<?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 ChoiceToBooleanArrayTransformer implements DataTransformerInterface { private $choiceList; private $placeholderPresent; /** * Constructor. * * @param ChoiceListInterface $choiceList * @param Boolean $placeholderPresent */ public function __construct(ChoiceListInterface $choiceList, $placeholderPresent) { $this->choiceList = $choiceList; $this->placeholderPresent = $placeholderPresent; } /** * Transforms a single choice 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 $choice An array if "multiple" is set to true, a scalar * value otherwise. * * @return mixed An array * * @throws TransformationFailedException If the given value is not scalar or * if the choices can not be retrieved. */ public function transform($choice) { 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($choice))); foreach ($values as $i => $value) { $values[$i] = isset($valueMap[$value]); } if ($this->placeholderPresent) { $values['placeholder'] = 0 === count($valueMap); } return $values; } /** * Transforms a checkbox/radio button array to a single choice. * * 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 the selected choice. * * @param array $values An array of values * * @return mixed A scalar value * * @throws TransformationFailedException If the given value is not an array, * if the recuperation of the choices * fails or if some choice can't be * found. */ public function reverseTransform($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(), $e); } foreach ($values as $i => $selected) { if ($selected) { if (isset($choices[$i])) { return $choices[$i] === '' ? null : $choices[$i]; } elseif ($this->placeholderPresent && 'placeholder' === $i) { return null; } else { throw new TransformationFailedException(sprintf('The choice "%s" does not exist', $i)); } } } return null; } }