<?php
namespace Sabre\VObject\ITip;
use Sabre\VObject\Component\VCalendar;
use Sabre\VObject\DateTimeParser;
use Sabre\VObject\Reader;
use Sabre\VObject\Recur\EventIterator;
/**
* The ITip\Broker class is a utility class that helps with processing
* so-called iTip messages.
*
* iTip is defined in rfc5546, stands for iCalendar Transport-Independent
* Interoperability Protocol, and describes the underlying mechanism for
* using iCalendar for scheduling for for example through email (also known as
* IMip) and CalDAV Scheduling.
*
* This class helps by:
*
* 1. Creating individual invites based on an iCalendar event for each
* attendee.
* 2. Generating invite updates based on an iCalendar update. This may result
* in new invites, updates and cancellations for attendees, if that list
* changed.
* 3. On the receiving end, it can create a local iCalendar event based on
* a received invite.
* 4. It can also process an invite update on a local event, ensuring that any
* overridden properties from attendees are retained.
* 5. It can create a accepted or declined iTip reply based on an invite.
* 6. It can process a reply from an invite and update an events attendee
* status based on a reply.
*
* @copyright Copyright (C) fruux GmbH (https://fruux.com/)
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class Broker {
/**
* This setting determines whether the rules for the SCHEDULE-AGENT
* parameter should be followed.
*
* This is a parameter defined on ATTENDEE properties, introduced by RFC
* 6638. This parameter allows a caldav client to tell the server 'Don't do
* any scheduling operations'.
*
* If this setting is turned on, any attendees with SCHEDULE-AGENT set to
* CLIENT will be ignored. This is the desired behavior for a CalDAV
* server, but if you're writing an iTip application that doesn't deal with
* CalDAV, you may want to ignore this parameter.
*
* @var bool
*/
public $scheduleAgentServerRules = true;
/**
* The broker will try during 'parseEvent' figure out whether the change
* was significant.
*
* It uses a few different ways to do this. One of these ways is seeing if
* certain properties changed values. This list of specified here.
*
* This list is taken from:
* * http://tools.ietf.org/html/rfc5546#section-2.1.4
*
* @var string[]
*/
public $significantChangeProperties = [
'DTSTART',
'DTEND',
'DURATION',
'DUE',
'RRULE',
'RDATE',
'EXDATE',
'STATUS',
];
/**
* This method is used to process an incoming itip message.
*
* Examples:
*
* 1. A user is an attendee to an event. The organizer sends an updated
* meeting using a new iTip message with METHOD:REQUEST. This function
* will process the message and update the attendee's event accordingly.
*
* 2. The organizer cancelled the event using METHOD:CANCEL. We will update
* the users event to state STATUS:CANCELLED.
*
* 3. An attendee sent a reply to an invite using METHOD:REPLY. We can
* update the organizers event to update the ATTENDEE with its correct
* PARTSTAT.
*
* The $existingObject is updated in-place. If there is no existing object
* (because it's a new invite for example) a new object will be created.
*
* If an existing object does not exist, and the method was CANCEL or
* REPLY, the message effectively gets ignored, and no 'existingObject'
* will be created.
*
* The updated $existingObject is also returned from this function.
*
* If the iTip message was not supported, we will always return false.
*
* @param Message $itipMessage
* @param VCalendar $existingObject
*
* @return VCalendar|null
*/
function processMessage(Message $itipMessage, VCalendar $existingObject = null) {
// We only support events at the moment.
if ($itipMessage->component !== 'VEVENT') {
return false;
}
switch ($itipMessage->method) {
case 'REQUEST' :
return $this->processMessageRequest($itipMessage, $existingObject);
case 'CANCEL' :
return $this->processMessageCancel($itipMessage, $existingObject);
case 'REPLY' :
return $this->processMessageReply($itipMessage, $existingObject);
default :
// Unsupported iTip message
return;
}
return $existingObject;
}
/**
* This function parses a VCALENDAR object and figure out if any messages
* need to be sent.
*
* A VCALENDAR object will be created from the perspective of either an
* attendee, or an organizer. You must pass a string identifying the
* current user, so we can figure out who in the list of attendees or the
* organizer we are sending this message on behalf of.
*
* It's possible to specify the current user as an array, in case the user
* has more than one identifying href (such as multiple emails).
*
* It $oldCalendar is specified, it is assumed that the operation is
* updating an existing event, which means that we need to look at the
* differences between events, and potentially send old attendees
* cancellations, and current attendees updates.
*
* If $calendar is null, but $oldCalendar is specified, we treat the
* operation as if the user has deleted an event. If the user was an
* organizer, this means that we need to send cancellation notices to
* people. If the user was an attendee, we need to make sure that the
* organizer gets the 'declined' message.
*
* @param VCalendar|string $calendar
* @param string|array $userHref
* @param VCalendar|string $oldCalendar
*
* @return array
*/
function parseEvent($calendar = null, $userHref, $oldCalendar = null) {
if ($oldCalendar) {
if (is_string($oldCalendar)) {
$oldCalendar = Reader::read($oldCalendar);
}
if (!isset($oldCalendar->VEVENT)) {
// We only support events at the moment
return [];
}
$oldEventInfo = $this->parseEventInfo($oldCalendar);
} else {
$oldEventInfo = [
'organizer' => null,
'significantChangeHash' => '',
'attendees' => [],
];
}
$userHref = (array)$userHref;
if (!is_null($calendar)) {
if (is_string($calendar)) {
$calendar = Reader::read($calendar);
}
if (!isset($calendar->VEVENT)) {
// We only support events at the moment
return [];
}
$eventInfo = $this->parseEventInfo($calendar);
if (!$eventInfo['attendees'] && !$oldEventInfo['attendees']) {
// If there were no attendees on either side of the equation,
// we don't need to do anything.
return [];
}
if (!$eventInfo['organizer'] && !$oldEventInfo['organizer']) {
// There was no organizer before or after the change.
return [];
}
$baseCalendar = $calendar;
// If the new object didn't have an organizer, the organizer
// changed the object from a scheduling object to a non-scheduling
// object. We just copy the info from the old object.
if (!$eventInfo['organizer'] && $oldEventInfo['organizer']) {
$eventInfo['organizer'] = $oldEventInfo['organizer'];
$eventInfo['organizerName'] = $oldEventInfo['organizerName'];
}
} else {
// The calendar object got deleted, we need to process this as a
// cancellation / decline.
if (!$oldCalendar) {
// No old and no new calendar, there's no thing to do.
return [];
}
$eventInfo = $oldEventInfo;
if (in_array($eventInfo['organizer'], $userHref)) {
// This is an organizer deleting the event.
$eventInfo['attendees'] = [];
// Increasing the sequence, but only if the organizer deleted
// the event.
$eventInfo['sequence']++;
} else {
// This is an attendee deleting the event.
foreach ($eventInfo['attendees'] as $key => $attendee) {
if (in_array($attendee['href'], $userHref)) {
$eventInfo['attendees'][$key]['instances'] = ['master' =>
['id' => 'master', 'partstat' => 'DECLINED']
];
}
}
}
$baseCalendar = $oldCalendar;
}
if (in_array($eventInfo['organizer'], $userHref)) {
return $this->parseEventForOrganizer($baseCalendar, $eventInfo, $oldEventInfo);
} elseif ($oldCalendar) {
// We need to figure out if the user is an attendee, but we're only
// doing so if there's an oldCalendar, because we only want to
// process updates, not creation of new events.
foreach ($eventInfo['attendees'] as $attendee) {
if (in_array($attendee['href'], $userHref)) {
return $this->parseEventForAttendee($baseCalendar, $eventInfo, $oldEventInfo, $attendee['href']);
}
}
}
return [];
}
/**
* Processes incoming REQUEST messages.
*
* This is message from an organizer, and is either a new event
* invite, or an update to an existing one.
*
*
* @param Message $itipMessage
* @param VCalendar $existingObject
*
* @return VCalendar|null
*/
protected function processMessageRequest(Message $itipMessage, VCalendar $existingObject = null) {
if (!$existingObject) {
// This is a new invite, and we're just going to copy over
// all the components from the invite.
$existingObject = new VCalendar();
foreach ($itipMessage->message->getComponents() as $component) {
$existingObject->add(clone $component);
}
} else {
// We need to update an existing object with all the new
// information. We can just remove all existing components
// and create new ones.
foreach ($existingObject->getComponents() as $component) {
$existingObject->remove($component);
}
foreach ($itipMessage->message->getComponents() as $component) {
$existingObject->add(clone $component);
}
}
return $existingObject;
}
/**
* Processes incoming CANCEL messages.
*
* This is a message from an organizer, and means that either an
* attendee got removed from an event, or an event got cancelled
* altogether.
*
* @param Message $itipMessage
* @param VCalendar $existingObject
*
* @return VCalendar|null
*/
protected function processMessageCancel(Message $itipMessage, VCalendar $existingObject = null) {
if (!$existingObject) {
// The event didn't exist in the first place, so we're just
// ignoring this message.
} else {
foreach ($existingObject->VEVENT as $vevent) {
$vevent->STATUS = 'CANCELLED';
$vevent->SEQUENCE = $itipMessage->sequence;
}
}
return $existingObject;
}
/**
* Processes incoming REPLY messages.
*
* The message is a reply. This is for example an attendee telling
* an organizer he accepted the invite, or declined it.
*
* @param Message $itipMessage
* @param VCalendar $existingObject
*
* @return VCalendar|null
*/
protected function processMessageReply(Message $itipMessage, VCalendar $existingObject = null) {
// A reply can only be processed based on an existing object.
// If the object is not available, the reply is ignored.
if (!$existingObject) {
return;
}
$instances = [];
$requestStatus = '2.0';
// Finding all the instances the attendee replied to.
foreach ($itipMessage->message->VEVENT as $vevent) {
$recurId = isset($vevent->{'RECURRENCE-ID'}) ? $vevent->{'RECURRENCE-ID'}->getValue() : 'master';
$attendee = $vevent->ATTENDEE;
$instances[$recurId] = $attendee['PARTSTAT']->getValue();
if (isset($vevent->{'REQUEST-STATUS'})) {
$requestStatus = $vevent->{'REQUEST-STATUS'}->getValue();
list($requestStatus) = explode(';', $requestStatus);
}
}
// Now we need to loop through the original organizer event, to find
// all the instances where we have a reply for.
$masterObject = null;
foreach ($existingObject->VEVENT as $vevent) {
$recurId = isset($vevent->{'RECURRENCE-ID'}) ? $vevent->{'RECURRENCE-ID'}->getValue() : 'master';
if ($recurId === 'master') {
$masterObject = $vevent;
}
if (isset($instances[$recurId])) {
$attendeeFound = false;
if (isset($vevent->ATTENDEE)) {
foreach ($vevent->ATTENDEE as $attendee) {
if ($attendee->getValue() === $itipMessage->sender) {
$attendeeFound = true;
$attendee['PARTSTAT'] = $instances[$recurId];
$attendee['SCHEDULE-STATUS'] = $requestStatus;
// Un-setting the RSVP status, because we now know
// that the attendee already replied.
unset($attendee['RSVP']);
break;
}
}
}
if (!$attendeeFound) {
// Adding a new attendee. The iTip documentation calls this
// a party crasher.
$attendee = $vevent->add('ATTENDEE', $itipMessage->sender, [
'PARTSTAT' => $instances[$recurId]
]);
if ($itipMessage->senderName) $attendee['CN'] = $itipMessage->senderName;
}
unset($instances[$recurId]);
}
}
if (!$masterObject) {
// No master object, we can't add new instances.
return;
}
// If we got replies to instances that did not exist in the
// original list, it means that new exceptions must be created.
foreach ($instances as $recurId => $partstat) {
$recurrenceIterator = new EventIterator($existingObject, $itipMessage->uid);
$found = false;
$iterations = 1000;
do {
$newObject = $recurrenceIterator->getEventObject();
$recurrenceIterator->next();
if (isset($newObject->{'RECURRENCE-ID'}) && $newObject->{'RECURRENCE-ID'}->getValue() === $recurId) {
$found = true;
}
$iterations--;
} while ($recurrenceIterator->valid() && !$found && $iterations);
// Invalid recurrence id. Skipping this object.
if (!$found) continue;
unset(
$newObject->RRULE,
$newObject->EXDATE,
$newObject->RDATE
);
$attendeeFound = false;
if (isset($newObject->ATTENDEE)) {
foreach ($newObject->ATTENDEE as $attendee) {
if ($attendee->getValue() === $itipMessage->sender) {
$attendeeFound = true;
$attendee['PARTSTAT'] = $partstat;
break;
}
}
}
if (!$attendeeFound) {
// Adding a new attendee
$attendee = $newObject->add('ATTENDEE', $itipMessage->sender, [
'PARTSTAT' => $partstat
]);
if ($itipMessage->senderName) {
$attendee['CN'] = $itipMessage->senderName;
}
}
$existingObject->add($newObject);
}
return $existingObject;
}
/**
* This method is used in cases where an event got updated, and we
* potentially need to send emails to attendees to let them know of updates
* in the events.
*
* We will detect which attendees got added, which got removed and create
* specific messages for these situations.
*
* @param VCalendar $calendar
* @param array $eventInfo
* @param array $oldEventInfo
*
* @return array
*/
protected function parseEventForOrganizer(VCalendar $calendar, array $eventInfo, array $oldEventInfo) {
// Merging attendee lists.
$attendees = [];
foreach ($oldEventInfo['attendees'] as $attendee) {
$attendees[$attendee['href']] = [
'href' => $attendee['href'],
'oldInstances' => $attendee['instances'],
'newInstances' => [],
'name' => $attendee['name'],
'forceSend' => null,
];
}
foreach ($eventInfo['attendees'] as $attendee) {
if (isset($attendees[$attendee['href']])) {
$attendees[$attendee['href']]['name'] = $attendee['name'];
$attendees[$attendee['href']]['newInstances'] = $attendee['instances'];
$attendees[$attendee['href']]['forceSend'] = $attendee['forceSend'];
} else {
$attendees[$attendee['href']] = [
'href' => $attendee['href'],
'oldInstances' => [],
'newInstances' => $attendee['instances'],
'name' => $attendee['name'],
'forceSend' => $attendee['forceSend'],
];
}
}
$messages = [];
foreach ($attendees as $attendee) {
// An organizer can also be an attendee. We should not generate any
// messages for those.
if ($attendee['href'] === $eventInfo['organizer']) {
continue;
}
$message = new Message();
$message->uid = $eventInfo['uid'];
$message->component = 'VEVENT';
$message->sequence = $eventInfo['sequence'];
$message->sender = $eventInfo['organizer'];
$message->senderName = $eventInfo['organizerName'];
$message->recipient = $attendee['href'];
$message->recipientName = $attendee['name'];
if (!$attendee['newInstances']) {
// If there are no instances the attendee is a part of, it
// means the attendee was removed and we need to send him a
// CANCEL.
$message->method = 'CANCEL';
// Creating the new iCalendar body.
$icalMsg = new VCalendar();
$icalMsg->METHOD = $message->method;
$event = $icalMsg->add('VEVENT', [
'UID' => $message->uid,
'SEQUENCE' => $message->sequence,
]);
if (isset($calendar->VEVENT->SUMMARY)) {
$event->add('SUMMARY', $calendar->VEVENT->SUMMARY->getValue());
}
$event->add(clone $calendar->VEVENT->DTSTART);
if (isset($calendar->VEVENT->DTEND)) {
$event->add(clone $calendar->VEVENT->DTEND);
} elseif (isset($calendar->VEVENT->DURATION)) {
$event->add(clone $calendar->VEVENT->DURATION);
}
$org = $event->add('ORGANIZER', $eventInfo['organizer']);
if ($eventInfo['organizerName']) $org['CN'] = $eventInfo['organizerName'];
$event->add('ATTENDEE', $attendee['href'], [
'CN' => $attendee['name'],
]);
$message->significantChange = true;
} else {
// The attendee gets the updated event body
$message->method = 'REQUEST';
// Creating the new iCalendar body.
$icalMsg = new VCalendar();
$icalMsg->METHOD = $message->method;
foreach ($calendar->select('VTIMEZONE') as $timezone) {
$icalMsg->add(clone $timezone);
}
// We need to find out that this change is significant. If it's
// not, systems may opt to not send messages.
//
// We do this based on the 'significantChangeHash' which is
// some value that changes if there's a certain set of
// properties changed in the event, or simply if there's a
// difference in instances that the attendee is invited to.
$message->significantChange =
$attendee['forceSend'] === 'REQUEST' ||
array_keys($attendee['oldInstances']) != array_keys($attendee['newInstances']) ||
$oldEventInfo['significantChangeHash'] !== $eventInfo['significantChangeHash'];
foreach ($attendee['newInstances'] as $instanceId => $instanceInfo) {
$currentEvent = clone $eventInfo['instances'][$instanceId];
if ($instanceId === 'master') {
// We need to find a list of events that the attendee
// is not a part of to add to the list of exceptions.
$exceptions = [];
foreach ($eventInfo['instances'] as $instanceId => $vevent) {
if (!isset($attendee['newInstances'][$instanceId])) {
$exceptions[] = $instanceId;
}
}
// If there were exceptions, we need to add it to an
// existing EXDATE property, if it exists.
if ($exceptions) {
if (isset($currentEvent->EXDATE)) {
$currentEvent->EXDATE->setParts(array_merge(
$currentEvent->EXDATE->getParts(),
$exceptions
));
} else {
$currentEvent->EXDATE = $exceptions;
}
}
// Cleaning up any scheduling information that
// shouldn't be sent along.
unset($currentEvent->ORGANIZER['SCHEDULE-FORCE-SEND']);
unset($currentEvent->ORGANIZER['SCHEDULE-STATUS']);
foreach ($currentEvent->ATTENDEE as $attendee) {
unset($attendee['SCHEDULE-FORCE-SEND']);
unset($attendee['SCHEDULE-STATUS']);
// We're adding PARTSTAT=NEEDS-ACTION to ensure that
// iOS shows an "Inbox Item"
if (!isset($attendee['PARTSTAT'])) {
$attendee['PARTSTAT'] = 'NEEDS-ACTION';
}
}
}
$icalMsg->add($currentEvent);
}
}
$message->message = $icalMsg;
$messages[] = $message;
}
return $messages;
}
/**
* Parse an event update for an attendee.
*
* This function figures out if we need to send a reply to an organizer.
*
* @param VCalendar $calendar
* @param array $eventInfo
* @param array $oldEventInfo
* @param string $attendee
*
* @return Message[]
*/
protected function parseEventForAttendee(VCalendar $calendar, array $eventInfo, array $oldEventInfo, $attendee) {
if ($this->scheduleAgentServerRules && $eventInfo['organizerScheduleAgent'] === 'CLIENT') {
return [];
}
// Don't bother generating messages for events that have already been
// cancelled.
if ($eventInfo['status'] === 'CANCELLED') {
return [];
}
$oldInstances = !empty($oldEventInfo['attendees'][$attendee]['instances']) ?
$oldEventInfo['attendees'][$attendee]['instances'] :
[];
$instances = [];
foreach ($oldInstances as $instance) {
$instances[$instance['id']] = [
'id' => $instance['id'],
'oldstatus' => $instance['partstat'],
'newstatus' => null,
];
}
foreach ($eventInfo['attendees'][$attendee]['instances'] as $instance) {
if (isset($instances[$instance['id']])) {
$instances[$instance['id']]['newstatus'] = $instance['partstat'];
} else {
$instances[$instance['id']] = [
'id' => $instance['id'],
'oldstatus' => null,
'newstatus' => $instance['partstat'],
];
}
}
// We need to also look for differences in EXDATE. If there are new
// items in EXDATE, it means that an attendee deleted instances of an
// event, which means we need to send DECLINED specifically for those
// instances.
// We only need to do that though, if the master event is not declined.
if (isset($instances['master']) && $instances['master']['newstatus'] !== 'DECLINED') {
foreach ($eventInfo['exdate'] as $exDate) {
if (!in_array($exDate, $oldEventInfo['exdate'])) {
if (isset($instances[$exDate])) {
$instances[$exDate]['newstatus'] = 'DECLINED';
} else {
$instances[$exDate] = [
'id' => $exDate,
'oldstatus' => null,
'newstatus' => 'DECLINED',
];
}
}
}
}
// Gathering a few extra properties for each instance.
foreach ($instances as $recurId => $instanceInfo) {
if (isset($eventInfo['instances'][$recurId])) {
$instances[$recurId]['dtstart'] = clone $eventInfo['instances'][$recurId]->DTSTART;
} else {
$instances[$recurId]['dtstart'] = $recurId;
}
}
$message = new Message();
$message->uid = $eventInfo['uid'];
$message->method = 'REPLY';
$message->component = 'VEVENT';
$message->sequence = $eventInfo['sequence'];
$message->sender = $attendee;
$message->senderName = $eventInfo['attendees'][$attendee]['name'];
$message->recipient = $eventInfo['organizer'];
$message->recipientName = $eventInfo['organizerName'];
$icalMsg = new VCalendar();
$icalMsg->METHOD = 'REPLY';
$hasReply = false;
foreach ($instances as $instance) {
if ($instance['oldstatus'] == $instance['newstatus'] && $eventInfo['organizerForceSend'] !== 'REPLY') {
// Skip
continue;
}
$event = $icalMsg->add('VEVENT', [
'UID' => $message->uid,
'SEQUENCE' => $message->sequence,
]);
$summary = isset($calendar->VEVENT->SUMMARY) ? $calendar->VEVENT->SUMMARY->getValue() : '';
// Adding properties from the correct source instance
if (isset($eventInfo['instances'][$instance['id']])) {
$instanceObj = $eventInfo['instances'][$instance['id']];
$event->add(clone $instanceObj->DTSTART);
if (isset($instanceObj->DTEND)) {
$event->add(clone $instanceObj->DTEND);
} elseif (isset($instanceObj->DURATION)) {
$event->add(clone $instanceObj->DURATION);
}
if (isset($instanceObj->SUMMARY)) {
$event->add('SUMMARY', $instanceObj->SUMMARY->getValue());
} elseif ($summary) {
$event->add('SUMMARY', $summary);
}
} else {
// This branch of the code is reached, when a reply is
// generated for an instance of a recurring event, through the
// fact that the instance has disappeared by showing up in
// EXDATE
$dt = DateTimeParser::parse($instance['id'], $eventInfo['timezone']);
// Treat is as a DATE field
if (strlen($instance['id']) <= 8) {
$event->add('DTSTART', $dt, ['VALUE' => 'DATE']);
} else {
$event->add('DTSTART', $dt);
}
if ($summary) {
$event->add('SUMMARY', $summary);
}
}
if ($instance['id'] !== 'master') {
$dt = DateTimeParser::parse($instance['id'], $eventInfo['timezone']);
// Treat is as a DATE field
if (strlen($instance['id']) <= 8) {
$event->add('RECURRENCE-ID', $dt, ['VALUE' => 'DATE']);
} else {
$event->add('RECURRENCE-ID', $dt);
}
}
$organizer = $event->add('ORGANIZER', $message->recipient);
if ($message->recipientName) {
$organizer['CN'] = $message->recipientName;
}
$attendee = $event->add('ATTENDEE', $message->sender, [
'PARTSTAT' => $instance['newstatus']
]);
if ($message->senderName) {
$attendee['CN'] = $message->senderName;
}
$hasReply = true;
}
if ($hasReply) {
$message->message = $icalMsg;
return [$message];
} else {
return [];
}
}
/**
* Returns attendee information and information about instances of an
* event.
*
* Returns an array with the following keys:
*
* 1. uid
* 2. organizer
* 3. organizerName
* 4. organizerScheduleAgent
* 5. organizerForceSend
* 6. instances
* 7. attendees
* 8. sequence
* 9. exdate
* 10. timezone - strictly the timezone on which the recurrence rule is
* based on.
* 11. significantChangeHash
* 12. status
* @param VCalendar $calendar
*
* @return array
*/
protected function parseEventInfo(VCalendar $calendar = null) {
$uid = null;
$organizer = null;
$organizerName = null;
$organizerForceSend = null;
$sequence = null;
$timezone = null;
$status = null;
$organizerScheduleAgent = 'SERVER';
$significantChangeHash = '';
// Now we need to collect a list of attendees, and which instances they
// are a part of.
$attendees = [];
$instances = [];
$exdate = [];
foreach ($calendar->VEVENT as $vevent) {
if (is_null($uid)) {
$uid = $vevent->UID->getValue();
} else {
if ($uid !== $vevent->UID->getValue()) {
throw new ITipException('If a calendar contained more than one event, they must have the same UID.');
}
}
if (!isset($vevent->DTSTART)) {
throw new ITipException('An event MUST have a DTSTART property.');
}
if (isset($vevent->ORGANIZER)) {
if (is_null($organizer)) {
$organizer = $vevent->ORGANIZER->getNormalizedValue();
$organizerName = isset($vevent->ORGANIZER['CN']) ? $vevent->ORGANIZER['CN'] : null;
} else {
if ($organizer !== $vevent->ORGANIZER->getNormalizedValue()) {
throw new SameOrganizerForAllComponentsException('Every instance of the event must have the same organizer.');
}
}
$organizerForceSend =
isset($vevent->ORGANIZER['SCHEDULE-FORCE-SEND']) ?
strtoupper($vevent->ORGANIZER['SCHEDULE-FORCE-SEND']) :
null;
$organizerScheduleAgent =
isset($vevent->ORGANIZER['SCHEDULE-AGENT']) ?
strtoupper((string)$vevent->ORGANIZER['SCHEDULE-AGENT']) :
'SERVER';
}
if (is_null($sequence) && isset($vevent->SEQUENCE)) {
$sequence = $vevent->SEQUENCE->getValue();
}
if (isset($vevent->EXDATE)) {
foreach ($vevent->select('EXDATE') as $val) {
$exdate = array_merge($exdate, $val->getParts());
}
sort($exdate);
}
if (isset($vevent->STATUS)) {
$status = strtoupper($vevent->STATUS->getValue());
}
$recurId = isset($vevent->{'RECURRENCE-ID'}) ? $vevent->{'RECURRENCE-ID'}->getValue() : 'master';
if (is_null($timezone)) {
if ($recurId === 'master') {
$timezone = $vevent->DTSTART->getDateTime()->getTimeZone();
} else {
$timezone = $vevent->{'RECURRENCE-ID'}->getDateTime()->getTimeZone();
}
}
if (isset($vevent->ATTENDEE)) {
foreach ($vevent->ATTENDEE as $attendee) {
if ($this->scheduleAgentServerRules &&
isset($attendee['SCHEDULE-AGENT']) &&
strtoupper($attendee['SCHEDULE-AGENT']->getValue()) === 'CLIENT'
) {
continue;
}
$partStat =
isset($attendee['PARTSTAT']) ?
strtoupper($attendee['PARTSTAT']) :
'NEEDS-ACTION';
$forceSend =
isset($attendee['SCHEDULE-FORCE-SEND']) ?
strtoupper($attendee['SCHEDULE-FORCE-SEND']) :
null;
if (isset($attendees[$attendee->getNormalizedValue()])) {
$attendees[$attendee->getNormalizedValue()]['instances'][$recurId] = [
'id' => $recurId,
'partstat' => $partStat,
'force-send' => $forceSend,
];
} else {
$attendees[$attendee->getNormalizedValue()] = [
'href' => $attendee->getNormalizedValue(),
'instances' => [
$recurId => [
'id' => $recurId,
'partstat' => $partStat,
],
],
'name' => isset($attendee['CN']) ? (string)$attendee['CN'] : null,
'forceSend' => $forceSend,
];
}
}
$instances[$recurId] = $vevent;
}
foreach ($this->significantChangeProperties as $prop) {
if (isset($vevent->$prop)) {
$propertyValues = $vevent->select($prop);
$significantChangeHash .= $prop . ':';
if ($prop === 'EXDATE') {
$significantChangeHash .= implode(',', $exdate) . ';';
} else {
foreach ($propertyValues as $val) {
$significantChangeHash .= $val->getValue() . ';';
}
}
}
}
}
$significantChangeHash = md5($significantChangeHash);
return compact(
'uid',
'organizer',
'organizerName',
'organizerScheduleAgent',
'organizerForceSend',
'instances',
'attendees',
'sequence',
'exdate',
'timezone',
'significantChangeHash',
'status'
);
}
}
