Parse TWIG strings to add before punctuation markers - regex

Question

I search a way to parse strings in TWIG.
I have a translation file: messages.fr.yml and I call strings like that: {{ 'bloc.name'|trans() | raw }}.
In french, before some punctuation markers there is a space. The problem is when the sentence is cut between the end ant the marker. So I want to replace each space before these markers: [ ? , ! , ; , : ] by .
I though about a solution which could use autoescape + regex but I do not know how can I do that and if it is the best way to do. Someone has an idea?
Thank you for your help!

Answer 1

You are looking for : how to create your own Twig Filter.
It is possible with a Twig Extension : http://symfony.com/doc/current/cookbook/templating/twig_extension.html
// src/AppBundle/Twig/AppExtension.php
namespace AppBundle\Twig;
class AppExtension extends \Twig_Extension
{
public function getFilters()
{
return array(
new \Twig_SimpleFilter('nbspace', array($this, 'nbspace'))
);
}
public function nbspace($sentence)
{
return preg_replace('/ ([\?!;:])/',' $1',$sentence);
}
public function getName()
{
return 'app_extension';
}
}
Then you have to enable this filter in services.yml like this :
# app/config/services.yml
services:
app.twig_extension:
class: AppBundle\Twig\AppExtension
public: false
tags:
- { name: twig.extension }
To use it :
{{ 'bloc.name'|trans() | nbspace | raw }}
No need to change the autoescaping stategy in your use case.
If you want to avoid the 'raw' filter, you can also specify that your filter returns something 'safe for html' :
new \Twig_SimpleFilter('nbspace', array($this, 'nbspace'), array('is_safe'=>array('html')))