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<?php declare(strict_types=1);
/*
* This file is part of phpunit/php-code-coverage.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\CodeCoverage\StaticAnalysis;
use const DIRECTORY_SEPARATOR;
use function file_get_contents;
use function file_put_contents;
use function filemtime;
use function hash;
use function is_file;
use function serialize;
use function unserialize;
use SebastianBergmann\CodeCoverage\Directory;
/**
* @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
*/
abstract class Cache
{
/**
* @var string
*/
private $directory;
public function __construct(string $directory)
{
Directory::create($directory);
$this->directory = $directory;
}
protected function has(string $filename, string $key): bool
{
$cacheFile = $this->cacheFile($filename, $key);
if (!is_file($cacheFile)) {
return false;
}
if (filemtime($cacheFile) < filemtime($filename)) {
return false;
}
return true;
}
/**
* @psalm-param list<class-string> $allowedClasses
*
* @return mixed
*/
protected function read(string $filename, string $key, array $allowedClasses = [])
{
$options = ['allowed_classes' => false];
if (!empty($allowedClasses)) {
$options = ['allowed_classes' => $allowedClasses];
}
return unserialize(
file_get_contents(
$this->cacheFile($filename, $key)
),
$options
);
}
/**
* @param mixed $data
*/
protected function write(string $filename, string $key, $data): void
{
file_put_contents(
$this->cacheFile($filename, $key),
serialize($data)
);
}
private function cacheFile(string $filename, string $key): string
{
return $this->directory . DIRECTORY_SEPARATOR . hash('sha256', $filename . $key);
}
}