public function createComponentPostForm()
    {
        $form = new Form();
        $form->addHidden('id', empty($this->post) ? NULL : $this->post->getId());
        $form->addText('name', 'Název:')
            ->setRequired('Zadejte název');
        $form->addText('excerpt', 'Výňatek:');
        $form->addText('url', 'URL:')
            ->setRequired('Zadejte url (post-url)');
        $form->addTextArea('body', 'Obsah:');
        $form->addSelect('public', 'Publikovat:')
            ->setDefaultValue(TRUE);
        $form->addSelect('categories', 'Kategorie:', $this->categoryRepository->getCategoriesSelect())
            ->setRequired('Musíte vybrat kategorii');
        $form->addUpload('image', 'Obrázek:')
            ->addCondition(FORM::IMAGE)
            ->addRule(FORM::MIME_TYPE, 'Soubor musí být obrázek typu JPEG, JPG, PNG', ['image/jpeg', 'image/png', 'image/jpg']);
        $form->addSubmit('send', 'Odeslat');

        if(!empty($this->post))
        {
            $form->setDefaults([
                'name'          =>  $this->post->getName(),
                'excerpt'       =>  $this->post->getExcerpt(),
                'url'           =>  $this->post->getUrl(),
                'body'          =>  $this->post->getBody(),
                'categories'    =>  $this->post->getCategories()->getId(),
                'public'        =>  $this->post->isPublic(),
            ]);
        } else {
            $form->setDefaults([
                 'created_at'   =>  new \DateTime()
            ]);
        }
        $form->onSuccess[] = [$this, 'postFormSucceeded'];
        return $form;
    }