public function HreflangDeriver::getDerivativeDefinitions in Metatag 8

Gets the definition of all derivatives of a base plugin.

Parameters

array $base_plugin_definition: The definition array of the base plugin.

Return value

array An array of full derivative definitions keyed on derivative id.

Overrides DeriverBase::getDerivativeDefinitions

See also

getDerivativeDefinition()

File

metatag_hreflang/src/Plugin/Derivative/HreflangDeriver.php, line 20

Class

HreflangDeriver

Create a new hreflang tag plugin for each enabled language.

Namespace

Drupal\metatag_hreflang\Plugin\Derivative

Code

public function getDerivativeDefinitions($base_plugin_definition) {

  // Get a list of all defined languages.
  $languages = \Drupal::languageManager()
    ->getLanguages(LanguageInterface::STATE_ALL);

  // Now we loop over them and declare the derivatives.

  /** @var \Drupal\Core\Language\LanguageInterface $language */
  foreach ($languages as $langcode => $language) {

    // Ignore the global values.
    if ($langcode == Language::LANGCODE_NOT_SPECIFIED) {
      continue;
    }
    elseif ($langcode == Language::LANGCODE_NOT_APPLICABLE) {
      continue;
    }

    // The base definition includes the annotations defined in the plugin,
    // i.e. HreflangPerLanguage. Each one may be overridden.
    $derivative = $base_plugin_definition;

    // Here we fill in any missing keys on the layout annotation.
    $derivative['weight']++;
    $derivative['id'] = 'hreflang_' . $langcode;

    // The 'name' value is used as the value of the 'hreflang' attribute on
    // the HTML tag.
    $derivative['name'] = $langcode;
    $derivative['label'] = $this
      ->t("URL for a version of this page in %langcode", [
      '%langcode' => $language
        ->getName(),
    ]);
    $derivative['description'] = '';

    // Reference derivatives based on their UUID instead of the record ID.
    $this->derivatives[$derivative['id']] = $derivative;
  }
  return $this->derivatives;
}