www.aleph1.co.uk Git - yaffs-website/blob - web/core/modules/language/src/EventSubscriber/ConfigSubscriber.php

   1 <?php
   2
   3 namespace Drupal\language\EventSubscriber;
   4
   5 use Drupal\Core\Config\ConfigFactoryInterface;
   6 use Drupal\Core\Language\Language;
   7 use Drupal\Core\Language\LanguageDefault;
   8 use Drupal\Core\Language\LanguageManagerInterface;
   9 use Drupal\Core\Config\ConfigCrudEvent;
  10 use Drupal\Core\Config\ConfigEvents;
  11 use Drupal\language\ConfigurableLanguageManager;
  12 use Drupal\language\HttpKernel\PathProcessorLanguage;
  13 use Drupal\language\LanguageNegotiatorInterface;
  14 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  15
  16 /**
  17  * Deletes the container if default language has changed.
  18  */
  19 class ConfigSubscriber implements EventSubscriberInterface {
  20
  21   /**
  22    * The language manager.
  23    *
  24    * @var \Drupal\Core\Language\LanguageManagerInterface
  25    */
  26   protected $languageManager;
  27
  28   /**
  29    * The default language.
  30    *
  31    * @var \Drupal\Core\Language\LanguageDefault
  32    */
  33   protected $languageDefault;
  34
  35   /**
  36    * The configuration factory.
  37    *
  38    * @var \Drupal\Core\Config\ConfigFactoryInterface
  39    */
  40   protected $configFactory;
  41
  42   /**
  43    * The language negotiator.
  44    *
  45    * @var \Drupal\language\LanguageNegotiatorInterface
  46    */
  47   protected $languageNegotiator;
  48
  49   /**
  50    * The language path processor.
  51    *
  52    * @var \Drupal\language\HttpKernel\PathProcessorLanguage
  53    */
  54   protected $pathProcessorLanguage;
  55
  56   /**
  57    * Constructs a new class object.
  58    *
  59    * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
  60    *   The language manager.
  61    * @param \Drupal\Core\Language\LanguageDefault $language_default
  62    *   The default language.
  63    * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
  64    *   The configuration factory.
  65    * @param \Drupal\language\LanguageNegotiatorInterface $language_negotiator
  66    *   The language negotiator.
  67    */
  68   public function __construct(LanguageManagerInterface $language_manager, LanguageDefault $language_default, ConfigFactoryInterface $config_factory, LanguageNegotiatorInterface $language_negotiator) {
  69     $this->languageManager = $language_manager;
  70     $this->languageDefault = $language_default;
  71     $this->configFactory = $config_factory;
  72     $this->languageNegotiator = $language_negotiator;
  73   }
  74
  75   /**
  76    * Causes the container to be rebuilt on the next request.
  77    *
  78    * This event subscriber assumes that the new default langcode and old default
  79    * langcode are valid langcodes. If the schema definition of either
  80    * system.site:default_langcode or language.negotiation::url.prefixes changes
  81    * then this event must be changed to work with both the old and new schema
  82    * definition so this event is update safe.
  83    *
  84    * @param ConfigCrudEvent $event
  85    *   The configuration event.
  86    */
  87   public function onConfigSave(ConfigCrudEvent $event) {
  88     $saved_config = $event->getConfig();
  89     if ($saved_config->getName() == 'system.site' && $event->isChanged('default_langcode')) {
  90       $new_default_langcode = $saved_config->get('default_langcode');
  91       $default_language = $this->configFactory->get('language.entity.' . $new_default_langcode);
  92       // During an import the language might not exist yet.
  93       if (!$default_language->isNew()) {
  94         $this->languageDefault->set(new Language($default_language->get()));
  95         $this->languageManager->reset();
  96
  97         // Directly update language negotiation settings instead of calling
  98         // language_negotiation_url_prefixes_update() to ensure that the code
  99         // obeys the hook_update_N() restrictions.
 100         $negotiation_config = $this->configFactory->getEditable('language.negotiation');
 101         $negotiation_changed = FALSE;
 102         $url_prefixes = $negotiation_config->get('url.prefixes');
 103         $old_default_langcode = $saved_config->getOriginal('default_langcode');
 104         if (empty($url_prefixes[$old_default_langcode])) {
 105           $negotiation_config->set('url.prefixes.' . $old_default_langcode, $old_default_langcode);
 106           $negotiation_changed = TRUE;
 107         }
 108         if (empty($url_prefixes[$new_default_langcode])) {
 109           $negotiation_config->set('url.prefixes.' . $new_default_langcode, '');
 110           $negotiation_changed = TRUE;
 111         }
 112         if ($negotiation_changed) {
 113           $negotiation_config->save(TRUE);
 114         }
 115       }
 116       // Trigger a container rebuild on the next request by invalidating it.
 117       ConfigurableLanguageManager::rebuildServices();
 118     }
 119     elseif ($saved_config->getName() == 'language.types' && $event->isChanged('negotiation')) {
 120       // If the negotiation configuration changed the language negotiator and
 121       // the language path processor have to be reset so that they regenerate
 122       // the method instances and also sort them accordingly to the new config.
 123       $this->languageNegotiator->reset();
 124       if (isset($this->pathProcessorLanguage)) {
 125         $this->pathProcessorLanguage->reset();
 126       }
 127     }
 128   }
 129
 130   /**
 131    * Injects the language path processors on multilingual site configuration.
 132    *
 133    * @param \Drupal\language\HttpKernel\PathProcessorLanguage $path_processor_language
 134    *   The language path processor.
 135    */
 136   public function setPathProcessorLanguage(PathProcessorLanguage $path_processor_language) {
 137     $this->pathProcessorLanguage = $path_processor_language;
 138   }
 139
 140   /**
 141    * {@inheritdoc}
 142    */
 143   public static function getSubscribedEvents() {
 144     $events[ConfigEvents::SAVE][] = ['onConfigSave', 0];
 145     return $events;
 146   }
 147
 148 }