ot_typo3/ot_templating/Classes/ViewHelpers/EventsPage/GetIdViewHelper.php

<?php

namespace Opentalent\OtTemplating\ViewHelpers\EventsPage;

use Opentalent\OtTemplating\Page\OtPageRepository;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;

/**
 * Viewhelper to retrieve the Id of the current site events page
 * The events page is the first page found which has the template 'OpenTalent.OtTemplating->events'
 * Return null if no such page is found
 *
 * Call it in fluid templates with:
 *
 *     {namespace ot=Opentalent\OtTemplating\ViewHelpers}
 *
 *     {ot:eventsPage.getId()}
 *
 * @package Opentalent\OtTemplating\ViewHelpers
 */
class GetIdViewHelper extends AbstractViewHelper
{

    public function initializeArguments()
    {
    }

    /**
     * @param array $arguments
     * @param \Closure $renderChildrenClosure
     * @param RenderingContextInterface $renderingContext
     * @return int|null
     */
    public static function renderStatic(
        array $arguments,
        \Closure $renderChildrenClosure,
        RenderingContextInterface $renderingContext
    ) {
        $rootId = \Opentalent\OtTemplating\ViewHelpers\RootPage\GetIdViewHelper::renderStatic(
            $arguments,
            $renderChildrenClosure,
            $renderingContext
        );
        $pageRepository = new OtPageRepository();

        $subpages = $pageRepository->getAllSubpagesForPage($rootId);

        foreach ($subpages as $page) {
            if ($page['tx_fed_page_controller_action'] === 'OpenTalent.OtTemplating->events') {
                return $page['uid'];
            }
        }
        return null;
    }
}