Renderer.php

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<?php

declare(strict_types=1);

namespace ILIAS\UI\Implementation\Component\Counter;

use ILIAS\UI\Implementation\Render\AbstractComponentRenderer;
use ILIAS\UI\Renderer as RendererInterface;
use ILIAS\UI\Component;
use ILIAS\UI\Implementation\Render\ResourceRegistry;

class Renderer extends AbstractComponentRenderer
{
    public function render(Component\Component $component, RendererInterface $default_renderer): string
    {
        if (!$component instanceof Component\Counter\Counter) {
            $this->cannotHandleComponent($$component);
        }

        $tpl = $this->getTemplate("tpl.counter.html", true, true);
        if ($component->getNumber() === 0) {
            $tpl->touchBlock("hidden_" . $component->getType());
        }
        $tpl->setCurrentBlock($component->getType());
        $tpl->setVariable("NUMBER", $component->getNumber());
        $tpl->parseCurrentBlock();
        return $tpl->get();
    }

    public function registerResources(ResourceRegistry $registry): void
    {
        parent::registerResources($registry);
        $registry->register('assets/js/counter.js');
    }
}