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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2018 Robin Appelman <robin@icewind.nl>
*
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\Files_Versions\Versions;
use OC\Files\View;
use OCA\Files_Sharing\SharedStorage;
use OCA\Files_Versions\Db\VersionEntity;
use OCA\Files_Versions\Db\VersionsMapper;
use OCA\Files_Versions\Storage;
use OCP\Files\File;
use OCP\Files\FileInfo;
use OCP\Files\Folder;
use OCP\Files\IMimeTypeLoader;
use OCP\Files\IRootFolder;
use OCP\Files\Node;
use OCP\Files\NotFoundException;
use OCP\Files\Storage\IStorage;
use OCP\IUser;
use OCP\IUserManager;
class LegacyVersionsBackend implements IVersionBackend, INameableVersionBackend, IDeletableVersionBackend {
private IRootFolder $rootFolder;
private IUserManager $userManager;
private VersionsMapper $versionsMapper;
private IMimeTypeLoader $mimeTypeLoader;
public function __construct(
IRootFolder $rootFolder,
IUserManager $userManager,
VersionsMapper $versionsMapper,
IMimeTypeLoader $mimeTypeLoader
) {
$this->rootFolder = $rootFolder;
$this->userManager = $userManager;
$this->versionsMapper = $versionsMapper;
$this->mimeTypeLoader = $mimeTypeLoader;
}
public function useBackendForStorage(IStorage $storage): bool {
return true;
}
public function getVersionsForFile(IUser $user, FileInfo $file): array {
$storage = $file->getStorage();
if ($storage->instanceOfStorage(SharedStorage::class)) {
$owner = $storage->getOwner('');
$user = $this->userManager->get($owner);
$fileId = $file->getId();
if ($fileId === null) {
throw new NotFoundException("File not found ($fileId)");
}
if ($user === null) {
throw new NotFoundException("User $owner not found for $fileId");
}
$userFolder = $this->rootFolder->getUserFolder($user->getUID());
$nodes = $userFolder->getById($fileId);
$file = array_pop($nodes);
if (!$file) {
throw new NotFoundException("version file not found for share owner");
}
} else {
$userFolder = $this->rootFolder->getUserFolder($user->getUID());
}
$fileId = $file->getId();
if ($fileId === null) {
throw new NotFoundException("File not found ($fileId)");
}
$versions = $this->getVersionsForFileFromDB($file, $user);
if (count($versions) > 0) {
return $versions;
}
// Insert the entry in the DB for the current version.
$versionEntity = new VersionEntity();
$versionEntity->setFileId($fileId);
$versionEntity->setTimestamp($file->getMTime());
$versionEntity->setSize($file->getSize());
$versionEntity->setMimetype($this->mimeTypeLoader->getId($file->getMimetype()));
$versionEntity->setMetadata([]);
$this->versionsMapper->insert($versionEntity);
// Insert entries in the DB for existing versions.
$relativePath = $userFolder->getRelativePath($file->getPath());
if ($relativePath === null) {
throw new NotFoundException("Relative path not found for file $fileId (" . $file->getPath() . ')');
}
$versionsOnFS = Storage::getVersions($user->getUID(), $relativePath);
foreach ($versionsOnFS as $version) {
$versionEntity = new VersionEntity();
$versionEntity->setFileId($fileId);
$versionEntity->setTimestamp((int)$version['version']);
$versionEntity->setSize((int)$version['size']);
$versionEntity->setMimetype($this->mimeTypeLoader->getId($version['mimetype']));
$versionEntity->setMetadata([]);
$this->versionsMapper->insert($versionEntity);
}
return $this->getVersionsForFileFromDB($file, $user);
}
/**
* @return IVersion[]
*/
private function getVersionsForFileFromDB(FileInfo $file, IUser $user): array {
$userFolder = $this->rootFolder->getUserFolder($user->getUID());
return array_map(
fn (VersionEntity $versionEntity) => new Version(
$versionEntity->getTimestamp(),
$versionEntity->getTimestamp(),
$file->getName(),
$versionEntity->getSize(),
$this->mimeTypeLoader->getMimetypeById($versionEntity->getMimetype()),
$userFolder->getRelativePath($file->getPath()),
$file,
$this,
$user,
$versionEntity->getLabel(),
),
$this->versionsMapper->findAllVersionsForFileId($file->getId())
);
}
public function createVersion(IUser $user, FileInfo $file) {
$userFolder = $this->rootFolder->getUserFolder($user->getUID());
$relativePath = $userFolder->getRelativePath($file->getPath());
$userView = new View('/' . $user->getUID());
// create all parent folders
Storage::createMissingDirectories($relativePath, $userView);
Storage::scheduleExpire($user->getUID(), $relativePath);
// store a new version of a file
$userView->copy('files/' . $relativePath, 'files_versions/' . $relativePath . '.v' . $file->getMtime());
// ensure the file is scanned
$userView->getFileInfo('files_versions/' . $relativePath . '.v' . $file->getMtime());
}
public function rollback(IVersion $version) {
return Storage::rollback($version->getVersionPath(), $version->getRevisionId(), $version->getUser());
}
private function getVersionFolder(IUser $user): Folder {
$userRoot = $this->rootFolder->getUserFolder($user->getUID())
->getParent();
try {
/** @var Folder $folder */
$folder = $userRoot->get('files_versions');
return $folder;
} catch (NotFoundException $e) {
return $userRoot->newFolder('files_versions');
}
}
public function read(IVersion $version) {
$versions = $this->getVersionFolder($version->getUser());
/** @var File $file */
$file = $versions->get($version->getVersionPath() . '.v' . $version->getRevisionId());
return $file->fopen('r');
}
public function getVersionFile(IUser $user, FileInfo $sourceFile, $revision): File {
$userFolder = $this->rootFolder->getUserFolder($user->getUID());
$versionFolder = $this->getVersionFolder($user);
/** @var File $file */
$file = $versionFolder->get($userFolder->getRelativePath($sourceFile->getPath()) . '.v' . $revision);
return $file;
}
public function setVersionLabel(IVersion $version, string $label): void {
$versionEntity = $this->versionsMapper->findVersionForFileId(
$version->getSourceFile()->getId(),
$version->getTimestamp(),
);
if (trim($label) === '') {
$label = null;
}
$versionEntity->setLabel($label ?? '');
$this->versionsMapper->update($versionEntity);
}
public function deleteVersion(IVersion $version): void {
Storage::deleteRevision($version->getVersionPath(), $version->getRevisionId());
$versionEntity = $this->versionsMapper->findVersionForFileId(
$version->getSourceFile()->getId(),
$version->getTimestamp(),
);
$this->versionsMapper->delete($versionEntity);
}
}
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