delete all server-to-server shares if a user gets deleted

apps/files_sharing/lib/external/manager.php

@@ -260,6 +260,33 @@ class Manager {
 		return (bool)$query->execute(array($hash, $user->getUID()));
 	}
 
+	/**
+	 * remove all shares for user $uid if the user was deleted
+	 *
+	 * @param string $uid
+	 * @return bool
+	 */
+	public function removeUserShares($uid) {
+		$getShare = $this->connection->prepare('
+			SELECT `remote`, `share_token`, `remote_id`
+			FROM  `*PREFIX*share_external`
+			WHERE `user` = ?');
+		$result = $getShare->execute(array($uid));
+
+		if ($result) {
+			$shares = $getShare->fetchAll();
+			foreach($shares as $share) {
+				$this->sendFeedbackToRemote($share['remote'], $share['share_token'], $share['remote_id'], 'decline');
+			}
+		}
+
+		$query = $this->connection->prepare('
+			DELETE FROM `*PREFIX*share_external`
+			WHERE `user` = ?
+		');
+		return (bool)$query->execute(array($uid));
+	}
+
 	/**
 	 * return a list of shares which are not yet accepted by the user
 	 *

apps/files_sharing/lib/helper.php

@@ -16,6 +16,8 @@ class Helper {
 		\OCP\Util::connectHook('OCP\Share', 'post_shared', '\OC\Files\Cache\Shared_Updater', 'postShareHook');
 		\OCP\Util::connectHook('OCP\Share', 'post_unshare', '\OC\Files\Cache\Shared_Updater', 'postUnshareHook');
 		\OCP\Util::connectHook('OCP\Share', 'post_unshareFromSelf', '\OC\Files\Cache\Shared_Updater', 'postUnshareFromSelfHook');
+
+		\OCP\Util::connectHook('OC_User', 'post_deleteUser', '\OCA\Files_Sharing\Hooks', 'deleteUser');
 	}
 
 	/**

apps/files_sharing/lib/hooks.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * ownCloud
+ *
+ * @copyright (C) 2015 ownCloud, Inc.
+ *
+ * @author Bjoern Schiessle <schiessle@owncloud.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library 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 library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCA\Files_Sharing;
+
+class Hooks {
+
+	public static function deleteUser($params) {
+		$manager = new External\Manager(
+			\OC::$server->getDatabaseConnection(),
+			\OC\Files\Filesystem::getMountManager(),
+			\OC\Files\Filesystem::getLoader(),
+			\OC::$server->getUserSession(),
+			\OC::$server->getHTTPHelper());
+
+		$manager->removeUserShares($params['uid']);
+	}
+
+}

apps/files_sharing/tests/server2server.php

@@ -30,6 +30,14 @@ class Test_Files_Sharing_S2S_OCS_API extends TestCase {
 
 	const TEST_FOLDER_NAME = '/folder_share_api_test';
 
+	/**
+	 * @var \OCP\IDBConnection
+	 */
+	private $connection;
+
+	/**
+	 * @var \OCA\Files_Sharing\API\Server2Server
+	 */
 	private $s2s;
 
 	protected function setUp() {
@@ -49,6 +57,8 @@ class Test_Files_Sharing_S2S_OCS_API extends TestCase {
 		$this->registerHttpHelper($httpHelperMock);
 
 		$this->s2s = new \OCA\Files_Sharing\API\Server2Server();
+
+		$this->connection = \OC::$server->getDatabaseConnection();
 	}
 
 	protected function tearDown() {
@@ -132,4 +142,70 @@ class Test_Files_Sharing_S2S_OCS_API extends TestCase {
 		$data = $result->fetchAll();
 		$this->assertEmpty($data);
 	}
+
+	/**
+	 * @dataProvider dataTestDeleteUser
+	 */
+	function testDeleteUser($toDelete, $expected, $remainingUsers) {
+		$this->createDummyS2SShares();
+
+		$manager = new OCA\Files_Sharing\External\Manager(
+			\OC::$server->getDatabaseConnection(),
+			\OC\Files\Filesystem::getMountManager(),
+			\OC\Files\Filesystem::getLoader(),
+			\OC::$server->getUserSession(),
+			\OC::$server->getHTTPHelper());
+
+		$manager->removeUserShares($toDelete);
+
+		$query = $this->connection->prepare('SELECT `user` FROM `*PREFIX*share_external`');
+		$query->execute();
+		$result = $query->fetchAll();
+
+		foreach ($result as $r) {
+			$remainingShares[$r['user']] = isset($remainingShares[$r['user']]) ? $remainingShares[$r['user']] + 1 : 1;
+		}
+
+		$this->assertSame($remainingUsers, count($remainingShares));
+
+		foreach ($expected as $key => $value) {
+			if ($key === $toDelete) {
+				$this->assertArrayNotHasKey($key, $remainingShares);
+			} else {
+				$this->assertSame($value, $remainingShares[$key]);
+			}
+		}
+
+	}
+
+	function dataTestDeleteUser() {
+		return array(
+			array('user1', array('user1' => 0, 'user2' => 3, 'user3' => 3), 2),
+			array('user2', array('user1' => 4, 'user2' => 0, 'user3' => 3), 2),
+			array('user3', array('user1' => 4, 'user2' => 3, 'user3' => 0), 2),
+			array('user4', array('user1' => 4, 'user2' => 3, 'user3' => 3), 3),
+		);
+	}
+
+	private function createDummyS2SShares() {
+		$query = $this->connection->prepare('
+			INSERT INTO `*PREFIX*share_external`
+			(`remote`, `share_token`, `password`, `name`, `owner`, `user`, `mountpoint`, `mountpoint_hash`, `remote_id`, `accepted`)
+			VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+			');
+
+		$users = array('user1', 'user2', 'user3');
+
+		for ($i = 0; $i < 10; $i++) {
+			$user = $users[$i%3];
+			$query->execute(array('remote', 'token', 'password', 'name', 'owner', $user, 'mount point', $i, $i, 0));
+		}
+
+		$query = $this->connection->prepare('SELECT `id` FROM `*PREFIX*share_external`');
+		$query->execute();
+		$dummyEntries = $query->fetchAll();
+
+		$this->assertSame(10, count($dummyEntries));
+	}
+
 }