TagCloud.php

<?php

namespace Blog\View\Helper;

use Hex\View\Helper\ServiceLocatorAwareHelper;

use Zend\Tag\Cloud as ZendTagCloud;
use Zend\Tag\Cloud\Decorator\HtmlCloud as TagCloudDecorator;
use Zend\Tag\Cloud\Decorator\HtmlTag as TagCloudTag;

class TagCloud extends ServiceLocatorAwareHelper
{
    
    protected $service = null;
    
    public function __invoke()
    {
        $tags = $this->getService()->getMostUsedTags(40);

        if(count($tags) < 1) {
            return false;
        }

        $cloudDecorator = new TagCloudDecorator();
        $cloudDecorator->setHtmlTags(array(
            'div' => array('class' => 'Zend_Tag_Cloud')
        ));
        $cloudDecorator->setSeparator(', ');
        
        $tagDecorator = new TagCloudTag();
        $tagDecorator->setHtmlTags(array(
            'span'
        ));
        $tagDecorator->setMinFontSize(12);
        
        $cloud = new ZendTagCloud(array(
            'cloudDecorator' => $cloudDecorator,
            'tagDecorator' => $tagDecorator
        ));

        foreach($tags as $tag) {
            $url = $this->getView()->url('blog-tag', array('slug' => $tag->slug));
            $cloud->appendTag(array(
                'title' => $tag->title,
                'weight' => $tag->num,
                'params' => array(
                    'url' => $url
                )
            ));
        }

        return $this->getView()->partial('_tag_cloud.phtml', array('cloud' => $cloud));
    }
    
    protected function getService()
    {
        if($this->service === null) {
            $sm = $this->getServiceLocator()->getServiceLocator();
            $this->service = $sm->get('blogServiceTag');
        }

        return $this->service;
    }
}