Update Drupal 11.4 Hook Attribute Compatibility

Problem/Motivation

Patternkit has two procedural hook functions that generate PHP deprecation notices on Drupal 11.4: patternkit_rebuild() in patternkit.module and patternkit_media_library_element_info_alter() in patternkit_media_library.module.

Drupal 11.2 introduced the #[LegacyHook] attribute to bridge procedural implementations to OOP #[Hook] dispatch. Drupal 11.4 deprecated procedural hooks that do not use this bridge. All other procedural hooks in Patternkit already carry #[LegacyHook] and delegate to Hook classes with #[Hook] attributes. These two were missed.

On Drupal 11.4, any site with Patternkit installed will see deprecation notices originating from these two functions on every cache clear and request that processes element info.

Steps to reproduce

1. Install Patternkit on a Drupal 11.4 site.
2. Enable patternkit_media_library.
3. Clear caches (drush cr).
4. Observe PHP deprecation notices for patternkit_rebuild() and patternkit_media_library_element_info_alter().

Proposed resolution

Migrate both functions to OOP #[Hook]-attributed methods and remove the procedural wrappers.

patternkit_rebuild()

Add a rebuild() method to PatternkitHooks with #[Hook('rebuild')]. The method injects patternkit.library.namespace_resolver and patternkit.pattern.discovery as constructor dependencies and calls ->rebuild() on each. Remove patternkit_rebuild() from patternkit.module.

Drupal core's BlockHooks::rebuild() in block/src/Hook/BlockHooks.php provides a direct precedent for this pattern.

patternkit_media_library_element_info_alter()

Add an elementInfoAlter() method to a new PatternkitMediaLibraryHooks class in modules/patternkit_media_library/src/Hook/, decorated with #[Hook('element_info_alter')]. The method body appends JsonEditorFormElementAlterHandler::class to the #pre_render array for jsoneditor_form elements. No service injection is required. Register the class in patternkit_media_library.services.yml or confirm auto-discovery. Remove patternkit_media_library_element_info_alter() from patternkit_media_library.module.

Remaining tasks

• Review and test the merge request.
• CI validation.

User interface changes

None.

Introduced terminology

None.

API changes

None.

Data model changes

None.

Release notes snippet

Patternkit now uses OOP #[Hook]-attributed methods for hook_rebuild and hook_element_info_alter, removing the last two procedural hook functions that generated PHP deprecation notices on Drupal 11.4. Sites running Drupal 11.4 with Patternkit and patternkit_media_library enabled will no longer see these deprecation notices after upgrading.