257 lines
7.3 KiB
PHP
257 lines
7.3 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016 Thomas Citharel <tcit@tcit.fr>
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*
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Georg Ehrke <oc.list@georgehrke.com>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Citharel <nextcloud@tcit.fr>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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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
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* 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OCA\DAV\CalDAV\Publishing;
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use OCA\DAV\CalDAV\Calendar;
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use OCA\DAV\CalDAV\Publishing\Xml\Publisher;
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use OCP\IConfig;
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use OCP\IURLGenerator;
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use Sabre\CalDAV\Xml\Property\AllowedSharingModes;
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use Sabre\DAV\Exception\NotFound;
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use Sabre\DAV\INode;
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use Sabre\DAV\PropFind;
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use Sabre\DAV\Server;
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use Sabre\DAV\ServerPlugin;
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use Sabre\HTTP\RequestInterface;
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use Sabre\HTTP\ResponseInterface;
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class PublishPlugin extends ServerPlugin {
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public const NS_CALENDARSERVER = 'http://calendarserver.org/ns/';
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/**
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* Reference to SabreDAV server object.
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*
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* @var \Sabre\DAV\Server
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*/
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protected $server;
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/**
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* Config instance to get instance secret.
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*
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* @var IConfig
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*/
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protected $config;
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/**
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* URL Generator for absolute URLs.
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*
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* @var IURLGenerator
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*/
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protected $urlGenerator;
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/**
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* PublishPlugin constructor.
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*
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* @param IConfig $config
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* @param IURLGenerator $urlGenerator
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*/
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public function __construct(IConfig $config, IURLGenerator $urlGenerator) {
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$this->config = $config;
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$this->urlGenerator = $urlGenerator;
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}
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/**
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* This method should return a list of server-features.
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*
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* This is for example 'versioning' and is added to the DAV: header
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* in an OPTIONS response.
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*
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* @return string[]
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*/
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public function getFeatures() {
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// May have to be changed to be detected
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return ['oc-calendar-publishing', 'calendarserver-sharing'];
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}
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/**
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* Returns a plugin name.
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*
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* Using this name other plugins will be able to access other plugins
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* using Sabre\DAV\Server::getPlugin
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*
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* @return string
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*/
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public function getPluginName() {
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return 'oc-calendar-publishing';
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}
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/**
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* This initializes the plugin.
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*
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* This function is called by Sabre\DAV\Server, after
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* addPlugin is called.
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*
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* This method should set up the required event subscriptions.
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*
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* @param Server $server
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*/
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public function initialize(Server $server) {
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$this->server = $server;
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$this->server->on('method:POST', [$this, 'httpPost']);
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$this->server->on('propFind', [$this, 'propFind']);
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}
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public function propFind(PropFind $propFind, INode $node) {
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if ($node instanceof Calendar) {
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$propFind->handle('{'.self::NS_CALENDARSERVER.'}publish-url', function () use ($node) {
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if ($node->getPublishStatus()) {
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// We return the publish-url only if the calendar is published.
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$token = $node->getPublishStatus();
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$publishUrl = $this->urlGenerator->getAbsoluteURL($this->server->getBaseUri().'public-calendars/').$token;
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return new Publisher($publishUrl, true);
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}
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});
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$propFind->handle('{'.self::NS_CALENDARSERVER.'}allowed-sharing-modes', function () use ($node) {
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$canShare = (!$node->isSubscription() && $node->canWrite());
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$canPublish = (!$node->isSubscription() && $node->canWrite());
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if ($this->config->getAppValue('dav', 'limitAddressBookAndCalendarSharingToOwner', 'no') === 'yes') {
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$canShare &= ($node->getOwner() === $node->getPrincipalURI());
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$canPublish &= ($node->getOwner() === $node->getPrincipalURI());
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}
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return new AllowedSharingModes($canShare, $canPublish);
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});
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}
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}
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/**
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* We intercept this to handle POST requests on calendars.
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*
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* @param RequestInterface $request
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* @param ResponseInterface $response
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*
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* @return void|bool
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*/
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public function httpPost(RequestInterface $request, ResponseInterface $response) {
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$path = $request->getPath();
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// Only handling xml
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$contentType = $request->getHeader('Content-Type');
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if (strpos($contentType, 'application/xml') === false && strpos($contentType, 'text/xml') === false) {
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return;
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}
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// Making sure the node exists
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try {
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$node = $this->server->tree->getNodeForPath($path);
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} catch (NotFound $e) {
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return;
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}
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$requestBody = $request->getBodyAsString();
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// If this request handler could not deal with this POST request, it
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// will return 'null' and other plugins get a chance to handle the
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// request.
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//
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// However, we already requested the full body. This is a problem,
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// because a body can only be read once. This is why we preemptively
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// re-populated the request body with the existing data.
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$request->setBody($requestBody);
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$this->server->xml->parse($requestBody, $request->getUrl(), $documentType);
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switch ($documentType) {
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case '{'.self::NS_CALENDARSERVER.'}publish-calendar':
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// We can only deal with IShareableCalendar objects
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if (!$node instanceof Calendar) {
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return;
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}
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$this->server->transactionType = 'post-publish-calendar';
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// Getting ACL info
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$acl = $this->server->getPlugin('acl');
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// If there's no ACL support, we allow everything
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if ($acl) {
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/** @var \Sabre\DAVACL\Plugin $acl */
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$acl->checkPrivileges($path, '{DAV:}write');
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$limitSharingToOwner = $this->config->getAppValue('dav', 'limitAddressBookAndCalendarSharingToOwner', 'no') === 'yes';
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$isOwner = $acl->getCurrentUserPrincipal() === $node->getOwner();
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if ($limitSharingToOwner && !$isOwner) {
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return;
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}
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}
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$node->setPublishStatus(true);
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// iCloud sends back the 202, so we will too.
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$response->setStatus(202);
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// Adding this because sending a response body may cause issues,
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// and I wanted some type of indicator the response was handled.
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$response->setHeader('X-Sabre-Status', 'everything-went-well');
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// Breaking the event chain
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return false;
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case '{'.self::NS_CALENDARSERVER.'}unpublish-calendar':
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// We can only deal with IShareableCalendar objects
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if (!$node instanceof Calendar) {
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return;
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}
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$this->server->transactionType = 'post-unpublish-calendar';
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// Getting ACL info
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$acl = $this->server->getPlugin('acl');
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// If there's no ACL support, we allow everything
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if ($acl) {
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/** @var \Sabre\DAVACL\Plugin $acl */
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$acl->checkPrivileges($path, '{DAV:}write');
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$limitSharingToOwner = $this->config->getAppValue('dav', 'limitAddressBookAndCalendarSharingToOwner', 'no') === 'yes';
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$isOwner = $acl->getCurrentUserPrincipal() === $node->getOwner();
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if ($limitSharingToOwner && !$isOwner) {
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return;
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}
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}
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$node->setPublishStatus(false);
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$response->setStatus(200);
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// Adding this because sending a response body may cause issues,
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// and I wanted some type of indicator the response was handled.
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$response->setHeader('X-Sabre-Status', 'everything-went-well');
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// Breaking the event chain
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return false;
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}
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}
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}
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