external_hreflang.module in External Hreflang 8

Module file.

File

external_hreflang.module

<?php

/**
 * @file
 * Module file.
 */
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Url;
use Drupal\external_hreflang\Plugin\metatag\Tag\ExternalHreflang;
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_simple_sitemap_links_alter().
 */
function external_hreflang_simple_sitemap_links_alter(&$links) {
  $languages = \Drupal::languageManager()
    ->getLanguages();
  foreach ($languages as $language) {
    $tokens_to_process['[current-page:url:relative:' . $language
      ->getId() . ']'] = $language;
  }
  foreach ($links as &$link) {
    if (isset($link['meta'], $link['meta']['path']) && empty($link['meta']['path'])) {
      $tags = _external_hreflang_get_metatags();
      $url = Url::fromRoute('<front>');
    }
    elseif (isset($link['meta'], $link['meta']['entity_info'])) {
      $entity = \Drupal::entityTypeManager()
        ->getStorage($link['meta']['entity_info']['entity_type'])
        ->load($link['meta']['entity_info']['id']);
      if ($entity instanceof EntityInterface) {
        $tags = _external_hreflang_get_metatags($entity
          ->getEntityTypeId(), $entity
          ->bundle());
        $url = Url::fromUserInput('/' . $link['meta']['path']);
      }
    }
    if (!empty($tags)) {
      foreach ($tags as $locale => $path) {
        foreach ($tokens_to_process as $token => $language) {
          if (strpos($path, $token) !== FALSE) {
            $url
              ->setOption('language', $language);
            $href = str_replace('/' . $language
              ->getId(), '', $url
              ->toString());
            $path = str_replace($token, $href, $path);
          }
        }
        $link['alternate_urls'][$locale] = $path;
      }
    }
  }
}

/**
 * Load the meta tags by processing the route parameters.
 *
 * @see metatag_get_tags_from_route()
 *
 * @return mixed
 *   Array of hreflang tags or NULL.
 */
function _external_hreflang_get_metatags(string $entity_type_id = '', string $bundle = '') {

  /** @var \Drupal\Core\Entity\EntityTypeManagerInterface $global_metatag_manager */
  $global_metatag_manager = \Drupal::entityTypeManager()
    ->getStorage('metatag_defaults');

  // First we load global defaults.
  $metatags = $global_metatag_manager
    ->load('global');
  if (!$metatags) {
    return NULL;
  }

  // Than we load for front page.
  if ($entity_type_id) {
    $entity_metatags = $global_metatag_manager
      ->load($entity_type_id);
    $metatags
      ->overwriteTags($entity_metatags
      ->get('tags'));

    // Check if bundle overrides should be added.
    $bundle_metatags = $global_metatag_manager
      ->load($entity_type_id . '__' . $bundle);
    if ($bundle_metatags != NULL) {

      // Merge with existing defaults.
      $metatags
        ->overwriteTags($bundle_metatags
        ->get('tags'));
    }
  }
  else {
    $front_metatags = $global_metatag_manager
      ->load('front');
    $metatags
      ->overwriteTags($front_metatags
      ->get('tags'));
  }
  $hreflag_tags = $metatags
    ->get('tags')['hreflang_external'] ?? '';
  return ExternalHreflang::getHrefLangsArrayFromString($hreflag_tags);
}

/**
 * Implements hook_help().
 */
function external_hreflang_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.external_hreflang':
      $output = '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('External Hreflang project allows adding alternate hreflang for external sites (not languages in Drupal).') . '</p>';
      $output .= '<h3>' . t('Usage') . '</h3>';
      $output .= '<p>' . t('To configure just access your metatag configuration and you can check a new field called "External Hreflang".') . '</p>';
      $output .= '<p>' . t('Fill this field using key|value sintax using language|url. E.g:".') . '</p>';
      $output .= '<ul>';
      $output .= '<li>' . t('en-US|http://www.google.com') . '</li>';
      $output .= '<li>' . t('es-ES|http://www.google.es') . '</li>';
      $output .= '</ul>';
      return $output;
  }
}

Functions

Name	Description
external_hreflang_help	Implements hook_help().
external_hreflang_simple_sitemap_links_alter	Implements hook_simple_sitemap_links_alter().
_external_hreflang_get_metatags	Load the meta tags by processing the route parameters.