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Plugin.php
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<?php
namespace Sabre\CalDAV\Schedule;
use DateTimeZone;
use Sabre\DAV\Server;
use Sabre\DAV\ServerPlugin;
use Sabre\DAV\PropFind;
use Sabre\DAV\INode;
use Sabre\DAV\Xml\Property\Href;
use Sabre\HTTP\RequestInterface;
use Sabre\HTTP\ResponseInterface;
use Sabre\VObject;
use Sabre\VObject\Reader;
use Sabre\VObject\Component\VCalendar;
use Sabre\VObject\ITip;
use Sabre\VObject\ITip\Message;
use Sabre\DAVACL;
use Sabre\CalDAV\ICalendar;
use Sabre\CalDAV\ICalendarObject;
use Sabre\CalDAV\Xml\Property\ScheduleCalendarTransp;
use Sabre\DAV\Exception\NotFound;
use Sabre\DAV\Exception\Forbidden;
use Sabre\DAV\Exception\BadRequest;
use Sabre\DAV\Exception\NotImplemented;
/**
* CalDAV scheduling plugin.
* =========================
*
* This plugin provides the functionality added by the "Scheduling Extensions
* to CalDAV" standard, as defined in RFC6638.
*
* calendar-auto-schedule largely works by intercepting a users request to
* update their local calendar. If a user creates a new event with attendees,
* this plugin is supposed to grab the information from that event, and notify
* the attendees of this.
*
* There's 3 possible transports for this:
* * local delivery
* * delivery through email (iMip)
* * server-to-server delivery (iSchedule)
*
* iMip is simply, because we just need to add the iTip message as an email
* attachment. Local delivery is harder, because we both need to add this same
* message to a local DAV inbox, as well as live-update the relevant events.
*
* iSchedule is something for later.
*
* @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 ServerPlugin {
/**
* This is the official CalDAV namespace
*/
const NS_CALDAV = 'urn:ietf:params:xml:ns:caldav';
/**
* Reference to main Server object.
*
* @var Server
*/
protected $server;
/**
* Returns a list of features for the DAV: HTTP header.
*
* @return array
*/
function getFeatures() {
return ['calendar-auto-schedule'];
}
/**
* Returns the name of the plugin.
*
* Using this name other plugins will be able to access other plugins
* using Server::getPlugin
*
* @return string
*/
function getPluginName() {
return 'caldav-schedule';
}
/**
* Initializes the plugin
*
* @param Server $server
* @return void
*/
function initialize(Server $server) {
$this->server = $server;
$server->on('method:POST', [$this, 'httpPost']);
$server->on('propFind', [$this, 'propFind']);
$server->on('calendarObjectChange', [$this, 'calendarObjectChange']);
$server->on('beforeUnbind', [$this, 'beforeUnbind']);
$server->on('schedule', [$this, 'scheduleLocalDelivery']);
$ns = '{' . self::NS_CALDAV . '}';
/**
* This information ensures that the {DAV:}resourcetype property has
* the correct values.
*/
$server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IOutbox'] = $ns . 'schedule-outbox';
$server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IInbox'] = $ns . 'schedule-inbox';
/**
* Properties we protect are made read-only by the server.
*/
array_push($server->protectedProperties,
$ns . 'schedule-inbox-URL',
$ns . 'schedule-outbox-URL',
$ns . 'calendar-user-address-set',
$ns . 'calendar-user-type',
$ns . 'schedule-default-calendar-URL'
);
}
/**
* 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 $uri
* @return array
*/
function getHTTPMethods($uri) {
try {
$node = $this->server->tree->getNodeForPath($uri);
} catch (NotFound $e) {
return [];
}
if ($node instanceof IOutbox) {
return ['POST'];
}
return [];
}
/**
* This method handles POST request for the outbox.
*
* @param RequestInterface $request
* @param ResponseInterface $response
* @return bool
*/
function httpPost(RequestInterface $request, ResponseInterface $response) {
// Checking if this is a text/calendar content type
$contentType = $request->getHeader('Content-Type');
if (strpos($contentType, 'text/calendar') !== 0) {
return;
}
$path = $request->getPath();
// Checking if we're talking to an outbox
try {
$node = $this->server->tree->getNodeForPath($path);
} catch (NotFound $e) {
return;
}
if (!$node instanceof IOutbox)
return;
$this->server->transactionType = 'post-caldav-outbox';
$this->outboxRequest($node, $request, $response);
// Returning false breaks the event chain and tells the server we've
// handled the request.
return false;
}
/**
* This method handler is invoked during fetching of properties.
*
* We use this event to add calendar-auto-schedule-specific properties.
*
* @param PropFind $propFind
* @param INode $node
* @return void
*/
function propFind(PropFind $propFind, INode $node) {
if (!$node instanceof DAVACL\IPrincipal) return;
$caldavPlugin = $this->server->getPlugin('caldav');
$principalUrl = $node->getPrincipalUrl();
// schedule-outbox-URL property
$propFind->handle('{' . self::NS_CALDAV . '}schedule-outbox-URL', function() use ($principalUrl, $caldavPlugin) {
$calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
$outboxPath = $calendarHomePath . '/outbox/';
return new Href($outboxPath);
});
// schedule-inbox-URL property
$propFind->handle('{' . self::NS_CALDAV . '}schedule-inbox-URL', function() use ($principalUrl, $caldavPlugin) {
$calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
$inboxPath = $calendarHomePath . '/inbox/';
return new Href($inboxPath);
});
$propFind->handle('{' . self::NS_CALDAV . '}schedule-default-calendar-URL', function() use ($principalUrl, $caldavPlugin) {
// We don't support customizing this property yet, so in the
// meantime we just grab the first calendar in the home-set.
$calendarHomePath = $caldavPlugin->getCalendarHomeForPrincipal($principalUrl);
$sccs = '{' . self::NS_CALDAV . '}supported-calendar-component-set';
$result = $this->server->getPropertiesForPath($calendarHomePath, [
'{DAV:}resourcetype',
$sccs,
], 1);
foreach ($result as $child) {
if (!isset($child[200]['{DAV:}resourcetype']) || !$child[200]['{DAV:}resourcetype']->is('{' . self::NS_CALDAV . '}calendar') || $child[200]['{DAV:}resourcetype']->is('{http://calendarserver.org/ns/}shared')) {
// Node is either not a calendar or a shared instance.
continue;
}
if (!isset($child[200][$sccs]) || in_array('VEVENT', $child[200][$sccs]->getValue())) {
// Either there is no supported-calendar-component-set
// (which is fine) or we found one that supports VEVENT.
return new Href($child['href']);
}
}
});
// The server currently reports every principal to be of type
// 'INDIVIDUAL'
$propFind->handle('{' . self::NS_CALDAV . '}calendar-user-type', function() {
return 'INDIVIDUAL';
});
}
/**
* This method is triggered whenever there was a calendar object gets
* created or updated.
*
* @param RequestInterface $request HTTP request
* @param ResponseInterface $response HTTP Response
* @param VCalendar $vCal Parsed iCalendar object
* @param mixed $calendarPath Path to calendar collection
* @param mixed $modified The iCalendar object has been touched.
* @param mixed $isNew Whether this was a new item or we're updating one
* @return void
*/
function calendarObjectChange(RequestInterface $request, ResponseInterface $response, VCalendar $vCal, $calendarPath, &$modified, $isNew) {
if (!$this->scheduleReply($this->server->httpRequest)) {
return;
}
$calendarNode = $this->server->tree->getNodeForPath($calendarPath);
$addresses = $this->getAddressesForPrincipal(
$calendarNode->getOwner()
);
if (!$isNew) {
$node = $this->server->tree->getNodeForPath($request->getPath());
$oldObj = Reader::read($node->get());
} else {
$oldObj = null;
}
$this->processICalendarChange($oldObj, $vCal, $addresses, [], $modified);
}
/**
* This method is responsible for delivering the ITip message.
*
* @param ITip\Message $itipMessage
* @return void
*/
function deliver(ITip\Message $iTipMessage) {
$this->server->emit('schedule', [$iTipMessage]);
if (!$iTipMessage->scheduleStatus) {
$iTipMessage->scheduleStatus = '5.2;There was no system capable of delivering the scheduling message';
}
// In case the change was considered 'insignificant', we are going to
// remove any error statuses, if any. See ticket #525.
list($baseCode) = explode('.', $iTipMessage->scheduleStatus);
if (!$iTipMessage->significantChange && in_array($baseCode, ['3', '5'])) {
$iTipMessage->scheduleStatus = null;
}
}
/**
* This method is triggered before a file gets deleted.
*
* We use this event to make sure that when this happens, attendees get
* cancellations, and organizers get 'DECLINED' statuses.
*
* @param string $path
* @return void
*/
function beforeUnbind($path) {
// FIXME: We shouldn't trigger this functionality when we're issuing a
// MOVE. This is a hack.
if ($this->server->httpRequest->getMethod() === 'MOVE') return;
$node = $this->server->tree->getNodeForPath($path);
if (!$node instanceof ICalendarObject || $node instanceof ISchedulingObject) {
return;
}
if (!$this->scheduleReply($this->server->httpRequest)) {
return;
}
$addresses = $this->getAddressesForPrincipal(
$node->getOwner()
);
$broker = new ITip\Broker();
$messages = $broker->parseEvent(null, $addresses, $node->get());
foreach ($messages as $message) {
$this->deliver($message);
}
}
/**
* Event handler for the 'schedule' event.
*
* This handler attempts to look at local accounts to deliver the
* scheduling object.
*
* @param ITip\Message $iTipMessage
* @return void
*/
function scheduleLocalDelivery(ITip\Message $iTipMessage) {
$aclPlugin = $this->server->getPlugin('acl');
// Local delivery is not available if the ACL plugin is not loaded.
if (!$aclPlugin) {
return;
}
$caldavNS = '{' . self::NS_CALDAV . '}';
$principalUri = $aclPlugin->getPrincipalByUri($iTipMessage->recipient);
if (!$principalUri) {
$iTipMessage->scheduleStatus = '3.7;Could not find principal.';
return;
}
// We found a principal URL, now we need to find its inbox.
// Unfortunately we may not have sufficient privileges to find this, so
// we are temporarily turning off ACL to let this come through.
//
// Once we support PHP 5.5, this should be wrapped in a try..finally
// block so we can ensure that this privilege gets added again after.
$this->server->removeListener('propFind', [$aclPlugin, 'propFind']);
$result = $this->server->getProperties(
$principalUri,
[
'{DAV:}principal-URL',
$caldavNS . 'calendar-home-set',
$caldavNS . 'schedule-inbox-URL',
$caldavNS . 'schedule-default-calendar-URL',
'{http://sabredav.org/ns}email-address',
]
);
// Re-registering the ACL event
$this->server->on('propFind', [$aclPlugin, 'propFind'], 20);
if (!isset($result[$caldavNS . 'schedule-inbox-URL'])) {
$iTipMessage->scheduleStatus = '5.2;Could not find local inbox';
return;
}
if (!isset($result[$caldavNS . 'calendar-home-set'])) {
$iTipMessage->scheduleStatus = '5.2;Could not locate a calendar-home-set';
return;
}
if (!isset($result[$caldavNS . 'schedule-default-calendar-URL'])) {
$iTipMessage->scheduleStatus = '5.2;Could not find a schedule-default-calendar-URL property';
return;
}
$calendarPath = $result[$caldavNS . 'schedule-default-calendar-URL']->getHref();
$homePath = $result[$caldavNS . 'calendar-home-set']->getHref();
$inboxPath = $result[$caldavNS . 'schedule-inbox-URL']->getHref();
if ($iTipMessage->method === 'REPLY') {
$privilege = 'schedule-deliver-reply';
} else {
$privilege = 'schedule-deliver-invite';
}
if (!$aclPlugin->checkPrivileges($inboxPath, $caldavNS . $privilege, DAVACL\Plugin::R_PARENT, false)) {
$iTipMessage->scheduleStatus = '3.8;organizer did not have the ' . $privilege . ' privilege on the attendees inbox';
return;
}
// Next, we're going to find out if the item already exits in one of
// the users' calendars.
$uid = $iTipMessage->uid;
$newFileName = 'sabredav-' . \Sabre\DAV\UUIDUtil::getUUID() . '.ics';
$home = $this->server->tree->getNodeForPath($homePath);
$inbox = $this->server->tree->getNodeForPath($inboxPath);
$currentObject = null;
$objectNode = null;
$isNewNode = false;
$result = $home->getCalendarObjectByUID($uid);
if ($result) {
// There was an existing object, we need to update probably.
$objectPath = $homePath . '/' . $result;
$objectNode = $this->server->tree->getNodeForPath($objectPath);
$oldICalendarData = $objectNode->get();
$currentObject = Reader::read($oldICalendarData);
} else {
$isNewNode = true;
}
$broker = new ITip\Broker();
$newObject = $broker->processMessage($iTipMessage, $currentObject);
$inbox->createFile($newFileName, $iTipMessage->message->serialize());
if (!$newObject) {
// We received an iTip message referring to a UID that we don't
// have in any calendars yet, and processMessage did not give us a
// calendarobject back.
//
// The implication is that processMessage did not understand the
// iTip message.
$iTipMessage->scheduleStatus = '5.0;iTip message was not processed by the server, likely because we didn\'t understand it.';
return;
}
// Note that we are bypassing ACL on purpose by calling this directly.
// We may need to look a bit deeper into this later. Supporting ACL
// here would be nice.
if ($isNewNode) {
$calendar = $this->server->tree->getNodeForPath($calendarPath);
$calendar->createFile($newFileName, $newObject->serialize());
} else {
// If the message was a reply, we may have to inform other
// attendees of this attendees status. Therefore we're shooting off
// another itipMessage.
if ($iTipMessage->method === 'REPLY') {
$this->processICalendarChange(
$oldICalendarData,
$newObject,
[$iTipMessage->recipient],
[$iTipMessage->sender]
);
}
$objectNode->put($newObject->serialize());
}
$iTipMessage->scheduleStatus = '1.2;Message delivered locally';
}
/**
* This method looks at an old iCalendar object, a new iCalendar object and
* starts sending scheduling messages based on the changes.
*
* A list of addresses needs to be specified, so the system knows who made
* the update, because the behavior may be different based on if it's an
* attendee or an organizer.
*
* This method may update $newObject to add any status changes.
*
* @param VCalendar|string $oldObject
* @param VCalendar $newObject
* @param array $addresses
* @param array $ignore Any addresses to not send messages to.
* @param bool $modified A marker to indicate that the original object
* modified by this process.
* @return void
*/
protected function processICalendarChange($oldObject = null, VCalendar $newObject, array $addresses, array $ignore = [], &$modified = false) {
$broker = new ITip\Broker();
$messages = $broker->parseEvent($newObject, $addresses, $oldObject);
if ($messages) $modified = true;
foreach ($messages as $message) {
if (in_array($message->recipient, $ignore)) {
continue;
}
$this->deliver($message);
if (isset($newObject->VEVENT->ORGANIZER) && ($newObject->VEVENT->ORGANIZER->getNormalizedValue() === $message->recipient)) {
if ($message->scheduleStatus) {
$newObject->VEVENT->ORGANIZER['SCHEDULE-STATUS'] = $message->getScheduleStatus();
}
unset($newObject->VEVENT->ORGANIZER['SCHEDULE-FORCE-SEND']);
} else {
if (isset($newObject->VEVENT->ATTENDEE)) foreach ($newObject->VEVENT->ATTENDEE as $attendee) {
if ($attendee->getNormalizedValue() === $message->recipient) {
if ($message->scheduleStatus) {
$attendee['SCHEDULE-STATUS'] = $message->getScheduleStatus();
}
unset($attendee['SCHEDULE-FORCE-SEND']);
break;
}
}
}
}
}
/**
* Returns a list of addresses that are associated with a principal.
*
* @param string $principal
* @return array
*/
protected function getAddressesForPrincipal($principal) {
$CUAS = '{' . self::NS_CALDAV . '}calendar-user-address-set';
$properties = $this->server->getProperties(
$principal,
[$CUAS]
);
// If we can't find this information, we'll stop processing
if (!isset($properties[$CUAS])) {
return;
}
$addresses = $properties[$CUAS]->getHrefs();
return $addresses;
}
/**
* 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 IOutbox $outboxNode
* @param RequestInterface $request
* @param ResponseInterface $response
* @return void
*/
function outboxRequest(IOutbox $outboxNode, RequestInterface $request, ResponseInterface $response) {
$outboxPath = $request->getPath();
// Parsing the request body
try {
$vObject = VObject\Reader::read($request->getBody());
} catch (VObject\ParseException $e) {
throw new 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 BadRequest('We expected at least one VTODO, VJOURNAL, VFREEBUSY or VEVENT component');
}
// Validating the METHOD
$method = strtoupper((string)$vObject->METHOD);
if (!$method) {
throw new BadRequest('A METHOD property must be specified in iTIP messages');
}
// So we support one type of request:
//
// REQUEST with a VFREEBUSY component
$acl = $this->server->getPlugin('acl');
if ($componentType === 'VFREEBUSY' && $method === 'REQUEST') {
$acl && $acl->checkPrivileges($outboxPath, '{' . self::NS_CALDAV . '}schedule-query-freebusy');
$this->handleFreeBusyRequest($outboxNode, $vObject, $request, $response);
} else {
throw new NotImplemented('We only support VFREEBUSY (REQUEST) on this endpoint');
}
}
/**
* This method is responsible for parsing a free-busy query request and
* returning it's result.
*
* @param IOutbox $outbox
* @param VObject\Component $vObject
* @param RequestInterface $request
* @param ResponseInterface $response
* @return string
*/
protected function handleFreeBusyRequest(IOutbox $outbox, VObject\Component $vObject, RequestInterface $request, ResponseInterface $response) {
$vFreeBusy = $vObject->VFREEBUSY;
$organizer = $vFreeBusy->organizer;
$organizer = (string)$organizer;
// Validating if the organizer matches the owner of the inbox.
$owner = $outbox->getOwner();
$caldavNS = '{' . self::NS_CALDAV . '}';
$uas = $caldavNS . 'calendar-user-address-set';
$props = $this->server->getProperties($owner, [$uas]);
if (empty($props[$uas]) || !in_array($organizer, $props[$uas]->getHrefs())) {
throw new 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 BadRequest('You must at least specify 1 attendee');
}
$attendees = [];
foreach ($vFreeBusy->ATTENDEE as $attendee) {
$attendees[] = (string)$attendee;
}
if (!isset($vFreeBusy->DTSTART) || !isset($vFreeBusy->DTEND)) {
throw new BadRequest('DTSTART and DTEND must both be specified');
}
$startRange = $vFreeBusy->DTSTART->getDateTime();
$endRange = $vFreeBusy->DTEND->getDateTime();
$results = [];
foreach ($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->xml->namespaceMap as $namespace => $prefix) {
$scheduleResponse->setAttribute('xmlns:' . $prefix, $namespace);
}
$dom->appendChild($scheduleResponse);
foreach ($results as $result) {
$xresponse = $dom->createElement('cal:response');
$recipient = $dom->createElement('cal:recipient');
$recipientHref = $dom->createElement('d:href');
$recipientHref->appendChild($dom->createTextNode($result['href']));
$recipient->appendChild($recipientHref);
$xresponse->appendChild($recipient);
$reqStatus = $dom->createElement('cal:request-status');
$reqStatus->appendChild($dom->createTextNode($result['request-status']));
$xresponse->appendChild($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())));
$xresponse->appendChild($calendardata);
}
$scheduleResponse->appendChild($xresponse);
}
$response->setStatus(200);
$response->setHeader('Content-Type', 'application/xml');
$response->setBody($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 = '{' . self::NS_CALDAV . '}';
$aclPlugin = $this->server->getPlugin('acl');
if (substr($email, 0, 7) === 'mailto:') $email = substr($email, 7);
$result = $aclPlugin->principalSearch(
['{http://sabredav.org/ns}email-address' => $email],
[
'{DAV:}principal-URL', $caldavNS . 'calendar-home-set',
'{http://sabredav.org/ns}email-address',
]
);
if (!count($result)) {
return [
'request-status' => '3.7;Could not find principal',
'href' => 'mailto:' . $email,
];
}
if (!isset($result[0][200][$caldavNS . 'calendar-home-set'])) {
return [
'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 = [];
$calendarTimeZone = new DateTimeZone('UTC');
foreach ($this->server->tree->getNodeForPath($homeSet)->getChildren() as $node) {
if (!$node instanceof ICalendar) {
continue;
}
$sct = $caldavNS . 'schedule-calendar-transp';
$ctz = $caldavNS . 'calendar-timezone';
$props = $node->getProperties([$sct, $ctz]);
if (isset($props[$sct]) && $props[$sct]->getValue() == ScheduleCalendarTransp::TRANSPARENT) {
// If a calendar is marked as 'transparent', it means we must
// ignore it for free-busy purposes.
continue;
}
$aclPlugin->checkPrivileges($homeSet . $node->getName(), $caldavNS . 'read-free-busy');
if (isset($props[$ctz])) {
$vtimezoneObj = VObject\Reader::read($props[$ctz]);
$calendarTimeZone = $vtimezoneObj->VTIMEZONE->getTimeZone();
}
// Getting the list of object uris within the time-range
$urls = $node->calendarQuery([
'name' => 'VCALENDAR',
'comp-filters' => [
[
'name' => 'VEVENT',
'comp-filters' => [],
'prop-filters' => [],
'is-not-defined' => false,
'time-range' => [
'start' => $start,
'end' => $end,
],
],
],
'prop-filters' => [],
'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->METHOD = 'REPLY';
$generator = new VObject\FreeBusyGenerator();
$generator->setObjects($objects);
$generator->setTimeRange($start, $end);
$generator->setBaseObject($vcalendar);
$generator->setTimeZone($calendarTimeZone);
$result = $generator->getResult();
$vcalendar->VFREEBUSY->ATTENDEE = 'mailto:' . $email;
$vcalendar->VFREEBUSY->UID = (string)$request->VFREEBUSY->UID;
$vcalendar->VFREEBUSY->ORGANIZER = clone $request->VFREEBUSY->ORGANIZER;
return [
'calendar-data' => $result,
'request-status' => '2.0;Success',
'href' => 'mailto:' . $email,
];
}
/**
* This method checks the 'Schedule-Reply' header
* and returns false if it's 'F', otherwise true.
*
* @param RequestInterface $request
* @return bool
*/
private function scheduleReply(RequestInterface $request) {
$scheduleReply = $request->getHeader('Schedule-Reply');
return $scheduleReply !== 'F';
}
/**
* Returns a bunch of meta-data about the plugin.
*
* Providing this information is optional, and is mainly displayed by the
* Browser plugin.
*
* The description key in the returned array may contain html and will not
* be sanitized.
*
* @return array
*/
function getPluginInfo() {
return [
'name' => $this->getPluginName(),
'description' => 'Adds calendar-auto-schedule, as defined in rf6868',
'link' => 'http://sabre.io/dav/scheduling/',
];
}
}

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