component_schema-1.0.x-dev/modules/component_schema_ui_patterns/component_schema_ui_patterns.module

<?php

/**
 * @file
 * Integrates Component Schema with the UI Patterns module.
 */

use Drupal\component_schema\ComponentSchema;
use Drupal\component_schema_ui_patterns\Element\ComponentPattern;
use Drupal\ui_patterns\UiPatterns;

/**
 * Implements hook_element_info_alter().
 */
function component_schema_ui_patterns_element_info_alter(array &$info) {
  $element_types = [
    'pattern',
    'pattern_preview',
  ];
  foreach ($element_types as $element_type) {
    if (isset($info[$element_type])) {
      $info[$element_type]['#pre_render'] = $info[$element_type]['#pre_render'] ?? [];
      $info[$element_type]['#pre_render'][] = [ComponentPattern::class, 'expandVariables'];
    }
  }
}

/**
 * Implements hook_module_implements_alter().
 */
function component_schema_ui_patterns_module_implements_alter(&$implementations, $hook) {
  // Move our implementation to the end so we can act after ui_patterns and
  // ui_patterns_settings.
  if ($hook == 'element_info_alter') {
    $group = $implementations['component_schema_ui_patterns'];
    unset($implementations['component_schema_ui_patterns']);
    $implementations['component_schema_ui_patterns'] = $group;
  }
}

/**
 * Implements hook_theme_registry_alter().
 *
 * Add top-level component variables to the pattern theme.
 *
 * @see \Drupal\component_schema_ui_patterns\Element\ComponentElement::expandVariables()
 */
function component_schema_ui_patterns_theme_registry_alter(&$theme_registry) {
  foreach (UiPatterns::getManager()->getPatterns() as $pattern) {
    $definition = $pattern->getPluginDefinition();
    if (isset($theme_registry['pattern_' . $definition->id()])) {
      if ($component = ComponentSchema::getComponentSchema($definition->id())) {
        foreach (array_keys($component->getElements()) as $key) {
          $theme_registry['pattern_' . $definition->id()]['variables'][$key] = NULL;
        }
      }
      // @todo Remove flattened variables that will be replaced by the top-level
      //   ones we've added.
    }
  }
}