Twig integration

Add an optional Twig integration to have an extension for enum labels.

composer.json

@@ -17,8 +17,12 @@
     "require-dev": {
         "phpunit/phpunit": "^4.1",
         "sllh/php-cs-fixer-styleci-bridge": "^2.0",
+        "symfony/config": "^2.7 || ^3.0",
+        "symfony/dependency-injection": "^2.7 || ^3.0",
         "symfony/form": "^2.7 || ^3.0",
-        "symfony/validator": "^2.7 || ^3.0"
+        "symfony/twig-bundle": "^2.7 || ^3.0",
+        "symfony/validator": "^2.7 || ^3.0",
+        "twig/twig": "^1.24"
     },
     "suggest": {
         "symfony/form": "To use enum form type",

src/Bridge/Symfony/Bundle/Greg0ireEnumBundle.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Greg0ire\Enum\Bridge\Symfony\Bundle;
+
+use Greg0ire\Enum\Bridge\Symfony\DependencyInjection\Greg0ireEnumExtension;
+use Symfony\Component\HttpKernel\Bundle\Bundle;
+
+/**
+ * @author Sullivan Senechal <[email protected]>
+ */
+final class Greg0ireEnumBundle extends Bundle
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function getContainerExtensionClass()
+    {
+        return Greg0ireEnumExtension::class;
+    }
+}

src/Bridge/Symfony/DependencyInjection/Greg0ireEnumExtension.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Greg0ire\Enum\Bridge\Symfony\DependencyInjection;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+
+/**
+ * @author Sullivan Senechal <[email protected]>
+ */
+final class Greg0ireEnumExtension extends Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
+
+        if (class_exists(\Twig_Extension::class)) {
+            $loader->load('twig.xml');
+        }
+    }
+}

src/Bridge/Symfony/Resources/config/twig.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+
+<container xmlns="http://symfony.com/schema/dic/services"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+    <services>
+        <service id="greg0ire_enum.twig.extension.enum" class="Greg0ire\Enum\Bridge\Twig\Extension\EnumExtension">
+            <tag name="twig.extension"/>
+        </service>
+    </services>
+</container>

src/Bridge/Twig/Extension/EnumExtension.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Greg0ire\Enum\Bridge\Twig\Extension;
+
+/**
+ * @author Sullivan Senechal <[email protected]>
+ */
+final class EnumExtension extends \Twig_Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getFilters()
+    {
+        return [
+            new \Twig_SimpleFilter('enum_label', [$this, 'label']),
+        ];
+    }
+
+    /**
+     * @param mixed  $value
+     * @param string $class           The enum class name
+     * @param bool   $prefixWithClass Prefix key with class name if true
+     *
+     * @return string
+     */
+    public function label($value, $class, $prefixWithClass = false)
+    {
+        $constants = call_user_func([$class, 'getConstants'], 'strtolower', $prefixWithClass);
+
+        return array_search($value, $constants);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'greg0ire_enum';
+    }
+}