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<?php |
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declare(strict_types=1); |
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namespace Churn\Process; |
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use Churn\File\File; |
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use Churn\File\FileHelper; |
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use Churn\Result\Result; |
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use InvalidArgumentException; |
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use Throwable; |
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class CacheProcessFactory implements ProcessFactory |
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{ |
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/** |
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* @var string The cache file path. |
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*/ |
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private $cachePath; |
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/** |
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* @var ProcessFactory Inner process factory. |
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*/ |
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private $processFactory; |
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/** |
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* @var array<string, array<mixed>> The cached data. |
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*/ |
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private $cache; |
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/** |
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* @param string $cachePath The cache file path. |
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* @param ProcessFactory $processFactory Inner process factory. |
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* @throws InvalidArgumentException If the path is invalid. |
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*/ |
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public function __construct(string $cachePath, ProcessFactory $processFactory) |
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{ |
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try { |
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FileHelper::ensureFileIsWritable($cachePath); |
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} catch (Throwable $e) { |
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$message = 'Invalid cache file path: ' . $e->getMessage(); |
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throw new InvalidArgumentException($message, $e->getCode(), $e); |
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} |
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$this->cachePath = $cachePath; |
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$this->processFactory = $processFactory; |
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$this->cache = $this->loadCache($cachePath); |
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} |
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/** |
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* @param File $file File that the processes will execute on. |
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* @return iterable<ProcessInterface> The list of processes to execute. |
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*/ |
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public function createProcesses(File $file): iterable |
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{ |
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if (!$this->isCached($file)) { |
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return $this->processFactory->createProcesses($file); |
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} |
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$key = $file->getFullPath(); |
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$countChanges = (int) $this->cache[$key][1]; |
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$cyclomaticComplexity = (int) $this->cache[$key][2]; |
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$this->cache[$key][3] = true; |
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return [new PredefinedProcess($file, $countChanges, $cyclomaticComplexity)]; |
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} |
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/** |
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* @param Result $result The result to save. |
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*/ |
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public function addToCache(Result $result): void |
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{ |
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$path = $result->getFile()->getFullPath(); |
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$this->cache[$path][0] = $this->cache[$path][0] ?? \md5_file($path); |
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$this->cache[$path][1] = $result->getCommits(); |
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$this->cache[$path][2] = $result->getComplexity(); |
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$this->cache[$path][3] = true; |
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} |
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/** |
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* Write the cache in its file. |
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*/ |
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public function writeCache(): void |
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{ |
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$data = []; |
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foreach ($this->cache as $path => $values) { |
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if (!$values[3]) { |
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continue; |
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} |
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unset($values[3]); |
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$data[] = \implode(',', \array_merge([$path], $values)); |
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} |
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\file_put_contents($this->cachePath, \implode("\n", $data)); |
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} |
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/** |
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* @param File $file The file to process. |
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*/ |
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private function isCached(File $file): bool |
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{ |
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$key = $file->getFullPath(); |
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if (!isset($this->cache[$key])) { |
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return false; |
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} |
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$md5 = $this->cache[$key][0]; |
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$this->cache[$key][0] = $newMd5 = \md5_file($file->getFullPath()); |
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return $md5 === $newMd5; |
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} |
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/** |
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* @param string $cachePath Cache file path. |
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* @return array<string, array<mixed>> |
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*/ |
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private function loadCache(string $cachePath): array |
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{ |
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if (!\is_file($cachePath)) { |
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return []; |
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} |
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$cache = []; |
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foreach (\file($cachePath) as $row) { |
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$data = \explode(',', $row); |
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$cache[$data[0]] = \array_slice($data, 1); |
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$cache[$data[0]][3] = false; |
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} |
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return $cache; |
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} |
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} |
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bmitch /
churn-php
