From 4f5b44bd3bd490309eb2ba7b44df4769816ba729 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20L=C5=93uillet?= <nicolas.loeuillet@gmail.com>
Date: Sat, 3 Aug 2013 19:26:54 +0200
Subject: twig implementation

---
 .../ChoicesToBooleanArrayTransformer.php           | 117 +++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 vendor/symfony/form/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php

(limited to 'vendor/symfony/form/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php')

diff --git a/vendor/symfony/form/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php b/vendor/symfony/form/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php
new file mode 100644
index 00000000..a13c0d4d
--- /dev/null
+++ b/vendor/symfony/form/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToBooleanArrayTransformer.php
@@ -0,0 +1,117 @@
+<?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);
+        }
+
+        $indexMap = array_flip($this->choiceList->getIndicesForChoices($array));
+
+        foreach ($values as $i => $value) {
+            $values[$i] = isset($indexMap[$i]);
+        }
+
+        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;
+    }
+}
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