[stable27] Apply group limit on remove from group

lib/private/Share20/DefaultShareProvider.php

@@ -53,6 +53,7 @@
 use OCP\Mail\IMailer;
 use OCP\Share\Exceptions\ShareNotFound;
 use OCP\Share\IAttributes;
+use OCP\Share\IManager;
 use OCP\Share\IShare;
 use OCP\Share\IShareProvider;
 use function str_starts_with;
@@ -94,15 +95,17 @@ class DefaultShareProvider implements IShareProvider {
 	private $config;
 
 	public function __construct(
-			IDBConnection $connection,
-			IUserManager $userManager,
-			IGroupManager $groupManager,
-			IRootFolder $rootFolder,
-			IMailer $mailer,
-			Defaults $defaults,
-			IFactory $l10nFactory,
-			IURLGenerator $urlGenerator,
-			IConfig $config) {
+		IDBConnection $connection,
+		IUserManager $userManager,
+		IGroupManager $groupManager,
+		IRootFolder $rootFolder,
+		IMailer $mailer,
+		Defaults $defaults,
+		IFactory $l10nFactory,
+		IURLGenerator $urlGenerator,
+		IConfig $config,
+		private IManager $shareManager,
+	) {
 		$this->dbConn = $connection;
 		$this->userManager = $userManager;
 		$this->groupManager = $groupManager;
@@ -1302,6 +1305,7 @@ public function groupDeleted($gid) {
 	 *
 	 * @param string $uid
 	 * @param string $gid
+	 * @return void
 	 */
 	public function userDeletedFromGroup($uid, $gid) {
 		/*
@@ -1313,7 +1317,7 @@ public function userDeletedFromGroup($uid, $gid) {
 			->where($qb->expr()->eq('share_type', $qb->createNamedParameter(IShare::TYPE_GROUP)))
 			->andWhere($qb->expr()->eq('share_with', $qb->createNamedParameter($gid)));
 
-		$cursor = $qb->execute();
+		$cursor = $qb->executeQuery();
 		$ids = [];
 		while ($row = $cursor->fetch()) {
 			$ids[] = (int)$row['id'];
@@ -1330,7 +1334,45 @@ public function userDeletedFromGroup($uid, $gid) {
 					->where($qb->expr()->eq('share_type', $qb->createNamedParameter(IShare::TYPE_USERGROUP)))
 					->andWhere($qb->expr()->eq('share_with', $qb->createNamedParameter($uid)))
 					->andWhere($qb->expr()->in('parent', $qb->createNamedParameter($chunk, IQueryBuilder::PARAM_INT_ARRAY)));
-				$qb->execute();
+				$qb->executeStatement();
+			}
+		}
+
+		if ($this->shareManager->shareWithGroupMembersOnly()) {
+			$user = $this->userManager->get($uid);
+			if ($user === null) {
+				return;
+			}
+			$userGroups = $this->groupManager->getUserGroupIds($user);
+
+			// Delete user shares received by the user from users in the group.
+			$userReceivedShares = $this->shareManager->getSharedWith($uid, IShare::TYPE_USER, null, -1);
+			foreach ($userReceivedShares as $share) {
+				$owner = $this->userManager->get($share->getSharedBy());
+				if ($owner === null) {
+					continue;
+				}
+				$ownerGroups = $this->groupManager->getUserGroupIds($owner);
+				$mutualGroups = array_intersect($userGroups, $ownerGroups);
+
+				if (count($mutualGroups) === 0) {
+					$this->shareManager->deleteShare($share);
+				}
+			}
+
+			// Delete user shares from the user to users in the group.
+			$userEmittedShares = $this->shareManager->getSharesBy($uid, IShare::TYPE_USER, null, true, -1);
+			foreach ($userEmittedShares as $share) {
+				$recipient = $this->userManager->get($share->getSharedWith());
+				if ($recipient === null) {
+					continue;
+				}
+				$recipientGroups = $this->groupManager->getUserGroupIds($recipient);
+				$mutualGroups = array_intersect($userGroups, $recipientGroups);
+
+				if (count($mutualGroups) === 0) {
+					$this->shareManager->deleteShare($share);
+				}
 			}
 		}
 	}

lib/private/Share20/ProviderFactory.php

@@ -104,7 +104,8 @@ protected function defaultShareProvider() {
 				$this->serverContainer->query(Defaults::class),
 				$this->serverContainer->getL10NFactory(),
 				$this->serverContainer->getURLGenerator(),
-				$this->serverContainer->getConfig()
+				$this->serverContainer->getConfig(),
+				$this->serverContainer->get(IManager::class),
 			);
 		}
 

tests/lib/Share20/DefaultShareProviderTest.php

@@ -39,6 +39,7 @@
 use OCP\IUserManager;
 use OCP\L10N\IFactory;
 use OCP\Mail\IMailer;
+use OCP\Share\IManager as IShareManager;
 use OCP\Share\IShare;
 use PHPUnit\Framework\MockObject\MockObject;
 
@@ -82,6 +83,9 @@ class DefaultShareProviderTest extends \Test\TestCase {
 	/** @var IConfig|MockObject */
 	protected $config;
 
+	/** @var IShareManager&MockObject */
+	protected $shareManager;
+
 	protected function setUp(): void {
 		$this->dbConn = \OC::$server->getDatabaseConnection();
 		$this->userManager = $this->createMock(IUserManager::class);
@@ -93,6 +97,7 @@ protected function setUp(): void {
 		$this->defaults = $this->getMockBuilder(Defaults::class)->disableOriginalConstructor()->getMock();
 		$this->urlGenerator = $this->createMock(IURLGenerator::class);
 		$this->config = $this->createMock(IConfig::class);
+		$this->shareManager = $this->createMock(IShareManager::class);
 
 		$this->userManager->expects($this->any())->method('userExists')->willReturn(true);
 
@@ -108,7 +113,8 @@ protected function setUp(): void {
 			$this->defaults,
 			$this->l10nFactory,
 			$this->urlGenerator,
-			$this->config
+			$this->config,
+			$this->shareManager,
 		);
 	}
 
@@ -132,8 +138,8 @@ protected function tearDown(): void {
 	 * @return int
 	 */
 	private function addShareToDB($shareType, $sharedWith, $sharedBy, $shareOwner,
-			$itemType, $fileSource, $fileTarget, $permissions, $token, $expiration,
-			$parent = null) {
+		$itemType, $fileSource, $fileTarget, $permissions, $token, $expiration,
+		$parent = null) {
 		$qb = $this->dbConn->getQueryBuilder();
 		$qb->insert('share');
 
@@ -469,7 +475,8 @@ public function testDeleteSingleShare() {
 				$this->defaults,
 				$this->l10nFactory,
 				$this->urlGenerator,
-				$this->config
+				$this->config,
+				$this->shareManager,
 			])
 			->setMethods(['getShareById'])
 			->getMock();
@@ -564,7 +571,8 @@ public function testDeleteGroupShareWithUserGroupShares() {
 				$this->defaults,
 				$this->l10nFactory,
 				$this->urlGenerator,
-				$this->config
+				$this->config,
+				$this->shareManager,
 			])
 			->setMethods(['getShareById'])
 			->getMock();
@@ -2524,7 +2532,8 @@ public function testGetSharesInFolder() {
 			$this->defaults,
 			$this->l10nFactory,
 			$this->urlGenerator,
-			$this->config
+			$this->config,
+			$this->shareManager,
 		);
 
 		$password = md5(time());
@@ -2622,7 +2631,8 @@ public function testGetAccessListNoCurrentAccessRequired() {
 			$this->defaults,
 			$this->l10nFactory,
 			$this->urlGenerator,
-			$this->config
+			$this->config,
+			$this->shareManager,
 		);
 
 		$u1 = $userManager->createUser('testShare1', 'test');
@@ -2718,7 +2728,8 @@ public function testGetAccessListCurrentAccessRequired() {
 			$this->defaults,
 			$this->l10nFactory,
 			$this->urlGenerator,
-			$this->config
+			$this->config,
+			$this->shareManager,
 		);
 
 		$u1 = $userManager->createUser('testShare1', 'test');