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<?php
/**
* VAlarm component
*
* This component contains some additional functionality specific for VALARMs.
*
* @package Sabre
* @subpackage VObject
* @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 Sabre_VObject_Component_VAlarm extends Sabre_VObject_Component {
/**
* Returns a DateTime object when this alarm is going to trigger.
*
* This ignores repeated alarm, only the first trigger is returned.
*
* @return DateTime
*/
public function getEffectiveTriggerTime() {
$trigger = $this->TRIGGER;
if(!isset($trigger['VALUE']) || strtoupper($trigger['VALUE']) === 'DURATION') {
$triggerDuration = Sabre_VObject_DateTimeParser::parseDuration($this->TRIGGER);
$related = (isset($trigger['RELATED']) && strtoupper($trigger['RELATED']) == 'END') ? 'END' : 'START';
$parentComponent = $this->parent;
if ($related === 'START') {
$effectiveTrigger = clone $parentComponent->DTSTART->getDateTime();
$effectiveTrigger->add($triggerDuration);
} else {
if ($parentComponent->name === 'VTODO') {
$endProp = 'DUE';
} elseif ($parentComponent->name === 'VEVENT') {
$endProp = 'DTEND';
} else {
throw new Sabre_DAV_Exception('time-range filters on VALARM components are only supported when they are a child of VTODO or VEVENT');
}
if (isset($parentComponent->$endProp)) {
$effectiveTrigger = clone $parentComponent->$endProp->getDateTime();
$effectiveTrigger->add($triggerDuration);
} elseif (isset($parentComponent->DURATION)) {
$effectiveTrigger = clone $parentComponent->DTSTART->getDateTime();
$duration = Sabre_VObject_DateTimeParser::parseDuration($parentComponent->DURATION);
$effectiveTrigger->add($duration);
$effectiveTrigger->add($triggerDuration);
} else {
$effectiveTrigger = clone $parentComponent->DTSTART->getDateTime();
$effectiveTrigger->add($triggerDuration);
}
}
} else {
$effectiveTrigger = $trigger->getDateTime();
}
return $effectiveTrigger;
}
/**
* 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) {
$effectiveTrigger = $this->getEffectiveTriggerTime();
if (isset($this->DURATION)) {
$duration = Sabre_VObject_DateTimeParser::parseDuration($this->DURATION);
$repeat = (string)$this->repeat;
if (!$repeat) {
$repeat = 1;
}
$period = new DatePeriod($effectiveTrigger, $duration, (int)$repeat);
foreach($period as $occurrence) {
if ($start <= $occurrence && $end > $occurrence) {
return true;
}
}
return false;
} else {
return ($start <= $effectiveTrigger && $end > $effectiveTrigger);
}
}
}
?>
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