move request handler for federated shares to the federated sharing app

1 files changed, 332 insertions, 0 deletions

diff --git a/apps/federatedfilesharing/lib/RequestHandler.php b/apps/federatedfilesharing/lib/RequestHandler.php
new file mode 100644
index 00000000000..65925c3823c
--- /dev/null
+++ b/apps/federatedfilesharing/lib/RequestHandler.php
@@ -0,0 +1,332 @@
+<?php
+/**
+ * @author Arthur Schiwon <blizzz@owncloud.com>
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Lukas Reschke <lukas@owncloud.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\FederatedFileSharing;
+
+use OCA\FederatedFileSharing\DiscoveryManager;
+use OCA\FederatedFileSharing\FederatedShareProvider;
+use OCA\Files_Sharing\Activity;
+use OCP\Files\NotFoundException;
+
+/**
+ * Class RequestHandler
+ * 
+ * handles OCS Request to the federated share API
+ *
+ * @package OCA\FederatedFileSharing\API
+ */
+class RequestHandler {
+
+	/** @var FederatedShareProvider */
+	private $federatedShareProvider;
+
+
+	/**
+	 * Server2Server constructor.
+	 *
+	 * @param FederatedShareProvider $federatedShareProvider
+	 */
+	public function __construct(FederatedShareProvider $federatedShareProvider) {
+		$this->federatedShareProvider = $federatedShareProvider;
+	}
+
+	/**
+	 * create a new share
+	 *
+	 * @param array $params
+	 * @return \OC_OCS_Result
+	 */
+	public function createShare($params) {
+
+		if (!$this->isS2SEnabled(true)) {
+			return new \OC_OCS_Result(null, 503, 'Server does not support federated cloud sharing');
+		}
+
+		$remote = isset($_POST['remote']) ? $_POST['remote'] : null;
+		$token = isset($_POST['token']) ? $_POST['token'] : null;
+		$name = isset($_POST['name']) ? $_POST['name'] : null;
+		$owner = isset($_POST['owner']) ? $_POST['owner'] : null;
+		$shareWith = isset($_POST['shareWith']) ? $_POST['shareWith'] : null;
+		$remoteId = isset($_POST['remoteId']) ? (int)$_POST['remoteId'] : null;
+
+		if ($remote && $token && $name && $owner && $remoteId && $shareWith) {
+
+			if(!\OCP\Util::isValidFileName($name)) {
+				return new \OC_OCS_Result(null, 400, 'The mountpoint name contains invalid characters.');
+			}
+
+			// FIXME this should be a method in the user management instead
+			\OCP\Util::writeLog('files_sharing', 'shareWith before, ' . $shareWith, \OCP\Util::DEBUG);
+			\OCP\Util::emitHook(
+				'\OCA\Files_Sharing\API\Server2Server',
+				'preLoginNameUsedAsUserName',
+				array('uid' => &$shareWith)
+			);
+			\OCP\Util::writeLog('files_sharing', 'shareWith after, ' . $shareWith, \OCP\Util::DEBUG);
+
+			if (!\OCP\User::userExists($shareWith)) {
+				return new \OC_OCS_Result(null, 400, 'User does not exists');
+			}
+
+			\OC_Util::setupFS($shareWith);
+
+			$discoveryManager = new DiscoveryManager(
+				\OC::$server->getMemCacheFactory(),
+				\OC::$server->getHTTPClientService()
+			);
+			$externalManager = new \OCA\Files_Sharing\External\Manager(
+					\OC::$server->getDatabaseConnection(),
+					\OC\Files\Filesystem::getMountManager(),
+					\OC\Files\Filesystem::getLoader(),
+					\OC::$server->getHTTPHelper(),
+					\OC::$server->getNotificationManager(),
+					$discoveryManager,
+					$shareWith
+				);
+
+			try {
+				$externalManager->addShare($remote, $token, '', $name, $owner, false, $shareWith, $remoteId);
+				$shareId = \OC::$server->getDatabaseConnection()->lastInsertId('*PREFIX*share_external');
+
+				$user = $owner . '@' . $this->cleanupRemote($remote);
+
+				\OC::$server->getActivityManager()->publishActivity(
+					Activity::FILES_SHARING_APP, Activity::SUBJECT_REMOTE_SHARE_RECEIVED, array($user, trim($name, '/')), '', array(),
+					'', '', $shareWith, Activity::TYPE_REMOTE_SHARE, Activity::PRIORITY_LOW);
+
+				$urlGenerator = \OC::$server->getURLGenerator();
+
+				$notificationManager = \OC::$server->getNotificationManager();
+				$notification = $notificationManager->createNotification();
+				$notification->setApp('files_sharing')
+					->setUser($shareWith)
+					->setDateTime(new \DateTime())
+					->setObject('remote_share', $shareId)
+					->setSubject('remote_share', [$user, trim($name, '/')]);
+
+				$declineAction = $notification->createAction();
+				$declineAction->setLabel('decline')
+					->setLink($urlGenerator->getAbsoluteURL($urlGenerator->linkTo('', 'ocs/v1.php/apps/files_sharing/api/v1/remote_shares/pending/' . $shareId)), 'DELETE');
+				$notification->addAction($declineAction);
+
+				$acceptAction = $notification->createAction();
+				$acceptAction->setLabel('accept')
+					->setLink($urlGenerator->getAbsoluteURL($urlGenerator->linkTo('', 'ocs/v1.php/apps/files_sharing/api/v1/remote_shares/pending/' . $shareId)), 'POST');
+				$notification->addAction($acceptAction);
+
+				$notificationManager->notify($notification);
+
+				return new \OC_OCS_Result();
+			} catch (\Exception $e) {
+				\OCP\Util::writeLog('files_sharing', 'server can not add remote share, ' . $e->getMessage(), \OCP\Util::ERROR);
+				return new \OC_OCS_Result(null, 500, 'internal server error, was not able to add share from ' . $remote);
+			}
+		}
+
+		return new \OC_OCS_Result(null, 400, 'server can not add remote share, missing parameter');
+	}
+
+	/**
+	 * accept server-to-server share
+	 *
+	 * @param array $params
+	 * @return \OC_OCS_Result
+	 */
+	public function acceptShare($params) {
+
+		if (!$this->isS2SEnabled()) {
+			return new \OC_OCS_Result(null, 503, 'Server does not support federated cloud sharing');
+		}
+
+		$id = $params['id'];
+		$token = isset($_POST['token']) ? $_POST['token'] : null;
+		$share = self::getShare($id, $token);
+
+		if ($share) {
+			list($file, $link) = self::getFile($share['uid_owner'], $share['file_source']);
+
+			$event = \OC::$server->getActivityManager()->generateEvent();
+			$event->setApp(Activity::FILES_SHARING_APP)
+				->setType(Activity::TYPE_REMOTE_SHARE)
+				->setAffectedUser($share['uid_owner'])
+				->setSubject(Activity::SUBJECT_REMOTE_SHARE_ACCEPTED, [$share['share_with'], basename($file)])
+				->setObject('files', $share['file_source'], $file)
+				->setLink($link);
+			\OC::$server->getActivityManager()->publish($event);
+		}
+
+		return new \OC_OCS_Result();
+	}
+
+	/**
+	 * decline server-to-server share
+	 *
+	 * @param array $params
+	 * @return \OC_OCS_Result
+	 */
+	public function declineShare($params) {
+
+		if (!$this->isS2SEnabled()) {
+			return new \OC_OCS_Result(null, 503, 'Server does not support federated cloud sharing');
+		}
+
+		$id = $params['id'];
+		$token = isset($_POST['token']) ? $_POST['token'] : null;
+
+		$share = $this->getShare($id, $token);
+
+		if ($share) {
+			// userId must be set to the user who unshares
+			\OCP\Share::unshare($share['item_type'], $share['item_source'], $share['share_type'], $share['share_with'], $share['uid_owner']);
+
+			list($file, $link) = $this->getFile($share['uid_owner'], $share['file_source']);
+
+			$event = \OC::$server->getActivityManager()->generateEvent();
+			$event->setApp(Activity::FILES_SHARING_APP)
+				->setType(Activity::TYPE_REMOTE_SHARE)
+				->setAffectedUser($share['uid_owner'])
+				->setSubject(Activity::SUBJECT_REMOTE_SHARE_DECLINED, [$share['share_with'], basename($file)])
+				->setObject('files', $share['file_source'], $file)
+				->setLink($link);
+			\OC::$server->getActivityManager()->publish($event);
+		}
+
+		return new \OC_OCS_Result();
+	}
+
+	/**
+	 * remove server-to-server share if it was unshared by the owner
+	 *
+	 * @param array $params
+	 * @return \OC_OCS_Result
+	 */
+	public function unshare($params) {
+
+		if (!$this->isS2SEnabled()) {
+			return new \OC_OCS_Result(null, 503, 'Server does not support federated cloud sharing');
+		}
+
+		$id = $params['id'];
+		$token = isset($_POST['token']) ? $_POST['token'] : null;
+
+		$query = \OCP\DB::prepare('SELECT * FROM `*PREFIX*share_external` WHERE `remote_id` = ? AND `share_token` = ?');
+		$query->execute(array($id, $token));
+		$share = $query->fetchRow();
+
+		if ($token && $id && !empty($share)) {
+
+			$remote = $this->cleanupRemote($share['remote']);
+
+			$owner = $share['owner'] . '@' . $remote;
+			$mountpoint = $share['mountpoint'];
+			$user = $share['user'];
+
+			$query = \OCP\DB::prepare('DELETE FROM `*PREFIX*share_external` WHERE `remote_id` = ? AND `share_token` = ?');
+			$query->execute(array($id, $token));
+
+			if ($share['accepted']) {
+				$path = trim($mountpoint, '/');
+			} else {
+				$path = trim($share['name'], '/');
+			}
+
+			$notificationManager = \OC::$server->getNotificationManager();
+			$notification = $notificationManager->createNotification();
+			$notification->setApp('files_sharing')
+				->setUser($share['user'])
+				->setObject('remote_share', (int) $share['id']);
+			$notificationManager->markProcessed($notification);
+
+			\OC::$server->getActivityManager()->publishActivity(
+				Activity::FILES_SHARING_APP, Activity::SUBJECT_REMOTE_SHARE_UNSHARED, array($owner, $path), '', array(),
+				'', '', $user, Activity::TYPE_REMOTE_SHARE, Activity::PRIORITY_MEDIUM);
+		}
+
+		return new \OC_OCS_Result();
+	}
+
+	private function cleanupRemote($remote) {
+		$remote = substr($remote, strpos($remote, '://') + 3);
+
+		return rtrim($remote, '/');
+	}
+
+	/**
+	 * get share
+	 *
+	 * @param int $id
+	 * @param string $token
+	 * @return array
+	 */
+	private function getShare($id, $token) {
+		$query = \OCP\DB::prepare('SELECT * FROM `*PREFIX*share` WHERE `id` = ? AND `token` = ? AND `share_type` = ?');
+		$query->execute(array($id, $token, \OCP\Share::SHARE_TYPE_REMOTE));
+		$share = $query->fetchRow();
+
+		return $share;
+	}
+
+	/**
+	 * get file
+	 *
+	 * @param string $user
+	 * @param int $fileSource
+	 * @return array with internal path of the file and a absolute link to it
+	 */
+	private function getFile($user, $fileSource) {
+		\OC_Util::setupFS($user);
+
+		try {
+			$file = \OC\Files\Filesystem::getPath($fileSource);
+		} catch (NotFoundException $e) {
+			$file = null;
+		}
+		$args = \OC\Files\Filesystem::is_dir($file) ? array('dir' => $file) : array('dir' => dirname($file), 'scrollto' => $file);
+		$link = \OCP\Util::linkToAbsolute('files', 'index.php', $args);
+
+		return array($file, $link);
+
+	}
+
+	/**
+	 * check if server-to-server sharing is enabled
+	 *
+	 * @param bool $incoming
+	 * @return bool
+	 */
+	private function isS2SEnabled($incoming = false) {
+
+		$result = \OCP\App::isEnabled('files_sharing');
+
+		if ($incoming) {
+			$result = $result && $this->federatedShareProvider->isIncomingServer2serverShareEnabled();
+		} else {
+			$result = $result && $this->federatedShareProvider->isOutgoingServer2serverShareEnabled();
+		}
+
+		return $result;
+	}
+
+}