299 lines
8.9 KiB
PHP
299 lines
8.9 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
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*
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Sascha Wiswedel <sascha.wiswedel@nextcloud.com>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OCA\Files\Service;
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use Closure;
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use OC\Files\Filesystem;
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use OC\Files\View;
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use OCA\Files\Exception\TransferOwnershipException;
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use OCP\Encryption\IManager as IEncryptionManager;
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use OCP\Files\FileInfo;
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use OCP\Files\IHomeStorage;
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use OCP\Files\Mount\IMountManager;
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use OCP\IUser;
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use OCP\Share\IManager as IShareManager;
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use Symfony\Component\Console\Helper\ProgressBar;
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use Symfony\Component\Console\Output\NullOutput;
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use Symfony\Component\Console\Output\OutputInterface;
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use function array_merge;
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use function basename;
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use function count;
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use function date;
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use function is_dir;
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use function rtrim;
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class OwnershipTransferService {
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/** @var IEncryptionManager */
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private $encryptionManager;
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/** @var IShareManager */
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private $shareManager;
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/** @var IMountManager */
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private $mountManager;
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public function __construct(IEncryptionManager $manager,
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IShareManager $shareManager,
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IMountManager $mountManager) {
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$this->encryptionManager = $manager;
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$this->shareManager = $shareManager;
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$this->mountManager = $mountManager;
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}
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/**
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* @param IUser $sourceUser
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* @param IUser $destinationUser
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* @param string $path
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*
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* @param OutputInterface|null $output
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* @param bool $move
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* @throws TransferOwnershipException
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* @throws \OC\User\NoUserException
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*/
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public function transfer(IUser $sourceUser,
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IUser $destinationUser,
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string $path,
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?OutputInterface $output = null,
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bool $move = false): void {
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$output = $output ?? new NullOutput();
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$sourceUid = $sourceUser->getUID();
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$destinationUid = $destinationUser->getUID();
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$sourcePath = rtrim($sourceUid . '/files/' . $path, '/');
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// target user has to be ready
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if ($destinationUser->getLastLogin() === 0 || !$this->encryptionManager->isReadyForUser($destinationUid)) {
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throw new TransferOwnershipException("The target user is not ready to accept files. The user has at least to have logged in once.", 2);
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}
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if ($move) {
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$finalTarget = "$destinationUid/files/";
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} else {
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$date = date('Y-m-d H-i-s');
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$finalTarget = "$destinationUid/files/transferred from $sourceUid on $date";
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}
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// setup filesystem
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Filesystem::initMountPoints($sourceUid);
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Filesystem::initMountPoints($destinationUid);
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$view = new View();
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if (!($view->is_dir($sourcePath) || $view->is_file($sourcePath))) {
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throw new TransferOwnershipException("Unknown path provided: $path", 1);
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}
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if ($move && (!$view->is_dir($finalTarget) || count($view->getDirectoryContent($finalTarget)) > 0)) {
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throw new TransferOwnershipException("Destination path does not exists or is not empty", 1);
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}
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// analyse source folder
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$this->analyse(
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$sourceUid,
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$destinationUid,
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$sourcePath,
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$view,
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$output
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);
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// collect all the shares
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$shares = $this->collectUsersShares(
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$sourceUid,
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$output
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);
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// transfer the files
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$this->transferFiles(
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$sourceUid,
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$sourcePath,
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$finalTarget,
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$view,
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$output
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);
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// restore the shares
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$this->restoreShares(
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$sourceUid,
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$destinationUid,
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$shares,
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$output
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);
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}
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private function walkFiles(View $view, $path, Closure $callBack) {
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foreach ($view->getDirectoryContent($path) as $fileInfo) {
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if (!$callBack($fileInfo)) {
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return;
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}
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if ($fileInfo->getType() === FileInfo::TYPE_FOLDER) {
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$this->walkFiles($view, $fileInfo->getPath(), $callBack);
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}
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}
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}
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/**
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* @param OutputInterface $output
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*
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* @throws \Exception
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*/
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protected function analyse(string $sourceUid,
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string $destinationUid,
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string $sourcePath,
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View $view,
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OutputInterface $output): void {
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$output->writeln('Validating quota');
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$size = $view->getFileInfo($sourcePath, false)->getSize(false);
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$freeSpace = $view->free_space($destinationUid . '/files/');
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if ($size > $freeSpace) {
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$output->writeln('<error>Target user does not have enough free space available.</error>');
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throw new \Exception('Execution terminated.');
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}
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$output->writeln("Analysing files of $sourceUid ...");
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$progress = new ProgressBar($output);
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$progress->start();
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$encryptedFiles = [];
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$this->walkFiles($view, $sourcePath,
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function (FileInfo $fileInfo) use ($progress) {
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if ($fileInfo->getType() === FileInfo::TYPE_FOLDER) {
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// only analyze into folders from main storage,
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if (!$fileInfo->getStorage()->instanceOfStorage(IHomeStorage::class)) {
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return false;
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}
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return true;
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}
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$progress->advance();
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if ($fileInfo->isEncrypted()) {
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$encryptedFiles[] = $fileInfo;
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}
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return true;
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});
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$progress->finish();
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$output->writeln('');
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// no file is allowed to be encrypted
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if (!empty($encryptedFiles)) {
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$output->writeln("<error>Some files are encrypted - please decrypt them first.</error>");
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foreach ($encryptedFiles as $encryptedFile) {
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/** @var FileInfo $encryptedFile */
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$output->writeln(" " . $encryptedFile->getPath());
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}
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throw new \Exception('Execution terminated.');
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}
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}
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private function collectUsersShares(string $sourceUid,
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OutputInterface $output): array {
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$output->writeln("Collecting all share information for files and folders of $sourceUid ...");
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$shares = [];
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$progress = new ProgressBar($output);
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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 $shareType) {
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$offset = 0;
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while (true) {
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$sharePage = $this->shareManager->getSharesBy($sourceUid, $shareType, null, true, 50, $offset);
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$progress->advance(count($sharePage));
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if (empty($sharePage)) {
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break;
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}
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$shares = array_merge($shares, $sharePage);
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$offset += 50;
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}
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}
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$progress->finish();
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$output->writeln('');
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return $shares;
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}
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/**
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* @throws TransferOwnershipException
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*/
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protected function transferFiles(string $sourceUid,
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string $sourcePath,
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string $finalTarget,
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View $view,
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OutputInterface $output): void {
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$output->writeln("Transferring files to $finalTarget ...");
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// This change will help user to transfer the folder specified using --path option.
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// Else only the content inside folder is transferred which is not correct.
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if ($sourcePath !== "$sourceUid/files") {
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$view->mkdir($finalTarget);
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$finalTarget = $finalTarget . '/' . basename($sourcePath);
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}
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if ($view->rename($sourcePath, $finalTarget) === false) {
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throw new TransferOwnershipException("Could not transfer files.", 1);
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}
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if (!is_dir("$sourceUid/files")) {
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// because the files folder is moved away we need to recreate it
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$view->mkdir("$sourceUid/files");
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}
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}
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private function restoreShares(string $sourceUid,
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string $destinationUid,
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array $shares,
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OutputInterface $output) {
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$output->writeln("Restoring shares ...");
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$progress = new ProgressBar($output, count($shares));
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foreach ($shares as $share) {
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try {
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if ($share->getShareType() === \OCP\Share::SHARE_TYPE_USER &&
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$share->getSharedWith() === $destinationUid) {
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// Unmount the shares before deleting, so we don't try to get the storage later on.
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$shareMountPoint = $this->mountManager->find('/' . $destinationUid . '/files' . $share->getTarget());
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if ($shareMountPoint) {
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$this->mountManager->removeMount($shareMountPoint->getMountPoint());
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}
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$this->shareManager->deleteShare($share);
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} else {
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if ($share->getShareOwner() === $sourceUid) {
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$share->setShareOwner($destinationUid);
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}
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if ($share->getSharedBy() === $sourceUid) {
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$share->setSharedBy($destinationUid);
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}
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$this->shareManager->updateShare($share);
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}
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} catch (\OCP\Files\NotFoundException $e) {
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$output->writeln('<error>Share with id ' . $share->getId() . ' points at deleted file, skipping</error>');
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} catch (\Throwable $e) {
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$output->writeln('<error>Could not restore share with id ' . $share->getId() . ':' . $e->getTraceAsString() . '</error>');
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}
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$progress->advance();
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}
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$progress->finish();
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$output->writeln('');
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}
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}
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