Add working demo collector

src/DataCollector/TestDataCollector.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\DataCollector;
+
+use Symfony\Bundle\FrameworkBundle\DataCollector\AbstractDataCollector;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\VarDumper\Cloner\Data;
+
+class TestDataCollector extends AbstractDataCollector
+{
+
+    public function collect(Request $request, Response $response, ?\Throwable $exception = null): void
+    {
+        $this->data = [
+            'method' => $request->getMethod(),
+            'acceptable_content_types' => $request->getAcceptableContentTypes(),
+        ];
+    }
+
+    public function getMethod(): string
+    {
+        return $this->data['method'];
+    }
+
+    public function getAcceptableContentTypes(): array
+    {
+        return $this->data['acceptable_content_types'];
+    }
+
+    public function getSomeObject(): Data
+    {
+        // use the cloneVar() method to dump collected data in the profiler
+        return $this->cloneVar($this->data['method']);
+    }
+
+    public static function getTemplate(): ?string
+    {
+        return 'collector/test.html.twig';
+    }
+}

templates/collector/test.html.twig

@@ -0,0 +1,56 @@
+{% extends '@WebProfiler/Profiler/layout.html.twig' %}
+
+{% block toolbar %}
+    {% set icon %}
+        {% import 'stuff/_test.html.twig' as cavia %}
+        {# this is the content displayed as a panel in the toolbar #}
+        <span class="sf-toolbar-value">{{ cavia.cavia('cavia') }}</span>
+    {% endset %}
+
+    {% set text %}
+        {# this is the content displayed when hovering the mouse over
+           the toolbar panel #}
+        <div class="sf-toolbar-info-piece">
+            <b>Method</b>
+            <span>{{ collector.method }}</span>
+        </div>
+
+        <div class="sf-toolbar-info-piece">
+            <b>Accepted content type</b>
+            <span>{{ collector.acceptableContentTypes|join(', ') }}</span>
+        </div>
+    {% endset %}
+
+    {# the 'link' value set to 'false' means that this panel doesn't
+       show a section in the web profiler #}
+    {{ include('@WebProfiler/Profiler/toolbar_item.html.twig', { link: false }) }}
+{% endblock %}
+
+{% block menu %}
+    {# This left-hand menu appears when using the full-screen profiler. #}
+    <span class="label">
+        <span class="icon"><img src="..." alt=""/></span>
+        <strong>Cavia</strong>
+    </span>
+{% endblock %}
+
+{% block panel %}
+    {# Optional, for showing the most details. #}
+    <h2>Acceptable Content Types</h2>
+    <table>
+        <tr>
+            <th>Content Type</th>
+        </tr>
+
+        {% for type in collector.acceptableContentTypes %}
+            <tr>
+                <td>{{ type }}</td>
+            </tr>
+        {% endfor %}
+
+        {# use the profiler_dump() function to render the contents of dumped objects #}
+        <tr>
+            {{ profiler_dump(collector.someObject) }}
+        </tr>
+    </table>
+{% endblock %}

templates/default/homepage.html.twig

@@ -1,5 +1,7 @@
 {% extends 'base.html.twig' %}
 
+{% from 'stuff/_test.html.twig' import cavia %}
+
 {% block body_id 'homepage' %}
 
 {#
@@ -23,6 +25,7 @@
                 <p>
                     {{ 'help.browse_app'|trans|raw }}
                 </p>
+                {{ cavia('asdasdasdasdasd') }}
                 <p>
                     <a class="btn btn-primary btn-lg" href="{{ path('blog_index') }}">
                         <i class="fa fa-users" aria-hidden="true"></i> {{ 'action.browse_app'|trans }}

templates/stuff/_test.html.twig

@@ -0,0 +1,3 @@
+{% macro cavia(cavia) %}
+    I AM A {{ cavia }} MACRO
+{% endmacro cavia %}