src/Wallabag/CoreBundle/Form/DataTransformer/StringToListTransformer.php

   1 <?php
   2
   3 namespace Wallabag\CoreBundle\Form\DataTransformer;
   4
   5 use Doctrine\Common\Persistence\ObjectManager;
   6 use Symfony\Component\Form\DataTransformerInterface;
   7 use Symfony\Component\Form\Exception\TransformationFailedException;
   8
   9 class StringToListTransformer implements DataTransformerInterface
  10 {
  11     private $separator;
  12
  13     public function __construct($separator = ',')
  14     {
  15         $this->separator = $separator;
  16     }
  17
  18     /**
  19      * Transforms a list to a string.
  20      *
  21      * @param array|null $list
  22      *
  23      * @return string
  24      */
  25     public function transform($list)
  26     {
  27         if (null === $list) {
  28             return '';
  29         }
  30
  31         return implode($this->separator, $list);
  32     }
  33
  34     /**
  35      * Transforms a string to a list.
  36      *
  37      * @param  string $string
  38      *
  39      * @return array|null
  40      */
  41     public function reverseTransform($string)
  42     {
  43         if (!$string) {
  44             return null;
  45         }
  46
  47         return array_filter(array_map('trim', explode($this->separator, $string)));
  48     }
  49 }