use share initiator as fall back to access the file

in case of federated re-shares the owner can be a remote user.
Therefore we can't always use to owner to access the local file

apps/federatedfilesharing/lib/AppInfo/Application.php

@@ -81,7 +81,8 @@ class Application extends App {
 			\OC::$server->getL10N('federatedfilesharing'),
 			\OC::$server->getLogger(),
 			\OC::$server->getLazyRootFolder(),
-			\OC::$server->getConfig()
+			\OC::$server->getConfig(),
+			\OC::$server->getUserManager()
 		);
 	}
 

apps/federatedfilesharing/lib/FederatedShareProvider.php

@@ -23,13 +23,12 @@
 
 namespace OCA\FederatedFileSharing;
 
-use OC\Files\View;
 use OC\Share20\Share;
 use OCP\Files\IRootFolder;
-use OCP\IAppConfig;
 use OCP\IConfig;
 use OCP\IL10N;
 use OCP\ILogger;
+use OCP\IUserManager;
 use OCP\Share\IShare;
 use OCP\Share\IShareProvider;
 use OC\Share20\Exception\InvalidShare;
@@ -74,6 +73,9 @@ class FederatedShareProvider implements IShareProvider {
 	/** @var string */
 	private $externalShareTable = 'share_external';
 
+	/** @var IUserManager */
+	private $userManager;
+
 	/**
 	 * DefaultShareProvider constructor.
 	 *
@@ -85,6 +87,7 @@ class FederatedShareProvider implements IShareProvider {
 	 * @param ILogger $logger
 	 * @param IRootFolder $rootFolder
 	 * @param IConfig $config
+	 * @param IUserManager $userManager
 	 */
 	public function __construct(
 			IDBConnection $connection,
@@ -94,7 +97,8 @@ class FederatedShareProvider implements IShareProvider {
 			IL10N $l10n,
 			ILogger $logger,
 			IRootFolder $rootFolder,
-			IConfig $config
+			IConfig $config,
+			IUserManager $userManager
 	) {
 		$this->dbConnection = $connection;
 		$this->addressHandler = $addressHandler;
@@ -104,6 +108,7 @@ class FederatedShareProvider implements IShareProvider {
 		$this->logger = $logger;
 		$this->rootFolder = $rootFolder;
 		$this->config = $config;
+		$this->userManager = $userManager;
 	}
 
 	/**
@@ -699,7 +704,7 @@ class FederatedShareProvider implements IShareProvider {
 	 */
 	private function createShare($data) {
 
-		$share = new Share($this->rootFolder);
+		$share = new Share($this->rootFolder, $this->userManager);
 		$share->setId((int)$data['id'])
 			->setShareType((int)$data['share_type'])
 			->setPermissions((int)$data['permissions'])

apps/federatedfilesharing/tests/FederatedShareProviderTest.php

@@ -30,6 +30,7 @@ use OCP\IConfig;
 use OCP\IDBConnection;
 use OCP\IL10N;
 use OCP\ILogger;
+use OCP\IUserManager;
 use OCP\Share\IManager;
 
 /**
@@ -56,6 +57,8 @@ class FederatedShareProviderTest extends \Test\TestCase {
 	protected $rootFolder;
 	/** @var  IConfig | \PHPUnit_Framework_MockObject_MockObject */
 	protected $config;
+	/** @var  IUserManager | \PHPUnit_Framework_MockObject_MockObject */
+	protected $userManager;
 
 	/** @var IManager */
 	protected $shareManager;
@@ -81,7 +84,9 @@ class FederatedShareProviderTest extends \Test\TestCase {
 		$this->logger = $this->getMock('OCP\ILogger');
 		$this->rootFolder = $this->getMock('OCP\Files\IRootFolder');
 		$this->config = $this->getMock('OCP\IConfig');
-		$this->addressHandler = new AddressHandler(\OC::$server->getURLGenerator(), $this->l);
+		$this->userManager = $this->getMock('OCP\IUserManager');
+		//$this->addressHandler = new AddressHandler(\OC::$server->getURLGenerator(), $this->l);
+		$this->addressHandler = $this->getMockBuilder('OCA\FederatedFileSharing\AddressHandler')->disableOriginalConstructor()->getMock();
 
 		$this->userManager->expects($this->any())->method('userExists')->willReturn(true);
 
@@ -93,7 +98,8 @@ class FederatedShareProviderTest extends \Test\TestCase {
 			$this->l,
 			$this->logger,
 			$this->rootFolder,
-			$this->config
+			$this->config,
+			$this->userManager
 		);
 
 		$this->shareManager = \OC::$server->getShareManager();
@@ -120,6 +126,11 @@ class FederatedShareProviderTest extends \Test\TestCase {
 
 		$this->tokenHandler->method('generateToken')->willReturn('token');
 
+		$this->addressHandler->expects($this->any())->method('generateRemoteURL')
+			->willReturn('http://localhost/');
+		$this->addressHandler->expects($this->any())->method('splitUserRemote')
+			->willReturn(['user', 'server.com']);
+
 		$this->notifications->expects($this->once())
 			->method('sendRemoteShare')
 			->with(
@@ -186,6 +197,11 @@ class FederatedShareProviderTest extends \Test\TestCase {
 
 		$this->tokenHandler->method('generateToken')->willReturn('token');
 
+		$this->addressHandler->expects($this->any())->method('generateRemoteURL')
+			->willReturn('http://localhost/');
+		$this->addressHandler->expects($this->any())->method('splitUserRemote')
+			->willReturn(['user', 'server.com']);
+
 		$this->notifications->expects($this->once())
 			->method('sendRemoteShare')
 			->with(
@@ -233,7 +249,10 @@ class FederatedShareProviderTest extends \Test\TestCase {
 		$node->method('getId')->willReturn(42);
 		$node->method('getName')->willReturn('myFile');
 
-		$shareWith = 'sharedBy@' . $this->addressHandler->generateRemoteURL();
+		$this->addressHandler->expects($this->any())->method('compareAddresses')
+			->willReturn(true);
+
+		$shareWith = 'sharedBy@localhost';
 
 		$share->setSharedWith($shareWith)
 			->setSharedBy('sharedBy')
@@ -269,6 +288,10 @@ class FederatedShareProviderTest extends \Test\TestCase {
 		$node->method('getId')->willReturn(42);
 		$node->method('getName')->willReturn('myFile');
 
+
+		$this->addressHandler->expects($this->any())->method('splitUserRemote')
+			->willReturn(['user', 'server.com']);
+
 		$share->setSharedWith('user@server.com')
 			->setSharedBy('sharedBy')
 			->setShareOwner('shareOwner')
@@ -277,6 +300,9 @@ class FederatedShareProviderTest extends \Test\TestCase {
 
 		$this->tokenHandler->method('generateToken')->willReturn('token');
 
+		$this->addressHandler->expects($this->any())->method('generateRemoteURL')
+			->willReturn('http://localhost/');
+
 		$this->notifications->expects($this->once())
 			->method('sendRemoteShare')
 			->with(
@@ -328,6 +354,10 @@ class FederatedShareProviderTest extends \Test\TestCase {
 		$node->method('getId')->willReturn(42);
 		$node->method('getName')->willReturn('myFile');
 
+
+		$this->addressHandler->expects($this->any())->method('splitUserRemote')
+			->willReturn(['user', 'server.com']);
+
 		$share->setSharedWith('user@server.com')
 			->setSharedBy($sharedBy)
 			->setShareOwner($owner)
@@ -335,6 +365,8 @@ class FederatedShareProviderTest extends \Test\TestCase {
 			->setNode($node);
 
 		$this->tokenHandler->method('generateToken')->willReturn('token');
+		$this->addressHandler->expects($this->any())->method('generateRemoteURL')
+			->willReturn('http://localhost/');
 
 		$this->notifications->expects($this->once())
 			->method('sendRemoteShare')
@@ -379,6 +411,12 @@ class FederatedShareProviderTest extends \Test\TestCase {
 		$node->method('getId')->willReturn(42);
 		$node->method('getName')->willReturn('myFile');
 
+		$this->addressHandler->expects($this->at(0))->method('splitUserRemote')
+			->willReturn(['user', 'server.com']);
+
+		$this->addressHandler->expects($this->at(1))->method('splitUserRemote')
+			->willReturn(['user2', 'server.com']);
+
 		$this->tokenHandler->method('generateToken')->willReturn('token');
 		$this->notifications
 			->method('sendRemoteShare')
@@ -485,6 +523,14 @@ class FederatedShareProviderTest extends \Test\TestCase {
 		$node->method('getId')->willReturn(42);
 		$node->method('getName')->willReturn('myFile');
 
+		$this->addressHandler->expects($this->any())->method('splitUserRemote')
+			->willReturnCallback(function ($uid) {
+				if ($uid === 'user@server.com') {
+					return ['user', 'server.com'];
+				}
+				return ['user2', 'server.com'];
+		});
+
 		$this->tokenHandler->method('generateToken')->willReturn('token');
 		$this->notifications
 			->method('sendRemoteShare')

apps/files_sharing/api/share20ocs.php

@@ -99,7 +99,15 @@ class Share20OCS {
 	 */
 	protected function formatShare(\OCP\Share\IShare $share) {
 		$sharedBy = $this->userManager->get($share->getSharedBy());
-		$shareOwner = $this->userManager->get($share->getShareOwner());
+		// for federated shares the owner can be a remote user, in this
+		// case we use the initiator
+		if ($this->userManager->userExists($share->getShareOwner())) {
+			$shareOwner = $this->userManager->get($share->getShareOwner());
+			$localUser = $share->getShareOwner();
+		} else {
+			$shareOwner = $this->userManager->get($share->getSharedBy());
+			$localUser = $share->getSharedBy();
+		}
 		$result = [
 			'id' => $share->getId(),
 			'share_type' => $share->getShareType(),
@@ -115,7 +123,7 @@ class Share20OCS {
 		];
 
 		$node = $share->getNode();
-		$result['path'] = $this->rootFolder->getUserFolder($share->getShareOwner())->getRelativePath($node->getPath());
+		$result['path'] = $this->rootFolder->getUserFolder($localUser)->getRelativePath($node->getPath());
 		if ($node instanceOf \OCP\Files\Folder) {
 			$result['item_type'] = 'folder';
 		} else {

apps/files_sharing/tests/api/share20ocstest.php

@@ -82,6 +82,8 @@ class Share20OCSTest extends \Test\TestCase {
 		$this->currentUser = $this->getMock('OCP\IUser');
 		$this->currentUser->method('getUID')->willReturn('currentUser');
 
+		$this->userManager->expects($this->any())->method('userExists')->willReturn(true);
+
 		$this->l = $this->getMock('\OCP\IL10N');
 		$this->l->method('t')
 			->will($this->returnCallback(function($text, $parameters = []) {

lib/private/Share20/DefaultShareProvider.php

@@ -733,7 +733,7 @@ class DefaultShareProvider implements IShareProvider {
 	 * @throws InvalidShare
 	 */
 	private function createShare($data) {
-		$share = new Share($this->rootFolder);
+		$share = new Share($this->rootFolder, $this->userManager);
 		$share->setId((int)$data['id'])
 			->setShareType((int)$data['share_type'])
 			->setPermissions((int)$data['permissions'])

lib/private/Share20/Manager.php

@@ -201,7 +201,12 @@ class Manager implements IManager {
 		}
 
 		// And you can't share your rootfolder
-		if ($this->rootFolder->getUserFolder($share->getSharedBy())->getPath() === $share->getNode()->getPath()) {
+		if ($this->userManager->userExists($share->getSharedBy())) {
+			$sharedPath = $this->rootFolder->getUserFolder($share->getSharedBy())->getPath();
+		} else {
+			$sharedPath = $this->rootFolder->getUserFolder($share->getShareOwner())->getPath();
+		}
+		if ($sharedPath === $share->getNode()->getPath()) {
 			throw new \InvalidArgumentException('You can\'t share your root folder');
 		}
 
@@ -713,7 +718,11 @@ class Manager implements IManager {
 		}
 
 		if ($share->getPermissions() !== $originalShare->getPermissions()) {
-			$userFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
+			if ($this->userManager->userExists($share->getShareOwner())) {
+				$userFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
+			} else {
+				$userFolder = $this->rootFolder->getUserFolder($share->getSharedBy());
+			}
 			\OC_Hook::emit('OCP\Share', 'post_update_permissions', array(
 				'itemType' => $share->getNode() instanceof \OCP\Files\File ? 'file' : 'folder',
 				'itemSource' => $share->getNode()->getId(),
@@ -1107,7 +1116,7 @@ class Manager implements IManager {
 	 * @return \OCP\Share\IShare;
 	 */
 	public function newShare() {
-		return new \OC\Share20\Share($this->rootFolder);
+		return new \OC\Share20\Share($this->rootFolder, $this->userManager);
 	}
 
 	/**

lib/private/Share20/ProviderFactory.php

@@ -115,7 +115,8 @@ class ProviderFactory implements IProviderFactory {
 				$l,
 				$this->serverContainer->getLogger(),
 				$this->serverContainer->getLazyRootFolder(),
-				$this->serverContainer->getConfig()
+				$this->serverContainer->getConfig(),
+				$this->serverContainer->getUserManager()
 			);
 		}
 

lib/private/Share20/Share.php

@@ -24,8 +24,7 @@ use OCP\Files\File;
 use OCP\Files\IRootFolder;
 use OCP\Files\Node;
 use OCP\Files\NotFoundException;
-use OCP\IUser;
-use OCP\IGroup;
+use OCP\IUserManager;
 use OCP\Share\Exceptions\IllegalIDChangeException;
 
 class Share implements \OCP\Share\IShare {
@@ -68,8 +67,12 @@ class Share implements \OCP\Share\IShare {
 	/** @var IRootFolder */
 	private $rootFolder;
 
-	public function __construct(IRootFolder $rootFolder) {
+	/** @var IUserManager */
+	private $userManager;
+
+	public function __construct(IRootFolder $rootFolder, IUserManager $userManager) {
 		$this->rootFolder = $rootFolder;
+		$this->userManager = $userManager;
 	}
 
 	/**
@@ -145,7 +148,13 @@ class Share implements \OCP\Share\IShare {
 				throw new NotFoundException();
 			}
 
-			$userFolder = $this->rootFolder->getUserFolder($this->shareOwner);
+			// for federated shares the owner can be a remote user, in this
+			// case we use the initiator
+			if($this->userManager->userExists($this->shareOwner)) {
+				$userFolder = $this->rootFolder->getUserFolder($this->shareOwner);
+			} else {
+				$userFolder = $this->rootFolder->getUserFolder($this->sharedBy);
+			}
 
 			$nodes = $userFolder->getById($this->fileId);
 			if (empty($nodes)) {

tests/lib/Share20/DefaultShareProviderTest.php

@@ -57,6 +57,8 @@ class DefaultShareProviderTest extends \Test\TestCase {
 		$this->groupManager = $this->getMock('OCP\IGroupManager');
 		$this->rootFolder = $this->getMock('OCP\Files\IRootFolder');
 
+		$this->userManager->expects($this->any())->method('userExists')->willReturn(true);
+
 		//Empty share table
 		$this->dbConn->getQueryBuilder()->delete('share')->execute();
 
@@ -587,7 +589,7 @@ class DefaultShareProviderTest extends \Test\TestCase {
 	}
 
 	public function testCreateUserShare() {
-		$share = new \OC\Share20\Share($this->rootFolder);
+		$share = new \OC\Share20\Share($this->rootFolder, $this->userManager);
 
 		$shareOwner = $this->getMock('OCP\IUser');
 		$shareOwner->method('getUID')->WillReturn('shareOwner');
@@ -635,7 +637,7 @@ class DefaultShareProviderTest extends \Test\TestCase {
 	}
 
 	public function testCreateGroupShare() {
-		$share = new \OC\Share20\Share($this->rootFolder);
+		$share = new \OC\Share20\Share($this->rootFolder, $this->userManager);
 
 		$shareOwner = $this->getMock('\OCP\IUser');
 		$shareOwner->method('getUID')->willReturn('shareOwner');
@@ -683,7 +685,7 @@ class DefaultShareProviderTest extends \Test\TestCase {
 	}
 
 	public function testCreateLinkShare() {
-		$share = new \OC\Share20\Share($this->rootFolder);
+		$share = new \OC\Share20\Share($this->rootFolder, $this->userManager);
 
 		$shareOwner = $this->getMock('\OCP\IUser');
 		$shareOwner->method('getUID')->willReturn('shareOwner');

tests/lib/Share20/ManagerTest.php

@@ -2283,6 +2283,9 @@ class ManagerTest extends \Test\TestCase {
 	}
 
 	public function testUpdateShareUser() {
+
+		$this->userManager->expects($this->any())->method('userExists')->willReturn(true);
+
 		$manager = $this->createManagerMock()
 			->setMethods([
 				'canShare',
@@ -2567,4 +2570,4 @@ class DummyFactory implements IProviderFactory {
 	public function getProviderForType($shareType) {
 		return $this->provider;
 	}
-}
+}

tests/lib/Share20/ShareTest.php

@@ -36,7 +36,8 @@ class ShareTest extends \Test\TestCase {
 
 	public function setUp() {
 		$this->rootFolder = $this->getMock('\OCP\Files\IRootFolder');
-		$this->share = new \OC\Share20\Share($this->rootFolder);
+		$this->userManager = $this->getMock('OCP\IUserManager');
+		$this->share = new \OC\Share20\Share($this->rootFolder, $this->userManager);
 	}
 
 	/**