vendor/symfony/form/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.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\Extension\Core\ChoiceList\ChoiceListInterface;
  15 use Symfony\Component\Form\DataTransformerInterface;
  16 use Symfony\Component\Form\Exception\TransformationFailedException;
  17
  18 /**
  19  * @author Bernhard Schussek <bschussek@gmail.com>
  20  */
  21 class ChoicesToBooleanArrayTransformer implements DataTransformerInterface
  22 {
  23     private $choiceList;
  24
  25     public function __construct(ChoiceListInterface $choiceList)
  26     {
  27         $this->choiceList = $choiceList;
  28     }
  29
  30     /**
  31      * Transforms an array of choices to a format appropriate for the nested
  32      * checkboxes/radio buttons.
  33      *
  34      * The result is an array with the options as keys and true/false as values,
  35      * depending on whether a given option is selected. If this field is rendered
  36      * as select tag, the value is not modified.
  37      *
  38      * @param mixed $array An array
  39      *
  40      * @return mixed An array
  41      *
  42      * @throws TransformationFailedException If the given value is not an array
  43      *                                       or if the choices can not be retrieved.
  44      */
  45     public function transform($array)
  46     {
  47         if (null === $array) {
  48             return array();
  49         }
  50
  51         if (!is_array($array)) {
  52             throw new TransformationFailedException('Expected an array.');
  53         }
  54
  55         try {
  56             $values = $this->choiceList->getValues();
  57         } catch (\Exception $e) {
  58             throw new TransformationFailedException('Can not get the choice list', $e->getCode(), $e);
  59         }
  60
  61         $indexMap = array_flip($this->choiceList->getIndicesForChoices($array));
  62
  63         foreach ($values as $i => $value) {
  64             $values[$i] = isset($indexMap[$i]);
  65         }
  66
  67         return $values;
  68     }
  69
  70     /**
  71      * Transforms a checkbox/radio button array to an array of choices.
  72      *
  73      * The input value is an array with the choices as keys and true/false as
  74      * values, depending on whether a given choice is selected. The output
  75      * is an array with the selected choices.
  76      *
  77      * @param mixed $values An array
  78      *
  79      * @return mixed An array
  80      *
  81      * @throws TransformationFailedException If the given value is not an array,
  82      *                                       if the recuperation of the choices
  83      *                                       fails or if some choice can't be
  84      *                                       found.
  85      */
  86     public function reverseTransform($values)
  87     {
  88         if (!is_array($values)) {
  89             throw new TransformationFailedException('Expected an array.');
  90         }
  91
  92         try {
  93             $choices = $this->choiceList->getChoices();
  94         } catch (\Exception $e) {
  95             throw new TransformationFailedException('Can not get the choice list', $e->getCode(), $e);
  96         }
  97
  98         $result = array();
  99         $unknown = array();
 100
 101         foreach ($values as $i => $selected) {
 102             if ($selected) {
 103                 if (isset($choices[$i])) {
 104                     $result[] = $choices[$i];
 105                 } else {
 106                     $unknown[] = $i;
 107                 }
 108             }
 109         }
 110
 111         if (count($unknown) > 0) {
 112             throw new TransformationFailedException(sprintf('The choices "%s" were not found', implode('", "', $unknown)));
 113         }
 114
 115         return $result;
 116     }
 117 }