hierarchical_taxonomy_menu.module

<?php

/**
 * @file
 * Contains hierarchical_taxonomy_menu.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function hierarchical_taxonomy_menu_help($route_name, RouteMatchInterface $route_match) {
  if ($route_name === 'help.page.hierarchical_taxonomy_menu') {
    $readme_file = file_exists(__DIR__ . '/README.md') ? __DIR__ . '/README.md' : __DIR__ . '/README.txt';
    if (!file_exists($readme_file)) {
      return NULL;
    }
    $text = file_get_contents($readme_file);
    if ($text && !\Drupal::moduleHandler()->moduleExists('markdown')) {
      return '<pre>' . $text . '</pre>';
    }
    else {
      // Use the Markdown filter to render the README.
      $filter_manager = \Drupal::service('plugin.manager.filter');
      $settings = \Drupal::configFactory()->get('markdown.settings')->getRawData();
      $config = ['settings' => $settings];
      $filter = $filter_manager->createInstance('markdown', $config);
      return $filter->process($text, 'en');
    }
  }
  return NULL;
}

/**
 * Implements hook_theme().
 */
function hierarchical_taxonomy_menu_theme($existing, $type, $theme, $path) {
  return [
    'hierarchical_taxonomy_menu' => [
      'variables' => [
        'menu_tree' => [],
        'route_tid' => NULL,
        'vocabulary' => NULL,
        'current_depth' => 0,
        'max_depth' => 0,
        'collapsible' => NULL,
      ],
    ],
  ];
}

/**
 * Implements template_preprocess_block().
 */
function hierarchical_taxonomy_menu_preprocess_block(&$variables) {
  if ($variables['plugin_id'] == 'hierarchical_taxonomy_menu' &&
    $variables['configuration']['label_display'] == 'visible' &&
    $variables['configuration']['dynamic_block_title']
  ) {
    $term = \Drupal::routeMatch()
      ->getParameter('taxonomy_term');

    if (!$term) {
      return NULL;
    }

    $langcode = \Drupal::languageManager()
      ->getCurrentLanguage()
      ->getId();

    $translation_languages = $term->getTranslationLanguages();
    if (isset($translation_languages[$langcode])) {
      $term = $term->getTranslation($langcode);
    }

    $variables['label'] = $term->getName();
  }
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function hierarchical_taxonomy_menu_theme_suggestions_hierarchical_taxonomy_menu(array $variables) {
  if (isset($variables['vocabulary'])) {
    return ['hierarchical_taxonomy_menu__' . $variables['vocabulary']];
  }
}