with_autocomplete_endpoint.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\UI\examples\Input\Field\Tag;
 
use ILIAS\UI\URLBuilder;
use ILIAS\Filesystem\Stream\Streams;
 
function with_autocomplete_endpoint()
{
    global $DIC;
    $ui = $DIC->ui()->factory();
    $renderer = $DIC->ui()->renderer();
    $refinery = $DIC->refinery();
    $http = $DIC->http();
 
    $df = new \ILIAS\Data\Factory();
 
    [$url_builder, $term_token] = (new URLBuilder($df->uri($http->request()->getUri()->__toString())))
        ->acquireParameter(['examples'], 'term');
 
    $search_term = $http->wrapper()->query()->retrieve(
        $term_token->getName(),
        $refinery->byTrying([
            $refinery->kindlyTo()->string(),
            $refinery->always('')
        ])
    );
 
    if ($search_term !== '') {
        $response = json_encode(
            array_reduce(
                ['Interesting', 'Boring', 'Animating', 'Repetitious'],
                static function (array $c, string $v) use ($refinery, $search_term): array {
                    if (stristr($v, $search_term)) {
                        $c[] = [
                            'value' => urlencode($refinery->encode()->htmlSpecialCharsAsEntities()->transform($v)),
                            'display' => $v,
                            'searchBy' => $v
                        ];
                    }
                    return $c;
                },
                []
            )
        );
        $http->saveResponse(
            $http->response()->withBody(
                Streams::ofString($response)
            )
        );
        $http->sendResponse();
        $http->close();
    }
 
    $tag_input = $ui->input()->field()->tag(
        "Tag Input with Autocomplete",
        []
    )->withAsyncAutocomplete(
        $url_builder,
        $term_token
    )->withUserCreatedTagsAllowed(false);
 
    return  $renderer->render(
        $ui->input()->container()->form()->standard("#", [$tag_input])
    );
}