Headless

Learn, how to put toolbox into headless mode.

Thinks to know

• The Headless layout will super simplify the backend edit mode. No views will be generated there, but only the configuration fields.
• In the frontend layer, the editable output will be a simple array (already nested)
• All toolbox editables except parallax and slidecolumn are headless ready out of the box
• Since the output is json, you're not able to add or modify data in view. Use the HEADLESS_EDITABLE_ACTION event to add more data and use a tagged toolbox.property.normalizer to change the json output

Headless Aware Editable

If your editable should work within the headless layout, you need to add some more stuff:

• Add ToolboxHeadlessAwareBrickInterface
• Add headlessAction method

Example:

<?php

namespace App\Document\Area\MyHeadlessEditable;

use OpenDxp\Model\Document\Editable\Area\Info;
use Symfony\Component\HttpFoundation\Response;
use OpenDxp\Bundle\ToolboxBundle\Document\Areabrick\AbstractAreabrick;
use OpenDxp\Bundle\ToolboxBundle\Document\Areabrick\ToolboxHeadlessAwareBrickInterface;
use OpenDxp\Bundle\ToolboxBundle\Document\Response\HeadlessResponse;

class MyHeadlessEditable extends AbstractAreabrick implements ToolboxHeadlessAwareBrickInterface
{
    public function action(Info $info): ?Response
    {
        $this->buildInfoParameters($info);

        return parent::action($info);
    }

    public function headlessAction(Info $info, HeadlessResponse $headlessResponse): void
    {
        $this->buildInfoParameters($info, $headlessResponse);

        parent::headlessAction($info, $headlessResponse);
    }

    private function buildInfoParameters(Info $info, ?HeadlessResponse $headlessResponse = null): void
    {
        $infoParams = $info->getParams();
        
        $mySpecialParameter = '[AWESOME]';

        if ($headlessResponse instanceof HeadlessResponse) {
            // will be used in fe output
            $headlessResponse->addAdditionalConfigData('mySpecialParameter', $mySpecialParameter);

            return;
        }

        // will be used in editmode
        $info->setParam('mySpecialParameter', $mySpecialParameter);
    }
}

Setup

opendxp_toolbox:
    theme:
        layout: !php/const OpenDxp\Bundle\ToolboxBundle\Manager\LayoutManagerInterface::TOOLBOX_LAYOUT_HEADLESS
        calculators:
            column_calculator: OpenDxp\Bundle\ToolboxBundle\Calculator\Bootstrap4\ColumnCalculator # or your custom headless calculator
            slide_calculator: OpenDxp\Bundle\ToolboxBundle\Calculator\Bootstrap4\SlideColumnCalculator # or your custom headless calculator. slide columns aren't supported right now, so it doesn't matter which service you're using

---

Headless Documents

It's possible to create simple headless documents:

opendxp_toolbox:
    enabled_core_areas:
        - content
        - headline
        - image

    theme:
        layout: !php/const OpenDxp\Bundle\ToolboxBundle\Manager\LayoutManagerInterface::TOOLBOX_LAYOUT_HEADLESS
        headless_documents:
            
            default_headless_document:
                areas:
                    index_headline:
                        type: area
                        config:
                            type: headline
                    myBlock:
                        type: areablock

            another_headless_document:
                areas:
                    headline:
                        type: area
                        config:
                            type: headline
                    wysiwyg:
                        type: area
                        config:
                            type: content
                    simple_input:
                        type: input
                        title: 'My Simple Input'
                    awesome_blocks:
                        type: block
                        children:
                            block_text:
                                type: input
                                title: 'Text'
                            block_link:
                                type: link
                                property_normalizer: OpenDxp\Bundle\ToolboxBundle\Normalizer\LinkNormalizer
                                title: 'Link'
                                config:
                                    class: 'list-link'
                    special_accordion:
                        type: area
                        config:
                            type: accordion

• Add ToolboxBundle\Controller\HeadlessController::headlessDocumentAction as action to your document.
• Add a text property to the document called headless_document and set default_headless_document as value. You can create multiple documents that way.

---

Extend existing headless editables

Just register an event listener to ToolboxBundle::HEADLESS_EDITABLE_ACTION which will provide you an HeadlessEditableActionEvent object where you're allowed to add additional data to the HeadlessResponse object

Normalize data

In headless context, you're not able to modify output via view files and in some scenarios you also want to output data differently in a given context.

Toolbox comes with some pre-configured normalizers:

DownloadRelationsNormalizer

This normalizer will transform download relations to meaningful data arrays (like the toolbox_download_info twig helper)

GalleryRelationsNormalizer

This normalizer will transform gallery relations to thumbnail data arrays

ImageEditableNormalizer

This normalizer will transform the inline image editable to a thumbnail data array

Custom normalizer

First, you need to add your normalizer:

services:
    App\Normalizer\MyNormalizer:
        tags:
            - { name: toolbox.property.normalizer }

<?php

namespace App\Normalizer;

use OpenDxp\Bundle\ToolboxBundle\Normalizer\PropertyNormalizerInterface;

class MyNormalizer implements PropertyNormalizerInterface
{
    public function normalize(mixed $value, ?string $toolboxContextId = null): mixed
    {
        // @todo: normalize your data
        
        return $value;
    }
}

Then, assign them:

opendxp_toolbox:
    areas:
        my_area:
            config_elements:
                simple_config:
                    type: checkbox
                    title: 'Super Checkbox'
                    config: ~
                    property_normalizer: App\Normalizer\MyNormalizer # normalize the config value
            config_parameter: ~
            inline_config_elements:
                inline_relations:
                    type: relations
                    config: ~
            additional_property_normalizer:
                myAdditionalProperty: App\Normalizer\MyNormalizer # normalize your config property, added in your "headlessAction() method

Default normalizer definition

If you want to apply a normalizer to every element of type checkbox, you're able to define it globally:

opendxp_toolbox:
    property_normalizer:
        default_type_mapping:
            checkbox: App\Normalizer\MyNormalizer

It is still possible, to override the default mapping by using the property_normalizer in your element config since those will be processed with the highest priority!