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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Robin Appelman <robin@icewind.nl>
*
* @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 OCP\Comments\ICommentsManager;
use OCP\IUserSession;
use Sabre\DAV\PropFind;
use Sabre\DAV\ServerPlugin;
class CommentPropertiesPlugin extends ServerPlugin {
const PROPERTY_NAME_HREF = '{http://owncloud.org/ns}comments-href';
const PROPERTY_NAME_COUNT = '{http://owncloud.org/ns}comments-count';
const PROPERTY_NAME_UNREAD = '{http://owncloud.org/ns}comments-unread';
/** @var \Sabre\DAV\Server */
protected $server;
/** @var ICommentsManager */
private $commentsManager;
/** @var IUserSession */
private $userSession;
private $cachedUnreadCount = [];
private $cachedFolders = [];
public function __construct(ICommentsManager $commentsManager, IUserSession $userSession) {
$this->commentsManager = $commentsManager;
$this->userSession = $userSession;
}
/**
* 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
* @return void
*/
function initialize(\Sabre\DAV\Server $server) {
$this->server = $server;
$this->server->on('propFind', array($this, 'handleGetProperties'));
}
/**
* Adds tags and favorites properties to the response,
* if requested.
*
* @param PropFind $propFind
* @param \Sabre\DAV\INode $node
* @return void
*/
public function handleGetProperties(
PropFind $propFind,
\Sabre\DAV\INode $node
) {
if (!($node instanceof File) && !($node instanceof Directory)) {
return;
}
// need prefetch ?
if ($node instanceof \OCA\DAV\Connector\Sabre\Directory
&& $propFind->getDepth() !== 0
&& !is_null($propFind->getStatus(self::PROPERTY_NAME_UNREAD))
) {
$unreadCounts = $this->commentsManager->getNumberOfUnreadCommentsForFolder($node->getId(), $this->userSession->getUser());
$this->cachedFolders[] = $node->getPath();
foreach ($unreadCounts as $id => $count) {
$this->cachedUnreadCount[$id] = $count;
}
}
$propFind->handle(self::PROPERTY_NAME_COUNT, function() use ($node) {
return $this->commentsManager->getNumberOfCommentsForObject('files', strval($node->getId()));
});
$propFind->handle(self::PROPERTY_NAME_HREF, function() use ($node) {
return $this->getCommentsLink($node);
});
$propFind->handle(self::PROPERTY_NAME_UNREAD, function() use ($node) {
if (isset($this->cachedUnreadCount[$node->getId()])) {
return $this->cachedUnreadCount[$node->getId()];
} else {
list($parentPath,) = \Sabre\Uri\split($node->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) {
return $this->getUnreadCount($node);
} else {
return 0;
}
}
});
}
/**
* returns a reference to the comments node
*
* @param Node $node
* @return mixed|string
*/
public function getCommentsLink(Node $node) {
$href = $this->server->getBaseUri();
$entryPoint = strpos($href, '/remote.php/');
if($entryPoint === false) {
// in case we end up somewhere else, unexpectedly.
return null;
}
$commentsPart = 'dav/comments/files/' . rawurldecode($node->getId());
$href = substr_replace($href, $commentsPart, $entryPoint + strlen('/remote.php/'));
return $href;
}
/**
* returns the number of unread comments for the currently logged in user
* on the given file or directory node
*
* @param Node $node
* @return Int|null
*/
public function getUnreadCount(Node $node) {
$user = $this->userSession->getUser();
if(is_null($user)) {
return null;
}
$lastRead = $this->commentsManager->getReadMark('files', strval($node->getId()), $user);
return $this->commentsManager->getNumberOfCommentsForObject('files', strval($node->getId()), $lastRead);
}
}