language_access.module in Language access 8

Provide access permissions by language.

File

language_access.module

<?php

/**
 * @file
 * Provide access permissions by language.
 */
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Url;
use Drupal\language_access\LimitLanguageOptionsCallback;
use Drupal\language_access\Plugin\LanguageNegotiation\LanguageAccessNegotiationBrowser;
use Drupal\user\Entity\User;

/**
 * Implements hook_help().
 */
function language_access_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.language_access':
      $text = file_get_contents(dirname(__FILE__) . '/README.md');
      if (!\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_language_switch_links_alter().
 */
function language_access_language_switch_links_alter(array &$links, $type, Url $url) {
  $languages = \Drupal::languageManager()
    ->getLanguages();
  foreach ($languages as $language) {
    if (!\Drupal::currentUser()
      ->hasPermission('access language ' . $language
      ->getId())) {
      if (isset($links[$language
        ->getId()])) {
        unset($links[$language
          ->getId()]);
      }
    }
  }
}

/**
 * Implements hook_form_FORM_ID_alter() for 'user_form'.
 */
function language_access_form_user_form_alter(&$form, FormStateInterface $form_state) {
  if (isset($form['language']['preferred_langcode'])) {

    // Add our processing hook. Ensure the target user is available for
    // permission checking.
    $form['language']['preferred_langcode']['#pre_render']['language_access'] = [
      LimitLanguageOptionsCallback::class,
      'preRender',
    ];
    $form['language']['preferred_langcode']['#for_user'] = $form_state
      ->getFormObject()
      ->getEntity();
  }
}

/**
 * Implements hook_field_widget_WIDGET_TYPE_form_alter() for 'language_select'.
 */
function language_access_field_widget_language_select_form_alter(array &$element, FormStateInterface $form_state, array $context) {
  $element['#after_build'][] = [
    LimitLanguageOptionsCallback::class,
    'afterBuild',
  ];
  $element['#for_user'] = \Drupal::currentUser();
}

/**
 * Implements hook_page_attachments_alter().
 *
 * Hide hreflang tags for translations the current user doesn't have access to.
 */
function language_access_page_attachments_alter(array &$attachments) {
  if (isset($attachments['#attached']['html_head_link'])) {
    $languages = \Drupal::languageManager()
      ->getLanguages();
    foreach ($attachments['#attached']['html_head_link'] as $key => $html_head_link) {

      // Check that we're altering the right tag.
      if (!isset($html_head_link[0]['rel'], $html_head_link[0]['hreflang']) || $html_head_link[0]['rel'] !== 'alternate') {
        continue;
      }

      // Check that the language exists.
      if (!isset($languages[$html_head_link[0]['hreflang']])) {
        continue;
      }

      // Check that the user doesn't have access to the language.
      if (\Drupal::currentUser()
        ->hasPermission('access language ' . $html_head_link[0]['hreflang'])) {
        continue;
      }
      unset($attachments['#attached']['html_head_link'][$key]);
    }
  }
}

/**
 * Implements hook_simple_sitemap_links_alter().
 */
function language_access_simple_sitemap_links_alter(array &$links) {
  $languages = \Drupal::languageManager()
    ->getLanguages();
  $user = User::getAnonymousUser();
  foreach ($links as $key => $link) {
    if (isset($languages[$link['langcode']]) && !$user
      ->hasPermission('access language ' . $link['langcode'])) {
      unset($links[$key]);
    }
    if (isset($link['alternate_urls'])) {
      foreach ($link['alternate_urls'] as $langcode => $alternate_url) {
        if (isset($languages[$langcode]) && !$user
          ->hasPermission('access language ' . $langcode)) {
          unset($links[$key]['alternate_urls'][$langcode]);
        }
      }
    }
  }
}

/**
 * Implements hook_language_negotiation_info_alter().
 *
 * Replace the language-browser negotiation with our own plugin that checks th
 * access to the languages.
 *
 * @see \Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationBrowser
 * @see \Drupal\language_access\Plugin\LanguageNegotiation\LanguageAccessNegotiationBrowser
 */
function language_access_language_negotiation_info_alter(array &$negotiation_info) {
  if (isset($negotiation_info['language-browser'])) {
    $negotiation_info['language-browser']['class'] = LanguageAccessNegotiationBrowser::class;
  }
}

Functions

Name	Description
language_access_field_widget_language_select_form_alter	Implements hook_field_widget_WIDGET_TYPE_form_alter() for 'language_select'.
language_access_form_user_form_alter	Implements hook_form_FORM_ID_alter() for 'user_form'.
language_access_help	Implements hook_help().
language_access_language_negotiation_info_alter	Implements hook_language_negotiation_info_alter().
language_access_language_switch_links_alter	Implements hook_language_switch_links_alter().
language_access_page_attachments_alter	Implements hook_page_attachments_alter().
language_access_simple_sitemap_links_alter	Implements hook_simple_sitemap_links_alter().