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/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie;
/**
* Localizes DateTime instances.
*/
class DateTimeLocalizer
{
const DEFAULT_LOCALE = 'en';
/**
* DateTime localizer.
*
* @var callable
*/
static private $localizer;
/**
* Defines the localizer.
*
* @param callable $localizer
*
* @return callable The previous localizer, or `null` if none was defined.
*/
static public function define(callable $localizer)
{
$previous = self::$localizer;
self::$localizer = $localizer;
return $previous;
}
/**
* Returns the current localizer.
*
* @return callable|null
*/
static public function defined()
{
return self::$localizer;
}
/**
* Undefine the localizer.
*/
static public function undefine()
{
self::$localizer = null;
}
/**
* Localize a {@link DateTime} instance.
*
* @param DateTime $datetime
* @param string $locale
*
* @return callable
*/
static public function localize(DateTime $datetime, $locale = self::DEFAULT_LOCALE)
{
$provider = self::$localizer;
if (!$provider)
{
throw new \LogicException("No localizer is defined yet. Please define one with `DateTimeLocalizer::define(\$localizer)`.");
}
return $provider($datetime, $locale);
}
}