Simple ViewHelper to create facet filter links (without filling up the Routing Cache) Raw

FacetViewHelper.php

<?php
namespace Wwwision\Test\ViewHelpers\Link;

use Neos\FluidAdaptor\Core\ViewHelper\AbstractTagBasedViewHelper;
use Neos\FluidAdaptor\Core\ViewHelper;

/**
 * Simple ViewHelper to create facet filter links
 *
 * Usage:
 * <x:link.filter facetName="someFacet" facetValue="someValue" />
 */
class FacetViewHelper extends AbstractTagBasedViewHelper
{

    /**
     * @var string
     */
    protected $tagName = 'a';

    /**
     * @return void
     */
    public function initializeArguments()
    {
        $this->registerUniversalTagAttributes();
        $this->registerTagAttribute('name', 'string', 'Specifies the name of an anchor');
        $this->registerTagAttribute('rel', 'string', 'Specifies the relationship between the current document and the linked document');
        $this->registerTagAttribute('rev', 'string', 'Specifies the relationship between the linked document and the current document');
        $this->registerTagAttribute('target', 'string', 'Specifies where to open the linked document');
    }

    /**
     * @param string $facetName
     * @param string $facetValue
     * @return string
     * @throws ViewHelper\Exception if the URI could not be resolved
     */
    public function render(string $facetName, string $facetValue)
    {
        $uriBuilder = $this->controllerContext->getUriBuilder();
        $uriBuilder->reset();
        try {
            // Adjust those values
            $uri = $uriBuilder->uriFor('facetAction', [], 'controllerName', 'packageKey');
        } catch (\Exception $exception) {
            throw new ViewHelper\Exception($exception->getMessage(), $exception->getCode(), $exception);
        }
        $uri .= '?' . htmlspecialchars($facetName) . '=' . htmlspecialchars($facetValue);
        $this->tag->addAttribute('href', $uri);
        $content = $this->renderChildren();
        if ($content === null) {
            $content = $facetValue;
        }
        $this->tag->setContent($content);
        $this->tag->forceClosingTag(true);

        return $this->tag->render();
    }

}