/**
* transforms a dateTime from a timezone to another using PHP DateTime and DateTimeZone class (PHP >= PHP 5.2.0)
*
* @author Kjell-Inge Gustafsson, kigkonsult <*****@*****.**>
* @since 2.11.14 - 2012-01-24
* @param mixed $date, date to alter
* @param string $tzFrom, PHP valid old timezone
* @param string $tzTo, PHP valid new timezone, default 'UTC'
* @param string $format, date output format, default 'Ymd\THis'
* @return bool
*/
public static function transformDateTime(&$date, $tzFrom, $tzTo = 'UTC', $format = 'Ymd\\THis')
{
if (!class_exists('DateTime') || !class_exists('DateTimeZone')) {
return FALSE;
}
if (is_array($date) && isset($date['timestamp'])) {
$timestamp = $date['timestamp'];
} elseif (iCalUtilityFunctions::_isArrayDate($date)) {
if (isset($date['tz'])) {
unset($date['tz']);
}
$date = iCalUtilityFunctions::_format_date_time(iCalUtilityFunctions::_date_time_array($date));
if ('Z' == substr($date, -1)) {
$date = substr($date, 0, strlen($date) - 2);
}
if (FALSE === ($timestamp = strtotime($date))) {
return FALSE;
}
} elseif (FALSE === ($timestamp = @strtotime($date))) {
return FALSE;
}
try {
$d = new DateTime(date('Y-m-d H:i:s', $timestamp), new DateTimeZone($tzFrom));
$d->setTimezone(new DateTimeZone($tzTo));
} catch (Exception $e) {
return FALSE;
}
$date = $d->format($format);
return TRUE;
}
/**
* creates formatted output for calendar component property data value type recur
*
* @author Kjell-Inge Gustafsson, kigkonsult <*****@*****.**>
* @since 2.4.8 - 2008-10-22
* @param array $recurlabel
* @param array $recurdata
* @return string
*/
function _format_recur($recurlabel, $recurdata)
{
$output = null;
foreach ($recurdata as $therule) {
if (empty($therule['value'])) {
if ($this->getConfig('allowEmpty')) {
$output .= $this->_createElement($recurlabel);
}
continue;
}
$attributes = isset($therule['params']) ? $this->_createParams($therule['params']) : null;
$content1 = $content2 = null;
foreach ($therule['value'] as $rulelabel => $rulevalue) {
switch ($rulelabel) {
case 'FREQ':
$content1 .= "FREQ={$rulevalue}";
break;
case 'UNTIL':
$content2 .= ";UNTIL=";
$content2 .= iCalUtilityFunctions::_format_date_time($rulevalue);
break;
case 'COUNT':
case 'INTERVAL':
case 'WKST':
$content2 .= ";{$rulelabel}={$rulevalue}";
break;
case 'BYSECOND':
case 'BYMINUTE':
case 'BYHOUR':
case 'BYMONTHDAY':
case 'BYYEARDAY':
case 'BYWEEKNO':
case 'BYMONTH':
case 'BYSETPOS':
$content2 .= ";{$rulelabel}=";
if (is_array($rulevalue)) {
foreach ($rulevalue as $vix => $valuePart) {
$content2 .= $vix ? ',' : null;
$content2 .= $valuePart;
}
} else {
$content2 .= $rulevalue;
}
break;
case 'BYDAY':
$content2 .= ";{$rulelabel}=";
$bydaycnt = 0;
foreach ($rulevalue as $vix => $valuePart) {
$content21 = $content22 = null;
if (is_array($valuePart)) {
$content2 .= $bydaycnt ? ',' : null;
foreach ($valuePart as $vix2 => $valuePart2) {
if ('DAY' != strtoupper($vix2)) {
$content21 .= $valuePart2;
} else {
$content22 .= $valuePart2;
}
}
$content2 .= $content21 . $content22;
$bydaycnt++;
} else {
$content2 .= $bydaycnt ? ',' : null;
if ('DAY' != strtoupper($vix)) {
$content21 .= $valuePart;
} else {
$content22 .= $valuePart;
$bydaycnt++;
}
$content2 .= $content21 . $content22;
}
}
break;
default:
$content2 .= ";{$rulelabel}={$rulevalue}";
break;
}
}
$output .= $this->_createElement($recurlabel, $attributes, $content1 . $content2);
}
return $output;
}
