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- <?php
- namespace Sabre\VObject\Component;
- use Sabre\VObject;
- /**
- * The VFreeBusy component
- *
- * This component adds functionality to a component, specific for VFREEBUSY
- * components.
- *
- * @copyright Copyright (C) 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;
- }
- /**
- * A simple list of validation rules.
- *
- * This is simply a list of properties, and how many times they either
- * must or must not appear.
- *
- * Possible values per property:
- * * 0 - Must not appear.
- * * 1 - Must appear exactly once.
- * * + - Must appear at least once.
- * * * - Can appear any number of times.
- * * ? - May appear, but not more than once.
- *
- * @var array
- */
- public function getValidationRules() {
- return array(
- 'UID' => 1,
- 'DTSTAMP' => 1,
- 'CONTACT' => '?',
- 'DTSTART' => '?',
- 'DTEND' => '?',
- 'ORGANIZER' => '?',
- 'URL' => '?',
- 'ATTENDEE' => '*',
- 'COMMENT' => '*',
- 'FREEBUSY' => '*',
- 'REQUEST-STATUS' => '*',
- );
- }
- }
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