first draft

src/AppBundle/Form/CommentType.php

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+<?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 AppBundle\Form;
+
+use AppBundle\Entity\Comment;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+/**
+ * FIXME CAN BE REMOVED
+ *
+ * Defines the form used to create and manipulate blog comments. Although in this
+ * case the form is trivial and we could build it inside the controller, a good
+ * practice is to always define your forms as classes.
+ * See http://symfony.com/doc/current/book/forms.html#creating-form-classes
+ *
+ * @author Ryan Weaver <weaverryan@gmail.com>
+ * @author Javier Eguiluz <javier.eguiluz@gmail.com>
+ */
+class CommentType extends AbstractType
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function buildForm(FormBuilderInterface $builder, array $options)
+    {
+        // By default, form fields include the 'required' attribute, which enables
+        // the client-side form validation. This means that you can't test the
+        // server-side validation errors from the browser. To temporarily disable
+        // this validation, set the 'required' attribute to 'false':
+        //
+        //     $builder->add('content', null, ['required' => false]);
+
+        $builder
+            ->add('content')
+        ;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function configureOptions(OptionsResolver $resolver)
+    {
+        $resolver->setDefaults([
+            'data_class' => Comment::class,
+        ]);
+    }
+}

src/AppBundle/Form/PostType.php

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+<?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 AppBundle\Form;
+
+use AppBundle\Entity\Post;
+use AppBundle\Form\Type\DateTimePickerType;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\TextareaType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+/**
+ * FIXME CAN BE REMOVED
+ *
+ * Defines the form used to create and manipulate blog posts.
+ *
+ * @author Ryan Weaver <weaverryan@gmail.com>
+ * @author Javier Eguiluz <javier.eguiluz@gmail.com>
+ */
+class PostType extends AbstractType
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function buildForm(FormBuilderInterface $builder, array $options)
+    {
+        // For the full reference of options defined by each form field type
+        // see http://symfony.com/doc/current/reference/forms/types.html
+
+        // By default, form fields include the 'required' attribute, which enables
+        // the client-side form validation. This means that you can't test the
+        // server-side validation errors from the browser. To temporarily disable
+        // this validation, set the 'required' attribute to 'false':
+        //
+        //     $builder->add('title', null, ['required' => false, ...]);
+
+        $builder
+            ->add('title', null, [
+                'attr' => ['autofocus' => true],
+                'label' => 'label.title',
+            ])
+            ->add('summary', TextareaType::class, [
+                'label' => 'label.summary',
+            ])
+            ->add('content', null, [
+                'attr' => ['rows' => 20],
+                'label' => 'label.content',
+            ])
+            ->add('authorEmail', null, [
+                'label' => 'label.author_email',
+            ])
+            ->add('publishedAt', DateTimePickerType::class, [
+                'label' => 'label.published_at',
+            ])
+        ;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function configureOptions(OptionsResolver $resolver)
+    {
+        $resolver->setDefaults([
+            'data_class' => Post::class,
+        ]);
+    }
+}

src/AppBundle/Form/Type/DateTimePickerType.php

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+<?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 AppBundle\Form\Type;
+
+use AppBundle\Utils\MomentFormatConverter;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\DateTimeType;
+use Symfony\Component\Form\FormInterface;
+use Symfony\Component\Form\FormView;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+/**
+ * Defines the custom form field type used to manipulate datetime values across
+ * Bootstrap Date\Time Picker javascript plugin.
+ * See http://symfony.com/doc/current/cookbook/form/create_custom_field_type.html
+ *
+ * @author Yonel Ceruto <yonelceruto@gmail.com>
+ */
+class DateTimePickerType extends AbstractType
+{
+    /**
+     * @var MomentFormatConverter
+     */
+    private $formatConverter;
+
+    public function __construct()
+    {
+        $this->formatConverter = new MomentFormatConverter();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function buildView(FormView $view, FormInterface $form, array $options)
+    {
+        $view->vars['attr']['data-date-format'] = $this->formatConverter->convert($options['format']);
+        $view->vars['attr']['data-date-locale'] = \Locale::getDefault();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function configureOptions(OptionsResolver $resolver)
+    {
+        $resolver->setDefaults([
+            'widget' => 'single_text',
+        ]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getParent()
+    {
+        return DateTimeType::class;
+    }
+}