mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-10-07 10:32:11 +02:00
460 lines
16 KiB
PHP
460 lines
16 KiB
PHP
<?php
|
|
/**
|
|
* Class representing vFreebusy components.
|
|
*
|
|
* $Horde: framework/iCalendar/iCalendar/vfreebusy.php,v 1.16.10.17 2008/09/17 08:46:57 jan Exp $
|
|
*
|
|
* Copyright 2003-2008 The Horde Project (http://www.horde.org/)
|
|
*
|
|
* See the enclosed file COPYING for license information (LGPL). If you
|
|
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
|
|
*
|
|
* @todo Don't use timestamps
|
|
*
|
|
* @author Mike Cochrane <mike@graftonhall.co.nz>
|
|
* @since Horde 3.0
|
|
* @package Horde_iCalendar
|
|
*/
|
|
class Horde_iCalendar_vfreebusy extends Horde_iCalendar {
|
|
|
|
var $_busyPeriods = array();
|
|
var $_extraParams = array();
|
|
|
|
/**
|
|
* Returns the type of this calendar component.
|
|
*
|
|
* @return string The type of this component.
|
|
*/
|
|
function getType()
|
|
{
|
|
return 'vFreebusy';
|
|
}
|
|
|
|
/**
|
|
* Parses a string containing vFreebusy data.
|
|
*
|
|
* @param string $data The data to parse.
|
|
*/
|
|
function parsevCalendar($data, $type = null, $charset = null)
|
|
{
|
|
parent::parsevCalendar($data, 'VFREEBUSY', $charset);
|
|
|
|
// Do something with all the busy periods.
|
|
foreach ($this->_attributes as $key => $attribute) {
|
|
if ($attribute['name'] != 'FREEBUSY') {
|
|
continue;
|
|
}
|
|
foreach ($attribute['values'] as $value) {
|
|
$params = isset($attribute['params'])
|
|
? $attribute['params']
|
|
: array();
|
|
if (isset($value['duration'])) {
|
|
$this->addBusyPeriod('BUSY', $value['start'], null,
|
|
$value['duration'], $params);
|
|
} else {
|
|
$this->addBusyPeriod('BUSY', $value['start'],
|
|
$value['end'], null, $params);
|
|
}
|
|
}
|
|
unset($this->_attributes[$key]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the component exported as string.
|
|
*
|
|
* @return string The exported vFreeBusy information according to the
|
|
* iCalender format specification.
|
|
*/
|
|
function exportvCalendar()
|
|
{
|
|
foreach ($this->_busyPeriods as $start => $end) {
|
|
$periods = array(array('start' => $start, 'end' => $end));
|
|
$this->setAttribute('FREEBUSY', $periods,
|
|
isset($this->_extraParams[$start])
|
|
? $this->_extraParams[$start] : array());
|
|
}
|
|
|
|
$res = parent::_exportvData('VFREEBUSY');
|
|
|
|
foreach ($this->_attributes as $key => $attribute) {
|
|
if ($attribute['name'] == 'FREEBUSY') {
|
|
unset($this->_attributes[$key]);
|
|
}
|
|
}
|
|
|
|
return $res;
|
|
}
|
|
|
|
/**
|
|
* Returns a display name for this object.
|
|
*
|
|
* @return string A clear text name for displaying this object.
|
|
*/
|
|
function getName()
|
|
{
|
|
$name = '';
|
|
$method = !empty($this->_container) ?
|
|
$this->_container->getAttribute('METHOD') : 'PUBLISH';
|
|
|
|
if (is_a($method, 'PEAR_Error') || $method == 'PUBLISH') {
|
|
$attr = 'ORGANIZER';
|
|
} elseif ($method == 'REPLY') {
|
|
$attr = 'ATTENDEE';
|
|
}
|
|
|
|
$name = $this->getAttribute($attr, true);
|
|
if (!is_a($name, 'PEAR_Error') && isset($name[0]['CN'])) {
|
|
return $name[0]['CN'];
|
|
}
|
|
|
|
$name = $this->getAttribute($attr);
|
|
if (is_a($name, 'PEAR_Error')) {
|
|
return '';
|
|
} else {
|
|
$name = parse_url($name);
|
|
return $name['path'];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the email address for this object.
|
|
*
|
|
* @return string The email address of this object's owner.
|
|
*/
|
|
function getEmail()
|
|
{
|
|
$name = '';
|
|
$method = !empty($this->_container)
|
|
? $this->_container->getAttribute('METHOD') : 'PUBLISH';
|
|
|
|
if (is_a($method, 'PEAR_Error') || $method == 'PUBLISH') {
|
|
$attr = 'ORGANIZER';
|
|
} elseif ($method == 'REPLY') {
|
|
$attr = 'ATTENDEE';
|
|
}
|
|
|
|
$name = $this->getAttribute($attr);
|
|
if (is_a($name, 'PEAR_Error')) {
|
|
return '';
|
|
} else {
|
|
$name = parse_url($name);
|
|
return $name['path'];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the busy periods.
|
|
*
|
|
* @return array All busy periods.
|
|
*/
|
|
function getBusyPeriods()
|
|
{
|
|
return $this->_busyPeriods;
|
|
}
|
|
|
|
/**
|
|
* Returns any additional freebusy parameters.
|
|
*
|
|
* @return array Additional parameters of the freebusy periods.
|
|
*/
|
|
function getExtraParams()
|
|
{
|
|
return $this->_extraParams;
|
|
}
|
|
|
|
/**
|
|
* Returns all the free periods of time in a given period.
|
|
*
|
|
* @param integer $startStamp The start timestamp.
|
|
* @param integer $endStamp The end timestamp.
|
|
*
|
|
* @return array A hash with free time periods, the start times as the
|
|
* keys and the end times as the values.
|
|
*/
|
|
function getFreePeriods($startStamp, $endStamp)
|
|
{
|
|
$this->simplify();
|
|
$periods = array();
|
|
|
|
// Check that we have data for some part of this period.
|
|
if ($this->getEnd() < $startStamp || $this->getStart() > $endStamp) {
|
|
return $periods;
|
|
}
|
|
|
|
// Locate the first time in the requested period we have data for.
|
|
$nextstart = max($startStamp, $this->getStart());
|
|
|
|
// Check each busy period and add free periods in between.
|
|
foreach ($this->_busyPeriods as $start => $end) {
|
|
if ($start <= $endStamp && $end >= $nextstart) {
|
|
if ($nextstart <= $start) {
|
|
$periods[$nextstart] = min($start, $endStamp);
|
|
}
|
|
$nextstart = min($end, $endStamp);
|
|
}
|
|
}
|
|
|
|
// If we didn't read the end of the requested period but still have
|
|
// data then mark as free to the end of the period or available data.
|
|
if ($nextstart < $endStamp && $nextstart < $this->getEnd()) {
|
|
$periods[$nextstart] = min($this->getEnd(), $endStamp);
|
|
}
|
|
|
|
return $periods;
|
|
}
|
|
|
|
/**
|
|
* Adds a busy period to the info.
|
|
*
|
|
* This function may throw away data in case you add a period with a start
|
|
* date that already exists. The longer of the two periods will be chosen
|
|
* (and all information associated with the shorter one will be removed).
|
|
*
|
|
* @param string $type The type of the period. Either 'FREE' or
|
|
* 'BUSY'; only 'BUSY' supported at the moment.
|
|
* @param integer $start The start timestamp of the period.
|
|
* @param integer $end The end timestamp of the period.
|
|
* @param integer $duration The duration of the period. If specified, the
|
|
* $end parameter will be ignored.
|
|
* @param array $extra Additional parameters for this busy period.
|
|
*/
|
|
function addBusyPeriod($type, $start, $end = null, $duration = null,
|
|
$extra = array())
|
|
{
|
|
if ($type == 'FREE') {
|
|
// Make sure this period is not marked as busy.
|
|
return false;
|
|
}
|
|
|
|
// Calculate the end time if duration was specified.
|
|
$tempEnd = is_null($duration) ? $end : $start + $duration;
|
|
|
|
// Make sure the period length is always positive.
|
|
$end = max($start, $tempEnd);
|
|
$start = min($start, $tempEnd);
|
|
|
|
if (isset($this->_busyPeriods[$start])) {
|
|
// Already a period starting at this time. Change the current
|
|
// period only if the new one is longer. This might be a problem
|
|
// if the callee assumes that there is no simplification going
|
|
// on. But since the periods are stored using the start time of
|
|
// the busy periods we have to throw away data here.
|
|
if ($end > $this->_busyPeriods[$start]) {
|
|
$this->_busyPeriods[$start] = $end;
|
|
$this->_extraParams[$start] = $extra;
|
|
}
|
|
} else {
|
|
// Add a new busy period.
|
|
$this->_busyPeriods[$start] = $end;
|
|
$this->_extraParams[$start] = $extra;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns the timestamp of the start of the time period this free busy
|
|
* information covers.
|
|
*
|
|
* @return integer A timestamp.
|
|
*/
|
|
function getStart()
|
|
{
|
|
if (!is_a($this->getAttribute('DTSTART'), 'PEAR_Error')) {
|
|
return $this->getAttribute('DTSTART');
|
|
} elseif (count($this->_busyPeriods)) {
|
|
return min(array_keys($this->_busyPeriods));
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the timestamp of the end of the time period this free busy
|
|
* information covers.
|
|
*
|
|
* @return integer A timestamp.
|
|
*/
|
|
function getEnd()
|
|
{
|
|
if (!is_a($this->getAttribute('DTEND'), 'PEAR_Error')) {
|
|
return $this->getAttribute('DTEND');
|
|
} elseif (count($this->_busyPeriods)) {
|
|
return max(array_values($this->_busyPeriods));
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Merges the busy periods of another Horde_iCalendar_vfreebusy object
|
|
* into this one.
|
|
*
|
|
* This might lead to simplification no matter what you specify for the
|
|
* "simplify" flag since periods with the same start date will lead to the
|
|
* shorter period being removed (see addBusyPeriod).
|
|
*
|
|
* @param Horde_iCalendar_vfreebusy $freebusy A freebusy object.
|
|
* @param boolean $simplify If true, simplify() will
|
|
* called after the merge.
|
|
*/
|
|
function merge($freebusy, $simplify = true)
|
|
{
|
|
if (!is_a($freebusy, 'Horde_iCalendar_vfreebusy')) {
|
|
return false;
|
|
}
|
|
|
|
$extra = $freebusy->getExtraParams();
|
|
foreach ($freebusy->getBusyPeriods() as $start => $end) {
|
|
// This might simplify the busy periods without taking the
|
|
// "simplify" flag into account.
|
|
$this->addBusyPeriod('BUSY', $start, $end, null,
|
|
isset($extra[$start])
|
|
? $extra[$start] : array());
|
|
}
|
|
|
|
$thisattr = $this->getAttribute('DTSTART');
|
|
$thatattr = $freebusy->getAttribute('DTSTART');
|
|
if (is_a($thisattr, 'PEAR_Error') && !is_a($thatattr, 'PEAR_Error')) {
|
|
$this->setAttribute('DTSTART', $thatattr, array(), false);
|
|
} elseif (!is_a($thatattr, 'PEAR_Error')) {
|
|
if ($thatattr < $thisattr) {
|
|
$this->setAttribute('DTSTART', $thatattr, array(), false);
|
|
}
|
|
}
|
|
|
|
$thisattr = $this->getAttribute('DTEND');
|
|
$thatattr = $freebusy->getAttribute('DTEND');
|
|
if (is_a($thisattr, 'PEAR_Error') && !is_a($thatattr, 'PEAR_Error')) {
|
|
$this->setAttribute('DTEND', $thatattr, array(), false);
|
|
} elseif (!is_a($thatattr, 'PEAR_Error')) {
|
|
if ($thatattr > $thisattr) {
|
|
$this->setAttribute('DTEND', $thatattr, array(), false);
|
|
}
|
|
}
|
|
|
|
if ($simplify) {
|
|
$this->simplify();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Removes all overlaps and simplifies the busy periods array as much as
|
|
* possible.
|
|
*/
|
|
function simplify()
|
|
{
|
|
$clean = false;
|
|
$busy = array($this->_busyPeriods, $this->_extraParams);
|
|
while (!$clean) {
|
|
$result = $this->_simplify($busy[0], $busy[1]);
|
|
$clean = $result === $busy;
|
|
$busy = $result;
|
|
}
|
|
|
|
ksort($result[1], SORT_NUMERIC);
|
|
$this->_extraParams = $result[1];
|
|
|
|
ksort($result[0], SORT_NUMERIC);
|
|
$this->_busyPeriods = $result[0];
|
|
}
|
|
|
|
function _simplify($busyPeriods, $extraParams = array())
|
|
{
|
|
$checked = array();
|
|
$checkedExtra = array();
|
|
$checkedEmpty = true;
|
|
|
|
foreach ($busyPeriods as $start => $end) {
|
|
if ($checkedEmpty) {
|
|
$checked[$start] = $end;
|
|
$checkedExtra[$start] = isset($extraParams[$start])
|
|
? $extraParams[$start] : array();
|
|
$checkedEmpty = false;
|
|
} else {
|
|
$added = false;
|
|
foreach ($checked as $testStart => $testEnd) {
|
|
// Replace old period if the new period lies around the
|
|
// old period.
|
|
if ($start <= $testStart && $end >= $testEnd) {
|
|
// Remove old period entry.
|
|
unset($checked[$testStart]);
|
|
unset($checkedExtra[$testStart]);
|
|
// Add replacing entry.
|
|
$checked[$start] = $end;
|
|
$checkedExtra[$start] = isset($extraParams[$start])
|
|
? $extraParams[$start] : array();
|
|
$added = true;
|
|
} elseif ($start >= $testStart && $end <= $testEnd) {
|
|
// The new period lies fully within the old
|
|
// period. Just forget about it.
|
|
$added = true;
|
|
} elseif (($end <= $testEnd && $end >= $testStart) ||
|
|
($start >= $testStart && $start <= $testEnd)) {
|
|
// Now we are in trouble: Overlapping time periods. If
|
|
// we allow for additional parameters we cannot simply
|
|
// choose one of the two parameter sets. It's better
|
|
// to leave two separated time periods.
|
|
$extra = isset($extraParams[$start])
|
|
? $extraParams[$start] : array();
|
|
$testExtra = isset($checkedExtra[$testStart])
|
|
? $checkedExtra[$testStart] : array();
|
|
// Remove old period entry.
|
|
unset($checked[$testStart]);
|
|
unset($checkedExtra[$testStart]);
|
|
// We have two periods overlapping. Are their
|
|
// additional parameters the same or different?
|
|
$newStart = min($start, $testStart);
|
|
$newEnd = max($end, $testEnd);
|
|
if ($extra === $testExtra) {
|
|
// Both periods have the same information. So we
|
|
// can just merge.
|
|
$checked[$newStart] = $newEnd;
|
|
$checkedExtra[$newStart] = $extra;
|
|
} else {
|
|
// Extra parameters are different. Create one
|
|
// period at the beginning with the params of the
|
|
// first period and create a trailing period with
|
|
// the params of the second period. The break
|
|
// point will be the end of the first period.
|
|
$break = min($end, $testEnd);
|
|
$checked[$newStart] = $break;
|
|
$checkedExtra[$newStart] =
|
|
isset($extraParams[$newStart])
|
|
? $extraParams[$newStart] : array();
|
|
$checked[$break] = $newEnd;
|
|
$highStart = max($start, $testStart);
|
|
$checkedExtra[$break] =
|
|
isset($extraParams[$highStart])
|
|
? $extraParams[$highStart] : array();
|
|
|
|
// Ensure we also have the extra data in the
|
|
// extraParams.
|
|
$extraParams[$break] =
|
|
isset($extraParams[$highStart])
|
|
? $extraParams[$highStart] : array();
|
|
}
|
|
$added = true;
|
|
}
|
|
|
|
if ($added) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!$added) {
|
|
$checked[$start] = $end;
|
|
$checkedExtra[$start] = isset($extraParams[$start])
|
|
? $extraParams[$start] : array();
|
|
}
|
|
}
|
|
}
|
|
|
|
return array($checked, $checkedExtra);
|
|
}
|
|
|
|
}
|