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<?php
namespace OldSabre\VObject\Component;
use OldSabre\VObject;
/**
* The VFreeBusy component
*
* This component adds functionality to a component, specific for VFREEBUSY
* components.
*
* @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class VFreeBusy extends VObject\Component {
/**
* Checks based on the contained FREEBUSY information, if a timeslot is
* available.
*
* @param DateTime $start
* @param Datetime $end
* @return bool
*/
public function isFree(\DateTime $start, \Datetime $end) {
foreach($this->select('FREEBUSY') as $freebusy) {
// We are only interested in FBTYPE=BUSY (the default),
// FBTYPE=BUSY-TENTATIVE or FBTYPE=BUSY-UNAVAILABLE.
if (isset($freebusy['FBTYPE']) && strtoupper(substr((string)$freebusy['FBTYPE'],0,4))!=='BUSY') {
continue;
}
// The freebusy component can hold more than 1 value, separated by
// commas.
$periods = explode(',', (string)$freebusy);
foreach($periods as $period) {
// Every period is formatted as [start]/[end]. The start is an
// absolute UTC time, the end may be an absolute UTC time, or
// duration (relative) value.
list($busyStart, $busyEnd) = explode('/', $period);
$busyStart = VObject\DateTimeParser::parse($busyStart);
$busyEnd = VObject\DateTimeParser::parse($busyEnd);
if ($busyEnd instanceof \DateInterval) {
$tmp = clone $busyStart;
$tmp->add($busyEnd);
$busyEnd = $tmp;
}
if($start < $busyEnd && $end > $busyStart) {
return false;
}
}
}
return true;
}
}
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