README

Injects configurable section forms into Sulu CMS block settings via a single visitor — replacing the boilerplate of one FormMetadataVisitor class per section.

The Problem

Sulu allows extending the block settings form (content_block_settings) via FormMetadataVisitorInterface. In practice, every project needs multiple additional sections (theme, spacing, anchor, background, etc.), each requiring its own visitor class and service registration:

// Three nearly identical classes, one per section
class BlockSettingsThemeFormMetadataVisitor implements FormMetadataVisitorInterface { ... }
class BlockSettingsSpacingFormMetadataVisitor implements FormMetadataVisitorInterface { ... }
class BlockSettingsAnchorFormMetadataVisitor implements FormMetadataVisitorInterface { ... }

# Three service definitions with individual priorities
App\Admin\FormMetadataVisitor\BlockSettingsThemeFormMetadataVisitor:
 tags:
 - { name: sulu_admin.form_metadata_visitor, priority: -10 }
# ...

This bundle replaces all of that with a single visitor driven by configuration.

Installation

composer require alengo/block-settings-bundle

Register the bundle in config/bundles.php:

Alengo\SuluBlockSettingsBundle\BlockSettingsBundle::class => ['all' => true],

Configuration

Create config/packages/alengo_block_settings.yaml:

alengo_block_settings:
 sections:
 - content_block_settings_theme
 - content_block_settings_spacing
 - content_block_settings_anchor

Sections are injected in the order defined. Each entry is the key of an XML form registered with Sulu's XmlFormMetadataLoader — typically placed in config/forms/.

Full configuration reference

alengo_block_settings:
 form_key: content_block_settings # target form to inject into (default)
 priority: -10 # visitor tag priority (default)
 sections:
 - content_block_settings_theme
 - content_block_settings_spacing
 - content_block_settings_anchor

How It Works

BlockSettingsFormMetadataVisitor is registered as a sulu_admin.form_metadata_visitor. On each visit it:

1. Checks if the current form matches the configured form_key
2. Loads each configured section via XmlFormMetadataLoader
3. Skips sections already present (idempotent across locales)
4. Appends items in configured order

Project-side XML forms

The bundle provides the injection mechanism — the actual form definitions remain in the project. Example config/forms/content_block_settings_theme.xml:

<?xml version="1.0" ?>
<form xmlns="http://schemas.sulu.io/template/template"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://schemas.sulu.io/template/template https://schemas.sulu.io/template/form-1.0.xsd">
 <key>content_block_settings_theme</key>
 <properties>
 <section name="theme">
 <properties>
 <property name="template_theme" type="select">
 <!-- ... -->
 </property>
 </properties>
 </section>
 </properties>
</form>

Requirements

Package	Version
PHP	^8.2
Sulu	^3.0
Symfony	^7.0

License

MIT — alengo.dev