Example of a Symfony (3) custom DataCollector

my_security.html.twig

{# AppBundle/Resources/views/my_security.html.twig #}
{% extends '@WebProfiler/Profiler/layout.html.twig' %}

{% block toolbar %}
    {% set icon %}
        <span class="icon" style="color: #AAA; margin-right: 3px;">
            {# svp de l'icône lock open de Font-awesome #}
            <svg aria-hidden="true" data-prefix="fas" data-icon="lock-open" class="svg-inline--fa fa-lock-open fa-w-18" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><path fill="currentColor" d="M423.5 0C339.5.3 272 69.5 272 153.5V224H48c-26.5 0-48 21.5-48 48v192c0 26.5 21.5 48 48 48h352c26.5 0 48-21.5 48-48V272c0-26.5-21.5-48-48-48h-48v-71.1c0-39.6 31.7-72.5 71.3-72.9 40-.4 72.7 32.1 72.7 72v80c0 13.3 10.7 24 24 24h32c13.3 0 24-10.7 24-24v-80C576 68 507.5-.3 423.5 0z"></path></svg>
        </span>
        <span class="sf-toolbar-value">{% if collector.currentSecurity %}@Security{% else %}Pas de sécurité{% endif %}</span>
    {% endset %}

    {% set text %}
        <div class="sf-toolbar-info-piece">
            {# Pas utilisé ici, utile pour rajouter un texte qui s'affichera lorsqu'on passe le curseur sur la toolbar #}
        </div>
    {% endset %}

    {{ include('@WebProfiler/Profiler/toolbar_item.html.twig', { 'link': true }) }}
{% endblock %}

{% block menu %}
    <span class="label">
        <strong>@Security</strong>
    </span>
{% endblock %}

{% block panel %}
    <h2>@Security</h2>

    <p>Le contrôleur courant a la règle suivante:</p>
    <pre><code>
        @Security("{{ collector.currentSecurity }}")
    </code></pre>
{% endblock %}

MySecurityDataCollector.php

<?php

namespace AppBundle\DataCollector;

use Doctrine\Common\Annotations\AnnotationReader;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Security;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\DataCollector\DataCollector;

class MySecurityDataCollector extends DataCollector
{
    public function collect(Request $request, Response $response, \Exception $exception = null)
    {
        // On peut collecter des informations sur la requête en cours,
        // dans cet exemple basique je veux savoir quelle est l'action appelée pour récupérer plus tard son annotation
        $this->data['current_controller'] = $request->attributes->get('_controller');
    }

    public function getCurrentSecurity()
    {
        if (!$this->data['current_controller']) {
            return null;
        }

        $params = explode('::', $this->data['current_controller']);

        if (2 !== count($params)) {
            return null;
        }

        $method = new \ReflectionMethod($params[0], $params[1]);

        $annotationReader = new AnnotationReader();
        $annotation = $annotationReader->getMethodAnnotation($method, Security::class);

        if (!$annotation) {
            return null;
        }

        return $annotation->getExpression();
    }

    /**
     * Obligatoire avec Symfony 4, recommandé à partir de Symfony 3, inutile avec Symfony 2
     */
    public function reset()
    {
        $this->data = [];
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return 'app.my_security_collector';
    }
}

services.yml

 services:
  app.my_security_collector:
        class: AppBundle\DataCollector\MySecurityDataCollector
        tags:
            -
                name:     data_collector
                template: 'AppBundle:DataCollector:my_security.html.twig'
                id:       'app.my_security_collector'
        public: false