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<?php
/**
* Time Helper class file.
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2009, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2009, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.view.helpers
* @since CakePHP(tm) v 0.10.0.1076
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
/**
* Time Helper class for easy use of time data.
*
* Manipulation of time data.
*
* @package cake
* @subpackage cake.cake.libs.view.helpers
*/
class TimeHelper extends AppHelper {
/**
* Converts a string representing the format for the function strftime and returns a
* windows safe and i18n aware format.
*
* @param string $format Format with specifiers for strftime function. Accepts the special specifier %S which mimics th modifier S for date()
* @param string UNIX timestamp
* @return string windows safe and date() function compatible format for strftime
*/
function convertSpecifiers($format, $time = null) {
if (!$time) {
$time = time();
}
$this->__time = $time;
return preg_replace_callback('/\%(\w+)/', array($this, '__translateSpecifier'), $format);
}
/**
* Auxiliary function to translate a matched specifier element from a regular expresion into
* a windows safe and i18n aware specifier
*
* @param array $specifier match from regular expression
* @return string converted element
*/
function __translateSpecifier($specifier) {
switch ($specifier[1]) {
case 'a':
$abday = __c('abday', 5, true);
if (is_array($abday)) {
return $abday[date('w', $this->__time)];
}
break;
case 'A':
$day = __c('day',5,true);
if (is_array($day)) {
return $day[date('w', $this->__time)];
}
break;
case 'c':
$format = __c('d_t_fmt',5,true);
if ($format != 'd_t_fmt') {
return $this->convertSpecifiers($format, $this->__time);
}
break;
case 'C':
return sprintf("%02d", date('Y', $this->__time) / 100);
case 'D':
return '%m/%d/%y';
case 'eS' :
return date('jS', $this->__time);
case 'b':
case 'h':
$months = __c('abmon', 5, true);
if (is_array($months)) {
return $months[date('n', $this->__time) -1];
}
return '%b';
case 'B':
$months = __c('mon',5,true);
if (is_array($months)) {
return $months[date('n', $this->__time) -1];
}
break;
case 'n':
return "\n";
case 'p':
case 'P':
$default = array('am' => 0, 'pm' => 1);
$meridiem = $default[date('a',$this->__time)];
$format = __c('am_pm', 5, true);
if (is_array($format)) {
$meridiem = $format[$meridiem];
return ($specifier[1] == 'P') ? strtolower($meridiem) : strtoupper($meridiem);
}
break;
case 'r':
$complete = __c('t_fmt_ampm', 5, true);
if ($complete != 't_fmt_ampm') {
return str_replace('%p',$this->__translateSpecifier(array('%p', 'p')),$complete);
}
break;
case 'R':
return date('H:i', $this->__time);
case 't':
return "\t";
case 'T':
return '%H:%M:%S';
case 'u':
return ($weekDay = date('w', $this->__time)) ? $weekDay : 7;
case 'x':
$format = __c('d_fmt', 5, true);
if ($format != 'd_fmt') {
return $this->convertSpecifiers($format, $this->__time);
}
break;
case 'X':
$format = __c('t_fmt',5,true);
if ($format != 't_fmt') {
return $this->convertSpecifiers($format, $this->__time);
}
break;
}
return $specifier[0];
}
/**
* Converts given time (in server's time zone) to user's local time, given his/her offset from GMT.
*
* @param string $serverTime UNIX timestamp
* @param int $userOffset User's offset from GMT (in hours)
* @return string UNIX timestamp
*/
function convert($serverTime, $userOffset) {
$serverOffset = $this->serverOffset();
$gmtTime = $serverTime - $serverOffset;
$userTime = $gmtTime + $userOffset * (60*60);
return $userTime;
}
/**
* Returns server's offset from GMT in seconds.
*
* @return int Offset
*/
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 int $userOffset User's offset from GMT (in hours)
* @return string Parsed timestamp
*/
function fromString($dateString, $userOffset = null) {
if (empty($dateString)) {
return false;
}
if (is_integer($dateString) || is_numeric($dateString)) {
$date = intval($dateString);
} else {
$date = strtotime($dateString);
}
if ($userOffset !== null) {
return $this->convert($date, $userOffset);
}
return $date;
}
/**
* Returns a nicely formatted date string for given Datetime string.
*
* @param string $dateString Datetime string or Unix timestamp
* @param int $userOffset User's offset from GMT (in hours)
* @return string Formatted date string
*/
function nice($dateString = null, $userOffset = null) {
if ($dateString != null) {
$date = $this->fromString($dateString, $userOffset);
} else {
$date = time();
}
$format = $this->convertSpecifiers('%a, %b %eS %Y, %H:%M', $date);
return strftime($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 int $userOffset User's offset from GMT (in hours)
* @return string Described, relative date string
*/
function niceShort($dateString = null, $userOffset = null) {
$date = $dateString ? $this->fromString($dateString, $userOffset) : time();
$y = $this->isThisYear($date) ? '' : ' %Y';
if ($this->isToday($date)) {
$ret = sprintf(__('Today, %s',true), strftime("%H:%M", $date));
} elseif ($this->wasYesterday($date)) {
$ret = sprintf(__('Yesterday, %s',true), strftime("%H:%M", $date));
} else {
$format = $this->convertSpecifiers("%b %eS{$y}, %H:%M", $date);
$ret = strftime($format, $date);
}
return $ret;
}
/**
* Returns a partial SQL string to search for all records between two dates.
*
* @param string $dateString Datetime string or Unix timestamp
* @param string $end Datetime string or Unix timestamp
* @param string $fieldName Name of database field to compare with
* @param int $userOffset User's offset from GMT (in hours)
* @return string Partial SQL string.
*/
function daysAsSql($begin, $end, $fieldName, $userOffset = null) {
$begin = $this->fromString($begin, $userOffset);
$end = $this->fromString($end, $userOffset);
$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 int $userOffset User's offset from GMT (in hours)
* @return string Partial SQL string.
*/
function dayAsSql($dateString, $fieldName, $userOffset = null) {
$date = $this->fromString($dateString, $userOffset);
$ret = $this->daysAsSql($dateString, $dateString, $fieldName);
return $ret;
}
/**
* Returns true if given datetime string is today.
*
* @param string $dateString Datetime string or Unix timestamp
* @param int $userOffset User's offset from GMT (in hours)
* @return boolean True if datetime string is today
*/
function isToday($dateString, $userOffset = null) {
$date = $this->fromString($dateString, $userOffset);
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 int $userOffset User's offset from GMT (in hours)
* @return boolean True if datetime string is within current week
*/
function isThisWeek($dateString, $userOffset = null) {
$date = $this->fromString($dateString, $userOffset);
return date('W Y', $date) == date('W Y', time());
}
/**
* Returns true if given datetime string is within this month
* @param string $dateString
* @param int $userOffset User's offset from GMT (in hours)
* @return boolean True if datetime string is within current month
*/
function isThisMonth($dateString, $userOffset = null) {
$date = $this->fromString($dateString);
return date('m Y',$date) == date('m Y', time());
}
/**
* Returns true if given datetime string is within current year.
*
* @param string $dateString Datetime string or Unix timestamp
* @return boolean True if datetime string is within current year
*/
function isThisYear($dateString, $userOffset = null) {
$date = $this->fromString($dateString, $userOffset);
return date('Y', $date) == date('Y', time());
}
/**
* Returns true if given datetime string was yesterday.
*
* @param string $dateString Datetime string or Unix timestamp
* @param int $userOffset User's offset from GMT (in hours)
* @return boolean True if datetime string was yesterday
*/
function wasYesterday($dateString, $userOffset = null) {
$date = $this->fromString($dateString, $userOffset);
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 int $userOffset User's offset from GMT (in hours)
* @return boolean True if datetime string was yesterday
*/
function isTomorrow($dateString, $userOffset = null) {
$date = $this->fromString($dateString, $userOffset);
return date('Y-m-d', $date) == date('Y-m-d', strtotime('tomorrow'));
}
/**
* Returns the quart
* @param string $dateString
* @param boolean $range if true returns a range in Y-m-d format
* @return boolean True if datetime string is within current week
*/
function toQuarter($dateString, $range = false) {
$time = $this->fromString($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 int $userOffset User's offset from GMT (in hours)
* @return integer Unix timestamp
*/
function toUnix($dateString, $userOffset = null) {
$ret = $this->fromString($dateString, $userOffset);
return $ret;
}
/**
* Returns a date formatted for Atom RSS feeds.
*
* @param string $dateString Datetime string or Unix timestamp
* @param int $userOffset User's offset from GMT (in hours)
* @return string Formatted date string
*/
function toAtom($dateString, $userOffset = null) {
$date = $this->fromString($dateString, $userOffset);
$ret = date('Y-m-d\TH:i:s\Z', $date);
return $ret;
}
/**
* Formats date for RSS feeds
*
* @param string $dateString Datetime string or Unix timestamp
* @param int $userOffset User's offset from GMT (in hours)
* @return string Formatted date string
*/
function toRSS($dateString, $userOffset = null) {
$date = $this->fromString($dateString, $userOffset);
$ret = date("r", $date);
return $ret;
}
/**
* 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 $dateString Datetime string or Unix timestamp
* @param array $options Default format if timestamp is used in $dateString
* @return string Relative time string.
*/
function timeAgoInWords($dateTime, $options = array()) {
$userOffset = null;
if (is_array($options) && isset($options['userOffset'])) {
$userOffset = $options['userOffset'];
}
$now = time();
if (!is_null($userOffset)) {
$now = $this->convert(time(), $userOffset);
}
$inSeconds = $this->fromString($dateTime, $userOffset);
$backwards = ($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) {
$current = array();
$date = array();
list($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 - $this->fromString($end))) {
$relativeDate = sprintf(__('on %s',true), date($format, $inSeconds));
} else {
if ($years > 0) {
// years and months and days
$relativeDate .= ($relativeDate ? ', ' : '') . $years . ' ' . __n('year', 'years', $years, true);
$relativeDate .= $months > 0 ? ($relativeDate ? ', ' : '') . $months . ' ' . __n('month', 'months', $months, true) : '';
$relativeDate .= $weeks > 0 ? ($relativeDate ? ', ' : '') . $weeks . ' ' . __n('week', 'weeks', $weeks, true) : '';
$relativeDate .= $days > 0 ? ($relativeDate ? ', ' : '') . $days . ' ' . __n('day', 'days', $days, true) : '';
} elseif (abs($months) > 0) {
// months, weeks and days
$relativeDate .= ($relativeDate ? ', ' : '') . $months . ' ' . __n('month', 'months', $months, true);
$relativeDate .= $weeks > 0 ? ($relativeDate ? ', ' : '') . $weeks . ' ' . __n('week', 'weeks', $weeks, true) : '';
$relativeDate .= $days > 0 ? ($relativeDate ? ', ' : '') . $days . ' ' . __n('day', 'days', $days, true) : '';
} elseif (abs($weeks) > 0) {
// weeks and days
$relativeDate .= ($relativeDate ? ', ' : '') . $weeks . ' ' . __n('week', 'weeks', $weeks, true);
$relativeDate .= $days > 0 ? ($relativeDate ? ', ' : '') . $days . ' ' . __n('day', 'days', $days, true) : '';
} elseif (abs($days) > 0) {
// days and hours
$relativeDate .= ($relativeDate ? ', ' : '') . $days . ' ' . __n('day', 'days', $days, true);
$relativeDate .= $hours > 0 ? ($relativeDate ? ', ' : '') . $hours . ' ' . __n('hour', 'hours', $hours, true) : '';
} elseif (abs($hours) > 0) {
// hours and minutes
$relativeDate .= ($relativeDate ? ', ' : '') . $hours . ' ' . __n('hour', 'hours', $hours, true);
$relativeDate .= $minutes > 0 ? ($relativeDate ? ', ' : '') . $minutes . ' ' . __n('minute', 'minutes', $minutes, true) : '';
} elseif (abs($minutes) > 0) {
// minutes only
$relativeDate .= ($relativeDate ? ', ' : '') . $minutes . ' ' . __n('minute', 'minutes', $minutes, true);
} else {
// seconds only
$relativeDate .= ($relativeDate ? ', ' : '') . $seconds . ' ' . __n('second', 'seconds', $seconds, true);
}
if (!$backwards) {
$relativeDate = sprintf(__('%s ago', true), $relativeDate);
}
}
return $relativeDate;
}
/**
* Alias for timeAgoInWords
*
* @param mixed $dateTime Datetime string (strtotime-compatible) or Unix timestamp
* @param mixed $options Default format string, if timestamp is used in $dateTime, or an array of options to be passed
* on to timeAgoInWords().
* @return string Relative time string.
* @see TimeHelper::timeAgoInWords
*/
function relativeTime($dateTime, $options = array()) {
return $this->timeAgoInWords($dateTime, $options);
}
/**
* 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 int $userOffset User's offset from GMT (in hours)
* @return bool
*/
function wasWithinLast($timeInterval, $dateString, $userOffset = null) {
$tmp = str_replace(' ', '', $timeInterval);
if (is_numeric($tmp)) {
$timeInterval = $tmp . ' ' . __('days', true);
}
$date = $this->fromString($dateString, $userOffset);
$interval = $this->fromString('-'.$timeInterval);
if ($date >= $interval && $date <= time()) {
return true;
}
return false;
}
/**
* Returns gmt, given either a UNIX timestamp or a valid strtotime() date string.
*
* @param string $dateString Datetime string
* @return string Formatted date string
*/
function gmt($string = null) {
if ($string != null) {
$string = $this->fromString($string);
} else {
$string = time();
}
$string = $this->fromString($string);
$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);
return $return;
}
/**
* Returns a formatted date string, given either a UNIX timestamp or a valid strtotime() date string.
*
* @param string $format date format string.
* @param string $dateString Datetime string
* @param boolean $invalid flag to ignore results of fromString == false
* @param int $userOffset User's offset from GMT (in hours)
* @return string Formatted date string
*/
function format($format, $date = null, $invalid = false, $userOffset = null) {
$time = $this->fromString($date, $userOffset);
$_time = $this->fromString($format, $userOffset);
if (is_numeric($_time) && $time === false) {
$format = $date;
return $this->i18nFormat($_time, $format, $invalid, $userOffset);
}
if ($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.
* You must set the correct locale using setlocale() in order to translate day and month names
* @param string $dateString Datetime string
* @param string $format strftime format string.
* @param boolean $invalid flag to ignore results of fromString == false
* @param int $userOffset User's offset from GMT (in hours)
* @return string Formatted and translated date string
*/
function i18nFormat($date, $format = null, $invalid = false, $userOffset = null) {
$date = $this->fromString($date, $userOffset);
if ($date === false && $invalid !== false) {
return $invalid;
}
if (empty($format)) {
$format = '%x';
}
$format = $this->convertSpecifiers($format, $date);
return strftime($format, $date);
}
}
?>
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