Added a very basic Tag Cloud

src/GergelyPolonkai/FrontBundle/Resources/views/Default/front_base.html.twig

@@ -34,6 +34,13 @@
             </div>
             <div id="content">
                 <div id="content-padding"></div>
+{% if tagCloud|length > 0 %}
+                <div id="tag-cloud">
+{% for cloudItem in tagCloud %}
+                    <a href="{{ path('GergelyPolonkaiFrontBundle_blogTagList', { name: cloudItem.name }) }}" class="size{{ cloudItem.size }}">{{ cloudItem.name }}</a>
+{% endfor %}
+                </div>
+{% endif %}
                 <div id="menu">
                     <ul>
                         <li><a href="{{ path('GergelyPolonkaiFrontBundle_about') }}">About me</a></li>

src/GergelyPolonkai/FrontBundle/Twig/TagCloud.php

@@ -0,0 +1,50 @@
+<?php
+namespace GergelyPolonkai\FrontBundle\Twig;
+
+use Symfony\Bridge\Doctrine\RegistryInterface;
+use JMS\DiExtraBundle\Annotation as DI;
+
+/**
+ * Description of tagCloud
+ *
+ * @author polesz
+ *
+ * @DI\Service
+ * @DI\Tag("twig.extension")
+ */
+class TagCloud extends \Twig_Extension
+{
+    /**
+     * @var Symfony\Bridge\Doctrine\RegistryInterface $doctrine
+     */
+    private $doctrine;
+
+    /**
+     * @DI\InjectParams()
+     */
+    public function __construct(RegistryInterface $doctrine) {
+        $this->doctrine = $doctrine;
+    }
+
+    public function getGlobals()
+    {
+        $tagCloudQuery = $this->doctrine->getEntityManager()->createQuery('SELECT t, count(tg) ct FROM GergelyPolonkaiFrontBundle:Tag t LEFT JOIN t.tagging tg GROUP BY t.id ORDER BY t.name');
+        $tagCloudList = $tagCloudQuery->getResult();
+        $tagCloud = array();
+        foreach ($tagCloudList as $cloudElement) {
+            $tag = $cloudElement[0];
+            $tagCount = $cloudElement['ct'];
+            $size = ($tagCount == 0) ? 0 : floor(log($tagCount, 10));
+            if ($size > 5) $size = 5;
+            $tagCloud[] = array('name' => $tag->getName(), 'size' => $size);
+        }
+
+        return array(
+            'tagCloud' => $tagCloud,
+        );
+    }
+
+    public function getName() {
+        return 'gergelypolonkaifront_tagcloud';
+    }
+}