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<?php |
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namespace Storeman\Hash; |
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use Storeman\Config\Configuration; |
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use Storeman\FileReader; |
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use Storeman\Hash\Algorithm\HashAlgorithmInterface; |
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use Storeman\Index\IndexObject; |
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final class HashProvider |
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{ |
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/** |
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* @var FileReader |
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*/ |
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protected $fileReader; |
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/** |
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* @var Configuration |
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*/ |
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protected $configuration; |
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/** |
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* @var HashAlgorithmInterface[] |
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*/ |
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protected $algorithms = []; |
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public function __construct(FileReader $fileReader, Configuration $configuration, array $algorithms) |
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{ |
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$this->fileReader = $fileReader; |
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$this->configuration = $configuration; |
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$this->algorithms = $algorithms; |
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} |
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public function getHash(IndexObject $indexObject, string $algorithm): string |
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{ |
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$hashes = $indexObject->getHashes(); |
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if (!$hashes->hasHash($algorithm)) |
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{ |
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$this->loadHashes($indexObject, [$algorithm]); |
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} |
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return $hashes->getHash($algorithm); |
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} |
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public function loadHashes(IndexObject $indexObject, array $algorithms): void |
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{ |
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// prevent computation of already known hashes |
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$algorithms = array_diff($algorithms, array_keys(iterator_to_array($indexObject->getHashes()))); |
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View Code Duplication |
if ($unknownAlgorithms = array_diff($algorithms, array_keys($this->algorithms))) |
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{ |
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throw new \InvalidArgumentException(sprintf('Unknown algorithm(s): %s', implode(',', $unknownAlgorithms))); |
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} |
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// prevent re-computation of hashes that are build on file read anyway |
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$missingAlgorithms = array_diff($algorithms, $this->configuration->getFileChecksums()); |
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$this->doLoadHashes($indexObject, $missingAlgorithms); |
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} |
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protected function doLoadHashes(IndexObject $indexObject, array $algorithms): void |
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{ |
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$hashFunction = new AggregateHashAlgorithm(array_intersect_key($this->algorithms, array_flip($algorithms))); |
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$hashFunction->initialize(); |
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$fileHandle = $this->fileReader->getReadStream($indexObject); |
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while (!feof($fileHandle)) |
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{ |
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$buffer = fread($fileHandle, 65536); |
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if ($buffer === false) |
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{ |
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throw new \RuntimeException("fread() failed"); |
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} |
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$hashFunction->digest($buffer); |
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} |
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foreach ($hashFunction->finalize() as $algorithm => $hash) |
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{ |
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$indexObject->getHashes()->addHash($algorithm, $hash); |
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} |
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fclose($fileHandle); |
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} |
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} |
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storeman-io /
storeman
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.