vendor/symfony/form/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php

   1 <?php
   2
   3 /*
   4  * This file is part of the Symfony package.
   5  *
   6  * (c) Fabien Potencier <fabien@symfony.com>
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Symfony\Component\Form\Extension\Core\DataTransformer;
  13
  14 use Symfony\Component\Form\DataTransformerInterface;
  15 use Symfony\Component\Form\Exception\TransformationFailedException;
  16
  17 /**
  18  * @author Bernhard Schussek <bschussek@gmail.com>
  19  */
  20 class ValueToDuplicatesTransformer implements DataTransformerInterface
  21 {
  22     private $keys;
  23
  24     public function __construct(array $keys)
  25     {
  26         $this->keys = $keys;
  27     }
  28
  29     /**
  30      * Duplicates the given value through the array.
  31      *
  32      * @param mixed $value The value
  33      *
  34      * @return array The array
  35      */
  36     public function transform($value)
  37     {
  38         $result = array();
  39
  40         foreach ($this->keys as $key) {
  41             $result[$key] = $value;
  42         }
  43
  44         return $result;
  45     }
  46
  47     /**
  48      * Extracts the duplicated value from an array.
  49      *
  50      * @param array $array
  51      *
  52      * @return mixed The value
  53      *
  54      * @throws TransformationFailedException If the given value is not an array or
  55      *                                       if the given array can not be transformed.
  56      */
  57     public function reverseTransform($array)
  58     {
  59         if (!is_array($array)) {
  60             throw new TransformationFailedException('Expected an array.');
  61         }
  62
  63         $result = current($array);
  64         $emptyKeys = array();
  65
  66         foreach ($this->keys as $key) {
  67             if (!empty($array[$key])) {
  68                 if ($array[$key] !== $result) {
  69                     throw new TransformationFailedException(
  70                         'All values in the array should be the same'
  71                     );
  72                 }
  73             } else {
  74                 $emptyKeys[] = $key;
  75             }
  76         }
  77
  78         if (count($emptyKeys) > 0) {
  79             if (count($emptyKeys) == count($this->keys)) {
  80                 // All keys empty
  81                 return null;
  82             }
  83
  84             throw new TransformationFailedException(
  85                  sprintf('The keys "%s" should not be empty', implode('", "', $emptyKeys)
  86             ));
  87         }
  88
  89         return $result;
  90     }
  91 }