/usr/share/php/Horde/Icalendar/Vtimezone.php is in php-horde-icalendar 2.0.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Class representing vTimezones.
*
* Copyright 2003-2013 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @author Mike Cochrane <mike@graftonhall.co.nz>
* @category Horde
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Icalendar
*/
class Horde_Icalendar_Vtimezone extends Horde_Icalendar
{
/**
* The component type of this class.
*
* @var string
*/
public $type = 'vTimeZone';
/**
* TODO
*
* @return TODO
*/
public function exportvCalendar()
{
return $this->_exportvData('VTIMEZONE');
}
/**
* Parse child components of the vTimezone component. Returns an
* array with the exact time of the time change as well as the
* 'from' and 'to' offsets around the change. Time is arbitrarily
* based on UTC for comparison.
*
* @param &$child TODO
* @param $year TODO
*
* @return TODO
*/
public function parseChild(&$child, $year)
{
// Make sure 'time' key is first for sort().
$result['time'] = 0;
try {
$t = $child->getAttribute('TZOFFSETFROM');
} catch (Horde_Icalendar_Exception $e) {
return array();
}
$result['from'] = ($t['hour'] * 60 * 60 + $t['minute'] * 60) * ($t['ahead'] ? 1 : -1);
try {
$t = $child->getAttribute('TZOFFSETTO');
} catch (Horde_Icalendar_Exception $e) {
return array();
}
$result['to'] = ($t['hour'] * 60 * 60 + $t['minute'] * 60) * ($t['ahead'] ? 1 : -1);
try {
$start = $child->getAttribute('DTSTART');
} catch (Horde_Icalendar_Exception $e) {
return array();
}
if (!is_int($start)) {
return array();
}
$start = getdate($start);
if ($start['year'] > $year) {
return array();
}
$results = array();
try {
$rdates = $child->getAttributeValues('RDATE');
foreach ($rdates as $rdate) {
if ($rdate['year'] == $year || $rdate['year'] == $year - 1) {
$result['time'] = gmmktime(
$start['hours'], $start['minutes'], $start['seconds'],
$rdate['month'], $rdate['mday'], $rdate['year']);
$results[] = $result;
}
}
} catch (Horde_Icalendar_Exception $e) {
}
try {
$rrules = $child->getAttribute('RRULE');
} catch (Horde_Icalendar_Exception $e) {
if (!$results) {
$result['time'] = $start[0];
$results[] = $result;
}
return $results;
}
$rrules = explode(';', $rrules);
foreach ($rrules as $rrule) {
$t = explode('=', $rrule);
switch ($t[0]) {
case 'FREQ':
if ($t[1] != 'YEARLY') {
return array();
}
break;
case 'INTERVAL':
if ($t[1] != '1') {
return array();
}
break;
case 'BYMONTH':
$month = intval($t[1]);
break;
case 'BYDAY':
$len = strspn($t[1], '1234567890-+');
if ($len == 0) {
return array();
}
$weekday = substr($t[1], $len);
$weekdays = array(
'SU' => 0,
'MO' => 1,
'TU' => 2,
'WE' => 3,
'TH' => 4,
'FR' => 5,
'SA' => 6
);
$weekday = $weekdays[$weekday];
$which = intval(substr($t[1], 0, $len));
break;
case 'UNTIL':
if (intval($year) > intval(substr($t[1], 0, 4))) {
return array();
}
break;
}
}
if (empty($month) || !isset($weekday)) {
return array();
}
// Get the timestamp for the first day of $month.
$when = gmmktime($start['hours'], $start['minutes'], $start['seconds'],
$month, 1, $year);
// Get the day of the week for the first day of $month.
$first_of_month_weekday = intval(gmstrftime('%w', $when));
// Go to the first $weekday before first day of $month.
if ($weekday >= $first_of_month_weekday) {
$weekday -= 7;
}
$when -= ($first_of_month_weekday - $weekday) * 60 * 60 * 24;
// If going backwards go to the first $weekday after last day
// of $month.
if ($which < 0) {
do {
$when += 60*60*24*7;
} while (intval(gmstrftime('%m', $when)) == $month);
}
// Calculate $weekday number $which.
$when += $which * 60 * 60 * 24 * 7;
$result['time'] = $when;
$results[] = $result;
return $results;
}
}
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