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<?php
namespace Wallabag\CoreBundle\Form\DataTransformer;
use Symfony\Component\Form\DataTransformerInterface;
/**
* Transforms a comma-separated list to a proper PHP array.
* Example: the string "foo, bar" will become the array ["foo", "bar"].
*/
class StringToListTransformer implements DataTransformerInterface
{
/**
* @var string
*/
private $separator;
/**
* @param string $separator The separator used in the list.
*/
public function __construct($separator = ',')
{
$this->separator = $separator;
}
/**
* Transforms a list to a string.
*
* @param array|null $list
*
* @return string
*/
public function transform($list)
{
if (null === $list) {
return '';
}
return implode($this->separator, $list);
}
/**
* Transforms a string to a list.
*
* @param string $string
*
* @return array|null
*/
public function reverseTransform($string)
{
if ($string === null) {
return;
}
return array_values(array_filter(array_map('trim', explode($this->separator, $string))));
}
}
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