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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Joas Schilling <coding@schilljs.com>
* @author Maxence Lange <maxence@nextcloud.com>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @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\Connector\Sabre;
use \Sabre\DAV\PropFind;
use OCP\IUserSession;
use OCP\Share\IShare;
/**
* Sabre Plugin to provide share-related properties
*/
class SharesPlugin extends \Sabre\DAV\ServerPlugin {
const NS_OWNCLOUD = 'http://owncloud.org/ns';
const SHARETYPES_PROPERTYNAME = '{http://owncloud.org/ns}share-types';
/**
* Reference to main server object
*
* @var \Sabre\DAV\Server
*/
private $server;
/**
* @var \OCP\Share\IManager
*/
private $shareManager;
/**
* @var \Sabre\DAV\Tree
*/
private $tree;
/**
* @var string
*/
private $userId;
/**
* @var \OCP\Files\Folder
*/
private $userFolder;
/**
* @var IShare[]
*/
private $cachedShareTypes;
private $cachedFolders = [];
/**
* @param \Sabre\DAV\Tree $tree tree
* @param IUserSession $userSession user session
* @param \OCP\Files\Folder $userFolder user home folder
* @param \OCP\Share\IManager $shareManager share manager
*/
public function __construct(
\Sabre\DAV\Tree $tree,
IUserSession $userSession,
\OCP\Files\Folder $userFolder,
\OCP\Share\IManager $shareManager
) {
$this->tree = $tree;
$this->shareManager = $shareManager;
$this->userFolder = $userFolder;
$this->userId = $userSession->getUser()->getUID();
$this->cachedShareTypes = [];
}
/**
* 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 \Sabre\DAV\Server $server
*/
public function initialize(\Sabre\DAV\Server $server) {
$server->xml->namespacesMap[self::NS_OWNCLOUD] = 'oc';
$server->xml->elementMap[self::SHARETYPES_PROPERTYNAME] = 'OCA\\DAV\\Connector\\Sabre\\ShareTypeList';
$server->protectedProperties[] = self::SHARETYPES_PROPERTYNAME;
$this->server = $server;
$this->server->on('propFind', array($this, 'handleGetProperties'));
}
/**
* Return a list of share types for outgoing shares
*
* @param \OCP\Files\Node $node file node
*
* @return int[] array of share types
*/
private function getShareTypes(\OCP\Files\Node $node) {
$shareTypes = [];
$requestedShareTypes = [
\OCP\Share::SHARE_TYPE_USER,
\OCP\Share::SHARE_TYPE_GROUP,
\OCP\Share::SHARE_TYPE_LINK,
\OCP\Share::SHARE_TYPE_REMOTE,
\OCP\Share::SHARE_TYPE_EMAIL,
];
foreach ($requestedShareTypes as $requestedShareType) {
// one of each type is enough to find out about the types
$shares = $this->shareManager->getSharesBy(
$this->userId,
$requestedShareType,
$node,
false,
1
);
if (!empty($shares)) {
$shareTypes[] = $requestedShareType;
}
}
return $shareTypes;
}
private function getSharesTypesInFolder(\OCP\Files\Folder $node) {
$shares = $this->shareManager->getSharesInFolder(
$this->userId,
$node,
true
);
$shareTypesByFileId = [];
foreach($shares as $fileId => $sharesForFile) {
$types = array_map(function(IShare $share) {
return $share->getShareType();
}, $sharesForFile);
$types = array_unique($types);
sort($types);
$shareTypesByFileId[$fileId] = $types;
}
return $shareTypesByFileId;
}
/**
* Adds shares to propfind response
*
* @param PropFind $propFind propfind object
* @param \Sabre\DAV\INode $sabreNode sabre node
*/
public function handleGetProperties(
PropFind $propFind,
\Sabre\DAV\INode $sabreNode
) {
if (!($sabreNode instanceof \OCA\DAV\Connector\Sabre\Node)) {
return;
}
// need prefetch ?
if ($sabreNode instanceof \OCA\DAV\Connector\Sabre\Directory
&& $propFind->getDepth() !== 0
&& !is_null($propFind->getStatus(self::SHARETYPES_PROPERTYNAME))
) {
$folderNode = $this->userFolder->get($sabreNode->getPath());
$childShares = $this->getSharesTypesInFolder($folderNode);
$this->cachedFolders[] = $sabreNode->getPath();
$this->cachedShareTypes[$folderNode->getId()] = $this->getShareTypes($folderNode);
foreach ($childShares as $id => $shares) {
$this->cachedShareTypes[$id] = $shares;
}
}
$propFind->handle(self::SHARETYPES_PROPERTYNAME, function () use ($sabreNode) {
if (isset($this->cachedShareTypes[$sabreNode->getId()])) {
$shareTypes = $this->cachedShareTypes[$sabreNode->getId()];
} else {
list($parentPath,) = \Sabre\Uri\split($sabreNode->getPath());
if ($parentPath === '') {
$parentPath = '/';
}
// if we already cached the folder this file is in we know there are no shares for this file
if (array_search($parentPath, $this->cachedFolders) === false) {
$node = $this->userFolder->get($sabreNode->getPath());
$shareTypes = $this->getShareTypes($node);
} else {
return [];
}
}
return new ShareTypeList($shareTypes);
});
}
}