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<?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;
protected $key;
protected $value;
protected $isHit = false;
protected $expiry;
protected $metadata = [];
protected $newMetadata = [];
protected $innerItem;
protected $poolHash;
protected $isTaggable = false;
/**
* {@inheritdoc}
*/
public function getKey(): string
{
return $this->key;
}
/**
* {@inheritdoc}
*
* @return mixed
*/
public function get()
{
return $this->value;
}
/**
* {@inheritdoc}
*/
public function isHit(): bool
{
return $this->isHit;
}
/**
* {@inheritdoc}
*
* @return $this
*/
public function set($value): self
{
$this->value = $value;
return $this;
}
/**
* {@inheritdoc}
*
* @return $this
*/
public function expiresAt($expiration): self
{
if (null === $expiration) {
$this->expiry = null;
} elseif ($expiration instanceof \DateTimeInterface) {
$this->expiry = (float) $expiration->format('U.u');
} else {
throw new InvalidArgumentException(sprintf('Expiration date must implement DateTimeInterface or be null, "%s" given.', \is_object($expiration) ? \get_class($expiration) : \gettype($expiration)));
}
return $this;
}
/**
* {@inheritdoc}
*
* @return $this
*/
public function expiresAfter($time): self
{
if (null === $time) {
$this->expiry = null;
} elseif ($time instanceof \DateInterval) {
$this->expiry = microtime(true) + \DateTime::createFromFormat('U', 0)->add($time)->format('U.u');
} elseif (\is_int($time)) {
$this->expiry = $time + microtime(true);
} else {
throw new InvalidArgumentException(sprintf('Expiration date must be an integer, a DateInterval or null, "%s" given.', \is_object($time) ? \get_class($time) : \gettype($time)));
}
return $this;
}
/**
* {@inheritdoc}
*/
public function tag($tags): ItemInterface
{
if (!$this->isTaggable) {
throw new LogicException(sprintf('Cache item "%s" comes from a non tag-aware pool: you cannot tag it.', $this->key));
}
if (!is_iterable($tags)) {
$tags = [$tags];
}
foreach ($tags as $tag) {
if (!\is_string($tag) && !(\is_object($tag) && method_exists($tag, '__toString'))) {
throw new InvalidArgumentException(sprintf('Cache tag must be string or object that implements __toString(), "%s" given.', \is_object($tag) ? \get_class($tag) : \gettype($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;
}
/**
* {@inheritdoc}
*/
public function getMetadata(): array
{
return $this->metadata;
}
/**
* Returns the list of tags bound to the value coming from the pool storage if any.
*
* @deprecated since Symfony 4.2, use the "getMetadata()" method instead.
*/
public function getPreviousTags(): array
{
@trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the "getMetadata()" method instead.', __METHOD__), \E_USER_DEPRECATED);
return $this->metadata[self::METADATA_TAGS] ?? [];
}
/**
* 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($key)) {
throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', \is_object($key) ? \get_class($key) : \gettype($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 $context = [])
{
if ($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);
}
}
}