symfony - call a controller-action within a twig extention - php

Question

I'm trying to call a controller from a twig extention.
I do not want to call the controller as a service since I'd lose all the fancy shortcuts.
Want I want to achieve is to call the controller like twig do it when you do :
{{ render(controller(
'AppBundle:Article:recentArticles',
{ 'max': 3 }
)) }}
I looked at the sourcecode of the "render" and tried to find the "controller" twig's functions, but I did not managed to understand how to do.
From now I achieved an unsatisfying but functionnal code :
In my twig extention :
return $environment->render('FooBundle:TwigExtension/CmsExtension:cmsRenderHook.html.twig', [
'hook' => $hook,
]);
In the CmsExtension:cmsRenderHook.html.twig template :
{{ render(controller(hook.stringControllerAction, hook.arrayParameters)) }}
I think (maybe wrongly) that it would be faster to call it without the template step.
EDIT : I finally successed to code this :
$environment->getExtension('Symfony\Bridge\Twig\Extension\HttpKernelExtension')->renderFragment(
$environment->getExtension('Symfony\Bridge\Twig\Extension\HttpKernelExtension')->controller(
$hook['action'],
$hook['jsonParameters']
)
);
(I did a grep in twig's cache and reproduced it compiled version).
my only concern is about referring to Symfony\Bridge\Twig\Extension\HttpKernelExtension, i'd rather let twig handle this choice, but I can't find out how.
I have two questions:
- do you think that Symfony\Bridge\Twig\Extension\HttpKernelExtension is stable enought to refere explicitly to it?
- if not how would you do to let twig handle it?

Answer 1

You could also get the Twig_SimpleFunction from the Twig_Environment:
$renderFunction = $environment->getFunction('render'); // get the env via initRuntime(..) in your extension
$callable = $renderFunction->getCallable();
However, I would not recommend relying on Twig internals. You should probably extract the functionality into a service.