123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154 |
- <?php
- declare(strict_types=1);
- /**
- * @copyright Copyright (c) 2024 Louis Chmn <louis@chmn.me>
- *
- * @author Louis Chmn <louis@chmn.me>
- *
- * @license GNU AGPL-3.0-or-later
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * 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, version 3,
- * along with this program. If not, see <http://www.gnu.org/licenses/>
- *
- */
- namespace OCA\Files_Versions\Listener;
- use Exception;
- use OC\Files\Node\NonExistingFile;
- use OCA\Files_Versions\Versions\IVersionBackend;
- use OCA\Files_Versions\Versions\IVersionManager;
- use OCA\Files_Versions\Versions\IVersionsImporterBackend;
- use OCP\EventDispatcher\Event;
- use OCP\EventDispatcher\IEventListener;
- use OCP\Files\Events\Node\AbstractNodesEvent;
- use OCP\Files\Events\Node\BeforeNodeRenamedEvent;
- use OCP\Files\Events\Node\NodeCopiedEvent;
- use OCP\Files\Events\Node\NodeRenamedEvent;
- use OCP\Files\File;
- use OCP\Files\Folder;
- use OCP\Files\Node;
- use OCP\Files\Storage\IStorage;
- use OCP\IUser;
- use OCP\IUserSession;
- /** @template-implements IEventListener<Event> */
- class VersionStorageMoveListener implements IEventListener {
- /** @var File[] */
- private array $movedNodes = [];
- public function __construct(
- private IVersionManager $versionManager,
- private IUserSession $userSession,
- ) {
- }
- /**
- * @abstract Moves version across storages if necessary.
- * @throws Exception No user in session
- */
- public function handle(Event $event): void {
- if (!($event instanceof AbstractNodesEvent)) {
- return;
- }
- $source = $event->getSource();
- $target = $event->getTarget();
- $sourceStorage = $this->getNodeStorage($source);
- $targetStorage = $this->getNodeStorage($target);
- $sourceBackend = $this->versionManager->getBackendForStorage($sourceStorage);
- $targetBackend = $this->versionManager->getBackendForStorage($targetStorage);
- // If same backend, nothing to do.
- if ($sourceBackend === $targetBackend) {
- return;
- }
- $user = $this->userSession->getUser() ?? $source->getOwner();
- if ($user === null) {
- throw new Exception("Cannot move versions across storages without a user.");
- }
- if ($event instanceof BeforeNodeRenamedEvent) {
- $this->recursivelyPrepareMove($source);
- } elseif ($event instanceof NodeRenamedEvent || $event instanceof NodeCopiedEvent) {
- $this->recursivelyHandleMoveOrCopy($event, $user, $source, $target, $sourceBackend, $targetBackend);
- }
- }
- /**
- * Store all sub files in this->movedNodes so their info can be used after the operation.
- */
- private function recursivelyPrepareMove(Node $source): void {
- if ($source instanceof File) {
- $this->movedNodes[$source->getId()] = $source;
- } elseif ($source instanceof Folder) {
- foreach ($source->getDirectoryListing() as $child) {
- $this->recursivelyPrepareMove($child);
- }
- }
- }
- /**
- * Call handleMoveOrCopy on each sub files
- * @param NodeRenamedEvent|NodeCopiedEvent $event
- */
- private function recursivelyHandleMoveOrCopy(Event $event, IUser $user, ?Node $source, Node $target, IVersionBackend $sourceBackend, IVersionBackend $targetBackend): void {
- if ($target instanceof File) {
- if ($event instanceof NodeRenamedEvent) {
- $source = $this->movedNodes[$target->getId()];
- }
- /** @var File $source */
- $this->handleMoveOrCopy($event, $user, $source, $target, $sourceBackend, $targetBackend);
- } elseif ($target instanceof Folder) {
- /** @var Folder $source */
- foreach ($target->getDirectoryListing() as $targetChild) {
- if ($event instanceof NodeCopiedEvent) {
- $sourceChild = $source->get($targetChild->getName());
- } else {
- $sourceChild = null;
- }
- $this->recursivelyHandleMoveOrCopy($event, $user, $sourceChild, $targetChild, $sourceBackend, $targetBackend);
- }
- }
- }
- /**
- * Called only during NodeRenamedEvent or NodeCopiedEvent
- * Will send the source node versions to the new backend, and then delete them from the old backend.
- * @param NodeRenamedEvent|NodeCopiedEvent $event
- */
- private function handleMoveOrCopy(Event $event, IUser $user, File $source, File $target, IVersionBackend $sourceBackend, IVersionBackend $targetBackend): void {
- if ($targetBackend instanceof IVersionsImporterBackend) {
- $versions = $sourceBackend->getVersionsForFile($user, $source);
- $targetBackend->importVersionsForFile($user, $source, $target, $versions);
- }
- if ($event instanceof NodeRenamedEvent && $sourceBackend instanceof IVersionsImporterBackend) {
- $sourceBackend->clearVersionsForFile($user, $source, $target);
- }
- }
- private function getNodeStorage(Node $node): IStorage {
- if ($node instanceof NonExistingFile) {
- return $node->getParent()->getStorage();
- } else {
- return $node->getStorage();
- }
- }
- }
|