How to include user info in yaml menu in symfony2? - symfony

Question

I am currently developping using symfony2 and using FOSUserBundle for user management.
I built a menus.yml config file to separate html from menu structure. Basicaly I import menus.yml in my config.yml file and it's added to twig's global vars. Here's a look at my menus.yml (Abridged version)
twig:
globals:
menus:
loggedin:
topleft:
-
path: ~
caption: Réseau
icon: glyphicon-comment
submenu:
-
path: nouvelles
caption: Fil de nouvelles
icon: glyphicon-globe
topright:
-
path: ~
caption: "{{ app.user.prenom }} {{ app.user.nom }}"
icon: glyphicon-user
Then, in my template html file, I render the menu using this
{% for m in menus.loggedin.topleft %}
<li class="dropdown">
{{ m.caption }}
<ul class="dropdown-menu">
{% for item in m.submenu %}
<li>{{item.caption}}</li>
{% if item.seperator is defined and item.seperator == true %}
<li class="divider"></li>
{% endif %}
{% endfor %}
</ul>
</li>
{% endfor %}
But I am unable to display the user's first name and last name as the textual value gets printed as is into the html page. I tried hooking the app.user into caption like this
caption: %app.user.prenom% %app.user.nom%
But it doesn't work, saying the value doesn't exist (yet?)
Anybody has a clue how I can work this around?

Answer 1

I looked for an equivalent of the eval() PHP or Javascript function in Twig and found this SO question: Twig variables in twig variable.
Here is the code from an answer by Berry Langerak which define a Twig filter:
<?php
/**
* A twig extension that will add an "evaluate" filter, for dynamic evaluation.
*/
class EvaluateExtension extends \Twig_Extension {
/**
* Attaches the innervars filter to the Twig Environment.
*
* #return array
*/
public function getFilters( ) {
return array(
'evaluate' => new \Twig_Filter_Method( $this, 'evaluate', array(
'needs_environment' => true,
'needs_context' => true,
'is_safe' => array(
'evaluate' => true
)
))
);
}
/**
* This function will evaluate $string through the $environment, and return its results.
*
* #param array $context
* #param string $string
*/
public function evaluate( \Twig_Environment $environment, $context, $string ) {
$loader = $environment->getLoader( );
$parsed = $this->parseString( $environment, $context, $string );
$environment->setLoader( $loader );
return $parsed;
}
/**
* Sets the parser for the environment to Twig_Loader_String, and parsed the string $string.
*
* #param \Twig_Environment $environment
* #param array $context
* #param string $string
* #return string
*/
protected function parseString( \Twig_Environment $environment, $context, $string ) {
$environment->setLoader( new \Twig_Loader_String( ) );
return $environment->render( $string, $context );
}
/**
* Returns the name of this extension.
*
* #return string
*/
public function getName( ) {
return 'evaluate';
}
}
Example usage:
$twig_environment->addExtension( new EvaluateExtension( ) );
Use it in the template:
{% set var = 'inner variable' %}
{{'this is a string with an {{var}}'|evaluate}}