Current File : /home/lightco1/upgrade.lightco.com.au/libraries/fof30/Utils/TimezoneWrangler.php
<?php
/**
* @package FOF
* @copyright 2010-2017 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU GPL version 2 or later
*/
namespace FOF30\Utils;
use DateTime;
use DateTimeZone;
use Exception;
use FOF30\Container\Container;
use FOF30\Date\Date;
use JUser;
/**
* A helper class to wrangle timezones, as used by Joomla!.
*
* @package FOF30\Utils
*
* @since 3.1.3
*/
class TimezoneWrangler
{
/**
* The default timestamp format string to use when one is not provided
*
* @var string
*/
protected $defaultFormat = 'Y-m-d H:i:s T';
/**
* When set, this timezone will be used instead of the Joomla! applicable timezone for the user.
*
* @var DateTimeZone
*/
protected $forcedTimezone = null;
/**
* Cache of user IDs to applicable timezones
*
* @var array
*/
protected $userToTimezone = [];
/**
* The component container for which we are created
*
* @var Container
*/
protected $container;
public function __construct(Container $container)
{
$this->container = $container;
}
/**
* Get the default timestamp format to use when one is not provided
*
* @return string
*/
public function getDefaultFormat()
{
return $this->defaultFormat;
}
/**
* Set the default timestamp format to use when one is not provided
*
* @param string $defaultFormat
*
* @return void
*/
public function setDefaultFormat($defaultFormat)
{
$this->defaultFormat = $defaultFormat;
}
/**
* Returns the forced timezone which is used instead of the applicable Joomla! timezone.
*
* @return DateTimeZone
*/
public function getForcedTimezone()
{
return $this->forcedTimezone;
}
/**
* Sets the forced timezone which is used instead of the applicable Joomla! timezone. If the new timezone is
* different than the existing one we will also reset the user to timezone cache.
*
* @param DateTimeZone|string $forcedTimezone
*
* @return void
*/
public function setForcedTimezone($forcedTimezone)
{
// Are we unsetting the forced TZ?
if (empty($forcedTimezone))
{
$this->forcedTimezone = null;
$this->resetCache();
return;
}
// If the new TZ is a string we have to create an object
if (is_string($forcedTimezone))
{
$forcedTimezone = new DateTimeZone($forcedTimezone);
}
$oldTZ = '';
if (is_object($this->forcedTimezone) && ($this->forcedTimezone instanceof DateTimeZone))
{
$oldTZ = $this->forcedTimezone->getName();
}
if ($oldTZ == $forcedTimezone->getName())
{
return;
}
$this->forcedTimezone = $forcedTimezone;
$this->resetCache();
}
/**
* Reset the user to timezone cache. This is done automatically every time you change the forced timezone.
*/
public function resetCache()
{
$this->userToTimezone = [];
}
/**
* Get the applicable timezone for a user. If the user is not a guest and they have a timezone set up in their
* profile it will be used. Otherwise we fall back to the Server Timezone as set up in Global Configuration. If that
* fails, we use GMT. However, if you have used a non-blank forced timezone that will be used instead, circumventing
* this calculation. Therefore the returned timezone is one of the following, by descending order of priority:
* - Forced timezone
* - User's timezone (explicitly set in their user profile)
* - Server Timezone (from Joomla's Global Configuration)
* - GMT
*
* @param JUser|null $user
*
* @return DateTimeZone
*/
public function getApplicableTimezone($user = null)
{
// If we have a forced timezone use it instead of trying to figure anything out.
if (is_object($this->forcedTimezone))
{
return $this->forcedTimezone;
}
// No user? Get the current user.
if (is_null($user))
{
$user = $this->container->platform->getUser();
}
// If there is a cached timezone return that instead.
if (isset($this->userToTimezone[$user->id]))
{
return $this->userToTimezone[$user->id];
}
// Prefer the user timezone if it's set.
if (!$user->guest)
{
$tz = $user->getParam('timezone', null);
if (!empty($tz))
{
try
{
$this->userToTimezone[$user->id] = new DateTimeZone($tz);
return $this->userToTimezone[$user->id];
}
catch (Exception $e)
{
}
}
}
// Get the Server Timezone from Global Configuration with a fallback to GMT
$tz = $this->container->platform->getConfig()->get('offset', 'GMT');
try
{
$this->userToTimezone[$user->id] = new DateTimeZone($tz);
}
catch (Exception $e)
{
// If an invalid timezone was set we get to use GMT
$this->userToTimezone[$user->id] = new DateTimeZone('GMT');
}
return $this->userToTimezone[$user->id];
}
/**
* Returns a FOF Date object with its timezone set to the user's applicable timezone.
*
* If no user is specified the current user will be used.
*
* $time can be a DateTime object (including Date and JDate), an integer (UNIX timestamp) or a date string. If no
* timezone is specified in a date string we assume it's GMT.
*
* @param JUser $user Applicable user for timezone calculation. Null = current user.
* @param mixed $time Source time. Leave blank for current date/time.
*
* @return Date
*/
public function getLocalDateTime($user, $time = null)
{
$time = empty($time) ? 'now' : $time;
$date = new Date($time);
$tz = $this->getApplicableTimezone($user);
$date->setTimezone($tz);
return $date;
}
/**
* Returns a FOF Date object with its timezone set to GMT.
*
* If no user is specified the current user will be used.
*
* $time can be a DateTime object (including Date and JDate), an integer (UNIX timestamp) or a date string. If no
* timezone is specified in a date string we assume it's the user's applicable timezone.
*
* @param JUser $user
* @param mixed $time
*
* @return Date
*/
public function getGMTDateTime($user, $time)
{
$time = empty($time) ? 'now' : $time;
$tz = $this->getApplicableTimezone($user);
$date = new Date($time, $tz);
$gmtTimezone = new DateTimeZone('GMT');
$date->setTimezone($gmtTimezone);
return $date;
}
/**
* Returns a formatted date string in the user's applicable timezone.
*
* If no format is specified we will use $defaultFormat.
*
* If no user is specified the current user will be used.
*
* $time can be a DateTime object (including Date and JDate), an integer (UNIX timestamp) or a date string. If no
* timezone is specified in a date string we assume it's GMT.
*
* $translate requires you to have loaded the relevant translation file (e.g. en-GB.ini). JApplicationCms does that
* for you automatically. If you're under CLI, a custom JApplicationWeb etc you will probably have to load this file
* manually.
*
* @param string|null $format Timestamp format. If empty $defaultFormat is used.
* @param JUser|null $user Applicable user for timezone calculation. Null = current user.
* @param DateTime|Date|string|int|null $time Source time. Leave blank for current date/time.
* @param bool $translate Translate day of week and month names?
*
* @return string
*/
public function getLocalTimeStamp($format = null, $user = null, $time = null, $translate = false)
{
$date = $this->getLocalDateTime($user, $time);
$format = empty($format) ? $this->defaultFormat : $format;
return $date->format($format, true, $translate);
}
/**
* Returns a formatted date string in the GMT timezone.
*
* If no format is specified we will use $defaultFormat.
*
* If no user is specified the current user will be used.
*
* $time can be a DateTime object (including Date and JDate), an integer (UNIX timestamp) or a date string. If no
* timezone is specified in a date string we assume it's the user's applicable timezone.
*
* $translate requires you to have loaded the relevant translation file (e.g. en-GB.ini). JApplicationCms does that
* for you automatically. If you're under CLI, a custom JApplicationWeb etc you will probably have to load this file
* manually.
*
* @param string|null $format Timestamp format. If empty $defaultFormat is used.
* @param JUser|null $user Applicable user for timezone calculation. Null = current user.
* @param DateTime|Date|string|int|null $time Source time. Leave blank for current date/time.
* @param bool $translate Translate day of week and month names?
*
* @return string
*/
public function getGMTTimeStamp($format = null, $user = null, $time = null, $translate = false)
{
$date = $this->localToGMT($user, $time);
$format = empty($format) ? $this->defaultFormat : $format;
return $date->format($format, true, $translate);
}
/**
* Convert a local time back to GMT. Returns a Date object with its timezone set to GMT.
*
* This is an alias to getGMTDateTime
*
* @param string|Date $time
* @param JUser|null $user
*
* @return Date
*/
public function localToGMT($time, $user = null)
{
return $this->getGMTDateTime($user, $time);
}
/**
* Convert a GMT time to local timezone. Returns a Date object with its timezone set to the applicable user's TZ.
*
* This is an alias to getLocalDateTime
*
* @param string|Date $time
* @param JUser|null $user
*
* @return Date
*/
public function GMTToLocal($time, $user = null)
{
return $this->getLocalDateTime($user, $time);
}
}
Mini Shell