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diff --git a/lib/Kolab/CalDAV/CalendarBackend.php b/lib/Kolab/CalDAV/CalendarBackend.php
index 1d002df..3dd5016 100644
--- a/lib/Kolab/CalDAV/CalendarBackend.php
+++ b/lib/Kolab/CalDAV/CalendarBackend.php
@@ -1,882 +1,884 @@
<?php
/**
* SabreDAV Calendaring backend for Kolab.
*
* @author Thomas Bruederli <bruederli@kolabsys.com>
*
* Copyright (C) 2013, Kolab Systems AG <contact@kolabsys.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
namespace Kolab\CalDAV;
use \PEAR;
use \rcube;
use \rcube_charset;
use \kolab_storage;
use \libcalendaring;
use Sabre\CalDAV;
use Sabre\VObject;
/**
* Kolab Calendaring backend.
*
* Checkout the Sabre\CalDAV\Backend\BackendInterface for all the methods that must be implemented.
*
*/
class CalendarBackend extends CalDAV\Backend\AbstractBackend
{
private $calendars;
private $folders;
/**
* Read available calendar folders from server
*/
private function _read_calendars()
{
// already read sources
if (isset($this->calendars))
return $this->calendars;
// get all folders that have "event" type
$folders = kolab_storage::get_folders('event');
$this->calendars = $this->folders = array();
// convert to UTF8 and sort
$names = array();
foreach ($folders as $folder) {
$folders[$folder->name] = $folder;
$names[$folder->name] = rcube_charset::convert($folder->name, 'UTF7-IMAP');
}
asort($names, SORT_LOCALE_STRING);
foreach ($names as $utf7name => $name) {
$id = urlencode($utf7name);
$folder = $this->folders[$id] = $folders[$utf7name];
$fdata = $folder->get_imap_data(); // fetch IMAP folder data for CTag generation
$this->calendars[$id] = array(
'id' => $id,
'uri' => $id,
'{DAV:}displayname' => $name,
'{http://apple.com/ns/ical/}calendar-color' => $this->get_color($folders[$utf7name]),
'{http://calendarserver.org/ns/}getctag' => sprintf('%d-%d-%d', $fdata['UIDVALIDITY'], $fdata['HIGHESTMODSEQ'], $fdata['UIDNEXT']),
'{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new CalDAV\Property\SupportedCalendarComponentSet(array('VEVENT')),
'{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp' => new CalDAV\Property\ScheduleCalendarTransp('opaque'),
);
}
return $this->calendars;
}
/**
* Getter for a kolab_storage_folder representing the calendar for the given ID
*
* @param string Calendar ID
* @return object kolab_storage_folder instance
*/
public function get_storage_folder($id)
{
if ($this->folders[$id]) {
return $this->folders[$id];
}
else {
$storage = kolab_storage::get_folder(urldecode($id));
return !PEAR::isError($this->storage) ? $storage : null;
}
}
/**
* Helper method to extract calendar color from metadata
*/
private function get_color($folder)
{
// color is defined in folder METADATA
$metadata = $folder->get_metadata(array(kolab_storage::COLOR_KEY_PRIVATE, kolab_storage::COLOR_KEY_SHARED));
if (($color = $metadata[kolab_storage::COLOR_KEY_PRIVATE]) || ($color = $metadata[kolab_storage::COLOR_KEY_SHARED])) {
return $color;
}
return '';
}
/**
* Returns a list of calendars for a principal.
*
* Every calendars is an array with the following keys:
* * id, a unique id that will be used by other functions to modify the
* calendar. This can be the same as the uri or a database key.
* * uri, which the basename of the uri with which the calendar is
* accessed.
* * principaluri. The owner of the calendar. Almost always the same as
* principalUri passed to this method.
*
* Furthermore it can contain webdav properties in clark notation. A very
* common one is '{DAV:}displayname'.
*
* @param string $principalUri
* @return array
*/
public function getCalendarsForUser($principalUri)
{
$this->_read_calendars();
$calendars = array();
foreach ($this->calendars as $id => $cal) {
$cal['principaluri'] = $principalUri;
$calendars[] = $cal;
}
return $calendars;
}
/**
* Creates a new calendar for a principal.
*
* If the creation was a success, an id must be returned that can be used to reference
* this calendar in other methods, such as updateCalendar.
*
* @param string $principalUri
* @param string $calendarUri
* @param array $properties
* @return void
*/
public function createCalendar($principalUri,$calendarUri,array $properties)
{
// TODO: implement this
}
/**
* Updates properties for a calendar.
*
* The mutations array uses the propertyName in clark-notation as key,
* and the array value for the property value. In the case a property
* should be deleted, the property value will be null.
*
* This method must be atomic. If one property cannot be changed, the
* entire operation must fail.
*
* If the operation was successful, true can be returned.
* If the operation failed, false can be returned.
*
* Deletion of a non-existent property is always successful.
*
* Lastly, it is optional to return detailed information about any
* failures. In this case an array should be returned with the following
* structure:
*
* array(
* 403 => array(
* '{DAV:}displayname' => null,
* ),
* 424 => array(
* '{DAV:}owner' => null,
* )
* )
*
* In this example it was forbidden to update {DAV:}displayname.
* (403 Forbidden), which in turn also caused {DAV:}owner to fail
* (424 Failed Dependency) because the request needs to be atomic.
*
* @param mixed $calendarId
* @param array $mutations
* @return bool|array
*/
public function updateCalendar($calendarId, array $mutations)
{
// TODO: implement this
return false;
}
/**
* Delete a calendar and all it's objects
*
* @param mixed $calendarId
* @return void
*/
public function deleteCalendar($calendarId)
{
// TODO: implement this
}
/**
* Returns all calendar objects within a calendar.
*
* Every item contains an array with the following keys:
* * id - unique identifier which will be used for subsequent updates
* * calendardata - The iCalendar-compatible calendar data (optional)
* * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
* * lastmodified - a timestamp of the last modification time
* * etag - An arbitrary string, surrounded by double-quotes. (e.g.: "abcdef"')
* * calendarid - The calendarid as it was passed to this function.
* * size - The size of the calendar objects, in bytes.
*
* Note that the etag is optional, but it's highly encouraged to return for
* speed reasons.
*
* If neither etag or size are specified, the calendardata will be
* used/fetched to determine these numbers. If both are specified the
* amount of times this is needed is reduced by a great degree.
*
* @param mixed $calendarId
* @return array
*/
public function getCalendarObjects($calendarId)
{
console(__METHOD__, $calendarId);
$query = array();
$events = array();
$storage = $this->get_storage_folder($calendarId);
if ($storage) {
foreach ((array)$storage->select($query) as $event) {
$events[] = array(
'id' => $event['uid'],
'uri' => $event['uid'] . '.ics',
'lastmodified' => $event['changed']->format('U'),
'calendarid' => $calendarId,
'etag' => self::_get_etag($event),
'size' => $event['_size'],
);
}
}
return $events;
}
/**
* Returns information from a single calendar object, based on it's object
* uri.
*
* The returned array must have the same keys as getCalendarObjects. The
* 'calendardata' object is required here though, while it's not required
* for getCalendarObjects.
*
* @param mixed $calendarId
* @param string $objectUri
* @return array
*/
public function getCalendarObject($calendarId, $objectUri)
{
console(__METHOD__, $calendarId, $objectUri);
$uid = basename($objectUri, '.ics');
$storage = $this->get_storage_folder($calendarId);
if ($storage && ($event = $storage->get_object($uid))) {
console('FOUND: ' . $event['uid']);
return array(
'id' => $event['uid'],
'uri' => $event['uid'] . '.ics',
'lastmodified' => $event['changed']->format('U'),
'calendarid' => $calendarId,
'calendardata' => $this->_to_ical($event),
'etag' => self::_get_etag($event),
);
}
return array();
}
/**
* Creates a new calendar object.
*
* It is possible return an etag from this function, which will be used in
* the response to this PUT request. Note that the ETag must be surrounded
* by double-quotes.
*
* However, you should only really return this ETag if you don't mangle the
* calendar-data. If the result of a subsequent GET to this object is not
* the exact same as this request body, you should omit the ETag.
*
* @param mixed $calendarId
* @param string $objectUri
* @param string $calendarData
* @return string|null
*/
public function createCalendarObject($calendarId, $objectUri, $calendarData)
{
console(__METHOD__, $calendarId, $objectUri, $calendarData);
$uid = basename($objectUri, '.ics');
$storage = $this->get_storage_folder($calendarId);
$object = $this->parse_calendar_data($calendarData, $uid);
if ($object['uid'] == $uid) {
$success = $storage->save($object, 'event');
if (!$success) {
rcube::raise_error(array(
'code' => 600, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Error saving event object to Kolab server"),
true, false);
}
}
else {
rcube::raise_error(array(
'code' => 600, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Error creating calendar object: UID doesn't match object URI"),
true, false);
}
// return new Etag
return $success ? self::_get_etag($object) : null;
}
/**
* Updates an existing calendarobject, based on it's uri.
*
* It is possible return an etag from this function, which will be used in
* the response to this PUT request. Note that the ETag must be surrounded
* by double-quotes.
*
* However, you should only really return this ETag if you don't mangle the
* calendar-data. If the result of a subsequent GET to this object is not
* the exact same as this request body, you should omit the ETag.
*
* @param mixed $calendarId
* @param string $objectUri
* @param string $calendarData
* @return string|null
*/
public function updateCalendarObject($calendarId, $objectUri, $calendarData)
{
console(__METHOD__, $calendarId, $objectUri, $calendarData);
$uid = basename($objectUri, '.ics');
$storage = $this->get_storage_folder($calendarId);
$object = $this->parse_calendar_data($calendarData, $uid);
// sanity check
if ($object['uid'] != $uid) {
rcube::raise_error(array(
'code' => 600, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Error creating calendar object: UID doesn't match object URI"),
true, false);
return null;
}
// copy meta data (starting with _) from old object
$old = $storage->get_object($uid);
foreach ((array)$old as $key => $val) {
if (!isset($object[$key]) && $key[0] == '_')
$object[$key] = $val;
}
// save object
$saved = $storage->save($object, 'event', $uid);
if (!$saved) {
rcube::raise_error(array(
'code' => 600, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Error saving event object to Kolab server"),
true, false);
return null;
}
// return new Etag
return self::_get_etag($object);
}
/**
* Deletes an existing calendar object.
*
* @param mixed $calendarId
* @param string $objectUri
* @return void
*/
public function deleteCalendarObject($calendarId, $objectUri)
{
console(__METHOD__, $calendarId, $objectUri);
$uid = basename($objectUri, '.ics');
if ($storage = $this->get_storage_folder($calendarId)) {
$storage->delete($uid);
}
}
/**
* Performs a calendar-query on the contents of this calendar.
*
* The calendar-query is defined in RFC4791 : CalDAV. Using the
* calendar-query it is possible for a client to request a specific set of
* object, based on contents of iCalendar properties, date-ranges and
* iCalendar component types (VTODO, VEVENT).
*
* This method should just return a list of (relative) urls that match this
* query.
*
* The list of filters are specified as an array. The exact array is
* documented by Sabre\CalDAV\CalendarQueryParser.
*
* Note that it is extremely likely that getCalendarObject for every path
* returned from this method will be called almost immediately after. You
* may want to anticipate this to speed up these requests.
*
* Requests that are extremely common are:
* * requests for just VEVENTS
* * requests for just VTODO
* * requests with a time-range-filter on either VEVENT or VTODO.
*
* ..and combinations of these requests. It may not be worth it to try to
* handle every possible situation and just rely on the (relatively
* easy to use) CalendarQueryValidator to handle the rest.
*
* Note that especially time-range-filters may be difficult to parse. A
* time-range filter specified on a VEVENT must for instance also handle
* recurrence rules correctly.
* A good example of how to interprete all these filters can also simply
* be found in Sabre\CalDAV\CalendarQueryFilter. This class is as correct
* as possible, so it gives you a good idea on what type of stuff you need
* to think of.
*
* @param mixed $calendarId
* @param array $filters
* @return array
*/
public function calendarQuery($calendarId, array $filters)
{
console(__METHOD__, $calendarId);
// TODO: build kolab storage query from $filters
$query = array();
$results = array();
if ($storage = $this->get_storage_folder($calendarId)) {
foreach ((array)$storage->select($query) as $event) {
// TODO: cache the already fetched events in memory (really?)
$results[] = $event['uid'] . '.ics';
}
}
return $results;
}
/********** Data conversion utilities ***********/
private $attendee_keymap = array('name' => 'CN', 'status' => 'PARTSTAT', 'role' => 'ROLE', 'rsvp' => 'RSVP');
/**
* Parse the given iCal string into a hash array kolab_format_event can handle
*
* @param string iCal data block
* @return array Hash array with event properties or null on failure
*/
private function parse_calendar_data($calendarData, $uid)
{
try {
// use already parsed object
if (Plugin::$parsed_vevent && Plugin::$parsed_vevent->UID == $uid) {
$vobject = Plugin::$parsed_vcalendar;
$vevent = Plugin::$parsed_vevent;
}
else {
$vobject = VObject\Reader::read($calendarData, VObject\Reader::OPTION_FORGIVING | VObject\Reader::OPTION_IGNORE_INVALID_LINES);
if ($vobject->name == 'VCALENDAR') {
foreach ($vobject->getBaseComponents('VEVENT') as $ve) {
$vevent = $ve;
break;
}
}
}
// convert the VEvent object into a hash array
if ($vevent && $vevent->name == 'VEVENT') {
$object = $this->_to_array($vevent);
if (!empty($object['uid'])) {
// parse recurrence exceptions
if ($object['recurrence']) {
foreach ($vobject->children as $i => $component) {
if ($component->name == 'VEVENT' && isset($component->{'RECURRENCE-ID'})) {
$object['recurrence']['EXCEPTIONS'][] = $this->_to_array($component);
}
}
}
return $object;
}
}
}
catch (VObject\ParseException $e) {
rcube::raise_error(array(
'code' => 600, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "iCal data parse error: " . $e->getMessage()),
true, false);
}
return null;
}
/**
* Convert the given Sabre\VObject\Component\Vevent object to a libkolab compatible event format
*
* @param object Vevent object to convert
* @return array Hash array with event properties
* @TODO: move this to libcalendaring for common use
*/
private function _to_array($ve)
{
$event = array(
'uid' => strval($ve->UID),
'title' => strval($ve->SUMMARY),
'changed' => $ve->DTSTAMP->getDateTime(),
'start' => self::_convert_datetime($ve->DTSTART),
'end' => self::_convert_datetime($ve->DTEND),
// set defaults
'free_busy' => 'busy',
'priority' => 0,
'attendees' => array(),
);
// check for all-day dates
if ($event['start']->_dateonly) {
$event['allday'] = true;
}
if ($event['allday'] && is_object($event['end'])) {
$event['end']->sub(new \DateInterval('PT23H'));
}
// map other attributes to internal fields
$_attendees = array();
foreach ($ve->children as $prop) {
if (!($prop instanceof VObject\Property))
continue;
switch ($prop->name) {
case 'TRANSP':
$event['free_busy'] = $prop->value == 'TRANSPARENT' ? 'free' : 'busy';
break;
case 'STATUS':
if ($prop->value == 'TENTATIVE')
$event['free_busy'] = 'tentative';
else if ($prop->value == 'cancelled')
$event['cancelled'] = true;
break;
case 'PRIORITY':
if (is_numeric($prop->value))
$event['priority'] = $prop->value;
break;
case 'RRULE':
$params = array();
// parse recurrence rule attributes
foreach (explode(';', $prop->value) as $par) {
list($k, $v) = explode('=', $par);
$params[$k] = $v;
}
if ($params['UNTIL'])
$params['UNTIL'] = date_create($params['UNTIL']);
if (!$params['INTERVAL'])
$params['INTERVAL'] = 1;
$event['recurrence'] = $params;
break;
case 'EXDATE':
$event['recurrence']['EXDATE'] = array_merge((array)$event['recurrence']['EXDATE'], (array)self::_convert_datetime($prop));
break;
case 'RECURRENCE-ID':
// $event['recurrence_id'] = self::_convert_datetime($prop);
break;
case 'SEQUENCE':
$event['sequence'] = intval($prop->value);
break;
case 'DESCRIPTION':
case 'LOCATION':
$event[strtolower($prop->name)] = $prop->value;
break;
case 'CATEGORY':
case 'CATEGORIES':
$event['categories'] = $prop->getParts();
break;
case 'CLASS':
case 'X-CALENDARSERVER-ACCESS':
- $sensitivity_map = array('PUBLIC' => 0, 'PRIVATE' => 1, 'CONFIDENTIAL' => 2);
- $event['sensitivity'] = $sensitivity_map[$prop->value];
+ $event['sensitivity'] = strtolower($prop->value);
break;
case 'X-MICROSOFT-CDO-BUSYSTATUS':
if ($prop->value == 'OOF')
$event['free_busy'] == 'outofoffice';
else if (in_array($prop->value, array('FREE', 'BUSY', 'TENTATIVE')))
$event['free_busy'] = strtolower($prop->value);
break;
case 'ATTENDEE':
case 'ORGANIZER':
$params = array();
foreach ($prop->parameters as $param) {
switch ($param->name) {
case 'RSVP': $params[$param->name] = strtolower($param->value) == 'true'; break;
default: $params[$param->name] = $param->value; break;
}
}
$attendee = self::_map_keys($params, array_flip($this->attendee_keymap));
$attendee['email'] = preg_replace('/^mailto:/i', '', $prop->value);
if ($prop->name == 'ORGANIZER') {
$attendee['status'] = 'ACCEPTED';
$event['organizer'] = $attendee;
}
else {
$event['attendees'][] = $attendee;
}
break;
case 'ATTACH':
if (substr($prop->value, 0, 4) == 'http') {
$event['links'][] = $prop->value;
}
break;
default:
if (substr($prop->name, 0, 2) == 'X-')
$event['x-custom'][] = array($prop->name, strval($prop->value));
break;
}
}
// find alarms
if ($valarms = $ve->select('VALARM')) {
$action = 'DISPLAY';
$trigger = null;
$valarm = reset($valarms);
foreach ($valarm->children as $prop) {
switch ($prop->name) {
case 'TRIGGER':
foreach ($prop->parameters as $param) {
if ($param->name == 'VALUE' && $param->value == 'DATE-TIME') {
$trigger = '@' . $prop->getDateTime()->format('U');
}
}
if (!$trigger) {
$trigger = preg_replace('/PT/', '', $prop->value);
}
break;
case 'ACTION':
$action = $prop->value;
break;
}
}
if ($trigger)
$event['alarms'] = $trigger . ':' . $action;
}
return $event;
}
/**
* Helper method to correctly interpret an all-day date value
*/
private static function _convert_datetime($prop)
{
if (empty($prop)) {
return null;
}
else if ($prop instanceof VObject\Property\MultiDateTime) {
$dt = array();
$dateonly = ($prop->getDateType() & VObject\Property\DateTime::DATE);
foreach ($prop->getDateTimes() as $item) {
$item->_dateonly = $dateonly;
$dt[] = $item;
}
}
else if ($prop instanceof VObject\Property\DateTime) {
$dt = $prop->getDateTime();
if ($prop->getDateType() & VObject\Property\DateTime::DATE) {
$dt->_dateonly = true;
}
}
else if ($prop instanceof \DateTime) {
$dt = $prop;
}
return $dt;
}
/**
* Build a valid iCal format block from the given event
*
* @param array Hash array with event properties from libkolab
* @param object RECURRENCE-ID property when serializing a recurrence exception
* @return mixed VCALENDAR string containing the VEVENT data
* or VObject\VEvent object with a recurrence exception instance
* @TODO: move this to libcalendaring for common use
*/
private function _to_ical($event, $recurrence_id = null)
{
$ve = VObject\Component::create('VEVENT');
$ve->add('UID', $event['uid']);
$ve->add(self::_datetime_prop('DTSTAMP', $event['changed'], true));
$ve->add(self::_datetime_prop('DTSTART', $event['start'], false));
$ve->add(self::_datetime_prop('DTEND', $event['end'], false));
$ve->add('SUMMARY', $event['title']);
if ($recurrence_id)
$ve->add($recurrence_id);
if ($event['location'])
$ve->add('LOCATION', $event['location']);
if ($event['description'])
$ve->add('DESCRIPTION', $event['description']);
if ($event['sequence'])
$ve->add('SEQUENCE', $event['sequence']);
if ($event['recurrence']) {
if ($exdates = $event['recurrence']['EXDATE']) {
unset($event['recurrence']['EXDATE']); // don't serialize EXDATEs into RRULE value
}
$ve->add('RRULE', libcalendaring::to_rrule($event['recurrence']));
// add EXDATEs esch one per line (for Thunderbird Lightning)
if ($exdates) {
foreach ($exdates as $ex) {
if ($ex instanceof \DateTime) {
$exd = clone $event['start'];
$exd->setDate($ex->format('Y'), $ex->format('n'), $ex->format('j'));
$exd->setTimeZone(new \DateTimeZone('UTC'));
$ve->add(new VObject\Property('EXDATE', $exd->format('Ymd\\THis\\Z')));
}
}
}
}
if ($event['categories']) {
$cat = VObject\Property::create('CATEGORIES');
$cat->setParts((array)$event['categories']);
$ve->add($cat);
}
$ve->add('TRANSP', $event['free_busy'] == 'free' ? 'TRANSPARENT' : 'OPAQUE');
if ($event['priority'])
$ve->add('PRIORITY', $event['priority']);
if ($event['cancelled'])
$ve->add('STATUS', 'CANCELLED');
else if ($event['free_busy'] == 'tentative')
$ve->add('STATUS', 'TENTATIVE');
+ if (!empty($event['sensitivity']))
+ $ve->add('CLASS', strtoupper($event['sensitivity']));
+
if ($event['alarms']) {
$va = VObject\Component::create('VALARM');
list($trigger, $va->action) = explode(':', $event['alarms']);
$val = libcalendaring::parse_alaram_value($trigger);
if ($val[1]) $va->add('TRIGGER', preg_replace('/^([-+])(.+)/', '\\1PT\\2', $trigger));
else $va->add('TRIGGER', gmdate('Ymd\THis\Z', $val[0]), array('VALUE' => 'DATE-TIME'));
$ve->add($va);
}
if ($event['organizer']) {
unset($event['organizer']['rsvp']);
$ve->add('ORGANIZER', 'mailto:' . $event['organizer']['email'], self::_map_keys($event['organizer'], $this->attendee_keymap));
}
foreach ((array)$event['attendees'] as $attendee) {
$attendee['rsvp'] = $attendee['rsvp'] ? 'TRUE' : null;
$ve->add('ATTENDEE', 'mailto:' . $attendee['email'], self::_map_keys($attendee, $this->attendee_keymap));
}
foreach ((array)$event['links'] as $uri) {
$ve->add('ATTACH', $uri);
}
// add custom properties
foreach ((array)$event['x-custom'] as $prop) {
$ve->add($prop[0], $prop[1]);
}
// we're dealing with a recurrence exception here, so no final serialization is desired
if ($recurrence_id)
return $ve;
// encapsulate in VCALENDAR container
$vcal = VObject\Component::create('VCALENDAR');
$vcal->version = '2.0';
$vcal->prodid = '-//Kolab DAV Server ' .KOLAB_DAV_VERSION . '//Sabre//Sabre VObject ' . CalDAV\Version::VERSION . '//EN';
$vcal->calscale = 'GREGORIAN';
$vcal->add($ve);
// append recurrence exceptions
if ($event['recurrence']['EXCEPTIONS']) {
foreach ($event['recurrence']['EXCEPTIONS'] as $ex) {
$vcal->add($this->_to_ical($ex, VObject\Property::create('RECURRENCE-ID', $ex['start'])));
}
}
return $vcal->serialize();
}
/**
* Create a Sabre\VObject\Property instance from a PHP DateTime object
*
* @param string Property name
* @param object DateTime
*/
private static function _datetime_prop($name, $dt, $utc = false)
{
$vdt = new VObject\Property\DateTime($name);
$vdt->setDateTime($dt, $dt->_dateonly ? VObject\Property\DateTime::DATE : ($utc ? VObject\Property\DateTime::UTC : VObject\Property\DateTime::LOCALTZ));
return $vdt;
}
/**
* Copy values from one hash array to another using a key-map
*/
private static function _map_keys($values, $map)
{
$out = array();
foreach ($map as $from => $to) {
if (isset($values[$from]))
$out[$to] = $values[$from];
}
return $out;
}
/**
* Generate an Etag string from the given event data
*
* @param array Hash array with event properties from libkolab
* @return string Etag string
*/
private static function _get_etag($event)
{
return sprintf('"%s-%d"', substr(md5($event['uid']), 0, 16), $event['_msguid']);
}
}

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