Add a form to create tagging rules

src/Wallabag/CoreBundle/Form/DataTransformer/StringToListTransformer.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace Wallabag\CoreBundle\Form\DataTransformer;
+
+use Doctrine\Common\Persistence\ObjectManager;
+use Symfony\Component\Form\DataTransformerInterface;
+use Symfony\Component\Form\Exception\TransformationFailedException;
+
+class StringToListTransformer implements DataTransformerInterface
+{
+    private $separator;
+
+    public function __construct($separator = ',')
+    {
+        $this->separator = $separator;
+    }
+
+    /**
+     * Transforms a list to a string.
+     *
+     * @param array|null $list
+     *
+     * @return string
+     */
+    public function transform($list)
+    {
+        if (null === $list) {
+            return '';
+        }
+
+        return implode($this->separator, $list);
+    }
+
+    /**
+     * Transforms a string to a list.
+     *
+     * @param  string $string
+     *
+     * @return array|null
+     */
+    public function reverseTransform($string)
+    {
+        if (!$string) {
+            return null;
+        }
+
+        return array_filter(array_map('trim', explode($this->separator, $string)));
+    }
+}

src/Wallabag/CoreBundle/Form/Type/TaggingRuleType.php

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+<?php
+
+namespace Wallabag\CoreBundle\Form\Type;
+
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+use Wallabag\CoreBundle\Form\DataTransformer\StringToListTransformer;
+
+class TaggingRuleType extends AbstractType
+{
+    public function buildForm(FormBuilderInterface $builder, array $options)
+    {
+        $builder
+            ->add('rule', 'text', array('required' => true))
+            ->add('save', 'submit')
+        ;
+
+        $tagsField = $builder
+            ->create('tags', 'text')
+            ->addModelTransformer(new StringToListTransformer(','));
+
+        $builder->add($tagsField);
+    }
+
+    public function configureOptions(OptionsResolver $resolver)
+    {
+        $resolver->setDefaults(array(
+            'data_class' => 'Wallabag\CoreBundle\Entity\TaggingRule',
+        ));
+    }
+
+    public function getName()
+    {
+        return 'tagging_rule';
+    }
+}