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DateTimeZoneToStringTransformer.php
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DateTimeZoneToStringTransformer.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Form\Extension\Core\DataTransformer;
use Symfony\Component\Form\DataTransformerInterface;
use Symfony\Component\Form\Exception\TransformationFailedException;
/**
* Transforms between a timezone identifier string and a DateTimeZone object.
*
* @author Roland Franssen <franssen.roland@gmail.com>
*/
class DateTimeZoneToStringTransformer implements DataTransformerInterface
{
private $multiple;
public function __construct(bool $multiple = false)
{
$this->multiple = $multiple;
}
/**
* {@inheritdoc}
*/
public function transform($dateTimeZone)
{
if (null === $dateTimeZone) {
return;
}
if ($this->multiple) {
if (!\is_array($dateTimeZone)) {
throw new TransformationFailedException('Expected an array of \DateTimeZone objects.');
}
return array_map([new self(), 'transform'], $dateTimeZone);
}
if (!$dateTimeZone instanceof \DateTimeZone) {
throw new TransformationFailedException('Expected a \DateTimeZone object.');
}
return $dateTimeZone->getName();
}
/**
* {@inheritdoc}
*/
public function reverseTransform($value)
{
if (null === $value) {
return;
}
if ($this->multiple) {
if (!\is_array($value)) {
throw new TransformationFailedException('Expected an array of timezone identifier strings.');
}
return array_map([new self(), 'reverseTransform'], $value);
}
if (!\is_string($value)) {
throw new TransformationFailedException('Expected a timezone identifier string.');
}
try {
return new \DateTimeZone($value);
} catch (\Exception $e) {
throw new TransformationFailedException($e->getMessage(), $e->getCode(), $e);
}
}
}