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<?php
/**
* @package Joomla.Platform
* @subpackage Date
*
* @copyright Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* JDate is a class that stores a date and provides logic to manipulate
* and render that date in a variety of formats.
*
* @property-read string $daysinmonth t - Number of days in the given month.
* @property-read string $dayofweek N - ISO-8601 numeric representation of the day of the week.
* @property-read string $dayofyear z - The day of the year (starting from 0).
* @property-read boolean $isleapyear L - Whether it's a leap year.
* @property-read string $day d - Day of the month, 2 digits with leading zeros.
* @property-read string $hour H - 24-hour format of an hour with leading zeros.
* @property-read string $minute i - Minutes with leading zeros.
* @property-read string $second s - Seconds with leading zeros.
* @property-read string $month m - Numeric representation of a month, with leading zeros.
* @property-read string $ordinal S - English ordinal suffix for the day of the month, 2 characters.
* @property-read string $week W - Numeric representation of the day of the week.
* @property-read string $year Y - A full numeric representation of a year, 4 digits.
*
* @package Joomla.Platform
* @subpackage Date
* @since 11.1
*/
class JDate extends DateTime
{
const DAY_ABBR = "\x021\x03";
const DAY_NAME = "\x022\x03";
const MONTH_ABBR = "\x023\x03";
const MONTH_NAME = "\x024\x03";
/**
* The format string to be applied when using the __toString() magic method.
*
* @var string
* @since 11.1
*/
public static $format = 'Y-m-d H:i:s';
/**
* Placeholder for a DateTimeZone object with GMT as the time zone.
*
* @var object
* @since 11.1
*/
protected static $gmt;
/**
* Placeholder for a DateTimeZone object with the default server
* time zone as the time zone.
*
* @var object
* @since 11.1
*/
protected static $stz;
/**
* The DateTimeZone object for usage in rending dates as strings.
*
* @var DateTimeZone
* @since 12.1
*/
protected $tz;
/**
* Constructor.
*
* @param string $date String in a format accepted by strtotime(), defaults to "now".
* @param mixed $tz Time zone to be used for the date. Might be a string or a DateTimeZone object.
*
* @since 11.1
*/
public function __construct($date = 'now', $tz = null)
{
// Create the base GMT and server time zone objects.
if (empty(self::$gmt) || empty(self::$stz))
{
self::$gmt = new DateTimeZone('GMT');
self::$stz = new DateTimeZone(@date_default_timezone_get());
}
// If the time zone object is not set, attempt to build it.
if (!($tz instanceof DateTimeZone))
{
if ($tz === null)
{
$tz = self::$gmt;
}
elseif (is_string($tz))
{
$tz = new DateTimeZone($tz);
}
}
// If the date is numeric assume a unix timestamp and convert it.
date_default_timezone_set('UTC');
$date = is_numeric($date) ? date('c', $date) : $date;
// Call the DateTime constructor.
parent::__construct($date, $tz);
// Reset the timezone for 3rd party libraries/extension that does not use JDate
date_default_timezone_set(self::$stz->getName());
// Set the timezone object for access later.
$this->tz = $tz;
}
/**
* Magic method to access properties of the date given by class to the format method.
*
* @param string $name The name of the property.
*
* @return mixed A value if the property name is valid, null otherwise.
*
* @since 11.1
*/
public function __get($name)
{
$value = null;
switch ($name)
{
case 'daysinmonth':
$value = $this->format('t', true);
break;
case 'dayofweek':
$value = $this->format('N', true);
break;
case 'dayofyear':
$value = $this->format('z', true);
break;
case 'isleapyear':
$value = (boolean) $this->format('L', true);
break;
case 'day':
$value = $this->format('d', true);
break;
case 'hour':
$value = $this->format('H', true);
break;
case 'minute':
$value = $this->format('i', true);
break;
case 'second':
$value = $this->format('s', true);
break;
case 'month':
$value = $this->format('m', true);
break;
case 'ordinal':
$value = $this->format('S', true);
break;
case 'week':
$value = $this->format('W', true);
break;
case 'year':
$value = $this->format('Y', true);
break;
default:
$trace = debug_backtrace();
trigger_error(
'Undefined property via __get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'],
E_USER_NOTICE
);
}
return $value;
}
/**
* Magic method to render the date object in the format specified in the public
* static member JDate::$format.
*
* @return string The date as a formatted string.
*
* @since 11.1
*/
public function __toString()
{
return (string) parent::format(self::$format);
}
/**
* Proxy for new JDate().
*
* @param string $date String in a format accepted by strtotime(), defaults to "now".
* @param mixed $tz Time zone to be used for the date.
*
* @return JDate
*
* @since 11.3
*/
public static function getInstance($date = 'now', $tz = null)
{
return new JDate($date, $tz);
}
/**
* Translates day of week number to a string.
*
* @param integer $day The numeric day of the week.
* @param boolean $abbr Return the abbreviated day string?
*
* @return string The day of the week.
*
* @since 11.1
*/
public function dayToString($day, $abbr = false)
{
switch ($day)
{
case 0:
return $abbr ? JText::_('SUN') : JText::_('SUNDAY');
case 1:
return $abbr ? JText::_('MON') : JText::_('MONDAY');
case 2:
return $abbr ? JText::_('TUE') : JText::_('TUESDAY');
case 3:
return $abbr ? JText::_('WED') : JText::_('WEDNESDAY');
case 4:
return $abbr ? JText::_('THU') : JText::_('THURSDAY');
case 5:
return $abbr ? JText::_('FRI') : JText::_('FRIDAY');
case 6:
return $abbr ? JText::_('SAT') : JText::_('SATURDAY');
}
}
/**
* Gets the date as a formatted string in a local calendar.
*
* @param string $format The date format specification string (see {@link PHP_MANUAL#date})
* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
* @param boolean $translate True to translate localised strings
*
* @return string The date string in the specified format format.
*
* @since 11.1
*/
public function calendar($format, $local = false, $translate = true)
{
return $this->format($format, $local, $translate);
}
/**
* Gets the date as a formatted string.
*
* @param string $format The date format specification string (see {@link PHP_MANUAL#date})
* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
* @param boolean $translate True to translate localised strings
*
* @return string The date string in the specified format format.
*
* @since 11.1
*/
public function format($format, $local = false, $translate = true)
{
if ($translate)
{
// Do string replacements for date format options that can be translated.
$format = preg_replace('/(^|[^\\\])D/', "\\1" . self::DAY_ABBR, $format);
$format = preg_replace('/(^|[^\\\])l/', "\\1" . self::DAY_NAME, $format);
$format = preg_replace('/(^|[^\\\])M/', "\\1" . self::MONTH_ABBR, $format);
$format = preg_replace('/(^|[^\\\])F/', "\\1" . self::MONTH_NAME, $format);
}
// If the returned time should not be local use GMT.
if ($local == false)
{
parent::setTimezone(self::$gmt);
}
// Format the date.
$return = parent::format($format);
if ($translate)
{
// Manually modify the month and day strings in the formatted time.
if (strpos($return, self::DAY_ABBR) !== false)
{
$return = str_replace(self::DAY_ABBR, $this->dayToString(parent::format('w'), true), $return);
}
if (strpos($return, self::DAY_NAME) !== false)
{
$return = str_replace(self::DAY_NAME, $this->dayToString(parent::format('w')), $return);
}
if (strpos($return, self::MONTH_ABBR) !== false)
{
$return = str_replace(self::MONTH_ABBR, $this->monthToString(parent::format('n'), true), $return);
}
if (strpos($return, self::MONTH_NAME) !== false)
{
$return = str_replace(self::MONTH_NAME, $this->monthToString(parent::format('n')), $return);
}
}
if ($local == false)
{
parent::setTimezone($this->tz);
}
return $return;
}
/**
* Get the time offset from GMT in hours or seconds.
*
* @param boolean $hours True to return the value in hours.
*
* @return float The time offset from GMT either in hours or in seconds.
*
* @since 11.1
*/
public function getOffsetFromGMT($hours = false)
{
return (float) $hours ? ($this->tz->getOffset($this) / 3600) : $this->tz->getOffset($this);
}
/**
* Translates month number to a string.
*
* @param integer $month The numeric month of the year.
* @param boolean $abbr If true, return the abbreviated month string
*
* @return string The month of the year.
*
* @since 11.1
*/
public function monthToString($month, $abbr = false)
{
switch ($month)
{
case 1:
return $abbr ? JText::_('JANUARY_SHORT') : JText::_('JANUARY');
case 2:
return $abbr ? JText::_('FEBRUARY_SHORT') : JText::_('FEBRUARY');
case 3:
return $abbr ? JText::_('MARCH_SHORT') : JText::_('MARCH');
case 4:
return $abbr ? JText::_('APRIL_SHORT') : JText::_('APRIL');
case 5:
return $abbr ? JText::_('MAY_SHORT') : JText::_('MAY');
case 6:
return $abbr ? JText::_('JUNE_SHORT') : JText::_('JUNE');
case 7:
return $abbr ? JText::_('JULY_SHORT') : JText::_('JULY');
case 8:
return $abbr ? JText::_('AUGUST_SHORT') : JText::_('AUGUST');
case 9:
return $abbr ? JText::_('SEPTEMBER_SHORT') : JText::_('SEPTEMBER');
case 10:
return $abbr ? JText::_('OCTOBER_SHORT') : JText::_('OCTOBER');
case 11:
return $abbr ? JText::_('NOVEMBER_SHORT') : JText::_('NOVEMBER');
case 12:
return $abbr ? JText::_('DECEMBER_SHORT') : JText::_('DECEMBER');
}
}
/**
* Method to wrap the setTimezone() function and set the internal time zone object.
*
* @param DateTimeZone $tz The new DateTimeZone object.
*
* @return JDate
*
* @since 11.1
* @note This method can't be type hinted due to a PHP bug: https://bugs.php.net/bug.php?id=61483
*/
public function setTimezone($tz)
{
$this->tz = $tz;
return parent::setTimezone($tz);
}
/**
* Gets the date as an ISO 8601 string. IETF RFC 3339 defines the ISO 8601 format
* and it can be found at the IETF Web site.
*
* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
*
* @return string The date string in ISO 8601 format.
*
* @link http://www.ietf.org/rfc/rfc3339.txt
* @since 11.1
*/
public function toISO8601($local = false)
{
return $this->format(DateTime::RFC3339, $local, false);
}
/**
* Gets the date as an SQL datetime string.
*
* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
* @param JDatabaseDriver $db The database driver or null to use JFactory::getDbo()
*
* @return string The date string in SQL datetime format.
*
* @link http://dev.mysql.com/doc/refman/5.0/en/datetime.html
* @since 11.4
*/
public function toSql($local = false, JDatabaseDriver $db = null)
{
if ($db === null)
{
$db = JFactory::getDbo();
}
return $this->format($db->getDateFormat(), $local, false);
}
/**
* Gets the date as an RFC 822 string. IETF RFC 2822 supercedes RFC 822 and its definition
* can be found at the IETF Web site.
*
* @param boolean $local True to return the date string in the local time zone, false to return it in GMT.
*
* @return string The date string in RFC 822 format.
*
* @link http://www.ietf.org/rfc/rfc2822.txt
* @since 11.1
*/
public function toRFC822($local = false)
{
return $this->format(DateTime::RFC2822, $local, false);
}
/**
* Gets the date as UNIX time stamp.
*
* @return integer The date as a UNIX timestamp.
*
* @since 11.1
*/
public function toUnix()
{
return (int) parent::format('U');
}
}