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<?php
/**
* CakeTime utility class file.
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.Utility
* @since CakePHP(tm) v 0.10.0.1076
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/

App::uses('Multibyte', 'I18n');

/**
* Time Helper class for easy use of time data.
*
* Manipulation of time data.
*
* @package Cake.Utility
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html
*/
class CakeTime {

/**
* The format to use when formatting a time using `TimeHelper::nice()`
*
* The format should use the locale strings as defined in the PHP docs under
* `strftime` (http://php.net/manual/en/function.strftime.php)
*
* @var string
* @see CakeTime::format()
*/
public static $niceFormat = '%a, %b %eS %Y, %H:%M';

/**
* Temporary variable containing timestamp value, used internally convertSpecifiers()
*/
protected static $_time = null;

/**
* Magic set method for backward compatibility.
*
* Used by TimeHelper to modify static variables in CakeTime
*/
public function __set($name, $value) {
switch ($name) {
case 'niceFormat':
self::${$name} = $value;
break;
default:
break;
}
}

/**
* Magic set method for backward compatibility.
*
* Used by TimeHelper to get static variables in CakeTime
*/
public function __get($name) {
switch ($name) {
case 'niceFormat':
return self::${$name};
break;
default:
return null;
break;
}
}

/**
* Converts a string representing the format for the function strftime and returns a
* windows safe and i18n aware format.
*
* @param string $format Format with specifiers for strftime function.
* Accepts the special specifier %S which mimics the modifier S for date()
* @param string $time UNIX timestamp
* @return string windows safe and date() function compatible format for strftime
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function convertSpecifiers($format, $time = null) {
if (!$time) {
$time = time();
}
self::$_time = $time;
return preg_replace_callback('/\%(\w+)/', array('CakeTime', '_translateSpecifier'), $format);
}

/**
* Auxiliary function to translate a matched specifier element from a regular expression into
* a windows safe and i18n aware specifier
*
* @param array $specifier match from regular expression
* @return string converted element
*/
protected static function _translateSpecifier($specifier) {
switch ($specifier[1]) {
case 'a':
$abday = __dc('cake', 'abday', 5);
if (is_array($abday)) {
return $abday[date('w', self::$_time)];
}
break;
case 'A':
$day = __dc('cake', 'day', 5);
if (is_array($day)) {
return $day[date('w', self::$_time)];
}
break;
case 'c':
$format = __dc('cake', 'd_t_fmt', 5);
if ($format != 'd_t_fmt') {
return self::convertSpecifiers($format, self::$_time);
}
break;
case 'C':
return sprintf("%02d", date('Y', self::$_time) / 100);
case 'D':
return '%m/%d/%y';
case 'e':
if (DS === '/') {
return '%e';
}
$day = date('j', self::$_time);
if ($day < 10) {
$day = ' ' . $day;
}
return $day;
case 'eS' :
return date('jS', self::$_time);
case 'b':
case 'h':
$months = __dc('cake', 'abmon', 5);
if (is_array($months)) {
return $months[date('n', self::$_time) - 1];
}
return '%b';
case 'B':
$months = __dc('cake', 'mon', 5);
if (is_array($months)) {
return $months[date('n', self::$_time) - 1];
}
break;
case 'n':
return "\n";
case 'p':
case 'P':
$default = array('am' => 0, 'pm' => 1);
$meridiem = $default[date('a', self::$_time)];
$format = __dc('cake', 'am_pm', 5);
if (is_array($format)) {
$meridiem = $format[$meridiem];
return ($specifier[1] == 'P') ? strtolower($meridiem) : strtoupper($meridiem);
}
break;
case 'r':
$complete = __dc('cake', 't_fmt_ampm', 5);
if ($complete != 't_fmt_ampm') {
return str_replace('%p', self::_translateSpecifier(array('%p', 'p')), $complete);
}
break;
case 'R':
return date('H:i', self::$_time);
case 't':
return "\t";
case 'T':
return '%H:%M:%S';
case 'u':
return ($weekDay = date('w', self::$_time)) ? $weekDay : 7;
case 'x':
$format = __dc('cake', 'd_fmt', 5);
if ($format != 'd_fmt') {
return self::convertSpecifiers($format, self::$_time);
}
break;
case 'X':
$format = __dc('cake', 't_fmt', 5);
if ($format != 't_fmt') {
return self::convertSpecifiers($format, self::$_time);
}
break;
}
return $specifier[0];
}

/**
* Converts given time (in server's time zone) to user's local time, given his/her timezone.
*
* @param string $serverTime UNIX timestamp
* @param mixed $timezone User's timezone string or DateTimeZone object
* @return integer UNIX timestamp
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function convert($serverTime, $timezone) {
$serverOffset = self::serverOffset();
$gmtTime = $serverTime - $serverOffset;
if (is_numeric($timezone)) {
$userOffset = $timezone * (60 * 60);
} else {
$timezone = self::timezone($timezone);
$userOffset = $timezone->getOffset(new DateTime('@' . $gmtTime));
}
$userTime = $gmtTime + $userOffset;
return (int)$userTime;
}

/**
* Returns a timezone object from a string or the user's timezone object
*
* @param mixed $timezone Timezone string or DateTimeZone object
* If null it tries to get timezone from 'Config.timezone' config var
* @return DateTimeZone Timezone object
*/
public static function timezone($timezone = null) {
static $tz = null;

if (is_object($timezone)) {
if ($tz === null || $tz->getName() !== $timezone->getName()) {
$tz = $timezone;
}
} else {
if ($timezone === null) {
$timezone = Configure::read('Config.timezone');
if ($timezone === null) {
$timezone = date_default_timezone_get();
}
}

if ($tz === null || $tz->getName() !== $timezone) {
$tz = new DateTimeZone($timezone);
}
}

return $tz;
}

/**
* Returns server's offset from GMT in seconds.
*
* @return integer Offset
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function serverOffset() {
return date('Z', time());
}

/**
* Returns a UNIX timestamp, given either a UNIX timestamp or a valid strtotime() date string.
*
* @param string $dateString Datetime string
* @param mixed $timezone Timezone string or DateTimeZone object
* @return string Parsed timestamp
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function fromString($dateString, $timezone = null) {
if (empty($dateString)) {
return false;
}

if (is_integer($dateString) || is_numeric($dateString)) {
$date = intval($dateString);
} else {
$date = strtotime($dateString);
}

if ($timezone === null) {
$timezone = Configure::read('Config.timezone');
}

if ($timezone !== null) {
return self::convert($date, $timezone);
}
if ($date === -1) {
return false;
}
return $date;
}

/**
* Returns a nicely formatted date string for given Datetime string.
*
* See http://php.net/manual/en/function.strftime.php for information on formatting
* using locale strings.
*
* @param string $dateString Datetime string or Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @param string $format The format to use. If null, `TimeHelper::$niceFormat` is used
* @return string Formatted date string
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function nice($dateString = null, $timezone = null, $format = null) {
if ($dateString != null) {
$date = self::fromString($dateString, $timezone);
} else {
$date = time();
}
if (!$format) {
$format = self::$niceFormat;
}
$format = self::convertSpecifiers($format, $date);
return self::_strftime($format, $date);
}

/**
* Returns a formatted descriptive date string for given datetime string.
*
* If the given date is today, the returned string could be "Today, 16:54".
* If the given date was yesterday, the returned string could be "Yesterday, 16:54".
* If $dateString's year is the current year, the returned string does not
* include mention of the year.
*
* @param string $dateString Datetime string or Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @return string Described, relative date string
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function niceShort($dateString = null, $timezone = null) {
$date = $dateString ? self::fromString($dateString, $timezone) : time();

$y = self::isThisYear($date) ? '' : ' %Y';

if (self::isToday($dateString, $timezone)) {
$ret = __d('cake', 'Today, %s', self::_strftime("%H:%M", $date));
} elseif (self::wasYesterday($dateString, $timezone)) {
$ret = __d('cake', 'Yesterday, %s', self::_strftime("%H:%M", $date));
} else {
$format = self::convertSpecifiers("%b %eS{$y}, %H:%M", $date);
$ret = self::_strftime($format, $date);
}

return $ret;
}

/**
* Returns a partial SQL string to search for all records between two dates.
*
* @param string $begin Datetime string or Unix timestamp
* @param string $end Datetime string or Unix timestamp
* @param string $fieldName Name of database field to compare with
* @param mixed $timezone Timezone string or DateTimeZone object
* @return string Partial SQL string.
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function daysAsSql($begin, $end, $fieldName, $timezone = null) {
$begin = self::fromString($begin, $timezone);
$end = self::fromString($end, $timezone);
$begin = date('Y-m-d', $begin) . ' 00:00:00';
$end = date('Y-m-d', $end) . ' 23:59:59';

return "($fieldName >= '$begin') AND ($fieldName <= '$end')";
}

/**
* Returns a partial SQL string to search for all records between two times
* occurring on the same day.
*
* @param string $dateString Datetime string or Unix timestamp
* @param string $fieldName Name of database field to compare with
* @param mixed $timezone Timezone string or DateTimeZone object
* @return string Partial SQL string.
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function dayAsSql($dateString, $fieldName, $timezone = null) {
return self::daysAsSql($dateString, $dateString, $fieldName);
}

/**
* Returns true if given datetime string is today.
*
* @param string $dateString Datetime string or Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @return boolean True if datetime string is today
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#testing-time
*/
public static function isToday($dateString, $timezone = null) {
$date = self::fromString($dateString, $timezone);
return date('Y-m-d', $date) == date('Y-m-d', time());
}

/**
* Returns true if given datetime string is within this week.
*
* @param string $dateString
* @param mixed $timezone Timezone string or DateTimeZone object
* @return boolean True if datetime string is within current week
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#testing-time
*/
public static function isThisWeek($dateString, $timezone = null) {
$date = self::fromString($dateString, $timezone);
return date('W o', $date) == date('W o', time());
}

/**
* Returns true if given datetime string is within this month
* @param string $dateString
* @param mixed $timezone Timezone string or DateTimeZone object
* @return boolean True if datetime string is within current month
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#testing-time
*/
public static function isThisMonth($dateString, $timezone = null) {
$date = self::fromString($dateString);
return date('m Y', $date) == date('m Y', time());
}

/**
* Returns true if given datetime string is within current year.
*
* @param string $dateString Datetime string or Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @return boolean True if datetime string is within current year
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#testing-time
*/
public static function isThisYear($dateString, $timezone = null) {
$date = self::fromString($dateString, $timezone);
return date('Y', $date) == date('Y', time());
}

/**
* Returns true if given datetime string was yesterday.
*
* @param string $dateString Datetime string or Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @return boolean True if datetime string was yesterday
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#testing-time
*
*/
public static function wasYesterday($dateString, $timezone = null) {
$date = self::fromString($dateString, $timezone);
return date('Y-m-d', $date) == date('Y-m-d', strtotime('yesterday'));
}

/**
* Returns true if given datetime string is tomorrow.
*
* @param string $dateString Datetime string or Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @return boolean True if datetime string was yesterday
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#testing-time
*/
public static function isTomorrow($dateString, $timezone = null) {
$date = self::fromString($dateString, $timezone);
return date('Y-m-d', $date) == date('Y-m-d', strtotime('tomorrow'));
}

/**
* Returns the quarter
*
* @param string $dateString
* @param boolean $range if true returns a range in Y-m-d format
* @return mixed 1, 2, 3, or 4 quarter of year or array if $range true
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function toQuarter($dateString, $range = false) {
$time = self::fromString($dateString);
$date = ceil(date('m', $time) / 3);

if ($range === true) {
$range = 'Y-m-d';
}

if ($range !== false) {
$year = date('Y', $time);

switch ($date) {
case 1:
$date = array($year . '-01-01', $year . '-03-31');
break;
case 2:
$date = array($year . '-04-01', $year . '-06-30');
break;
case 3:
$date = array($year . '-07-01', $year . '-09-30');
break;
case 4:
$date = array($year . '-10-01', $year . '-12-31');
break;
}
}
return $date;
}

/**
* Returns a UNIX timestamp from a textual datetime description. Wrapper for PHP function strtotime().
*
* @param string $dateString Datetime string to be represented as a Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @return integer Unix timestamp
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function toUnix($dateString, $timezone = null) {
return self::fromString($dateString, $timezone);
}

/**
* Returns a formatted date in server's timezone.
*
* @param string $dateString Datetime string
* @param mixed $timezone Timezone string or DateTimeZone object
* @param string $format date format string
* @return mixed Formatted date
*/
public static function toServer($dateString, $timezone = null, $format = 'Y-m-d H:i:s') {
$timezone = self::timezone($timezone);
$time = new DateTime($dateString, $timezone);
$serverTimezone = date_default_timezone_get();
if ($serverTimezone !== $timezone->getName()) {
$time->setTimezone(new DateTimeZone($serverTimezone));
}
return $time->format($format);
}

/**
* Returns a date formatted for Atom RSS feeds.
*
* @param string $dateString Datetime string or Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @return string Formatted date string
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function toAtom($dateString, $timezone = null) {
$date = self::fromString($dateString, $timezone);
return date('Y-m-d\TH:i:s\Z', $date);
}

/**
* Formats date for RSS feeds
*
* @param string $dateString Datetime string or Unix timestamp
* @param mixed $timezone Timezone string or DateTimeZone object
* @return string Formatted date string
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function toRSS($dateString, $timezone = null) {
$date = self::fromString($dateString, $timezone);

if (!is_null($timezone)) {
if (is_numeric($timezone)) {
$userOffset = $timezone;
} else {
if (!is_object($timezone)) {
$timezone = new DateTimeZone($timezone);
}
$currentDate = new DateTime('@' . $date);
$currentDate->setTimezone($timezone);
$userOffset = $timezone->getOffset($currentDate) / 60 / 60;
}
if ($userOffset == 0) {
$timezone = '+0000';
} else {
$hours = (int)floor(abs($userOffset));
$minutes = (int)(fmod(abs($userOffset), $hours) * 60);
$timezone = ($userOffset < 0 ? '-' : '+') . str_pad($hours, 2, '0', STR_PAD_LEFT) . str_pad($minutes, 2, '0', STR_PAD_LEFT);
}
return date('D, d M Y H:i:s', $date) . ' ' . $timezone;
}
return date("r", $date);
}

/**
* Returns either a relative date or a formatted date depending
* on the difference between the current time and given datetime.
* $datetime should be in a <i>strtotime</i> - parsable format, like MySQL's datetime datatype.
*
* ### Options:
*
* - `format` => a fall back format if the relative time is longer than the duration specified by end
* - `end` => The end of relative time telling
* - `userOffset` => Users offset from GMT (in hours)
*
* Relative dates look something like this:
* 3 weeks, 4 days ago
* 15 seconds ago
*
* Default date formatting is d/m/yy e.g: on 18/2/09
*
* The returned string includes 'ago' or 'on' and assumes you'll properly add a word
* like 'Posted ' before the function output.
*
* @param string $dateTime Datetime string or Unix timestamp
* @param array $options Default format if timestamp is used in $dateString
* @return string Relative time string.
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function timeAgoInWords($dateTime, $options = array()) {
$timezone = null;
if (is_array($options)) {
if (isset($options['userOffset'])) {
$timezone = $options['userOffset'];
} elseif (isset($options['timezone'])) {
$timezone = $options['timezone'];
}
}
$now = self::fromString(time(), $timezone);
$inSeconds = self::fromString($dateTime, $timezone);
$backwards = ($inSeconds > $now);

$format = 'j/n/y';
$end = '+1 month';

if (is_array($options)) {
if (isset($options['format'])) {
$format = $options['format'];
unset($options['format']);
}
if (isset($options['end'])) {
$end = $options['end'];
unset($options['end']);
}
} else {
$format = $options;
}

if ($backwards) {
$futureTime = $inSeconds;
$pastTime = $now;
} else {
$futureTime = $now;
$pastTime = $inSeconds;
}
$diff = $futureTime - $pastTime;

// If more than a week, then take into account the length of months
if ($diff >= 604800) {
list($future['H'], $future['i'], $future['s'], $future['d'], $future['m'], $future['Y']) = explode('/', date('H/i/s/d/m/Y', $futureTime));

list($past['H'], $past['i'], $past['s'], $past['d'], $past['m'], $past['Y']) = explode('/', date('H/i/s/d/m/Y', $pastTime));
$years = $months = $weeks = $days = $hours = $minutes = $seconds = 0;

if ($future['Y'] == $past['Y'] && $future['m'] == $past['m']) {
$months = 0;
$years = 0;
} else {
if ($future['Y'] == $past['Y']) {
$months = $future['m'] - $past['m'];
} else {
$years = $future['Y'] - $past['Y'];
$months = $future['m'] + ((12 * $years) - $past['m']);

if ($months >= 12) {
$years = floor($months / 12);
$months = $months - ($years * 12);
}

if ($future['m'] < $past['m'] && $future['Y'] - $past['Y'] == 1) {
$years --;
}
}
}

if ($future['d'] >= $past['d']) {
$days = $future['d'] - $past['d'];
} else {
$daysInPastMonth = date('t', $pastTime);
$daysInFutureMonth = date('t', mktime(0, 0, 0, $future['m'] - 1, 1, $future['Y']));

if (!$backwards) {
$days = ($daysInPastMonth - $past['d']) + $future['d'];
} else {
$days = ($daysInFutureMonth - $past['d']) + $future['d'];
}

if ($future['m'] != $past['m']) {
$months --;
}
}

if ($months == 0 && $years >= 1 && $diff < ($years * 31536000)) {
$months = 11;
$years --;
}

if ($months >= 12) {
$years = $years + 1;
$months = $months - 12;
}

if ($days >= 7) {
$weeks = floor($days / 7);
$days = $days - ($weeks * 7);
}
} else {
$years = $months = $weeks = 0;
$days = floor($diff / 86400);

$diff = $diff - ($days * 86400);

$hours = floor($diff / 3600);
$diff = $diff - ($hours * 3600);

$minutes = floor($diff / 60);
$diff = $diff - ($minutes * 60);
$seconds = $diff;
}
$relativeDate = '';
$diff = $futureTime - $pastTime;

if ($diff > abs($now - self::fromString($end))) {
$relativeDate = __d('cake', 'on %s', date($format, $inSeconds));
} else {
if ($years > 0) {
// years and months and days
$relativeDate .= ($relativeDate ? ', ' : '') . __dn('cake', '%d year', '%d years', $years, $years);
$relativeDate .= $months > 0 ? ($relativeDate ? ', ' : '') . __dn('cake', '%d month', '%d months', $months, $months) : '';
$relativeDate .= $weeks > 0 ? ($relativeDate ? ', ' : '') . __dn('cake', '%d week', '%d weeks', $weeks, $weeks) : '';
$relativeDate .= $days > 0 ? ($relativeDate ? ', ' : '') . __dn('cake', '%d day', '%d days', $days, $days) : '';
} elseif (abs($months) > 0) {
// months, weeks and days
$relativeDate .= ($relativeDate ? ', ' : '') . __dn('cake', '%d month', '%d months', $months, $months);
$relativeDate .= $weeks > 0 ? ($relativeDate ? ', ' : '') . __dn('cake', '%d week', '%d weeks', $weeks, $weeks) : '';
$relativeDate .= $days > 0 ? ($relativeDate ? ', ' : '') . __dn('cake', '%d day', '%d days', $days, $days) : '';
} elseif (abs($weeks) > 0) {
// weeks and days
$relativeDate .= ($relativeDate ? ', ' : '') . __dn('cake', '%d week', '%d weeks', $weeks, $weeks);
$relativeDate .= $days > 0 ? ($relativeDate ? ', ' : '') . __dn('cake', '%d day', '%d days', $days, $days) : '';
} elseif (abs($days) > 0) {
// days and hours
$relativeDate .= ($relativeDate ? ', ' : '') . __dn('cake', '%d day', '%d days', $days, $days);
$relativeDate .= $hours > 0 ? ($relativeDate ? ', ' : '') . __dn('cake', '%d hour', '%d hours', $hours, $hours) : '';
} elseif (abs($hours) > 0) {
// hours and minutes
$relativeDate .= ($relativeDate ? ', ' : '') . __dn('cake', '%d hour', '%d hours', $hours, $hours);
$relativeDate .= $minutes > 0 ? ($relativeDate ? ', ' : '') . __dn('cake', '%d minute', '%d minutes', $minutes, $minutes) : '';
} elseif (abs($minutes) > 0) {
// minutes only
$relativeDate .= ($relativeDate ? ', ' : '') . __dn('cake', '%d minute', '%d minutes', $minutes, $minutes);
} else {
// seconds only
$relativeDate .= ($relativeDate ? ', ' : '') . __dn('cake', '%d second', '%d seconds', $seconds, $seconds);
}

if (!$backwards) {
$relativeDate = __d('cake', '%s ago', $relativeDate);
}
}
return $relativeDate;
}

/**
* Returns true if specified datetime was within the interval specified, else false.
*
* @param mixed $timeInterval the numeric value with space then time type.
* Example of valid types: 6 hours, 2 days, 1 minute.
* @param mixed $dateString the datestring or unix timestamp to compare
* @param mixed $timezone Timezone string or DateTimeZone object
* @return boolean
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#testing-time
*/
public static function wasWithinLast($timeInterval, $dateString, $timezone = null) {
$tmp = str_replace(' ', '', $timeInterval);
if (is_numeric($tmp)) {
$timeInterval = $tmp . ' ' . __d('cake', 'days');
}

$date = self::fromString($dateString, $timezone);
$interval = self::fromString('-' . $timeInterval);

if ($date >= $interval && $date <= time()) {
return true;
}

return false;
}

/**
* Returns gmt as a UNIX timestamp.
*
* @param string $string UNIX timestamp or a valid strtotime() date string
* @return integer UNIX timestamp
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function gmt($string = null) {
if ($string != null) {
$string = self::fromString($string);
} else {
$string = time();
}
$hour = intval(date("G", $string));
$minute = intval(date("i", $string));
$second = intval(date("s", $string));
$month = intval(date("n", $string));
$day = intval(date("j", $string));
$year = intval(date("Y", $string));

return gmmktime($hour, $minute, $second, $month, $day, $year);
}

/**
* Returns a formatted date string, given either a UNIX timestamp or a valid strtotime() date string.
* This function also accepts a time string and a format string as first and second parameters.
* In that case this function behaves as a wrapper for TimeHelper::i18nFormat()
*
* @param string $format date format string (or a DateTime string)
* @param string $date Datetime string (or a date format string)
* @param boolean $invalid flag to ignore results of fromString == false
* @param mixed $timezone Timezone string or DateTimeZone object
* @return string Formatted date string
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function format($format, $date = null, $invalid = false, $timezone = null) {
$time = self::fromString($date, $timezone);
$_time = self::fromString($format, $timezone);

if (is_numeric($_time) && $time === false) {
$format = $date;
return self::i18nFormat($_time, $format, $invalid, $timezone);
}
if ($time === false && $invalid !== false) {
return $invalid;
}
return date($format, $time);
}

/**
* Returns a formatted date string, given either a UNIX timestamp or a valid strtotime() date string.
* It take in account the default date format for the current language if a LC_TIME file is used.
*
* @param string $date Datetime string
* @param string $format strftime format string.
* @param boolean $invalid flag to ignore results of fromString == false
* @param mixed $timezone Timezone string or DateTimeZone object
* @return string Formatted and translated date string
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/time.html#formatting
*/
public static function i18nFormat($date, $format = null, $invalid = false, $timezone = null) {
$date = self::fromString($date, $timezone);
if ($date === false && $invalid !== false) {
return $invalid;
}
if (empty($format)) {
$format = '%x';
}
$format = self::convertSpecifiers($format, $date);
return self::_strftime($format, $date);
}

/**
* Multibyte wrapper for strftime.
*
* Handles utf8_encoding the result of strftime when necessary.
*
* @param string $format Format string.
* @param int $date Timestamp to format.
* @return string formatted string with correct encoding.
*/
protected static function _strftime($format, $date) {
$format = strftime($format, $date);
$encoding = Configure::read('App.encoding');

if (!empty($encoding) && $encoding === 'UTF-8') {
if (function_exists('mb_check_encoding')) {
$valid = mb_check_encoding($format, $encoding);
} else {
$valid = !Multibyte::checkMultibyte($format);
}
if (!$valid) {
$format = utf8_encode($format);
}
}
return $format;
}

}
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