<?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\Extension\Core\ChoiceList\ChoiceListInterface; use Symfony\Component\Form\DataTransformerInterface; use Symfony\Component\Form\Exception\TransformationFailedException; /** * @author Bernhard Schussek <bschussek@gmail.com> */ class ChoicesToBooleanArrayTransformer implements DataTransformerInterface { private $choiceList; public function __construct(ChoiceListInterface $choiceList) { $this->choiceList = $choiceList; } /** * Transforms an array of choices to a format appropriate for the nested * checkboxes/radio buttons. * * The result is an array with the options as keys and true/false as values, * depending on whether a given option is selected. If this field is rendered * as select tag, the value is not modified. * * @param mixed $array An array * * @return mixed An array * * @throws TransformationFailedException If the given value is not an array * or if the choices can not be retrieved. */ public function transform($array) { if (null === $array) { return array(); } if (!is_array($array)) { throw new TransformationFailedException('Expected an array.'); } try { $values = $this->choiceList->getValues(); } catch (\Exception $e) { throw new TransformationFailedException('Can not get the choice list', $e->getCode(), $e); } $valueMap = array_flip($this->choiceList->getValuesForChoices($array)); foreach ($values as $i => $value) { $values[$i] = isset($valueMap[$value]); } return $values; } /** * Transforms a checkbox/radio button array to an array of choices. * * The input value is an array with the choices as keys and true/false as * values, depending on whether a given choice is selected. The output * is an array with the selected choices. * * @param mixed $values An array * * @return mixed An array * * @throws TransformationFailedException If the given value is not an array, * if the recuperation of the choices * fails or if some choice can't be * found. */ public function reverseTransform($values) { if (!is_array($values)) { throw new TransformationFailedException('Expected an array.'); } try { $choices = $this->choiceList->getChoices(); } catch (\Exception $e) { throw new TransformationFailedException('Can not get the choice list', $e->getCode(), $e); } $result = array(); $unknown = array(); foreach ($values as $i => $selected) { if ($selected) { if (isset($choices[$i])) { $result[] = $choices[$i]; } else { $unknown[] = $i; } } } if (count($unknown) > 0) { throw new TransformationFailedException(sprintf('The choices "%s" were not found', implode('", "', $unknown))); } return $result; } }