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<?php declare(strict_types=1); namespace Jose\Component\Encryption\Compression; use InvalidArgumentException; use Throwable; use function is_string; /** * @deprecated This class is deprecated and will be removed in v4.0. Compression is not recommended for JWE. */ final class Deflate implements CompressionMethod { private int $compressionLevel = -1; public function __construct(int $compressionLevel = -1) { if ($compressionLevel < -1 || $compressionLevel > 9) { throw new InvalidArgumentException( 'The compression level can be given as 0 for no compression up to 9 for maximum compression. If -1 given, the default compression level will be the default compression level of the zlib library.' ); } $this->compressionLevel = $compressionLevel; } public function name(): string { return 'DEF'; } public function compress(string $data): string { try { $bin = gzdeflate($data, $this->getCompressionLevel()); if (! is_string($bin)) { throw new InvalidArgumentException('Unable to encode the data'); } return $bin; } catch (Throwable $throwable) { throw new InvalidArgumentException('Unable to compress data.', $throwable->getCode(), $throwable); } } public function uncompress(string $data): string { try { $bin = gzinflate($data); if (! is_string($bin)) { throw new InvalidArgumentException('Unable to encode the data'); } return $bin; } catch (Throwable $throwable) { throw new InvalidArgumentException('Unable to uncompress data.', $throwable->getCode(), $throwable); } } private function getCompressionLevel(): int { return $this->compressionLevel; } }
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