diff core/modules/language/src/EventSubscriber/ConfigSubscriber.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/language/src/EventSubscriber/ConfigSubscriber.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,148 @@
+<?php
+
+namespace Drupal\language\EventSubscriber;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Language\Language;
+use Drupal\Core\Language\LanguageDefault;
+use Drupal\Core\Language\LanguageManagerInterface;
+use Drupal\Core\Config\ConfigCrudEvent;
+use Drupal\Core\Config\ConfigEvents;
+use Drupal\language\ConfigurableLanguageManager;
+use Drupal\language\HttpKernel\PathProcessorLanguage;
+use Drupal\language\LanguageNegotiatorInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * Deletes the container if default language has changed.
+ */
+class ConfigSubscriber implements EventSubscriberInterface {
+
+  /**
+   * The language manager.
+   *
+   * @var \Drupal\Core\Language\LanguageManagerInterface
+   */
+  protected $languageManager;
+
+  /**
+   * The default language.
+   *
+   * @var \Drupal\Core\Language\LanguageDefault
+   */
+  protected $languageDefault;
+
+  /**
+   * The configuration factory.
+   *
+   * @var \Drupal\Core\Config\ConfigFactoryInterface
+   */
+  protected $configFactory;
+
+  /**
+   * The language negotiator.
+   *
+   * @var \Drupal\language\LanguageNegotiatorInterface
+   */
+  protected $languageNegotiator;
+
+  /**
+   * The language path processor.
+   *
+   * @var \Drupal\language\HttpKernel\PathProcessorLanguage
+   */
+  protected $pathProcessorLanguage;
+
+  /**
+   * Constructs a new class object.
+   *
+   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+   *   The language manager.
+   * @param \Drupal\Core\Language\LanguageDefault $language_default
+   *   The default language.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The configuration factory.
+   * @param \Drupal\language\LanguageNegotiatorInterface $language_negotiator
+   *   The language negotiator.
+   */
+  public function __construct(LanguageManagerInterface $language_manager, LanguageDefault $language_default, ConfigFactoryInterface $config_factory, LanguageNegotiatorInterface $language_negotiator) {
+    $this->languageManager = $language_manager;
+    $this->languageDefault = $language_default;
+    $this->configFactory = $config_factory;
+    $this->languageNegotiator = $language_negotiator;
+  }
+
+  /**
+   * Causes the container to be rebuilt on the next request.
+   *
+   * This event subscriber assumes that the new default langcode and old default
+   * langcode are valid langcodes. If the schema definition of either
+   * system.site:default_langcode or language.negotiation::url.prefixes changes
+   * then this event must be changed to work with both the old and new schema
+   * definition so this event is update safe.
+   *
+   * @param ConfigCrudEvent $event
+   *   The configuration event.
+   */
+  public function onConfigSave(ConfigCrudEvent $event) {
+    $saved_config = $event->getConfig();
+    if ($saved_config->getName() == 'system.site' && $event->isChanged('default_langcode')) {
+      $new_default_langcode = $saved_config->get('default_langcode');
+      $default_language = $this->configFactory->get('language.entity.' . $new_default_langcode);
+      // During an import the language might not exist yet.
+      if (!$default_language->isNew()) {
+        $this->languageDefault->set(new Language($default_language->get()));
+        $this->languageManager->reset();
+
+        // Directly update language negotiation settings instead of calling
+        // language_negotiation_url_prefixes_update() to ensure that the code
+        // obeys the hook_update_N() restrictions.
+        $negotiation_config = $this->configFactory->getEditable('language.negotiation');
+        $negotiation_changed = FALSE;
+        $url_prefixes = $negotiation_config->get('url.prefixes');
+        $old_default_langcode = $saved_config->getOriginal('default_langcode');
+        if (empty($url_prefixes[$old_default_langcode])) {
+          $negotiation_config->set('url.prefixes.' . $old_default_langcode, $old_default_langcode);
+          $negotiation_changed = TRUE;
+        }
+        if (empty($url_prefixes[$new_default_langcode])) {
+          $negotiation_config->set('url.prefixes.' . $new_default_langcode, '');
+          $negotiation_changed = TRUE;
+        }
+        if ($negotiation_changed) {
+          $negotiation_config->save(TRUE);
+        }
+      }
+      // Trigger a container rebuild on the next request by invalidating it.
+      ConfigurableLanguageManager::rebuildServices();
+    }
+    elseif ($saved_config->getName() == 'language.types' && $event->isChanged('negotiation')) {
+      // If the negotiation configuration changed the language negotiator and
+      // the language path processor have to be reset so that they regenerate
+      // the method instances and also sort them accordingly to the new config.
+      $this->languageNegotiator->reset();
+      if (isset($this->pathProcessorLanguage)) {
+        $this->pathProcessorLanguage->reset();
+      }
+    }
+  }
+
+  /**
+   * Injects the language path processors on multilingual site configuration.
+   *
+   * @param \Drupal\language\HttpKernel\PathProcessorLanguage $path_processor_language
+   *   The language path processor.
+   */
+  public function setPathProcessorLanguage(PathProcessorLanguage $path_processor_language) {
+    $this->pathProcessorLanguage = $path_processor_language;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    $events[ConfigEvents::SAVE][] = ['onConfigSave', 0];
+    return $events;
+  }
+
+}