nextcloud/apps/files_sharing/api/server2server.php

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<?php
/**
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* @author Arthur Schiwon <blizzz@owncloud.com>
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* @author Björn Schießle <schiessle@owncloud.com>
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* @author Joas Schilling <nickvergessen@owncloud.com>
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* @author Lukas Reschke <lukas@owncloud.com>
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* @author Morris Jobke <hey@morrisjobke.de>
*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* 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.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
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*
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* 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/>
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*
*/
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namespace OCA\Files_Sharing\API;
use OCA\FederatedFileSharing\DiscoveryManager;
use OCA\Files_Sharing\Activity;
use OCP\Files\NotFoundException;
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class Server2Server {
/**
* 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');
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}
$remote = isset($_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)$_POST['remoteId'] : null;
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if ($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, ' . $shareWith, \OCP\Util::DEBUG);
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if (!\OCP\User::userExists($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
);
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try {
$externalManager->addShare($remote, $token, '', $name, $owner, false, $shareWith, $remoteId);
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$shareId = \OC::$server->getDatabaseConnection()->lastInsertId('*PREFIX*share_external');
$user = $owner . '@' . $this->cleanupRemote($remote);
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\OC::$server->getActivityManager()->publishActivity(
Activity::FILES_SHARING_APP, Activity::SUBJECT_REMOTE_SHARE_RECEIVED, array($user, trim($name, '/')), '', array(),
'', '', $shareWith, Activity::TYPE_REMOTE_SHARE, Activity::PRIORITY_LOW);
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$urlGenerator = \OC::$server->getURLGenerator();
$notificationManager = \OC::$server->getNotificationManager();
$notification = $notificationManager->createNotification();
$notification->setApp('files_sharing')
->setUser($shareWith)
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->setDateTime(new \DateTime())
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->setObject('remote_share', $shareId)
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->setSubject('remote_share', [$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/' . $shareId)), 'DELETE');
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$notification->addAction($declineAction);
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$acceptAction = $notification->createAction();
$acceptAction->setLabel('accept')
->setLink($urlGenerator->getAbsoluteURL($urlGenerator->linkTo('', 'ocs/v1.php/apps/files_sharing/api/v1/remote_shares/pending/' . $shareId)), 'POST');
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$notification->addAction($acceptAction);
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$notificationManager->notify($notification);
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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);
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}
}
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');
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}
$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);
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}
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');
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}
$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'], $share['uid_owner']);
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list($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);
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}
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');
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}
$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'] . '@' . $remote;
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$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);
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\OC::$server->getActivityManager()->publishActivity(
Activity::FILES_SHARING_APP, Activity::SUBJECT_REMOTE_SHARE_UNSHARED, array($owner, $path), '', array(),
'', '', $user, Activity::TYPE_REMOTE_SHARE, Activity::PRIORITY_MEDIUM);
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}
return new \OC_OCS_Result();
}
private function cleanupRemote($remote) {
$remote = substr($remote, strpos($remote, '://') + 3);
return rtrim($remote, '/');
}
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/**
* 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) {
$file = null;
}
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$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 && \OCA\Files_Sharing\Helper::isIncomingServer2serverShareEnabled();
} else {
$result = $result && \OCA\Files_Sharing\Helper::isOutgoingServer2serverShareEnabled();
}
return $result;
}
}