friendica-addons/dav/sabre-vobject/lib/Sabre/VObject/Component/VTodo.php

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<?php
namespace Sabre\VObject\Component;
use Sabre\VObject;
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/**
* VTodo component
*
* This component contains some additional functionality specific for VTODOs.
*
* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
* @author Evert Pot (http://www.rooftopsolutions.nl/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class VTodo extends VObject\Component {
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/**
* Returns true or false depending on if the event falls in the specified
* time-range. This is used for filtering purposes.
*
* The rules used to determine if an event falls within the specified
* time-range is based on the CalDAV specification.
*
* @param DateTime $start
* @param DateTime $end
* @return bool
*/
public function isInTimeRange(\DateTime $start, \DateTime $end) {
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$dtstart = isset($this->DTSTART)?$this->DTSTART->getDateTime():null;
$duration = isset($this->DURATION)?VObject\DateTimeParser::parseDuration($this->DURATION):null;
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$due = isset($this->DUE)?$this->DUE->getDateTime():null;
$completed = isset($this->COMPLETED)?$this->COMPLETED->getDateTime():null;
$created = isset($this->CREATED)?$this->CREATED->getDateTime():null;
if ($dtstart) {
if ($duration) {
$effectiveEnd = clone $dtstart;
$effectiveEnd->add($duration);
return $start <= $effectiveEnd && $end > $dtstart;
} elseif ($due) {
return
($start < $due || $start <= $dtstart) &&
($end > $dtstart || $end >= $due);
} else {
return $start <= $dtstart && $end > $dtstart;
}
}
if ($due) {
return ($start < $due && $end >= $due);
}
if ($completed && $created) {
return
($start <= $created || $start <= $completed) &&
($end >= $created || $end >= $completed);
}
if ($completed) {
return ($start <= $completed && $end >= $completed);
}
if ($created) {
return ($end > $created);
}
return true;
}
}