}
$tag = (string) $tag;
if (isset($this->newMetadata[self::METADATA_TAGS][$tag])) {
continue;
}
if ('' === $tag) {
throw new InvalidArgumentException('Cache tag length must be greater than zero.');
}
if (false !== strpbrk($tag, self::RESERVED_CHARACTERS)) {
throw new InvalidArgumentException(sprintf('Cache tag "%s" contains reserved characters "%s".', $tag, self::RESERVED_CHARACTERS));
}
$this->newMetadata[self::METADATA_TAGS][$tag] = $tag;
}
return $this;
}
public function getMetadata(): array
{
return $this->metadata;
}
/**
* Validates a cache key according to PSR-6.
*
* @param mixed $key The key to validate
*
* @throws InvalidArgumentException When $key is not valid
*/
public static function validateKey($key): string
{
if (!\is_string($key)) {
throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', get_debug_type($key)));
}
if ('' === $key) {
throw new InvalidArgumentException('Cache key length must be greater than zero.');
}
if (false !== strpbrk($key, self::RESERVED_CHARACTERS)) {
throw new InvalidArgumentException(sprintf('Cache key "%s" contains reserved characters "%s".', $key, self::RESERVED_CHARACTERS));
}
return $key;
}
/**
* Internal logging helper.
*
* @internal
*/
public static function log(?LoggerInterface $logger, string $message, array $context = []): void
{
if ($logger) {
$logger->warning($message, $context);
} else {
$replace = [];
foreach ($context as $k => $v) {
if (\is_scalar($v)) {
$replace['{'.$k.'}'] = $v;
}
}
@trigger_error(strtr($message, $replace), \E_USER_WARNING);
}
}
private function pack(): mixed
{
if (!$m = $this->newMetadata) {
return $this->value;
}
$valueWrapper = self::VALUE_WRAPPER;
return new $valueWrapper($this->value, $m + ['expiry' => $this->expiry]);
}
private function unpack(): bool
{
$v = $this->value;
$valueWrapper = self::VALUE_WRAPPER;
if ($v instanceof $valueWrapper) {
$this->value = $v->value;
$this->metadata = $v->metadata;
return true;
}
if (!\is_array($v) || 1 !== \count($v) || 10 !== \strlen($k = (string) array_key_first($v)) || "\x9D" !== $k[0] || "\0" !== $k[5] || "\x5F" !== $k[9]) {
return false;
}
// BC with pools populated before v6.1
$this->value = $v[$k];
$this->metadata = unpack('Vexpiry/Nctime', substr($k, 1, -1));
$this->metadata['expiry'] += self::METADATA_EXPIRY_OFFSET;
return true;
}
}
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