[stable32] perf(sharing): Avoid loading all shares from all users when unsharing

apps/files_sharing/tests/CapabilitiesTest.php

@@ -18,6 +18,7 @@
 use OCP\IAppConfig;
 use OCP\IConfig;
 use OCP\IDateTimeZone;
+use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\IURLGenerator;
 use OCP\IUserManager;
@@ -100,6 +101,7 @@ private function getResults(array $map, array $typedMap = [], bool $federationEn
 			$this->createMock(ShareDisableChecker::class),
 			$this->createMock(IDateTimeZone::class),
 			$appConfig,
+			$this->createMock(IDBConnection::class),
 		);
 
 		$cap = new Capabilities($config, $appConfig, $shareManager, $appManager);

apps/settings/tests/Settings/Admin/SharingTest.php

@@ -16,9 +16,11 @@
 use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\Share\IManager;
+use PHPUnit\Framework\Attributes\Group;
 use PHPUnit\Framework\MockObject\MockObject;
 use Test\TestCase;
 
+#[Group(name: 'DB')]
 class SharingTest extends TestCase {
 	private Sharing $admin;
 

lib/private/Share20/DefaultShareProvider.php

@@ -987,7 +987,7 @@ public function getShareByToken($token) {
 	 * @return \OCP\Share\IShare
 	 * @throws InvalidShare
 	 */
-	private function createShare($data) {
+	private function createShare($data): IShare {
 		$share = new Share($this->rootFolder, $this->userManager);
 		$share->setId((int)$data['id'])
 			->setShareType((int)$data['share_type'])

lib/private/Share20/Manager.php

@@ -14,6 +14,7 @@
 use OCA\Files_Sharing\AppInfo\Application;
 use OCA\Files_Sharing\SharedStorage;
 use OCA\ShareByMail\ShareByMailProvider;
+use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\File;
@@ -27,6 +28,7 @@
 use OCP\IAppConfig;
 use OCP\IConfig;
 use OCP\IDateTimeZone;
+use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\IL10N;
 use OCP\IURLGenerator;
@@ -86,6 +88,7 @@ public function __construct(
 		private ShareDisableChecker $shareDisableChecker,
 		private IDateTimeZone $dateTimeZone,
 		private IAppConfig $appConfig,
+		private IDBConnection $connection,
 	) {
 		$this->l = $this->l10nFactory->get('lib');
 		// The constructor of LegacyHooks registers the listeners of share events
@@ -1068,35 +1071,76 @@ protected function promoteReshares(IShare $share): void {
 			IShare::TYPE_EMAIL,
 		];
 
-		foreach ($userIds as $userId) {
-			foreach ($shareTypes as $shareType) {
+		// Figure out which users has some shares with which providers
+		$qb = $this->connection->getQueryBuilder();
+		$qb->select('uid_initiator', 'share_type', 'uid_owner', 'file_source')
+			->from('share')
+			->andWhere($qb->expr()->in('item_type', $qb->createNamedParameter(['file', 'folder'], IQueryBuilder::PARAM_STR_ARRAY)))
+			->andWhere($qb->expr()->in('share_type', $qb->createNamedParameter($shareTypes, IQueryBuilder::PARAM_INT_ARRAY)))
+			->andWhere(
+				$qb->expr()->orX(
+					$qb->expr()->in('uid_initiator', $qb->createNamedParameter($userIds, IQueryBuilder::PARAM_STR_ARRAY)),
+					// Special case for old shares created via the web UI
+					$qb->expr()->andX(
+						$qb->expr()->in('uid_owner', $qb->createNamedParameter($userIds, IQueryBuilder::PARAM_STR_ARRAY)),
+						$qb->expr()->isNull('uid_initiator')
+					)
+				)
+			);
+
+		if (!$node instanceof Folder) {
+			$qb->andWhere($qb->expr()->eq('file_source', $qb->createNamedParameter($node->getId(), IQueryBuilder::PARAM_INT)));
+		}
+
+		$qb->orderBy('id');
+
+		$cursor = $qb->executeQuery();
+		/** @var array<string, list<array{IShare::TYPE_*, Node}>> $rawShare */
+		$rawShares = [];
+		while ($data = $cursor->fetch()) {
+			if (!isset($rawShares[$data['uid_initiator']])) {
+				$rawShares[$data['uid_initiator']] = [];
+			}
+			if (!in_array($data['share_type'], $rawShares[$data['uid_initiator']], true)) {
+				if ($node instanceof Folder) {
+					if ($data['file_source'] === null || $data['uid_owner'] === null) {
+						/* Ignore share of non-existing node */
+						continue;
+					}
+
+					// for federated shares the owner can be a remote user, in this
+					// case we use the initiator
+					if ($this->userManager->userExists($data['uid_owner'])) {
+						$userFolder = $this->rootFolder->getUserFolder($data['uid_owner']);
+					} else {
+						$userFolder = $this->rootFolder->getUserFolder($data['uid_initiator']);
+					}
+					$sharedNode = $userFolder->getFirstNodeById((int)$data['file_source']);
+					if (!$sharedNode) {
+						continue;
+					}
+					if ($node->getRelativePath($sharedNode->getPath()) !== null) {
+						$rawShares[$data['uid_initiator']][] = [(int)$data['share_type'], $sharedNode];
+					}
+				} elseif ($node instanceof File) {
+					$rawShares[$data['uid_initiator']][] = [(int)$data['share_type'], $node];
+				}
+			}
+		}
+		$cursor->closeCursor();
+
+		foreach ($rawShares as $userId => $shareInfos) {
+			foreach ($shareInfos as $shareInfo) {
+				[$shareType, $sharedNode] = $shareInfo;
 				try {
 					$provider = $this->factory->getProviderForType($shareType);
-				} catch (ProviderException $e) {
+				} catch (ProviderException) {
 					continue;
 				}
 
-				if ($node instanceof Folder) {
-					/* We need to get all shares by this user to get subshares */
-					$shares = $provider->getSharesBy($userId, $shareType, null, false, -1, 0);
-
-					foreach ($shares as $share) {
-						try {
-							$path = $share->getNode()->getPath();
-						} catch (NotFoundException) {
-							/* Ignore share of non-existing node */
-							continue;
-						}
-						if ($node->getRelativePath($path) !== null) {
-							/* If relative path is not null it means the shared node is the same or in a subfolder */
-							$reshareRecords[] = $share;
-						}
-					}
-				} else {
-					$shares = $provider->getSharesBy($userId, $shareType, $node, false, -1, 0);
-					foreach ($shares as $child) {
-						$reshareRecords[] = $child;
-					}
+				$shares = $provider->getSharesBy($userId, $shareType, $sharedNode, false, -1, 0);
+				foreach ($shares as $child) {
+					$reshareRecords[] = $child;
 				}
 			}
 		}

tests/lib/Share20/LegacyHooksTest.php

@@ -9,7 +9,6 @@
 
 use OC\EventDispatcher\EventDispatcher;
 use OC\Share20\LegacyHooks;
-use OC\Share20\Manager;
 use OCP\Constants;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\Cache\ICacheEntry;
@@ -24,6 +23,7 @@
 use OCP\Share\IManager as IShareManager;
 use OCP\Share\IShare;
 use OCP\Util;
+use PHPUnit\Framework\Attributes\Group;
 use Psr\Log\LoggerInterface;
 use Test\TestCase;
 
@@ -40,15 +40,11 @@ public function pre() {
 	}
 }
 
+#[Group(name: 'DB')]
 class LegacyHooksTest extends TestCase {
-	/** @var LegacyHooks */
-	private $hooks;
-
-	/** @var IEventDispatcher */
-	private $eventDispatcher;
-
-	/** @var Manager */
-	private $manager;
+	private LegacyHooks $hooks;
+	private IEventDispatcher $eventDispatcher;
+	private IShareManager $manager;
 
 	protected function setUp(): void {
 		parent::setUp();