chill-bundles/docs/source/development/render-entity.rst

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Rendering entity automatically
##############################
Some entity need to be rendered automatically for a couple of times: a person, a user, ...
One can use some twig filter to render those entities:
.. code-block:: twig
{{ person|chill_entity_render_box }}
Define a renderer
=================
By default, the object passed through the renderer will be rendered using the :code:`__toString()` method. To customize this behaviour, you have to define a service and tag it using :code:`chill.render_entity`.
The rendered is implemented using :class:`Chill\MainBundle\Templating\Entity\ChillEntityRenderInterface`. This interface has 3 methods:
* :code:`public function supports($entity, array $options): bool`: return true if the :code:`$entity` given in parameter, with custom options, is supported by this renderer;
* :code:`public function renderString($entity, array $options): string`: render the entity as a single string, for instance in a select list;
* :code:`public function renderBox($entity, array $options): string`: render the entity in an html box.
.. warning::
The HTML returned by :code:`renderBox` **MUST BE SAFE** of any XSS injection.
:class:`Chill\MainBundle\Templating\Entity\AbstractChillEntityRender` provides some useful methods to get the opening and closing boxes that should be used.
Usage about rendering comment:
.. code-block:: php
namespace Chill\MainBundle\Templating\Entity;
use Chill\MainBundle\Entity\Embeddable\CommentEmbeddable;
use Chill\MainBundle\Repository\UserRepository;
use Chill\MainBundle\Templating\Entity\AbstractChillEntityRender;
use Symfony\Component\Templating\EngineInterface;
class CommentRender extends AbstractChillEntityRender
{
/**
* @var \Chill\MainBundle\Repository\UserRepository
*/
private $userRepository;
/**
*
* @var EngineInterface
*/
private $engine;
public function __construct(
UserRepository $userRepository,
EngineInterface $engine
) {
$this->userRepository = $userRepository;
$this->engine = $engine;
}
/**
* @param CommentEmbeddable $entity
* @param array $options
*
* @return string
*/
public function renderBox($entity, array $options): string
{
// default options
$options = \array_merge([
'user' => [],
'disable_markdown' => false,
'limit_lines' => null,
'metadata' => true
], $options);
if ($entity->getUserId()) {
$user = $this->userRepository->find($entity->getUserId());
}
return $this->engine
->render(
'@ChillMain/Entity/CommentEmbeddable.html.twig',
[
'opening_box' => $this->getDefaultOpeningBox('comment-embeddable'),
'closing_box' => $this->getDefaultClosingBox(),
'user' => $user ?? NULL,
'comment' => $entity,
'options' => $options
]
);
}
/**
* @param CommentEmbeddable $entity
* @param array $options
*
* @return string
*/
public function renderString($entity, array $options): string
{
return $entity->getComment();
}
public function supports($entity, array $options): bool
{
return $entity instanceof CommentEmbeddable;
}
}
Logic inside the template:
.. code-block:: twig
{{ opening_box|raw }}
<div>
{# logic for rendering #}
</div>
{{ closing_box|raw }}
Usage in templates
==================
For rendering entity as a box:
.. code-block:: twig
{{ entity|chill_entity_render_box }}
For rendering entity as a string:
.. code-block:: twig
{{ entity|chill_entity_render_string }}
Available renderer and options
==============================
:code:`Person` (Person Bundle)
------------------------------
* no options
:code:`CommentEmbeddable` (Main Bundle)
---------------------------------------
Options:
* :code:`user`: options which will be passed to "user" renderer
* :code:`disable_markdown`: disable markdown renderer, default to :code:`FALSE`
* :code:`limit_lines` (integer) limit the number of lines. Default to :code:`NULL`. May be an integer.
* :code:`metadata` (boolean): show the last updating user and last updating date. Default to :code:`TRUE`.