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| 1 | +<?php |
| 2 | + |
| 3 | +declare(strict_types=1); |
| 4 | +/** |
| 5 | + * SPDX-FileCopyrightText: 2025 Robin Appelman <robin@icewind.nl> |
| 6 | + * SPDX-License-Identifier: AGPL-3.0-or-later |
| 7 | + */ |
| 8 | + |
| 9 | +namespace OCA\Files_Sharing\Listener; |
| 10 | + |
| 11 | +use OCA\Files_Sharing\Event\UserShareAccessUpdatedEvent; |
| 12 | +use OCA\Files_Sharing\MountProvider; |
| 13 | +use OCA\Files_Sharing\ShareTargetValidator; |
| 14 | +use OCP\Cache\CappedMemoryCache; |
| 15 | +use OCP\EventDispatcher\Event; |
| 16 | +use OCP\EventDispatcher\IEventListener; |
| 17 | +use OCP\Files\Config\ICachedMountInfo; |
| 18 | +use OCP\Files\Config\IUserMountCache; |
| 19 | +use OCP\Files\Events\Node\FilesystemTornDownEvent; |
| 20 | +use OCP\Group\Events\UserAddedEvent; |
| 21 | +use OCP\Group\Events\UserRemovedEvent; |
| 22 | +use OCP\IUser; |
| 23 | +use OCP\Share\Events\BeforeShareDeletedEvent; |
| 24 | +use OCP\Share\Events\ShareCreatedEvent; |
| 25 | +use OCP\Share\IManager; |
| 26 | + |
| 27 | +/** |
| 28 | + * Listen to various events that can change what shares a user has access to |
| 29 | + * |
| 30 | + * @template-implements IEventListener<UserAddedEvent|UserRemovedEvent|ShareCreatedEvent|BeforeShareDeletedEvent|UserShareAccessUpdatedEvent|FilesystemTornDownEvent> |
| 31 | + */ |
| 32 | +class SharesUpdatedListener implements IEventListener { |
| 33 | + private CappedMemoryCache $updatedUsers; |
| 34 | + |
| 35 | + public function __construct( |
| 36 | + private readonly IManager $shareManager, |
| 37 | + private readonly IUserMountCache $userMountCache, |
| 38 | + private readonly MountProvider $shareMountProvider, |
| 39 | + private readonly ShareTargetValidator $shareTargetValidator, |
| 40 | + ) { |
| 41 | + $this->updatedUsers = new CappedMemoryCache(); |
| 42 | + } |
| 43 | + public function handle(Event $event): void { |
| 44 | + if ($event instanceof FilesystemTornDownEvent) { |
| 45 | + $this->updatedUsers = new CappedMemoryCache(); |
| 46 | + } |
| 47 | + if ($event instanceof UserShareAccessUpdatedEvent) { |
| 48 | + foreach ($event->getUsers() as $user) { |
| 49 | + $this->updateForUser($user); |
| 50 | + } |
| 51 | + } |
| 52 | + if ($event instanceof UserAddedEvent || $event instanceof UserRemovedEvent) { |
| 53 | + $this->updateForUser($event->getUser()); |
| 54 | + } |
| 55 | + if ($event instanceof ShareCreatedEvent || $event instanceof BeforeShareDeletedEvent) { |
| 56 | + foreach ($this->shareManager->getUsersForShare($event->getShare()) as $user) { |
| 57 | + $this->updateForUser($user); |
| 58 | + } |
| 59 | + } |
| 60 | + } |
| 61 | + |
| 62 | + private function updateForUser(IUser $user): void { |
| 63 | + if (isset($this->updatedUsers[$user->getUID()])) { |
| 64 | + return; |
| 65 | + } |
| 66 | + $this->updatedUsers[$user->getUID()] = true; |
| 67 | + |
| 68 | + $cachedMounts = $this->userMountCache->getMountsForUser($user); |
| 69 | + $mountPoints = array_map(fn (ICachedMountInfo $mount) => $mount->getMountPoint(), $cachedMounts); |
| 70 | + $mountsByPath = array_combine($mountPoints, $cachedMounts); |
| 71 | + |
| 72 | + $shares = $this->shareMountProvider->getSuperSharesForUser($user); |
| 73 | + |
| 74 | + foreach ($shares as &$share) { |
| 75 | + [$parentShare, $groupedShares] = $share; |
| 76 | + $mountPoint = '/' . $user->getUID() . '/files/' . trim($parentShare->getTarget(), '/') . '/'; |
| 77 | + $mountKey = $parentShare->getNodeId() . '::' . $mountPoint; |
| 78 | + if (!isset($cachedMounts[$mountKey])) { |
| 79 | + $this->shareTargetValidator->verifyMountPoint($user, $parentShare, $mountsByPath, $groupedShares); |
| 80 | + } |
| 81 | + } |
| 82 | + } |
| 83 | +} |
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