drupal-handlebars/handlebars_theme_handler.module at master · mediamonks/drupal-handlebars · GitHub

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<?php

/**
 * @file
 * Contains handlebars_theme_handler.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function handlebars_theme_handler_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the handlebars_theme_handler module.
    case 'help.page.handlebars_theme_handler':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Module for handling handlebars.js templates and rendering') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_theme().
 */
function handlebars_theme_handler_theme() {
  /** @var \Drupal\handlebars_theme_handler\Plugin\ThemeEntityProcessorManager $entity_processor_plugin */
  $entity_processor_plugin = \Drupal::service('plugin.manager.handlebars_theme_handler_entity_processor');
  $definitions = $entity_processor_plugin->getDefinitions();
  $theme = [];
  foreach ($definitions as $key => $definition) {
    $theme[$key]['preprocess functions'][] = 'template_preprocess_' . $definition['entity_type'];
    $theme[$key]['preprocess functions'][] = 'handlebars_theme_handler_preprocess_theme_entity';
  }

  return $theme;
}

/**
 * Implements hook_theme_suggestions_alter().
 */
function handlebars_theme_handler_theme_suggestions_alter(array &$suggestions, array $variables, $hook) {
  /** @var \Drupal\handlebars_theme_handler\Plugin\ThemeEntityProcessorManager $entity_processor_plugin */
  $entity_processor_plugin_manager = \Drupal::service('plugin.manager.handlebars_theme_handler_entity_processor');
  $definitions = $entity_processor_plugin_manager->getDefinitions();
  foreach ($definitions as $theme_name => $definition) {
    if ($hook == $definition['entity_type']
      && $definition['bundle'] == $variables['elements']['#' . $hook]->bundle()
        && $variables['elements']['#view_mode'] == $definition['view_mode'] && $entity_processor_plugin_manager->isFrontTheme()) {
      $suggestions[] = $theme_name;
    }

  }
}

/**
 * Implements hook_theme_registry_alter().
 */
function handlebars_theme_handler_theme_registry_alter(&$theme_registry) {
  /** @var \Drupal\handlebars_theme_handler\Plugin\ThemeEntityProcessorManager $entity_processor_plugin */
  $entity_processor_plugin = \Drupal::service('plugin.manager.handlebars_theme_handler_entity_processor');
  $definitions = $entity_processor_plugin->getDefinitions();
  foreach ($definitions as $key => $definition) {
    $theme_registry[$key]['new_hook'] = $key;
  }
}

/**
 * Implements handlebars_theme_handler_preprocess_theme_entity().
 *
 * Load theme preprocessor manager. Create instance of plugin by new hook name.
 * Preprocess data by plugin instance.
 */
function handlebars_theme_handler_preprocess_theme_entity(&$variables, $hook, $info) {
  // Get plugin by new hook.
  if (isset($info['new_hook'])) {
    /** @var \Drupal\handlebars_theme_handler\Plugin\ThemeEntityProcessorManager $entity_processor_plugin_manager */
    $entity_processor_plugin_manager = \Drupal::service('plugin.manager.handlebars_theme_handler_entity_processor');
    $entity_processor_plugin_definition = $entity_processor_plugin_manager->getDefinition($info['new_hook']);
    if ($entity_processor_plugin_definition && $entity_processor_plugin_definition['id'] == $info['new_hook']) {
      /** @var \Drupal\handlebars_theme_handler\Plugin\ThemeEntityProcessorBase $entity_processor_plugin */
      $entity_processor_plugin = $entity_processor_plugin_manager->createInstance($info['new_hook']);
      $entity_processor_plugin->preprocessItemData($variables);
    }
  }
}