3 namespace Drupal\metatag_hreflang\Plugin\Derivative;
5 use Drupal\Component\Plugin\Derivative\DeriverBase;
6 use Drupal\Core\Language\Language;
7 use Drupal\Core\Language\LanguageInterface;
10 * Create a new hreflang tag plugin for each enabled language.
12 class HreflangDeriver extends DeriverBase {
17 public function getDerivativeDefinitions($base_plugin_definition) {
18 // Get a list of all defined languages.
19 $languages = \Drupal::languageManager()
20 ->getLanguages(LanguageInterface::STATE_ALL);
22 // Now we loop over them and declare the derivatives.
23 /** @var \Drupal\Core\Language\LanguageInterface $language */
24 foreach ($languages as $langcode => $language) {
25 // Ignore the global values.
26 if ($langcode == Language::LANGCODE_NOT_SPECIFIED) {
29 elseif ($langcode == Language::LANGCODE_NOT_APPLICABLE) {
33 // The base definition includes the annotations defined in the plugin,
34 // i.e. HreflangPerLanguage. Each one may be overridden.
35 $derivative = $base_plugin_definition;
37 // Here we fill in any missing keys on the layout annotation.
38 $derivative['weight']++;
39 $derivative['id'] = 'hreflang_' . $langcode;
40 // The 'name' value is used as the value of the 'hreflang' attribute on
42 $derivative['name'] = $langcode;
43 $derivative['label'] = t("URL for a version of this page in %langcode", ['%langcode' => $language->getName()]);
44 $derivative['description'] = '';
46 // Reference derivatives based on their UUID instead of the record ID.
47 $this->derivatives[$derivative['id']] = $derivative;
50 return $this->derivatives;