expandable_async_repo.php

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<?php

if ($_GET['async_ref']) {
    $ref = (int) $_GET['async_ref'];
    expandable_async_repo($ref);
    exit();
}

function expandable_async_repo($ref = null)
{
    global $DIC;
    $ilTree = $DIC['tree'];

    if (is_null($ref)) {
        $do_async = false;
        $ref = 1;
        $data = array(
            $ilTree->getNodeData(1)
        );
    } else {
        $do_async = true;
        $data = $ilTree->getChilds($ref);
        if (count($data) === 0) {
            return;
        }
    }

    $recursion = new class implements \ILIAS\UI\Component\Tree\TreeRecursion {
        public function getChildren($record, $environment = null) : array
        {
            return [];
        }

        public function build(
            \ILIAS\UI\Component\Tree\Node\Factory $factory,
            $record,
            $environment = null
        ) : \ILIAS\UI\Component\Tree\Node\Node {
            $ref_id = $record['ref_id'];
            $label = $record['title']
                . ' (' . $record['type'] . ', ' . $ref_id . ')';

            $icon = $environment['icon_factory']->standard($record["type"], '');
            $url = $this->getAsyncURL($environment, $ref_id);

            $node = $factory->simple($label, $icon)
                ->withAsyncURL($url);

            //find these under ILIAS->Administration in the example tree
            if ((int) $ref_id > 9 && (int) $ref_id < 20) {
                $label = $environment['modal']->getShowSignal()->getId();
                $node = $factory->simple($label)
                    ->withAsyncURL($url)
                    ->withOnClick($environment['modal']->getShowSignal());
            }

            return $node;
        }

        protected function getAsyncURL($environment, string $ref_id) : string
        {
            $url = $environment['url'];
            $base = substr($url, 0, strpos($url, '?') + 1);
            $query = parse_url($url, PHP_URL_QUERY);
            parse_str($query, $params);
            $params['async_ref'] = $ref_id;
            $url = $base . http_build_query($params);
            return $url;
        }
    };

    $f = $DIC->ui()->factory();
    $renderer = $DIC->ui()->renderer();
    $image = $f->image()->responsive("src/UI/examples/Image/mountains.jpg", "Image source: https://stocksnap.io, Creative Commons CC0 license");
    $page = $f->modal()->lightboxImagePage($image, 'Mountains');
    $modal = $f->modal()->lightbox($page);

    $environment = [
        'url' => $DIC->http()->request()->getRequestTarget(),
        'modal' => $modal,
        'icon_factory' => $f->symbol()->icon()
    ];

    $tree = $f->tree()->expandable("Label", $recursion)
        ->withEnvironment($environment)
        ->withData($data);

    if (!$do_async) {
        return $renderer->render([$modal, $tree]);
    } else {
        echo $renderer->renderAsync([$modal, $tree]);
    }
}