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Cache.php
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Cache.php
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<?php
declare(strict_types=1);
/*
* This file is part of PHP CS Fixer.
*
* (c) Fabien Potencier <fabien@symfony.com>
* Dariusz Rumiński <dariusz.ruminski@gmail.com>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace PhpCsFixer\Cache;
/**
* @author Andreas Möller <am@localheinz.com>
*
* @internal
*/
final class Cache implements CacheInterface
{
/**
* @var SignatureInterface
*/
private $signature;
/**
* @var array<string, int>
*/
private $hashes = [];
public function __construct(SignatureInterface $signature)
{
$this->signature = $signature;
}
public function getSignature(): SignatureInterface
{
return $this->signature;
}
public function has(string $file): bool
{
return \array_key_exists($file, $this->hashes);
}
public function get(string $file): ?int
{
if (!$this->has($file)) {
return null;
}
return $this->hashes[$file];
}
public function set(string $file, int $hash): void
{
$this->hashes[$file] = $hash;
}
public function clear(string $file): void
{
unset($this->hashes[$file]);
}
public function toJson(): string
{
$json = json_encode([
'php' => $this->getSignature()->getPhpVersion(),
'version' => $this->getSignature()->getFixerVersion(),
'indent' => $this->getSignature()->getIndent(),
'lineEnding' => $this->getSignature()->getLineEnding(),
'rules' => $this->getSignature()->getRules(),
'hashes' => $this->hashes,
]);
if (JSON_ERROR_NONE !== json_last_error()) {
throw new \UnexpectedValueException(sprintf(
'Cannot encode cache signature to JSON, error: "%s". If you have non-UTF8 chars in your signature, like in license for `header_comment`, consider enabling `ext-mbstring` or install `symfony/polyfill-mbstring`.',
json_last_error_msg()
));
}
return $json;
}
/**
* @throws \InvalidArgumentException
*/
public static function fromJson(string $json): self
{
$data = json_decode($json, true);
if (null === $data && JSON_ERROR_NONE !== json_last_error()) {
throw new \InvalidArgumentException(sprintf(
'Value needs to be a valid JSON string, got "%s", error: "%s".',
$json,
json_last_error_msg()
));
}
$requiredKeys = [
'php',
'version',
'indent',
'lineEnding',
'rules',
'hashes',
];
$missingKeys = array_diff_key(array_flip($requiredKeys), $data);
if (\count($missingKeys) > 0) {
throw new \InvalidArgumentException(sprintf(
'JSON data is missing keys "%s"',
implode('", "', $missingKeys)
));
}
$signature = new Signature(
$data['php'],
$data['version'],
$data['indent'],
$data['lineEnding'],
$data['rules']
);
$cache = new self($signature);
$cache->hashes = $data['hashes'];
return $cache;
}
}