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feat(files_versions): Add listener and interfaces to allow versions m…
…igration across storages Signed-off-by: Louis Chemineau <[email protected]>
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134 changes: 134 additions & 0 deletions
134
apps/files_versions/lib/Listener/VersionStorageMoveListener.php
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
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| /** | ||
| * @copyright Copyright (c) 2024 Louis Chmn <[email protected]> | ||
| * | ||
| * @author Louis Chmn <[email protected]> | ||
| * | ||
| * @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; | ||
|
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| 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\BeforeNodeCopiedEvent; | ||
| 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; | ||
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| /** @template-implements IEventListener<Event> */ | ||
| class VersionStorageMoveListener implements IEventListener { | ||
| /** @var File[] */ | ||
| private array $movedNodes = []; | ||
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| public function __construct( | ||
| private IVersionManager $versionManager, | ||
| private IUserSession $userSession, | ||
| ) { | ||
| } | ||
|
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| /** | ||
| * @abstract Moves version across storages if necessary. | ||
| * @throws Exception No user in session | ||
| */ | ||
| public function handle(Event $event): void { | ||
| if (!($event instanceof AbstractNodesEvent)) { | ||
| return; | ||
| } | ||
|
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| $source = $event->getSource(); | ||
| $target = $event->getTarget(); | ||
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| $sourceStorage = $this->getNodeStorage($source); | ||
| $targetStorage = $this->getNodeStorage($target); | ||
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| $sourceBackend = $this->versionManager->getBackendForStorage($sourceStorage); | ||
| $targetBackend = $this->versionManager->getBackendForStorage($targetStorage); | ||
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| // If same backend, nothing to do. | ||
| if ($sourceBackend === $targetBackend) { | ||
| return; | ||
| } | ||
|
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| $user = $this->userSession->getUser() ?? $source->getOwner(); | ||
|
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| if ($user === null) { | ||
| throw new Exception("Cannot move versions across storages without a user."); | ||
| } | ||
|
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| if ($event instanceof BeforeNodeRenamedEvent || $event instanceof BeforeNodeCopiedEvent) { | ||
| $this->recursivelyPrepareMoveOrCopy($source); | ||
| } elseif ($event instanceof NodeRenamedEvent || $event instanceof NodeCopiedEvent) { | ||
| $this->recursivelyHandleMoveOrCopy($event, $user, $target, $sourceBackend, $targetBackend); | ||
| } | ||
| } | ||
|
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| private function recursivelyPrepareMoveOrCopy(Node $source): void { | ||
| if ($source instanceof File) { | ||
| $this->movedNodes[$source->getId()] = $source; | ||
| } elseif ($source instanceof Folder) { | ||
| foreach ($source->getDirectoryListing() as $child) { | ||
| $this->recursivelyPrepareMoveOrCopy($child); | ||
| } | ||
| } | ||
| } | ||
|
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| private function recursivelyHandleMoveOrCopy(Event $event, IUser $user, Node $target, IVersionBackend $sourceBackend, IVersionBackend $targetBackend): void { | ||
| if ($target instanceof File) { | ||
| $originalSource = $this->movedNodes[$target->getId()]; | ||
| $this->handleMoveOrCopy($event, $user, $originalSource, $target, $sourceBackend, $targetBackend); | ||
| } else { | ||
| /** @var Folder $target */ | ||
| foreach ($target->getDirectoryListing() as $child) { | ||
| $this->recursivelyHandleMoveOrCopy($event, $user, $child, $sourceBackend, $targetBackend); | ||
| } | ||
| } | ||
| } | ||
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| // Called only during NodeRenamedEvent or NodeCopiedEvent | ||
| 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, $versions); | ||
| } | ||
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| if ($event instanceof NodeRenamedEvent && $sourceBackend instanceof IVersionsImporterBackend) { | ||
| $sourceBackend->clearVersionsForFile($user, $source, $target); | ||
| } | ||
| } | ||
|
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| private function getNodeStorage(Node $node): IStorage { | ||
| if ($node instanceof NonExistingFile) { | ||
| return $node->getParent()->getStorage(); | ||
| } else { | ||
| return $node->getStorage(); | ||
| } | ||
| } | ||
| } |
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50 changes: 50 additions & 0 deletions
50
apps/files_versions/lib/Versions/IVersionsImporterBackend.php
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
||
| /** | ||
| * @copyright Copyright (c) 2024 Louis Chmn <[email protected]> | ||
| * | ||
| * @author Louis Chmn <[email protected]> | ||
| * | ||
| * @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; | ||
|
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| use OCP\Files\Node; | ||
| use OCP\IUser; | ||
|
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| /** | ||
| * @since 29.0.0 | ||
| */ | ||
| interface IVersionsImporterBackend { | ||
| /** | ||
| * Import the given versions for the target file. | ||
| * | ||
| * @param Node $target - The target is not yet created. | ||
| * @param IVersion[] $versions | ||
| * @since 29.0.0 | ||
| */ | ||
| public function importVersionsForFile(IUser $user, Node $source, Node $target, array $versions): void; | ||
|
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| /** | ||
| * Clear all versions for a file | ||
| * | ||
| * @since 29.0.0 | ||
| */ | ||
| public function clearVersionsForFile(IUser $user, Node $source, Node $target): void; | ||
| } |
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