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diff --git a/calendar/lib/SabreDAV/lib/OldSabre/CalDAV/Plugin.php b/calendar/lib/SabreDAV/lib/OldSabre/CalDAV/Plugin.php
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+++ b/calendar/lib/SabreDAV/lib/OldSabre/CalDAV/Plugin.php
@@ -0,0 +1,1338 @@
+<?php
+
+namespace OldSabre\CalDAV;
+
+use OldSabre\DAV;
+use OldSabre\DAVACL;
+use OldSabre\VObject;
+
+/**
+ * CalDAV plugin
+ *
+ * This plugin provides functionality added by CalDAV (RFC 4791)
+ * It implements new reports, and the MKCALENDAR method.
+ *
+ * @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Plugin extends DAV\ServerPlugin {
+
+ /**
+ * This is the official CalDAV namespace
+ */
+ const NS_CALDAV = 'urn:ietf:params:xml:ns:caldav';
+
+ /**
+ * This is the namespace for the proprietary calendarserver extensions
+ */
+ const NS_CALENDARSERVER = 'http://calendarserver.org/ns/';
+
+ /**
+ * The hardcoded root for calendar objects. It is unfortunate
+ * that we're stuck with it, but it will have to do for now
+ */
+ const CALENDAR_ROOT = 'calendars';
+
+ /**
+ * Reference to server object
+ *
+ * @var DAV\Server
+ */
+ protected $server;
+
+ /**
+ * The email handler for invites and other scheduling messages.
+ *
+ * @var Schedule\IMip
+ */
+ protected $imipHandler;
+
+ /**
+ * Sets the iMIP handler.
+ *
+ * iMIP = The email transport of iCalendar scheduling messages. Setting
+ * this is optional, but if you want the server to allow invites to be sent
+ * out, you must set a handler.
+ *
+ * Specifically iCal will plain assume that the server supports this. If
+ * the server doesn't, iCal will display errors when inviting people to
+ * events.
+ *
+ * @param Schedule\IMip $imipHandler
+ * @return void
+ */
+ public function setIMipHandler(Schedule\IMip $imipHandler) {
+
+ $this->imipHandler = $imipHandler;
+
+ }
+
+ /**
+ * Use this method to tell the server this plugin defines additional
+ * HTTP methods.
+ *
+ * This method is passed a uri. It should only return HTTP methods that are
+ * available for the specified uri.
+ *
+ * @param string $uri
+ * @return array
+ */
+ public function getHTTPMethods($uri) {
+
+ // The MKCALENDAR is only available on unmapped uri's, whose
+ // parents extend IExtendedCollection
+ list($parent, $name) = DAV\URLUtil::splitPath($uri);
+
+ $node = $this->server->tree->getNodeForPath($parent);
+
+ if ($node instanceof DAV\IExtendedCollection) {
+ try {
+ $node->getChild($name);
+ } catch (DAV\Exception\NotFound $e) {
+ return array('MKCALENDAR');
+ }
+ }
+ return array();
+
+ }
+
+ /**
+ * Returns a list of features for the DAV: HTTP header.
+ *
+ * @return array
+ */
+ public function getFeatures() {
+
+ return array('calendar-access', 'calendar-proxy');
+
+ }
+
+ /**
+ * Returns a plugin name.
+ *
+ * Using this name other plugins will be able to access other plugins
+ * using DAV\Server::getPlugin
+ *
+ * @return string
+ */
+ public function getPluginName() {
+
+ return 'caldav';
+
+ }
+
+ /**
+ * Returns a list of reports this plugin supports.
+ *
+ * This will be used in the {DAV:}supported-report-set property.
+ * Note that you still need to subscribe to the 'report' event to actually
+ * implement them
+ *
+ * @param string $uri
+ * @return array
+ */
+ public function getSupportedReportSet($uri) {
+
+ $node = $this->server->tree->getNodeForPath($uri);
+
+ $reports = array();
+ if ($node instanceof ICalendar || $node instanceof ICalendarObject) {
+ $reports[] = '{' . self::NS_CALDAV . '}calendar-multiget';
+ $reports[] = '{' . self::NS_CALDAV . '}calendar-query';
+ }
+ if ($node instanceof ICalendar) {
+ $reports[] = '{' . self::NS_CALDAV . '}free-busy-query';
+ }
+ return $reports;
+
+ }
+
+ /**
+ * Initializes the plugin
+ *
+ * @param DAV\Server $server
+ * @return void
+ */
+ public function initialize(DAV\Server $server) {
+
+ $this->server = $server;
+
+ $server->subscribeEvent('unknownMethod',array($this,'unknownMethod'));
+ //$server->subscribeEvent('unknownMethod',array($this,'unknownMethod2'),1000);
+ $server->subscribeEvent('report',array($this,'report'));
+ $server->subscribeEvent('beforeGetProperties',array($this,'beforeGetProperties'));
+ $server->subscribeEvent('onHTMLActionsPanel', array($this,'htmlActionsPanel'));
+ $server->subscribeEvent('onBrowserPostAction', array($this,'browserPostAction'));
+ $server->subscribeEvent('beforeWriteContent', array($this, 'beforeWriteContent'));
+ $server->subscribeEvent('beforeCreateFile', array($this, 'beforeCreateFile'));
+ $server->subscribeEvent('beforeMethod', array($this,'beforeMethod'));
+
+ $server->xmlNamespaces[self::NS_CALDAV] = 'cal';
+ $server->xmlNamespaces[self::NS_CALENDARSERVER] = 'cs';
+
+ $server->propertyMap['{' . self::NS_CALDAV . '}supported-calendar-component-set'] = 'OldSabre\\CalDAV\\Property\\SupportedCalendarComponentSet';
+ $server->propertyMap['{' . self::NS_CALDAV . '}schedule-calendar-transp'] = 'OldSabre\\CalDAV\\Property\\ScheduleCalendarTransp';
+
+ $server->resourceTypeMapping['\\OldSabre\\CalDAV\\ICalendar'] = '{urn:ietf:params:xml:ns:caldav}calendar';
+ $server->resourceTypeMapping['\\OldSabre\\CalDAV\\Schedule\\IOutbox'] = '{urn:ietf:params:xml:ns:caldav}schedule-outbox';
+ $server->resourceTypeMapping['\\OldSabre\\CalDAV\\Principal\\IProxyRead'] = '{http://calendarserver.org/ns/}calendar-proxy-read';
+ $server->resourceTypeMapping['\\OldSabre\\CalDAV\\Principal\\IProxyWrite'] = '{http://calendarserver.org/ns/}calendar-proxy-write';
+ $server->resourceTypeMapping['\\OldSabre\\CalDAV\\Notifications\\ICollection'] = '{' . self::NS_CALENDARSERVER . '}notification';
+
+ array_push($server->protectedProperties,
+
+ '{' . self::NS_CALDAV . '}supported-calendar-component-set',
+ '{' . self::NS_CALDAV . '}supported-calendar-data',
+ '{' . self::NS_CALDAV . '}max-resource-size',
+ '{' . self::NS_CALDAV . '}min-date-time',
+ '{' . self::NS_CALDAV . '}max-date-time',
+ '{' . self::NS_CALDAV . '}max-instances',
+ '{' . self::NS_CALDAV . '}max-attendees-per-instance',
+ '{' . self::NS_CALDAV . '}calendar-home-set',
+ '{' . self::NS_CALDAV . '}supported-collation-set',
+ '{' . self::NS_CALDAV . '}calendar-data',
+
+ // scheduling extension
+ '{' . self::NS_CALDAV . '}schedule-inbox-URL',
+ '{' . self::NS_CALDAV . '}schedule-outbox-URL',
+ '{' . self::NS_CALDAV . '}calendar-user-address-set',
+ '{' . self::NS_CALDAV . '}calendar-user-type',
+
+ // CalendarServer extensions
+ '{' . self::NS_CALENDARSERVER . '}getctag',
+ '{' . self::NS_CALENDARSERVER . '}calendar-proxy-read-for',
+ '{' . self::NS_CALENDARSERVER . '}calendar-proxy-write-for',
+ '{' . self::NS_CALENDARSERVER . '}notification-URL',
+ '{' . self::NS_CALENDARSERVER . '}notificationtype'
+
+ );
+ }
+
+ /**
+ * This function handles support for the MKCALENDAR method
+ *
+ * @param string $method
+ * @param string $uri
+ * @return bool
+ */
+ public function unknownMethod($method, $uri) {
+
+ switch ($method) {
+ case 'MKCALENDAR' :
+ $this->httpMkCalendar($uri);
+ // false is returned to stop the propagation of the
+ // unknownMethod event.
+ return false;
+ case 'POST' :
+
+ // Checking if this is a text/calendar content type
+ $contentType = $this->server->httpRequest->getHeader('Content-Type');
+ if (strpos($contentType, 'text/calendar')!==0) {
+ return;
+ }
+
+ // Checking if we're talking to an outbox
+ try {
+ $node = $this->server->tree->getNodeForPath($uri);
+ } catch (DAV\Exception\NotFound $e) {
+ return;
+ }
+ if (!$node instanceof Schedule\IOutbox)
+ return;
+
+ $this->outboxRequest($node, $uri);
+ return false;
+
+ }
+
+ }
+
+ /**
+ * This functions handles REPORT requests specific to CalDAV
+ *
+ * @param string $reportName
+ * @param \DOMNode $dom
+ * @return bool
+ */
+ public function report($reportName,$dom) {
+
+ switch($reportName) {
+ case '{'.self::NS_CALDAV.'}calendar-multiget' :
+ $this->calendarMultiGetReport($dom);
+ return false;
+ case '{'.self::NS_CALDAV.'}calendar-query' :
+ $this->calendarQueryReport($dom);
+ return false;
+ case '{'.self::NS_CALDAV.'}free-busy-query' :
+ $this->freeBusyQueryReport($dom);
+ return false;
+
+ }
+
+
+ }
+
+ /**
+ * This function handles the MKCALENDAR HTTP method, which creates
+ * a new calendar.
+ *
+ * @param string $uri
+ * @return void
+ */
+ public function httpMkCalendar($uri) {
+
+ // Due to unforgivable bugs in iCal, we're completely disabling MKCALENDAR support
+ // for clients matching iCal in the user agent
+ //$ua = $this->server->httpRequest->getHeader('User-Agent');
+ //if (strpos($ua,'iCal/')!==false) {
+ // throw new \OldSabre\DAV\Exception\Forbidden('iCal has major bugs in it\'s RFC3744 support. Therefore we are left with no other choice but disabling this feature.');
+ //}
+
+ $body = $this->server->httpRequest->getBody(true);
+ $properties = array();
+
+ if ($body) {
+
+ $dom = DAV\XMLUtil::loadDOMDocument($body);
+
+ foreach($dom->firstChild->childNodes as $child) {
+
+ if (DAV\XMLUtil::toClarkNotation($child)!=='{DAV:}set') continue;
+ foreach(DAV\XMLUtil::parseProperties($child,$this->server->propertyMap) as $k=>$prop) {
+ $properties[$k] = $prop;
+ }
+
+ }
+ }
+
+ $resourceType = array('{DAV:}collection','{urn:ietf:params:xml:ns:caldav}calendar');
+
+ $this->server->createCollection($uri,$resourceType,$properties);
+
+ $this->server->httpResponse->sendStatus(201);
+ $this->server->httpResponse->setHeader('Content-Length',0);
+ }
+
+ /**
+ * beforeGetProperties
+ *
+ * This method handler is invoked before any after properties for a
+ * resource are fetched. This allows us to add in any CalDAV specific
+ * properties.
+ *
+ * @param string $path
+ * @param DAV\INode $node
+ * @param array $requestedProperties
+ * @param array $returnedProperties
+ * @return void
+ */
+ public function beforeGetProperties($path, DAV\INode $node, &$requestedProperties, &$returnedProperties) {
+
+ if ($node instanceof DAVACL\IPrincipal) {
+
+ // calendar-home-set property
+ $calHome = '{' . self::NS_CALDAV . '}calendar-home-set';
+ if (in_array($calHome,$requestedProperties)) {
+ $principalId = $node->getName();
+ $calendarHomePath = self::CALENDAR_ROOT . '/' . $principalId . '/';
+
+ unset($requestedProperties[array_search($calHome, $requestedProperties)]);
+ $returnedProperties[200][$calHome] = new DAV\Property\Href($calendarHomePath);
+
+ }
+
+ // schedule-outbox-URL property
+ $scheduleProp = '{' . self::NS_CALDAV . '}schedule-outbox-URL';
+ if (in_array($scheduleProp,$requestedProperties)) {
+ $principalId = $node->getName();
+ $outboxPath = self::CALENDAR_ROOT . '/' . $principalId . '/outbox';
+
+ unset($requestedProperties[array_search($scheduleProp, $requestedProperties)]);
+ $returnedProperties[200][$scheduleProp] = new DAV\Property\Href($outboxPath);
+
+ }
+
+ // calendar-user-address-set property
+ $calProp = '{' . self::NS_CALDAV . '}calendar-user-address-set';
+ if (in_array($calProp,$requestedProperties)) {
+
+ $addresses = $node->getAlternateUriSet();
+ $addresses[] = $this->server->getBaseUri() . DAV\URLUtil::encodePath($node->getPrincipalUrl() . '/');
+ unset($requestedProperties[array_search($calProp, $requestedProperties)]);
+ $returnedProperties[200][$calProp] = new DAV\Property\HrefList($addresses, false);
+
+ }
+
+ // These two properties are shortcuts for ical to easily find
+ // other principals this principal has access to.
+ $propRead = '{' . self::NS_CALENDARSERVER . '}calendar-proxy-read-for';
+ $propWrite = '{' . self::NS_CALENDARSERVER . '}calendar-proxy-write-for';
+ if (in_array($propRead,$requestedProperties) || in_array($propWrite,$requestedProperties)) {
+
+ $aclPlugin = $this->server->getPlugin('acl');
+ $membership = $aclPlugin->getPrincipalMembership($path);
+ $readList = array();
+ $writeList = array();
+
+ foreach($membership as $group) {
+
+ $groupNode = $this->server->tree->getNodeForPath($group);
+
+ // If the node is either ap proxy-read or proxy-write
+ // group, we grab the parent principal and add it to the
+ // list.
+ if ($groupNode instanceof Principal\IProxyRead) {
+ list($readList[]) = DAV\URLUtil::splitPath($group);
+ }
+ if ($groupNode instanceof Principal\IProxyWrite) {
+ list($writeList[]) = DAV\URLUtil::splitPath($group);
+ }
+
+ }
+ if (in_array($propRead,$requestedProperties)) {
+ unset($requestedProperties[$propRead]);
+ $returnedProperties[200][$propRead] = new DAV\Property\HrefList($readList);
+ }
+ if (in_array($propWrite,$requestedProperties)) {
+ unset($requestedProperties[$propWrite]);
+ $returnedProperties[200][$propWrite] = new DAV\Property\HrefList($writeList);
+ }
+
+ }
+
+ // notification-URL property
+ $notificationUrl = '{' . self::NS_CALENDARSERVER . '}notification-URL';
+ if (($index = array_search($notificationUrl, $requestedProperties)) !== false) {
+ $principalId = $node->getName();
+ $calendarHomePath = 'calendars/' . $principalId . '/notifications/';
+ unset($requestedProperties[$index]);
+ $returnedProperties[200][$notificationUrl] = new DAV\Property\Href($calendarHomePath);
+ }
+
+ } // instanceof IPrincipal
+
+ if ($node instanceof Notifications\INode) {
+
+ $propertyName = '{' . self::NS_CALENDARSERVER . '}notificationtype';
+ if (($index = array_search($propertyName, $requestedProperties)) !== false) {
+
+ $returnedProperties[200][$propertyName] =
+ $node->getNotificationType();
+
+ unset($requestedProperties[$index]);
+
+ }
+
+ } // instanceof Notifications_INode
+
+
+ if ($node instanceof ICalendarObject) {
+ // The calendar-data property is not supposed to be a 'real'
+ // property, but in large chunks of the spec it does act as such.
+ // Therefore we simply expose it as a property.
+ $calDataProp = '{' . Plugin::NS_CALDAV . '}calendar-data';
+ if (in_array($calDataProp, $requestedProperties)) {
+ unset($requestedProperties[$calDataProp]);
+ $val = $node->get();
+ if (is_resource($val))
+ $val = stream_get_contents($val);
+
+ // Taking out \r to not screw up the xml output
+ $returnedProperties[200][$calDataProp] = str_replace("\r","", $val);
+
+ }
+ }
+
+ }
+
+ /**
+ * This function handles the calendar-multiget REPORT.
+ *
+ * This report is used by the client to fetch the content of a series
+ * of urls. Effectively avoiding a lot of redundant requests.
+ *
+ * @param \DOMNode $dom
+ * @return void
+ */
+ public function calendarMultiGetReport($dom) {
+
+ $properties = array_keys(DAV\XMLUtil::parseProperties($dom->firstChild));
+ $hrefElems = $dom->getElementsByTagNameNS('urn:DAV','href');
+
+ $xpath = new \DOMXPath($dom);
+ $xpath->registerNameSpace('cal',Plugin::NS_CALDAV);
+ $xpath->registerNameSpace('dav','urn:DAV');
+
+ $expand = $xpath->query('/cal:calendar-multiget/dav:prop/cal:calendar-data/cal:expand');
+ if ($expand->length>0) {
+ $expandElem = $expand->item(0);
+ $start = $expandElem->getAttribute('start');
+ $end = $expandElem->getAttribute('end');
+ if(!$start || !$end) {
+ throw new DAV\Exception\BadRequest('The "start" and "end" attributes are required for the CALDAV:expand element');
+ }
+ $start = VObject\DateTimeParser::parseDateTime($start);
+ $end = VObject\DateTimeParser::parseDateTime($end);
+
+ if ($end <= $start) {
+ throw new DAV\Exception\BadRequest('The end-date must be larger than the start-date in the expand element.');
+ }
+
+ $expand = true;
+
+ } else {
+
+ $expand = false;
+
+ }
+
+ foreach($hrefElems as $elem) {
+ $uri = $this->server->calculateUri($elem->nodeValue);
+ list($objProps) = $this->server->getPropertiesForPath($uri,$properties);
+
+ if ($expand && isset($objProps[200]['{' . self::NS_CALDAV . '}calendar-data'])) {
+ $vObject = VObject\Reader::read($objProps[200]['{' . self::NS_CALDAV . '}calendar-data']);
+ $vObject->expand($start, $end);
+ $objProps[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
+ }
+
+ $propertyList[]=$objProps;
+
+ }
+
+ $prefer = $this->server->getHTTPPRefer();
+
+ $this->server->httpResponse->sendStatus(207);
+ $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
+ $this->server->httpResponse->setHeader('Vary','Brief,Prefer');
+ $this->server->httpResponse->sendBody($this->server->generateMultiStatus($propertyList, $prefer['return-minimal']));
+
+ }
+
+ /**
+ * This function handles the calendar-query REPORT
+ *
+ * This report is used by clients to request calendar objects based on
+ * complex conditions.
+ *
+ * @param \DOMNode $dom
+ * @return void
+ */
+ public function calendarQueryReport($dom) {
+
+ $parser = new CalendarQueryParser($dom);
+ $parser->parse();
+
+ $node = $this->server->tree->getNodeForPath($this->server->getRequestUri());
+ $depth = $this->server->getHTTPDepth(0);
+
+ // The default result is an empty array
+ $result = array();
+
+ // The calendarobject was requested directly. In this case we handle
+ // this locally.
+ if ($depth == 0 && $node instanceof ICalendarObject) {
+
+ $requestedCalendarData = true;
+ $requestedProperties = $parser->requestedProperties;
+
+ if (!in_array('{urn:ietf:params:xml:ns:caldav}calendar-data', $requestedProperties)) {
+
+ // We always retrieve calendar-data, as we need it for filtering.
+ $requestedProperties[] = '{urn:ietf:params:xml:ns:caldav}calendar-data';
+
+ // If calendar-data wasn't explicitly requested, we need to remove
+ // it after processing.
+ $requestedCalendarData = false;
+ }
+
+ $properties = $this->server->getPropertiesForPath(
+ $this->server->getRequestUri(),
+ $requestedProperties,
+ 0
+ );
+
+ // This array should have only 1 element, the first calendar
+ // object.
+ $properties = current($properties);
+
+ // If there wasn't any calendar-data returned somehow, we ignore
+ // this.
+ if (isset($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data'])) {
+
+ $validator = new CalendarQueryValidator();
+
+ $vObject = VObject\Reader::read($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
+ if ($validator->validate($vObject,$parser->filters)) {
+
+ // If the client didn't require the calendar-data property,
+ // we won't give it back.
+ if (!$requestedCalendarData) {
+ unset($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
+ } else {
+ if ($parser->expand) {
+ $vObject->expand($parser->expand['start'], $parser->expand['end']);
+ $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
+ }
+ }
+
+ $result = array($properties);
+
+ }
+
+ }
+
+ }
+ // If we're dealing with a calendar, the calendar itself is responsible
+ // for the calendar-query.
+ if ($node instanceof ICalendar && $depth = 1) {
+
+ $nodePaths = $node->calendarQuery($parser->filters);
+
+ foreach($nodePaths as $path) {
+
+ list($properties) =
+ $this->server->getPropertiesForPath($this->server->getRequestUri() . '/' . $path, $parser->requestedProperties);
+
+ if ($parser->expand) {
+ // We need to do some post-processing
+ $vObject = VObject\Reader::read($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
+ $vObject->expand($parser->expand['start'], $parser->expand['end']);
+ $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
+ }
+
+ $result[] = $properties;
+
+ }
+
+ }
+
+ $prefer = $this->server->getHTTPPRefer();
+
+ $this->server->httpResponse->sendStatus(207);
+ $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
+ $this->server->httpResponse->setHeader('Vary','Brief,Prefer');
+ $this->server->httpResponse->sendBody($this->server->generateMultiStatus($result, $prefer['return-minimal']));
+
+ }
+
+ /**
+ * This method is responsible for parsing the request and generating the
+ * response for the CALDAV:free-busy-query REPORT.
+ *
+ * @param \DOMNode $dom
+ * @return void
+ */
+ protected function freeBusyQueryReport(\DOMNode $dom) {
+
+ $start = null;
+ $end = null;
+
+ foreach($dom->firstChild->childNodes as $childNode) {
+
+ $clark = DAV\XMLUtil::toClarkNotation($childNode);
+ if ($clark == '{' . self::NS_CALDAV . '}time-range') {
+ $start = $childNode->getAttribute('start');
+ $end = $childNode->getAttribute('end');
+ break;
+ }
+
+ }
+ if ($start) {
+ $start = VObject\DateTimeParser::parseDateTime($start);
+ }
+ if ($end) {
+ $end = VObject\DateTimeParser::parseDateTime($end);
+ }
+
+ if (!$start && !$end) {
+ throw new DAV\Exception\BadRequest('The freebusy report must have a time-range filter');
+ }
+ $acl = $this->server->getPlugin('acl');
+
+ if (!$acl) {
+ throw new DAV\Exception('The ACL plugin must be loaded for free-busy queries to work');
+ }
+ $uri = $this->server->getRequestUri();
+ $acl->checkPrivileges($uri,'{' . self::NS_CALDAV . '}read-free-busy');
+
+ $calendar = $this->server->tree->getNodeForPath($uri);
+ if (!$calendar instanceof ICalendar) {
+ throw new DAV\Exception\NotImplemented('The free-busy-query REPORT is only implemented on calendars');
+ }
+
+ // Doing a calendar-query first, to make sure we get the most
+ // performance.
+ $urls = $calendar->calendarQuery(array(
+ 'name' => 'VCALENDAR',
+ 'comp-filters' => array(
+ array(
+ 'name' => 'VEVENT',
+ 'comp-filters' => array(),
+ 'prop-filters' => array(),
+ 'is-not-defined' => false,
+ 'time-range' => array(
+ 'start' => $start,
+ 'end' => $end,
+ ),
+ ),
+ ),
+ 'prop-filters' => array(),
+ 'is-not-defined' => false,
+ 'time-range' => null,
+ ));
+
+ $objects = array_map(function($url) use ($calendar) {
+ $obj = $calendar->getChild($url)->get();
+ return $obj;
+ }, $urls);
+
+ $generator = new VObject\FreeBusyGenerator();
+ $generator->setObjects($objects);
+ $generator->setTimeRange($start, $end);
+ $result = $generator->getResult();
+ $result = $result->serialize();
+
+ $this->server->httpResponse->sendStatus(200);
+ $this->server->httpResponse->setHeader('Content-Type', 'text/calendar');
+ $this->server->httpResponse->setHeader('Content-Length', strlen($result));
+ $this->server->httpResponse->sendBody($result);
+
+ }
+
+ /**
+ * This method is triggered before a file gets updated with new content.
+ *
+ * This plugin uses this method to ensure that CalDAV objects receive
+ * valid calendar data.
+ *
+ * @param string $path
+ * @param DAV\IFile $node
+ * @param resource $data
+ * @return void
+ */
+ public function beforeWriteContent($path, DAV\IFile $node, &$data) {
+
+ if (!$node instanceof ICalendarObject)
+ return;
+
+ $this->validateICalendar($data, $path);
+
+ }
+
+ /**
+ * This method is triggered before a new file is created.
+ *
+ * This plugin uses this method to ensure that newly created calendar
+ * objects contain valid calendar data.
+ *
+ * @param string $path
+ * @param resource $data
+ * @param DAV\ICollection $parentNode
+ * @return void
+ */
+ public function beforeCreateFile($path, &$data, DAV\ICollection $parentNode) {
+
+ if (!$parentNode instanceof Calendar)
+ return;
+
+ $this->validateICalendar($data, $path);
+
+ }
+
+ /**
+ * This event is triggered before any HTTP request is handled.
+ *
+ * We use this to intercept GET calls to notification nodes, and return the
+ * proper response.
+ *
+ * @param string $method
+ * @param string $path
+ * @return void
+ */
+ public function beforeMethod($method, $path) {
+
+ if ($method!=='GET') return;
+
+ try {
+ $node = $this->server->tree->getNodeForPath($path);
+ } catch (DAV\Exception\NotFound $e) {
+ return;
+ }
+
+ if (!$node instanceof Notifications\INode)
+ return;
+
+ if (!$this->server->checkPreconditions(true)) return false;
+ $dom = new \DOMDocument('1.0', 'UTF-8');
+
+ $dom->formatOutput = true;
+
+ $root = $dom->createElement('cs:notification');
+ foreach($this->server->xmlNamespaces as $namespace => $prefix) {
+ $root->setAttribute('xmlns:' . $prefix, $namespace);
+ }
+
+ $dom->appendChild($root);
+ $node->getNotificationType()->serializeBody($this->server, $root);
+
+ $this->server->httpResponse->setHeader('Content-Type','application/xml');
+ $this->server->httpResponse->setHeader('ETag',$node->getETag());
+ $this->server->httpResponse->sendStatus(200);
+ $this->server->httpResponse->sendBody($dom->saveXML());
+
+ return false;
+
+ }
+
+ /**
+ * Checks if the submitted iCalendar data is in fact, valid.
+ *
+ * An exception is thrown if it's not.
+ *
+ * @param resource|string $data
+ * @param string $path
+ * @return void
+ */
+ protected function validateICalendar(&$data, $path) {
+
+ // If it's a stream, we convert it to a string first.
+ if (is_resource($data)) {
+ $data = stream_get_contents($data);
+ }
+
+ // Converting the data to unicode, if needed.
+ $data = DAV\StringUtil::ensureUTF8($data);
+
+ try {
+
+ $vobj = VObject\Reader::read($data);
+
+ } catch (VObject\ParseException $e) {
+
+ throw new DAV\Exception\UnsupportedMediaType('This resource only supports valid iCalendar 2.0 data. Parse error: ' . $e->getMessage());
+
+ }
+
+ if ($vobj->name !== 'VCALENDAR') {
+ throw new DAV\Exception\UnsupportedMediaType('This collection can only support iCalendar objects.');
+ }
+
+ // Get the Supported Components for the target calendar
+ list($parentPath,$object) = DAV\URLUtil::splitPath($path);
+ $calendarProperties = $this->server->getProperties($parentPath,array('{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set'));
+ $supportedComponents = $calendarProperties['{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set']->getValue();
+
+ $foundType = null;
+ $foundUID = null;
+ foreach($vobj->getComponents() as $component) {
+ switch($component->name) {
+ case 'VTIMEZONE' :
+ continue 2;
+ case 'VEVENT' :
+ case 'VTODO' :
+ case 'VJOURNAL' :
+ if (is_null($foundType)) {
+ $foundType = $component->name;
+ if (!in_array($foundType, $supportedComponents)) {
+ throw new Exception\InvalidComponentType('This calendar only supports ' . implode(', ', $supportedComponents) . '. We found a ' . $foundType);
+ }
+ if (!isset($component->UID)) {
+ throw new DAV\Exception\BadRequest('Every ' . $component->name . ' component must have an UID');
+ }
+ $foundUID = (string)$component->UID;
+ } else {
+ if ($foundType !== $component->name) {
+ throw new DAV\Exception\BadRequest('A calendar object must only contain 1 component. We found a ' . $component->name . ' as well as a ' . $foundType);
+ }
+ if ($foundUID !== (string)$component->UID) {
+ throw new DAV\Exception\BadRequest('Every ' . $component->name . ' in this object must have identical UIDs');
+ }
+ }
+ break;
+ default :
+ throw new DAV\Exception\BadRequest('You are not allowed to create components of type: ' . $component->name . ' here');
+
+ }
+ }
+ if (!$foundType)
+ throw new DAV\Exception\BadRequest('iCalendar object must contain at least 1 of VEVENT, VTODO or VJOURNAL');
+
+ }
+
+ /**
+ * This method handles POST requests to the schedule-outbox.
+ *
+ * Currently, two types of requests are support:
+ * * FREEBUSY requests from RFC 6638
+ * * Simple iTIP messages from draft-desruisseaux-caldav-sched-04
+ *
+ * The latter is from an expired early draft of the CalDAV scheduling
+ * extensions, but iCal depends on a feature from that spec, so we
+ * implement it.
+ *
+ * @param Schedule\IOutbox $outboxNode
+ * @param string $outboxUri
+ * @return void
+ */
+ public function outboxRequest(Schedule\IOutbox $outboxNode, $outboxUri) {
+
+ // Parsing the request body
+ try {
+ $vObject = VObject\Reader::read($this->server->httpRequest->getBody(true));
+ } catch (VObject\ParseException $e) {
+ throw new DAV\Exception\BadRequest('The request body must be a valid iCalendar object. Parse error: ' . $e->getMessage());
+ }
+
+ // The incoming iCalendar object must have a METHOD property, and a
+ // component. The combination of both determines what type of request
+ // this is.
+ $componentType = null;
+ foreach($vObject->getComponents() as $component) {
+ if ($component->name !== 'VTIMEZONE') {
+ $componentType = $component->name;
+ break;
+ }
+ }
+ if (is_null($componentType)) {
+ throw new DAV\Exception\BadRequest('We expected at least one VTODO, VJOURNAL, VFREEBUSY or VEVENT component');
+ }
+
+ // Validating the METHOD
+ $method = strtoupper((string)$vObject->METHOD);
+ if (!$method) {
+ throw new DAV\Exception\BadRequest('A METHOD property must be specified in iTIP messages');
+ }
+
+ // So we support two types of requests:
+ //
+ // REQUEST with a VFREEBUSY component
+ // REQUEST, REPLY, ADD, CANCEL on VEVENT components
+
+ $acl = $this->server->getPlugin('acl');
+
+ if ($componentType === 'VFREEBUSY' && $method === 'REQUEST') {
+
+ $acl && $acl->checkPrivileges($outboxUri,'{' . Plugin::NS_CALDAV . '}schedule-query-freebusy');
+ $this->handleFreeBusyRequest($outboxNode, $vObject);
+
+ } elseif ($componentType === 'VEVENT' && in_array($method, array('REQUEST','REPLY','ADD','CANCEL'))) {
+
+ $acl && $acl->checkPrivileges($outboxUri,'{' . Plugin::NS_CALDAV . '}schedule-post-vevent');
+ $this->handleEventNotification($outboxNode, $vObject);
+
+ } else {
+
+ throw new DAV\Exception\NotImplemented('SabreDAV supports only VFREEBUSY (REQUEST) and VEVENT (REQUEST, REPLY, ADD, CANCEL)');
+
+ }
+
+ }
+
+ /**
+ * This method handles the REQUEST, REPLY, ADD and CANCEL methods for
+ * VEVENT iTip messages.
+ *
+ * @return void
+ */
+ protected function handleEventNotification(Schedule\IOutbox $outboxNode, VObject\Component $vObject) {
+
+ $originator = $this->server->httpRequest->getHeader('Originator');
+ $recipients = $this->server->httpRequest->getHeader('Recipient');
+
+ if (!$originator) {
+ throw new DAV\Exception\BadRequest('The Originator: header must be specified when making POST requests');
+ }
+ if (!$recipients) {
+ throw new DAV\Exception\BadRequest('The Recipient: header must be specified when making POST requests');
+ }
+
+ $recipients = explode(',',$recipients);
+ foreach($recipients as $k=>$recipient) {
+
+ $recipient = trim($recipient);
+ if (!preg_match('/^mailto:(.*)@(.*)$/i', $recipient)) {
+ throw new DAV\Exception\BadRequest('Recipients must start with mailto: and must be valid email address');
+ }
+ $recipient = substr($recipient, 7);
+ $recipients[$k] = $recipient;
+ }
+
+ // We need to make sure that 'originator' matches one of the email
+ // addresses of the selected principal.
+ $principal = $outboxNode->getOwner();
+ $props = $this->server->getProperties($principal,array(
+ '{' . self::NS_CALDAV . '}calendar-user-address-set',
+ ));
+
+ $addresses = array();
+ if (isset($props['{' . self::NS_CALDAV . '}calendar-user-address-set'])) {
+ $addresses = $props['{' . self::NS_CALDAV . '}calendar-user-address-set']->getHrefs();
+ }
+
+ $found = false;
+ foreach($addresses as $address) {
+
+ // Trimming the / on both sides, just in case..
+ if (rtrim(strtolower($originator),'/') === rtrim(strtolower($address),'/')) {
+ $found = true;
+ break;
+ }
+
+ }
+
+ if (!$found) {
+ throw new DAV\Exception\Forbidden('The addresses specified in the Originator header did not match any addresses in the owners calendar-user-address-set header');
+ }
+
+ // If the Originator header was a url, and not a mailto: address..
+ // we're going to try to pull the mailto: from the vobject body.
+ if (strtolower(substr($originator,0,7)) !== 'mailto:') {
+ $originator = (string)$vObject->VEVENT->ORGANIZER;
+
+ }
+ if (strtolower(substr($originator,0,7)) !== 'mailto:') {
+ throw new DAV\Exception\Forbidden('Could not find mailto: address in both the Orignator header, and the ORGANIZER property in the VEVENT');
+ }
+ $originator = substr($originator,7);
+
+ $result = $this->iMIPMessage($originator, $recipients, $vObject, $principal);
+ $this->server->httpResponse->sendStatus(200);
+ $this->server->httpResponse->setHeader('Content-Type','application/xml');
+ $this->server->httpResponse->sendBody($this->generateScheduleResponse($result));
+
+ }
+
+ /**
+ * Sends an iMIP message by email.
+ *
+ * This method must return an array with status codes per recipient.
+ * This should look something like:
+ *
+ * array(
+ * 'user1@example.org' => '2.0;Success'
+ * )
+ *
+ * Formatting for this status code can be found at:
+ * https://tools.ietf.org/html/rfc5545#section-3.8.8.3
+ *
+ * A list of valid status codes can be found at:
+ * https://tools.ietf.org/html/rfc5546#section-3.6
+ *
+ * @param string $originator
+ * @param array $recipients
+ * @param VObject\Component $vObject
+ * @param string $principal Principal url
+ * @return array
+ */
+ protected function iMIPMessage($originator, array $recipients, VObject\Component $vObject, $principal) {
+
+ if (!$this->imipHandler) {
+ $resultStatus = '5.2;This server does not support this operation';
+ } else {
+ $this->imipHandler->sendMessage($originator, $recipients, $vObject, $principal);
+ $resultStatus = '2.0;Success';
+ }
+
+ $result = array();
+ foreach($recipients as $recipient) {
+ $result[$recipient] = $resultStatus;
+ }
+
+ return $result;
+
+ }
+
+ /**
+ * Generates a schedule-response XML body
+ *
+ * The recipients array is a key->value list, containing email addresses
+ * and iTip status codes. See the iMIPMessage method for a description of
+ * the value.
+ *
+ * @param array $recipients
+ * @return string
+ */
+ public function generateScheduleResponse(array $recipients) {
+
+ $dom = new \DOMDocument('1.0','utf-8');
+ $dom->formatOutput = true;
+ $xscheduleResponse = $dom->createElement('cal:schedule-response');
+ $dom->appendChild($xscheduleResponse);
+
+ foreach($this->server->xmlNamespaces as $namespace=>$prefix) {
+
+ $xscheduleResponse->setAttribute('xmlns:' . $prefix, $namespace);
+
+ }
+
+ foreach($recipients as $recipient=>$status) {
+ $xresponse = $dom->createElement('cal:response');
+
+ $xrecipient = $dom->createElement('cal:recipient');
+ $xrecipient->appendChild($dom->createTextNode($recipient));
+ $xresponse->appendChild($xrecipient);
+
+ $xrequestStatus = $dom->createElement('cal:request-status');
+ $xrequestStatus->appendChild($dom->createTextNode($status));
+ $xresponse->appendChild($xrequestStatus);
+
+ $xscheduleResponse->appendChild($xresponse);
+
+ }
+
+ return $dom->saveXML();
+
+ }
+
+ /**
+ * This method is responsible for parsing a free-busy query request and
+ * returning it's result.
+ *
+ * @param Schedule\IOutbox $outbox
+ * @param string $request
+ * @return string
+ */
+ protected function handleFreeBusyRequest(Schedule\IOutbox $outbox, VObject\Component $vObject) {
+
+ $vFreeBusy = $vObject->VFREEBUSY;
+ $organizer = $vFreeBusy->organizer;
+
+ $organizer = (string)$organizer;
+
+ // Validating if the organizer matches the owner of the inbox.
+ $owner = $outbox->getOwner();
+
+ $caldavNS = '{' . Plugin::NS_CALDAV . '}';
+
+ $uas = $caldavNS . 'calendar-user-address-set';
+ $props = $this->server->getProperties($owner,array($uas));
+
+ if (empty($props[$uas]) || !in_array($organizer, $props[$uas]->getHrefs())) {
+ throw new DAV\Exception\Forbidden('The organizer in the request did not match any of the addresses for the owner of this inbox');
+ }
+
+ if (!isset($vFreeBusy->ATTENDEE)) {
+ throw new DAV\Exception\BadRequest('You must at least specify 1 attendee');
+ }
+
+ $attendees = array();
+ foreach($vFreeBusy->ATTENDEE as $attendee) {
+ $attendees[]= (string)$attendee;
+ }
+
+
+ if (!isset($vFreeBusy->DTSTART) || !isset($vFreeBusy->DTEND)) {
+ throw new DAV\Exception\BadRequest('DTSTART and DTEND must both be specified');
+ }
+
+ $startRange = $vFreeBusy->DTSTART->getDateTime();
+ $endRange = $vFreeBusy->DTEND->getDateTime();
+
+ $results = array();
+ foreach($attendees as $attendee) {
+ $results[] = $this->getFreeBusyForEmail($attendee, $startRange, $endRange, $vObject);
+ }
+
+ $dom = new \DOMDocument('1.0','utf-8');
+ $dom->formatOutput = true;
+ $scheduleResponse = $dom->createElement('cal:schedule-response');
+ foreach($this->server->xmlNamespaces as $namespace=>$prefix) {
+
+ $scheduleResponse->setAttribute('xmlns:' . $prefix,$namespace);
+
+ }
+ $dom->appendChild($scheduleResponse);
+
+ foreach($results as $result) {
+ $response = $dom->createElement('cal:response');
+
+ $recipient = $dom->createElement('cal:recipient');
+ $recipientHref = $dom->createElement('d:href');
+
+ $recipientHref->appendChild($dom->createTextNode($result['href']));
+ $recipient->appendChild($recipientHref);
+ $response->appendChild($recipient);
+
+ $reqStatus = $dom->createElement('cal:request-status');
+ $reqStatus->appendChild($dom->createTextNode($result['request-status']));
+ $response->appendChild($reqStatus);
+
+ if (isset($result['calendar-data'])) {
+
+ $calendardata = $dom->createElement('cal:calendar-data');
+ $calendardata->appendChild($dom->createTextNode(str_replace("\r\n","\n",$result['calendar-data']->serialize())));
+ $response->appendChild($calendardata);
+
+ }
+ $scheduleResponse->appendChild($response);
+ }
+
+ $this->server->httpResponse->sendStatus(200);
+ $this->server->httpResponse->setHeader('Content-Type','application/xml');
+ $this->server->httpResponse->sendBody($dom->saveXML());
+
+ }
+
+ /**
+ * Returns free-busy information for a specific address. The returned
+ * data is an array containing the following properties:
+ *
+ * calendar-data : A VFREEBUSY VObject
+ * request-status : an iTip status code.
+ * href: The principal's email address, as requested
+ *
+ * The following request status codes may be returned:
+ * * 2.0;description
+ * * 3.7;description
+ *
+ * @param string $email address
+ * @param \DateTime $start
+ * @param \DateTime $end
+ * @param VObject\Component $request
+ * @return array
+ */
+ protected function getFreeBusyForEmail($email, \DateTime $start, \DateTime $end, VObject\Component $request) {
+
+ $caldavNS = '{' . Plugin::NS_CALDAV . '}';
+
+ $aclPlugin = $this->server->getPlugin('acl');
+ if (substr($email,0,7)==='mailto:') $email = substr($email,7);
+
+ $result = $aclPlugin->principalSearch(
+ array('{http://sabredav.org/ns}email-address' => $email),
+ array(
+ '{DAV:}principal-URL', $caldavNS . 'calendar-home-set',
+ '{http://sabredav.org/ns}email-address',
+ )
+ );
+
+ if (!count($result)) {
+ return array(
+ 'request-status' => '3.7;Could not find principal',
+ 'href' => 'mailto:' . $email,
+ );
+ }
+
+ if (!isset($result[0][200][$caldavNS . 'calendar-home-set'])) {
+ return array(
+ 'request-status' => '3.7;No calendar-home-set property found',
+ 'href' => 'mailto:' . $email,
+ );
+ }
+ $homeSet = $result[0][200][$caldavNS . 'calendar-home-set']->getHref();
+
+ // Grabbing the calendar list
+ $objects = array();
+ foreach($this->server->tree->getNodeForPath($homeSet)->getChildren() as $node) {
+ if (!$node instanceof ICalendar) {
+ continue;
+ }
+ $aclPlugin->checkPrivileges($homeSet . $node->getName() ,$caldavNS . 'read-free-busy');
+
+ // Getting the list of object uris within the time-range
+ $urls = $node->calendarQuery(array(
+ 'name' => 'VCALENDAR',
+ 'comp-filters' => array(
+ array(
+ 'name' => 'VEVENT',
+ 'comp-filters' => array(),
+ 'prop-filters' => array(),
+ 'is-not-defined' => false,
+ 'time-range' => array(
+ 'start' => $start,
+ 'end' => $end,
+ ),
+ ),
+ ),
+ 'prop-filters' => array(),
+ 'is-not-defined' => false,
+ 'time-range' => null,
+ ));
+
+ $calObjects = array_map(function($url) use ($node) {
+ $obj = $node->getChild($url)->get();
+ return $obj;
+ }, $urls);
+
+ $objects = array_merge($objects,$calObjects);
+
+ }
+
+ $vcalendar = new VObject\Component\VCalendar();
+ $vcalendar->VERSION = '2.0';
+ $vcalendar->METHOD = 'REPLY';
+ $vcalendar->CALSCALE = 'GREGORIAN';
+ $vcalendar->PRODID = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
+
+ $generator = new VObject\FreeBusyGenerator();
+ $generator->setObjects($objects);
+ $generator->setTimeRange($start, $end);
+ $generator->setBaseObject($vcalendar);
+
+ $result = $generator->getResult();
+
+ $vcalendar->VFREEBUSY->ATTENDEE = 'mailto:' . $email;
+ $vcalendar->VFREEBUSY->UID = (string)$request->VFREEBUSY->UID;
+ $vcalendar->VFREEBUSY->ORGANIZER = clone $request->VFREEBUSY->ORGANIZER;
+
+ return array(
+ 'calendar-data' => $result,
+ 'request-status' => '2.0;Success',
+ 'href' => 'mailto:' . $email,
+ );
+ }
+
+ /**
+ * This method is used to generate HTML output for the
+ * DAV\Browser\Plugin. This allows us to generate an interface users
+ * can use to create new calendars.
+ *
+ * @param DAV\INode $node
+ * @param string $output
+ * @return bool
+ */
+ public function htmlActionsPanel(DAV\INode $node, &$output) {
+
+ if (!$node instanceof UserCalendars)
+ return;
+
+ $output.= '<tr><td colspan="2"><form method="post" action="">
+ <h3>Create new calendar</h3>
+ <input type="hidden" name="sabreAction" value="mkcalendar" />
+ <label>Name (uri):</label> <input type="text" name="name" /><br />
+ <label>Display name:</label> <input type="text" name="{DAV:}displayname" /><br />
+ <input type="submit" value="create" />
+ </form>
+ </td></tr>';
+
+ return false;
+
+ }
+
+ /**
+ * This method allows us to intercept the 'mkcalendar' sabreAction. This
+ * action enables the user to create new calendars from the browser plugin.
+ *
+ * @param string $uri
+ * @param string $action
+ * @param array $postVars
+ * @return bool
+ */
+ public function browserPostAction($uri, $action, array $postVars) {
+
+ if ($action!=='mkcalendar')
+ return;
+
+ $resourceType = array('{DAV:}collection','{urn:ietf:params:xml:ns:caldav}calendar');
+ $properties = array();
+ if (isset($postVars['{DAV:}displayname'])) {
+ $properties['{DAV:}displayname'] = $postVars['{DAV:}displayname'];
+ }
+ $this->server->createCollection($uri . '/' . $postVars['name'],$resourceType,$properties);
+ return false;
+
+ }
+
+}

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