73 lines
1.9 KiB
PHP
73 lines
1.9 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014-2020 Spomky-Labs
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*
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* This software may be modified and distributed under the terms
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* of the MIT license. See the LICENSE file for details.
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*/
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namespace Jose\Component\Encryption\Compression;
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use InvalidArgumentException;
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use Throwable;
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final class Deflate implements CompressionMethod
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{
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/**
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* @var int
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*/
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private $compressionLevel = -1;
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/**
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* Deflate constructor.
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*
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* @throws InvalidArgumentException if the compression level is invalid
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*/
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public function __construct(int $compressionLevel = -1)
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{
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if ($compressionLevel < -1 || $compressionLevel > 9) {
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throw new InvalidArgumentException('The compression level can be given as 0 for no compression up to 9 for maximum compression. If -1 given, the default compression level will be the default compression level of the zlib library.');
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}
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$this->compressionLevel = $compressionLevel;
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}
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public function name(): string
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{
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return 'DEF';
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}
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/**
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* @throws InvalidArgumentException if the compression failed
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*/
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public function compress(string $data): string
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{
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try {
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return gzdeflate($data, $this->getCompressionLevel());
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} catch (Throwable $throwable) {
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throw new InvalidArgumentException('Unable to compress data.', $throwable->getCode(), $throwable);
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}
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}
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/**
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* @throws InvalidArgumentException if the decompression failed
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*/
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public function uncompress(string $data): string
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{
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try {
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return gzinflate($data);
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} catch (Throwable $throwable) {
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throw new InvalidArgumentException('Unable to uncompress data.', $throwable->getCode(), $throwable);
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}
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}
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private function getCompressionLevel(): int
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{
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return $this->compressionLevel;
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}
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}
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