nextcloud/apps/files/lib/Service/OwnershipTransferService.php

299 lines
8.9 KiB
PHP

<?php
declare(strict_types=1);
/**
* @copyright 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Sascha Wiswedel <sascha.wiswedel@nextcloud.com>
*
* @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\Service;
use Closure;
use OC\Files\Filesystem;
use OC\Files\View;
use OCA\Files\Exception\TransferOwnershipException;
use OCP\Encryption\IManager as IEncryptionManager;
use OCP\Files\FileInfo;
use OCP\Files\IHomeStorage;
use OCP\Files\Mount\IMountManager;
use OCP\IUser;
use OCP\Share\IManager as IShareManager;
use Symfony\Component\Console\Helper\ProgressBar;
use Symfony\Component\Console\Output\NullOutput;
use Symfony\Component\Console\Output\OutputInterface;
use function array_merge;
use function basename;
use function count;
use function date;
use function is_dir;
use function rtrim;
class OwnershipTransferService {
/** @var IEncryptionManager */
private $encryptionManager;
/** @var IShareManager */
private $shareManager;
/** @var IMountManager */
private $mountManager;
public function __construct(IEncryptionManager $manager,
IShareManager $shareManager,
IMountManager $mountManager) {
$this->encryptionManager = $manager;
$this->shareManager = $shareManager;
$this->mountManager = $mountManager;
}
/**
* @param IUser $sourceUser
* @param IUser $destinationUser
* @param string $path
*
* @param OutputInterface|null $output
* @param bool $move
* @throws TransferOwnershipException
* @throws \OC\User\NoUserException
*/
public function transfer(IUser $sourceUser,
IUser $destinationUser,
string $path,
?OutputInterface $output = null,
bool $move = false): void {
$output = $output ?? new NullOutput();
$sourceUid = $sourceUser->getUID();
$destinationUid = $destinationUser->getUID();
$sourcePath = rtrim($sourceUid . '/files/' . $path, '/');
// target user has to be ready
if ($destinationUser->getLastLogin() === 0 || !$this->encryptionManager->isReadyForUser($destinationUid)) {
throw new TransferOwnershipException("The target user is not ready to accept files. The user has at least to have logged in once.", 2);
}
if ($move) {
$finalTarget = "$destinationUid/files/";
} else {
$date = date('Y-m-d H-i-s');
$finalTarget = "$destinationUid/files/transferred from $sourceUid on $date";
}
// setup filesystem
Filesystem::initMountPoints($sourceUid);
Filesystem::initMountPoints($destinationUid);
$view = new View();
if (!($view->is_dir($sourcePath) || $view->is_file($sourcePath))) {
throw new TransferOwnershipException("Unknown path provided: $path", 1);
}
if ($move && (!$view->is_dir($finalTarget) || count($view->getDirectoryContent($finalTarget)) > 0)) {
throw new TransferOwnershipException("Destination path does not exists or is not empty", 1);
}
// analyse source folder
$this->analyse(
$sourceUid,
$destinationUid,
$sourcePath,
$view,
$output
);
// collect all the shares
$shares = $this->collectUsersShares(
$sourceUid,
$output
);
// transfer the files
$this->transferFiles(
$sourceUid,
$sourcePath,
$finalTarget,
$view,
$output
);
// restore the shares
$this->restoreShares(
$sourceUid,
$destinationUid,
$shares,
$output
);
}
private function walkFiles(View $view, $path, Closure $callBack) {
foreach ($view->getDirectoryContent($path) as $fileInfo) {
if (!$callBack($fileInfo)) {
return;
}
if ($fileInfo->getType() === FileInfo::TYPE_FOLDER) {
$this->walkFiles($view, $fileInfo->getPath(), $callBack);
}
}
}
/**
* @param OutputInterface $output
*
* @throws \Exception
*/
protected function analyse(string $sourceUid,
string $destinationUid,
string $sourcePath,
View $view,
OutputInterface $output): void {
$output->writeln('Validating quota');
$size = $view->getFileInfo($sourcePath, false)->getSize(false);
$freeSpace = $view->free_space($destinationUid . '/files/');
if ($size > $freeSpace) {
$output->writeln('<error>Target user does not have enough free space available.</error>');
throw new \Exception('Execution terminated.');
}
$output->writeln("Analysing files of $sourceUid ...");
$progress = new ProgressBar($output);
$progress->start();
$encryptedFiles = [];
$this->walkFiles($view, $sourcePath,
function (FileInfo $fileInfo) use ($progress) {
if ($fileInfo->getType() === FileInfo::TYPE_FOLDER) {
// only analyze into folders from main storage,
if (!$fileInfo->getStorage()->instanceOfStorage(IHomeStorage::class)) {
return false;
}
return true;
}
$progress->advance();
if ($fileInfo->isEncrypted()) {
$encryptedFiles[] = $fileInfo;
}
return true;
});
$progress->finish();
$output->writeln('');
// no file is allowed to be encrypted
if (!empty($encryptedFiles)) {
$output->writeln("<error>Some files are encrypted - please decrypt them first.</error>");
foreach ($encryptedFiles as $encryptedFile) {
/** @var FileInfo $encryptedFile */
$output->writeln(" " . $encryptedFile->getPath());
}
throw new \Exception('Execution terminated.');
}
}
private function collectUsersShares(string $sourceUid,
OutputInterface $output): array {
$output->writeln("Collecting all share information for files and folders of $sourceUid ...");
$shares = [];
$progress = new ProgressBar($output);
foreach ([\OCP\Share::SHARE_TYPE_GROUP, \OCP\Share::SHARE_TYPE_USER, \OCP\Share::SHARE_TYPE_LINK, \OCP\Share::SHARE_TYPE_REMOTE, \OCP\Share::SHARE_TYPE_ROOM] as $shareType) {
$offset = 0;
while (true) {
$sharePage = $this->shareManager->getSharesBy($sourceUid, $shareType, null, true, 50, $offset);
$progress->advance(count($sharePage));
if (empty($sharePage)) {
break;
}
$shares = array_merge($shares, $sharePage);
$offset += 50;
}
}
$progress->finish();
$output->writeln('');
return $shares;
}
/**
* @throws TransferOwnershipException
*/
protected function transferFiles(string $sourceUid,
string $sourcePath,
string $finalTarget,
View $view,
OutputInterface $output): void {
$output->writeln("Transferring files to $finalTarget ...");
// This change will help user to transfer the folder specified using --path option.
// Else only the content inside folder is transferred which is not correct.
if ($sourcePath !== "$sourceUid/files") {
$view->mkdir($finalTarget);
$finalTarget = $finalTarget . '/' . basename($sourcePath);
}
if ($view->rename($sourcePath, $finalTarget) === false) {
throw new TransferOwnershipException("Could not transfer files.", 1);
}
if (!is_dir("$sourceUid/files")) {
// because the files folder is moved away we need to recreate it
$view->mkdir("$sourceUid/files");
}
}
private function restoreShares(string $sourceUid,
string $destinationUid,
array $shares,
OutputInterface $output) {
$output->writeln("Restoring shares ...");
$progress = new ProgressBar($output, count($shares));
foreach ($shares as $share) {
try {
if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER &&
$share->getSharedWith() === $destinationUid) {
// Unmount the shares before deleting, so we don't try to get the storage later on.
$shareMountPoint = $this->mountManager->find('/' . $destinationUid . '/files' . $share->getTarget());
if ($shareMountPoint) {
$this->mountManager->removeMount($shareMountPoint->getMountPoint());
}
$this->shareManager->deleteShare($share);
} else {
if ($share->getShareOwner() === $sourceUid) {
$share->setShareOwner($destinationUid);
}
if ($share->getSharedBy() === $sourceUid) {
$share->setSharedBy($destinationUid);
}
$this->shareManager->updateShare($share);
}
} catch (\OCP\Files\NotFoundException $e) {
$output->writeln('<error>Share with id ' . $share->getId() . ' points at deleted file, skipping</error>');
} catch (\Throwable $e) {
$output->writeln('<error>Could not restore share with id ' . $share->getId() . ':' . $e->getTraceAsString() . '</error>');
}
$progress->advance();
}
$progress->finish();
$output->writeln('');
}
}