base.php

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<?php

declare(strict_types=1);

namespace ILIAS\UI\examples\Input\Field\SwitchableGroup;

use ILIAS\UI\URLBuilder;

function base()
{
    //Step 0: Declare dependencies
    global $DIC;
    $ui = $DIC->ui()->factory();
    $renderer = $DIC->ui()->renderer();
    $df = new \ILIAS\Data\Factory();
    $refinery = $DIC['refinery'];
    $request = $DIC->http()->request();
    $query = $DIC->http()->wrapper()->query();

    $here_uri = $df->uri($request->getUri()->__toString());
    $url_builder = new URLBuilder($here_uri);
    $example_namespace = ['input', 'switchable_group'];
    list($url_builder, $example_name) = $url_builder->acquireParameters($example_namespace, "example_name");
    $url_builder = $url_builder->withParameter($example_name, "standard");

    //Step 1: Define the groups (with their fields and a label each)
    $group1 = $ui->input()->field()->group(
        [
            "field_1_1" => $ui->input()->field()->text("Item 1.1", "Just some field"),
            "field_1_2" => $ui->input()->field()->text("Item 1.2", "Just some other field"),
            "field_1_3" => $ui->input()->field()->datetime("Item 1.3", "a date")->withFormat($df->dateFormat()->germanShort())
        ],
        "Switchable Group number one (with numeric key)"
    );
    $group2 = $ui->input()->field()->group(
        [
            "field_2_1" => $ui->input()->field()->text("Item 2", "Just another field")
                ->withValue('some val')
        ],
        "Switchable Group number two",
        "with byline"
    );
    $group3 = $ui->input()->field()->group([], 'No items in this group', 'but a byline');

    //Step 2: Switchable Group - one or the other:
    $sg = $ui->input()->field()->switchableGroup(
        [
            "1" => $group1,
            "g2" => $group2,
            "g3" => $group3
        ],
        "Pick One",
        "...or the other"
    );

    $form_action = $url_builder->buildURI()->__toString();
    $form = $ui->input()->container()->form()->standard(
        $form_action,
        [
            'switchable_group' => $sg,
            'switchable_group_required' => $sg->withRequired(true),
            'switchable_group_preset' => $sg->withValue("g2")
                                      ->withLabel("Again, Pick One")
                                      ->withByline("... or the other. 
                                      Second option is selected by default here.")
        ]
    );

    //Step 3: implement some form data processing.
    if ($query->has($example_name->getName())
        && $query->retrieve($example_name->getName(), $refinery->custom()->transformation(fn($v) => $v === 'standard'))
    ) {
        $form = $form->withRequest($request);
        $result = $form->getData();
    } else {
        $result = "No result yet.";
    }

    //Step 4: Render.
    return
        "<pre>" . htmlspecialchars(print_r($result, true), ENT_QUOTES) . "</pre><br/>" .
        $renderer->render($form);
}