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<?php
/**
* SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\Files_Sharing;
use OC\Files\Cache\FileAccess;
use OC\Files\Filesystem;
use OC\Files\Mount\MountPoint;
use OCP\Constants;
use OCP\Files\Folder;
use OCP\Files\Mount\IMountManager;
use OCP\Server;
use OCP\Share\IShare;
class Updater {
/**
* @param array $params
*/
public static function renameHook($params) {
self::renameChildren($params['oldpath'], $params['newpath']);
self::moveShareInOrOutOfShare($params['newpath']);
}
/**
* Fix for https://github.com/owncloud/core/issues/20769
*
* The owner is allowed to move their files (if they are shared) into a receiving folder
* In this case we need to update the parent of the moved share. Since they are
* effectively handing over ownership of the file the rest of the code needs to know
* they need to build up the reshare tree.
*
* @param string $path
*/
private static function moveShareInOrOutOfShare($path): void {
$userFolder = \OC::$server->getUserFolder();
// If the user folder can't be constructed (e.g. link share) just return.
if ($userFolder === null) {
return;
}
$user = $userFolder->getOwner();
if (!$user) {
throw new \Exception('user folder has no owner');
}
$src = $userFolder->get($path);
$shareManager = Server::get(\OCP\Share\IManager::class);
// We intentionally include invalid shares, as they have been automatically invalidated due to the node no longer
// being accessible for the user. Only in this case where we adjust the share after it was moved we want to ignore
// this to be able to still adjust it.
// FIXME: should CIRCLES be included here ??
$shares = $shareManager->getSharesBy($user->getUID(), IShare::TYPE_USER, $src, false, -1, onlyValid: false);
$shares = array_merge($shares, $shareManager->getSharesBy($user->getUID(), IShare::TYPE_GROUP, $src, false, -1, onlyValid: false));
$shares = array_merge($shares, $shareManager->getSharesBy($user->getUID(), IShare::TYPE_ROOM, $src, false, -1, onlyValid: false));
if ($src instanceof Folder) {
$cacheAccess = Server::get(FileAccess::class);
$sourceStorageId = $src->getStorage()->getCache()->getNumericStorageId();
$sourceInternalPath = $src->getInternalPath();
$subShares = array_merge(
$shareManager->getSharesBy($user->getUID(), IShare::TYPE_USER, onlyValid: false),
$shareManager->getSharesBy($user->getUID(), IShare::TYPE_GROUP, onlyValid: false),
$shareManager->getSharesBy($user->getUID(), IShare::TYPE_ROOM, onlyValid: false),
);
$shareSourceIds = array_map(fn (IShare $share) => $share->getNodeId(), $subShares);
$shareSources = $cacheAccess->getByFileIdsInStorage($shareSourceIds, $sourceStorageId);
foreach ($subShares as $subShare) {
$shareCacheEntry = $shareSources[$subShare->getNodeId()] ?? null;
if (
$shareCacheEntry &&
str_starts_with($shareCacheEntry->getPath(), $sourceInternalPath . '/')
) {
$shares[] = $subShare;
}
}
}
// If the path we move is not a share we don't care
if (empty($shares)) {
return;
}
// Check if the destination is inside a share
$mountManager = Server::get(IMountManager::class);
$dstMount = $mountManager->find($src->getPath());
//Ownership is moved over
foreach ($shares as $share) {
if (
$share->getShareType() !== IShare::TYPE_USER &&
$share->getShareType() !== IShare::TYPE_GROUP &&
$share->getShareType() !== IShare::TYPE_ROOM
) {
continue;
}
if ($dstMount instanceof SharedMount) {
if (!($dstMount->getShare()->getPermissions() & Constants::PERMISSION_SHARE)) {
$shareManager->deleteShare($share);
continue;
}
$newOwner = $dstMount->getShare()->getShareOwner();
$newPermissions = $share->getPermissions() & $dstMount->getShare()->getPermissions();
} else {
$newOwner = $userFolder->getOwner()->getUID();
$newPermissions = $share->getPermissions();
}
$share->setShareOwner($newOwner);
$share->setPermissions($newPermissions);
$shareManager->updateShare($share, onlyValid: false);
}
}
/**
* rename mount point from the children if the parent was renamed
*
* @param string $oldPath old path relative to data/user/files
* @param string $newPath new path relative to data/user/files
*/
private static function renameChildren($oldPath, $newPath) {
$absNewPath = Filesystem::normalizePath('/' . \OC_User::getUser() . '/files/' . $newPath);
$absOldPath = Filesystem::normalizePath('/' . \OC_User::getUser() . '/files/' . $oldPath);
$mountManager = Filesystem::getMountManager();
$mountedShares = $mountManager->findIn('/' . \OC_User::getUser() . '/files/' . $oldPath);
foreach ($mountedShares as $mount) {
/** @var MountPoint $mount */
if ($mount->getStorage()->instanceOfStorage(ISharedStorage::class)) {
$mountPoint = $mount->getMountPoint();
$target = str_replace($absOldPath, $absNewPath, $mountPoint);
$mount->moveMount($target);
}
}
}
}
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