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https://git.friendi.ca/friendica/friendica-addons.git
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133 lines
3.8 KiB
PHP
133 lines
3.8 KiB
PHP
<?php
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/**
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* The VCalendar component
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*
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* This component adds functionality to a component, specific for a VCALENDAR.
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*
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* @package Sabre
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* @subpackage VObject
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* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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class Sabre_VObject_Component_VCalendar extends Sabre_VObject_Component {
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/**
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* Returns a list of all 'base components'. For instance, if an Event has
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* a recurrence rule, and one instance is overridden, the overridden event
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* will have the same UID, but will be excluded from this list.
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*
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* VTIMEZONE components will always be excluded.
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*
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* @param string $componentName filter by component name
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* @return array
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*/
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public function getBaseComponents($componentName = null) {
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$components = array();
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foreach($this->children as $component) {
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if (!$component instanceof Sabre_VObject_Component)
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continue;
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if (isset($component->{'RECURRENCE-ID'}))
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continue;
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if ($componentName && $component->name !== strtoupper($componentName))
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continue;
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if ($component->name === 'VTIMEZONE')
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continue;
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$components[] = $component;
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}
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return $components;
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}
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/**
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* If this calendar object, has events with recurrence rules, this method
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* can be used to expand the event into multiple sub-events.
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*
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* Each event will be stripped from it's recurrence information, and only
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* the instances of the event in the specified timerange will be left
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* alone.
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*
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* In addition, this method will cause timezone information to be stripped,
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* and normalized to UTC.
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*
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* This method will alter the VCalendar. This cannot be reversed.
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*
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* This functionality is specifically used by the CalDAV standard. It is
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* possible for clients to request expand events, if they are rather simple
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* clients and do not have the possibility to calculate recurrences.
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*
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* @param DateTime $start
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* @param DateTime $end
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* @return void
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*/
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public function expand(DateTime $start, DateTime $end) {
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$newEvents = array();
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foreach($this->select('VEVENT') as $key=>$vevent) {
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if (isset($vevent->{'RECURRENCE-ID'})) {
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unset($this->children[$key]);
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continue;
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}
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if (!$vevent->rrule) {
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unset($this->children[$key]);
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if ($vevent->isInTimeRange($start, $end)) {
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$newEvents[] = $vevent;
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}
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continue;
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}
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$uid = (string)$vevent->uid;
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if (!$uid) {
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throw new LogicException('Event did not have a UID!');
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}
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$it = new Sabre_VObject_RecurrenceIterator($this, $vevent->uid);
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$it->fastForward($start);
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while($it->valid() && $it->getDTStart() < $end) {
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if ($it->getDTEnd() > $start) {
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$newEvents[] = $it->getEventObject();
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}
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$it->next();
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}
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unset($this->children[$key]);
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}
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foreach($newEvents as $newEvent) {
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foreach($newEvent->children as $child) {
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if ($child instanceof Sabre_VObject_Property_DateTime &&
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$child->getDateType() == Sabre_VObject_Property_DateTime::LOCALTZ) {
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$child->setDateTime($child->getDateTime(),Sabre_VObject_Property_DateTime::UTC);
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}
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}
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$this->add($newEvent);
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}
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// Removing all VTIMEZONE components
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unset($this->VTIMEZONE);
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}
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}
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