1 files changed, 184 insertions, 0 deletions
diff --git a/apps/federatedfilesharing/lib/Notifications.php b/apps/federatedfilesharing/lib/Notifications.php
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+++ b/apps/federatedfilesharing/lib/Notifications.php
@@ -0,0 +1,184 @@
+<?php
+/**
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Lukas Reschke <lukas@owncloud.com>
+ *
+ * @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 OCP\BackgroundJob\IJobList;
+use OCP\Http\Client\IClientService;
+
+class Notifications {
+	const RESPONSE_FORMAT = 'json'; // default response format for ocs calls
+
+	/** @var AddressHandler */
+	private $addressHandler;
+
+	/** @var IClientService */
+	private $httpClientService;
+
+	/** @var DiscoveryManager */
+	private $discoveryManager;
+
+	/** @var IJobList  */
+	private $jobList;
+
+	/**
+	 * @param AddressHandler $addressHandler
+	 * @param IClientService $httpClientService
+	 * @param DiscoveryManager $discoveryManager
+	 * @param IJobList $jobList
+	 */
+	public function __construct(
+		AddressHandler $addressHandler,
+		IClientService $httpClientService,
+		DiscoveryManager $discoveryManager,
+		IJobList $jobList
+	) {
+		$this->addressHandler = $addressHandler;
+		$this->httpClientService = $httpClientService;
+		$this->discoveryManager = $discoveryManager;
+		$this->jobList = $jobList;
+	}
+
+	/**
+	 * send server-to-server share to remote server
+	 *
+	 * @param string $token
+	 * @param string $shareWith
+	 * @param string $name
+	 * @param int $remote_id
+	 * @param string $owner
+	 * @return bool
+	 */
+	public function sendRemoteShare($token, $shareWith, $name, $remote_id, $owner) {
+
+		list($user, $remote) = $this->addressHandler->splitUserRemote($shareWith);
+
+		if ($user && $remote) {
+			$url = $remote;
+			$local = $this->addressHandler->generateRemoteURL();
+
+			$fields = array(
+				'shareWith' => $user,
+				'token' => $token,
+				'name' => $name,
+				'remoteId' => $remote_id,
+				'owner' => $owner,
+				'remote' => $local,
+			);
+
+			$url = $this->addressHandler->removeProtocolFromUrl($url);
+			$result = $this->tryHttpPostToShareEndpoint($url, '', $fields);
+			$status = json_decode($result['result'], true);
+
+			if ($result['success'] && ($status['ocs']['meta']['statuscode'] === 100 || $status['ocs']['meta']['statuscode'] === 200)) {
+				\OC_Hook::emit('OCP\Share', 'federated_share_added', ['server' => $remote]);
+				return true;
+			}
+
+		}
+
+		return false;
+	}
+
+	/**
+	 * send server-to-server unshare to remote server
+	 *
+	 * @param string $remote url
+	 * @param int $id share id
+	 * @param string $token
+	 * @param int $try how often did we already tried to send the un-share request
+	 * @return bool
+	 */
+	public function sendRemoteUnShare($remote, $id, $token, $try = 0) {
+		$url = rtrim($remote, '/');
+		$fields = array('token' => $token, 'format' => 'json');
+		$url = $this->addressHandler->removeProtocolFromUrl($url);
+		$result = $this->tryHttpPostToShareEndpoint($url, '/'.$id.'/unshare', $fields);
+		$status = json_decode($result['result'], true);
+
+		if ($result['success'] && 
+			($status['ocs']['meta']['statuscode'] === 100 || 
+				$status['ocs']['meta']['statuscode'] === 200
+			)
+		) {
+			return true;
+		} elseif ($try === 0) {
+			// only add new job on first try
+			$this->jobList->add('OCA\FederatedFileSharing\BackgroundJob\UnShare',
+				[
+					'remote' => $remote,
+					'id' => $id,
+					'token' => $token,
+					'try' => $try,
+					'lastRun' => $this->getTimestamp()
+				]
+			);
+		}
+
+		return false;
+	}
+
+	/**
+	 * return current timestamp
+	 *
+	 * @return int
+	 */
+	protected function getTimestamp() {
+		return time();
+	}
+
+	/**
+	 * try http post first with https and then with http as a fallback
+	 *
+	 * @param string $remoteDomain
+	 * @param string $urlSuffix
+	 * @param array $fields post parameters
+	 * @return array
+	 */
+	protected function tryHttpPostToShareEndpoint($remoteDomain, $urlSuffix, array $fields) {
+		$client = $this->httpClientService->newClient();
+		$protocol = 'https://';
+		$result = [
+			'success' => false,
+			'result' => '',
+		];
+		$try = 0;
+
+		while ($result['success'] === false && $try < 2) {
+			$endpoint = $this->discoveryManager->getShareEndpoint($protocol . $remoteDomain);
+			try {
+				$response = $client->post($protocol . $remoteDomain . $endpoint . $urlSuffix . '?format=' . self::RESPONSE_FORMAT, [
+					'body' => $fields
+				]);
+				$result['result'] = $response->getBody();
+				$result['success'] = true;
+				break;
+			} catch (\Exception $e) {
+				$try++;
+				$protocol = 'http://';
+			}
+		}
+
+		return $result;
+	}
+}