/**
* iCal spec represents date in ISO 8601 format followed by "T" then the time
* a "Z at the end means the time is UTC and not local time zone
*
* TODO make sure if time is UTC we take account of system time offset properly
*
*/
function unixTime($ical_date, $tz = false)
{
jimport("joomla.utilities.date");
static $offset = null;
if (is_null($offset)) {
$config =& JFactory::getConfig();
$offset = $config->getValue('config.offset', 0);
}
if (!is_numeric($ical_date)) {
$t = JevDate::strtotime($ical_date);
if (JString::strpos($ical_date, "Z") > 0) {
if (is_callable("date_default_timezone_set")) {
$timezone = date_default_timezone_get();
// See http://www.php.net/manual/en/timezones.php
$params = JComponentHelper::getParams(JEV_COM_COMPONENT);
// server offset tiemzone
if ($params->get("icaltimezone", "") != "") {
date_default_timezone_set($params->get("icaltimezone", ""));
}
// server offset PARAMS
$serveroffset1 = (JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%S', $t)) - JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%SZ', $t))) / 3600;
// server offset SERVER
date_default_timezone_set($timezone);
$serveroffset2 = (JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%S', $t)) - JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%SZ', $t))) / 3600;
$t = new JevDate($ical_date, $serveroffset1 - $serveroffset2);
//$t = new JevDate($ical_date );
date_default_timezone_set($timezone);
echo "icaldate = " . $ical_date . " imported date=" . $t->toMySQL() . "<br/>";
} else {
// Summer Time adjustment
list($y, $m, $d, $h, $min, $s) = explode(":", JevDate::strftime('%Y:%m:%d:%H:%M:%S', $t));
$dst = (JevDate::mktime($h, $min, $s, $m, $d, $y, 0) - JevDate::mktime($h, $min, $s, $m, $d, $y, -1)) / 3600;
// server offset including DST
$serveroffset = (JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%S', $t)) - JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%SZ', $t))) / 3600;
$serveroffset += $dst;
$t = new JevDate($ical_date, -($serveroffset + $offset));
}
/*
echo "<h3>SET TIMEZONE</h3>";
$timezone= date_default_timezone_get();
date_default_timezone_set('America/New_York');
$tempIcal = "20091020T163000Z";
echo $tempIcal."<br/>";
$temp = JevDate::strtotime($tempIcal);
list($y,$m,$d,$h,$min,$s) = explode(":", JevDate::strftime('%Y:%m:%d:%H:%M:%S',$temp));
echo "$y,$m,$d,$h,$min,$s<br/>";
$dst = (JevDate::mktime($h,$min,$s,$m,$d,$y,0)-JevDate::mktime($h,$min,$s,$m,$d,$y,-1))/3600;
$so = (JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%S',$temp))-JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%SZ',$temp)))/3600;
echo " dst=".$dst." serverforoffset=".$so."<br/>";
$so += $dst;
$t = new JevDate($tempIcal);
echo $t->toMySQL()."<br><br/>";
$tempIcal = "20091029T163000Z";
echo $tempIcal."<br/>";
$temp = JevDate::strtotime($tempIcal);
list($y,$m,$d,$h,$min,$s) = explode(":", JevDate::strftime('%Y:%m:%d:%H:%M:%S',$temp));
echo "$y,$m,$d,$h,$min,$s<br/>";
$dst = (JevDate::mktime($h,$min,$s,$m,$d,$y,0)-JevDate::mktime($h,$min,$s,$m,$d,$y,-1))/3600;
$so = (JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%S',$temp))-JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%SZ',$temp)))/3600;
echo " dst=".$dst." serverforoffset=".$so."<br/>";
$so += $dst;
$t = new JevDate($tempIcal );
echo $t->toMySQL()."<br><br/>";
$tempIcal = "20091103T163000Z";
echo $tempIcal."<br/>";
$temp = JevDate::strtotime($tempIcal);
list($y,$m,$d,$h,$min,$s) = explode(":", JevDate::strftime('%Y:%m:%d:%H:%M:%S',$temp));
echo "$y,$m,$d,$h,$min,$s<br/>";
$dst = (JevDate::mktime($h,$min,$s,$m,$d,$y,0)-JevDate::mktime($h,$min,$s,$m,$d,$y,-1))/3600;
$so = (JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%S',$temp))-JevDate::strtotime(JevDate::strftime('%Y%m%dT%H%M%SZ',$temp)))/3600;
echo " dst=".$dst." serverforoffset=".$so."<br/>";
$so += $dst;
$t = new JevDate($tempIcal);
echo $t->toMySQL()."<br>";
*/
} else {
if ($tz != false && $tz != "") {
// really should use the timezone of the inputted date
$tz = new DateTimeZone($tz);
$t = new JevDate($ical_date, $tz);
echo "icaldate = " . $ical_date . " imported date=" . $t->toMySQL() . "<br/>";
} else {
$compparams = JComponentHelper::getParams(JEV_COM_COMPONENT);
$jtz = $compparams->get("icaltimezonelive", "");
if ($jtz) {
$t = new JevDate($ical_date, $jtz);
} else {
$t = new JevDate($ical_date);
}
}
}
//$result = $t->toMySQL();
$result = $t->toUnix();
return $result;
}
$isUTC = false;
if (JString::strpos($ical_date, "Z") !== false) {
$isUTC = true;
}
// strip "T" and "Z" from the string
$ical_date = str_replace('T', '', $ical_date);
$ical_date = str_replace('Z', '', $ical_date);
// split it out intyo YYYY MM DD HH MM SS
preg_match("#([0-9]{4})([0-9]{2})([0-9]{2})([0-9]{0,2})([0-9]{0,2})([0-9]{0,2})#", $ical_date, $date);
list($temp, $y, $m, $d, $h, $min, $s) = $date;
if (!$min) {
$min = 0;
}
if (!$h) {
$h = 0;
}
if (!$d) {
$d = 0;
}
if (!$s) {
$s = 0;
}
// Trap unix dated beofre 1970
$y = max($y, 1970);
if ($isUTC) {
$t = gmJevDate::mktime($h, $min, $s, $m, $d, $y) + 3600 * $offset;
$result = JevDate::strtotime(gmdate('Y-m-d H:i:s', $t));
} else {
$result = JevDate::mktime($h, $min, $s, $m, $d, $y);
}
// double check!!
//list($y1,$m1,$d1,$h1,$min1,$s1)=explode(":",JevDate::strftime('%Y:%m:%d:%H:%M:%S',$result));
return $result;
}