Renderer.php

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<?php

declare(strict_types=1);

namespace ILIAS\UI\Implementation\Component\Breadcrumbs;

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

class Renderer extends AbstractComponentRenderer
{
    public function render(Component\Component $component, RendererInterface $default_renderer): string
    {
        $this->checkComponent($component);

        $tpl = $this->getTemplate("tpl.breadcrumbs.html", true, true);

        $tpl->setVariable("ARIA_LABEL", $this->txt('breadcrumbs_aria_label'));

        foreach ($component->getItems() as $crumb) {
            $tpl->setCurrentBlock("crumbs");
            $tpl->setVariable("CRUMB", $default_renderer->render($crumb));
            $tpl->parseCurrentBlock();
        }
        return $tpl->get();
    }

    protected function getComponentInterfaceName(): array
    {
        return array(Component\Breadcrumbs\Breadcrumbs::class);
    }
}