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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @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\DAV\DAV\Sharing;
use OCA\DAV\Connector\Sabre\Auth;
use OCA\DAV\DAV\Sharing\Xml\Invite;
use OCA\DAV\DAV\Sharing\Xml\ShareRequest;
use OCP\IRequest;
use Sabre\DAV\Exception\NotFound;
use Sabre\DAV\INode;
use Sabre\DAV\PropFind;
use Sabre\DAV\Server;
use Sabre\DAV\ServerPlugin;
use Sabre\HTTP\RequestInterface;
use Sabre\HTTP\ResponseInterface;
class Plugin extends ServerPlugin {
public const NS_OWNCLOUD = 'http://owncloud.org/ns';
public const NS_NEXTCLOUD = 'http://nextcloud.com/ns';
/** @var Auth */
private $auth;
/** @var IRequest */
private $request;
/**
* Plugin constructor.
*
* @param Auth $authBackEnd
* @param IRequest $request
*/
public function __construct(Auth $authBackEnd, IRequest $request) {
$this->auth = $authBackEnd;
$this->request = $request;
}
/**
* Reference to SabreDAV server object.
*
* @var \Sabre\DAV\Server
*/
protected $server;
/**
* This method should return a list of server-features.
*
* This is for example 'versioning' and is added to the DAV: header
* in an OPTIONS response.
*
* @return string[]
*/
public function getFeatures() {
return ['oc-resource-sharing'];
}
/**
* Returns a plugin name.
*
* Using this name other plugins will be able to access other plugins
* using Sabre\DAV\Server::getPlugin
*
* @return string
*/
public function getPluginName() {
return 'oc-resource-sharing';
}
/**
* This initializes the plugin.
*
* This function is called by Sabre\DAV\Server, after
* addPlugin is called.
*
* This method should set up the required event subscriptions.
*
* @param Server $server
* @return void
*/
public function initialize(Server $server) {
$this->server = $server;
$this->server->xml->elementMap['{' . Plugin::NS_OWNCLOUD . '}share'] = ShareRequest::class;
$this->server->xml->elementMap['{' . Plugin::NS_OWNCLOUD . '}invite'] = Invite::class;
$this->server->on('method:POST', [$this, 'httpPost']);
$this->server->on('propFind', [$this, 'propFind']);
}
/**
* We intercept this to handle POST requests on a dav resource.
*
* @param RequestInterface $request
* @param ResponseInterface $response
* @return null|false
*/
public function httpPost(RequestInterface $request, ResponseInterface $response) {
$path = $request->getPath();
// Only handling xml
$contentType = $request->getHeader('Content-Type');
if (strpos($contentType, 'application/xml') === false && strpos($contentType, 'text/xml') === false) {
return;
}
// Making sure the node exists
try {
$node = $this->server->tree->getNodeForPath($path);
} catch (NotFound $e) {
return;
}
$requestBody = $request->getBodyAsString();
// If this request handler could not deal with this POST request, it
// will return 'null' and other plugins get a chance to handle the
// request.
//
// However, we already requested the full body. This is a problem,
// because a body can only be read once. This is why we preemptively
// re-populated the request body with the existing data.
$request->setBody($requestBody);
$message = $this->server->xml->parse($requestBody, $request->getUrl(), $documentType);
switch ($documentType) {
// Dealing with the 'share' document, which modified invitees on a
// calendar.
case '{' . self::NS_OWNCLOUD . '}share':
// We can only deal with IShareableCalendar objects
if (!$node instanceof IShareable) {
return;
}
$this->server->transactionType = 'post-oc-resource-share';
// Getting ACL info
$acl = $this->server->getPlugin('acl');
// If there's no ACL support, we allow everything
if ($acl) {
/** @var \Sabre\DAVACL\Plugin $acl */
$acl->checkPrivileges($path, '{DAV:}write');
}
$node->updateShares($message->set, $message->remove);
$response->setStatus(200);
// Adding this because sending a response body may cause issues,
// and I wanted some type of indicator the response was handled.
$response->setHeader('X-Sabre-Status', 'everything-went-well');
// Breaking the event chain
return false;
}
}
/**
* This event is triggered when properties are requested for a certain
* node.
*
* This allows us to inject any properties early.
*
* @param PropFind $propFind
* @param INode $node
* @return void
*/
public function propFind(PropFind $propFind, INode $node) {
if ($node instanceof IShareable) {
$propFind->handle('{' . Plugin::NS_OWNCLOUD . '}invite', function () use ($node) {
return new Invite(
$node->getShares()
);
});
}
}
}
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