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68 lines
2 KiB
PHP
68 lines
2 KiB
PHP
<?php
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namespace Sabre\VObject\Component;
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use Sabre\VObject;
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/**
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* The VFreeBusy component
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*
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* This component adds functionality to a component, specific for VFREEBUSY
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* components.
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*
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* @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
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* @author Evert Pot (http://evertpot.com/)
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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 VFreeBusy extends VObject\Component {
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/**
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* Checks based on the contained FREEBUSY information, if a timeslot is
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* available.
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*
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* @param DateTime $start
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* @param Datetime $end
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* @return bool
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*/
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public function isFree(\DateTime $start, \Datetime $end) {
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foreach($this->select('FREEBUSY') as $freebusy) {
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// We are only interested in FBTYPE=BUSY (the default),
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// FBTYPE=BUSY-TENTATIVE or FBTYPE=BUSY-UNAVAILABLE.
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if (isset($freebusy['FBTYPE']) && strtoupper(substr((string)$freebusy['FBTYPE'],0,4))!=='BUSY') {
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continue;
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}
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// The freebusy component can hold more than 1 value, separated by
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// commas.
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$periods = explode(',', (string)$freebusy);
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foreach($periods as $period) {
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// Every period is formatted as [start]/[end]. The start is an
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// absolute UTC time, the end may be an absolute UTC time, or
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// duration (relative) value.
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list($busyStart, $busyEnd) = explode('/', $period);
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$busyStart = VObject\DateTimeParser::parse($busyStart);
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$busyEnd = VObject\DateTimeParser::parse($busyEnd);
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if ($busyEnd instanceof \DateInterval) {
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$tmp = clone $busyStart;
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$tmp->add($busyEnd);
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$busyEnd = $tmp;
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}
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if($start < $busyEnd && $end > $busyStart) {
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return false;
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}
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}
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}
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return true;
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}
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}
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