Made forum posting possible.

It has some limitations, though, as
ForumTopic.last_post and ForumTopicGroup.last_post is not updated
automagically...

src/KekRozsak/FrontBundle/Form/Type/ForumPostType.php

@@ -0,0 +1,47 @@
+<?php
+namespace KekRozsak\FrontBundle\Form\Type;
+
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\FormBuilderInterface;
+
+class ForumPostType extends AbstractType
+{
+	private $topicGroup;
+	private $topic;
+
+	public function __construct($topicGroup = null, $topic = null)
+	{
+		$this->topicGroup = $topicGroup;
+		$this->topic = $topic;
+	}
+
+	public function buildForm(FormBuilderInterface $builder, array $options)
+	{
+		$builder->add('created_at', 'hidden', array(
+			'label' => 'Időpont',
+			'data'  => new \DateTime('now')
+		));
+		$builder->add('text', null, array(
+			'label' => ' ',
+		));
+		$builder->add('topic', 'hidden', array(
+			'property_path' => false,
+			'data'          => $this->topic,
+		));
+	}
+
+	public function getName()
+	{
+		return 'forum_post';
+	}
+
+	public function getDefaultOptions()
+	{
+		$opts = array(
+			'data_class' => 'KekRozsak\FrontBundle\Entity\ForumPost',
+		);
+
+		return $opts;
+	}
+}
+