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<?php |
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namespace Archivr\OperationCollectionBuilder; |
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use Archivr\Exception\Exception; |
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use Archivr\Index; |
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use Archivr\IndexObject; |
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use Archivr\Operation\ChmodOperation; |
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use Archivr\Operation\DownloadOperation; |
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use Archivr\Operation\MkdirOperation; |
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use Archivr\Operation\SymlinkOperation; |
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use Archivr\Operation\TouchOperation; |
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use Archivr\Operation\UnlinkOperation; |
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use Archivr\Operation\UploadOperation; |
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use Archivr\OperationCollection; |
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class StandardOperationCollectionBuilder implements OperationCollectionBuilderInterface |
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{ |
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public function buildOperationCollection(Index $mergedIndex, Index $localIndex, Index $remoteIndex = null): OperationCollection |
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{ |
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$uploadStreamFilters = [ |
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'zlib.deflate' => [] |
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]; |
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$downloadStreamFilters = [ |
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'zlib.inflate' => [] |
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]; |
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$operationCollection = new OperationCollection(); |
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// mtimes to be set for directories are collected and applied afterwards as they get modified by synchronization operations as well |
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$directoryMtimes = []; |
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// set of modified paths that can be populated and is later used to add parent directory touch()es |
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$modifiedPaths = []; |
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// relies on the directory tree structure being traversed in pre-order (or at least a directory appears before its content) |
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foreach ($mergedIndex as $mergedIndexObject) |
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{ |
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/** @var IndexObject $mergedIndexObject */ |
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$localObject = $localIndex->getObjectByPath($mergedIndexObject->getRelativePath()); |
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$remoteObject = $remoteIndex ? $remoteIndex->getObjectByPath($mergedIndexObject->getRelativePath()) : null; |
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// unlink to-be-overridden local path with different type |
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if ($localObject !== null && $localObject->getType() !== $mergedIndexObject->getType()) |
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{ |
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$operationCollection->addOperation(new UnlinkOperation($mergedIndexObject->getRelativePath())); |
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$modifiedPaths[] = $mergedIndexObject->getRelativePath(); |
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} |
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if ($mergedIndexObject->isDirectory()) |
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{ |
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if ($localObject === null || !$localObject->isDirectory()) |
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{ |
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$operationCollection->addOperation(new MkdirOperation($mergedIndexObject->getRelativePath(), $mergedIndexObject->getMode())); |
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$directoryMtimes[$mergedIndexObject->getRelativePath()] = $mergedIndexObject->getMtime(); |
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} |
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if ($localObject !== null && $localObject->isDirectory()) |
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{ |
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if ($localObject->getMtime() !== $mergedIndexObject->getMtime()) |
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{ |
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// fix wrong mtime |
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$directoryMtimes[$mergedIndexObject->getRelativePath()] = $mergedIndexObject->getMtime(); |
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} |
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} |
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} |
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elseif ($mergedIndexObject->isFile()) |
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{ |
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// local file did not exist, hasn't been a file before or is outdated |
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$doDownloadFile = $localObject === null || !$localObject->isFile() || $localObject->getMtime() < $mergedIndexObject->getMtime(); |
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// file has to be restored as it does not equal the local version |
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$doDownloadFile |= $localObject !== null && $mergedIndexObject->getBlobId() !== $localObject->getBlobId(); |
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if ($doDownloadFile) |
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{ |
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$operationCollection->addOperation(new DownloadOperation($mergedIndexObject->getRelativePath(), $mergedIndexObject->getBlobId(), $downloadStreamFilters)); |
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$operationCollection->addOperation(new TouchOperation($mergedIndexObject->getRelativePath(), $mergedIndexObject->getMtime())); |
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$operationCollection->addOperation(new ChmodOperation($mergedIndexObject->getRelativePath(), $mergedIndexObject->getMode())); |
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$modifiedPaths[] = $mergedIndexObject->getRelativePath(); |
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} |
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// local file got created or updated |
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elseif ($remoteObject === null || $mergedIndexObject->getBlobId() === null) |
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{ |
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// generate blob id |
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// todo: we might want to have some mechanism to prevent overriding existing file in case of collision |
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$newBlobId = $mergedIndex->generateNewBlobId(); |
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$mergedIndexObject->setBlobId($newBlobId); |
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$operationCollection->addOperation(new UploadOperation($mergedIndexObject->getRelativePath(), $mergedIndexObject->getBlobId(), $uploadStreamFilters)); |
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} |
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} |
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elseif ($mergedIndexObject->isLink()) |
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{ |
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if ($localObject !== null && $localObject->getLinkTarget() !== $mergedIndexObject->getLinkTarget()) |
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{ |
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$operationCollection->addOperation(new UnlinkOperation($mergedIndexObject->getRelativePath())); |
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$operationCollection->addOperation(new SymlinkOperation($mergedIndexObject->getRelativePath(), $mergedIndexObject->getLinkTarget(), $mergedIndexObject->getMode())); |
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$modifiedPaths[] = $mergedIndexObject->getRelativePath(); |
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} |
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} |
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else |
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{ |
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// unknown/invalid object type |
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throw new Exception(); |
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} |
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if ($localObject !== null && $localObject->getMode() !== $mergedIndexObject->getMode()) |
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{ |
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$operationCollection->addOperation(new ChmodOperation($mergedIndexObject->getRelativePath(), $mergedIndexObject->getMode())); |
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} |
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} |
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// remove superfluous local files |
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foreach ($localIndex as $localObject) |
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{ |
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/** @var IndexObject $localObject */ |
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if ($mergedIndex->getObjectByPath($localObject->getRelativePath()) === null) |
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{ |
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$operationCollection->addOperation(new UnlinkOperation($localObject->getRelativePath())); |
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$modifiedPaths[] = $localObject->getRelativePath(); |
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} |
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} |
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// add modified paths to directory mtimes to be set |
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foreach ($modifiedPaths as $modifiedPath) |
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{ |
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if (($dir = dirname($modifiedPath)) !== '.') |
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{ |
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$dirObject = $mergedIndex->getObjectByPath($dir); |
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$directoryMtimes[$dirObject->getRelativePath()] = $dirObject->getMtime(); |
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} |
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} |
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// set directory mtimes after all other modifications have been performed |
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krsort($directoryMtimes); |
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foreach ($directoryMtimes as $relativePath => $mtime) |
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{ |
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$operationCollection->addOperation(new TouchOperation($relativePath, $mtime)); |
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} |
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return $operationCollection; |
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} |
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} |
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storeman-io /
storeman
