TYPO3 Fluid GravatarViewHelper

GravatarViewHelper.php

<?php
namespace OliverThiele\OtWebsite\ViewHelpers;

use TYPO3\CMS\Fluid\ViewHelpers\Form\AbstractFormFieldViewHelper;
/**
 * Class GravatarViewHelper
 *
 * @package OliverThiele\OtWebsite\ViewHelpers
 */
class GravatarViewHelper extends AbstractFormFieldViewHelper {

	/**
	 * Initialize arguments.
	 *
	 * @return void
	 */
	public function initializeArguments() {
		$this->registerTagAttribute('email', 'string', 'Specifies the email', TRUE);
		$this->registerTagAttribute('size', 'string', 'Size in pixels, defaults to 80px [ 1 - 2048 ]', FALSE, '80');
		$this->registerTagAttribute('defaultImageset', 'string', 'Default imageset to use [ 404 | mm | identicon | monsterid | wavatar ]', FALSE, 'mm');
		$this->registerTagAttribute('rating', 'string', 'Maximum rating (inclusive) [ g | pg | r | x ]', FALSE, 'g');
		$this->registerTagAttribute('image', 'bool', 'True to return a complete IMG tag False for just the URL', FALSE, TRUE);
	//	$this->registerTagAttribute('additionalAttributes', 'array', 'Specifies additional attributes', FALSE);
	}

	/**
	 * Get either a Gravatar image tag or complete URL for a specified email address.
	 *
	 * @return String containing either just a URL or a complete image tag
	 * @source http://gravatar.com/site/implement/images/php/
	 */
	function render() {
		$url = 'http://www.gravatar.com/avatar/';
		$url .= md5(strtolower(trim($this->arguments['email'])));
		$url .= '?s=' . $this->arguments['size'] . '&d=' . $this->arguments['defaultImageset'] . '&r=' . $this->arguments['rating'];
		if ($this->arguments['image']) {
			$url = '<img src="' . $url . '"';
			foreach ($this->arguments['additionalAttributes'] as $key => $val) {
				$url .= ' ' . $key . '="' . $val . '"';
			}
			$url .= ' />';
		}
		return $url;
	}
}