Move into nested docroot

web/core/modules/locale/src/LocaleConfigSubscriber.php

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+<?php
+
+namespace Drupal\locale;
+
+use Drupal\Core\Config\ConfigCrudEvent;
+use Drupal\Core\Config\ConfigEvents;
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Config\StorableConfigBase;
+use Drupal\language\Config\LanguageConfigOverrideCrudEvent;
+use Drupal\language\Config\LanguageConfigOverrideEvents;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * Updates strings translation when configuration translations change.
+ *
+ * This reacts to the updates of translated active configuration and
+ * configuration language overrides. When those updates involve configuration
+ * which was available as default configuration, we need to feed back changes
+ * to any item which was originally part of that configuration to the interface
+ * translation storage. Those updated translations are saved as customized, so
+ * further community translation updates will not undo user changes.
+ *
+ * This subscriber does not respond to deleting active configuration or deleting
+ * configuration translations. The locale storage is additive and we cannot be
+ * sure that only a given configuration translation used a source string. So
+ * we should not remove the translations from locale storage in these cases. The
+ * configuration or override would itself be deleted either way.
+ *
+ * By design locale module only deals with sources in English.
+ *
+ * @see \Drupal\locale\LocaleConfigManager
+ */
+class LocaleConfigSubscriber implements EventSubscriberInterface {
+
+  /**
+   * The configuration factory.
+   *
+   * @var \Drupal\Core\Config\ConfigFactoryInterface
+   */
+  protected $configFactory;
+
+  /**
+   * The typed configuration manager.
+   *
+   * @var \Drupal\locale\LocaleConfigManager
+   */
+  protected $localeConfigManager;
+
+  /**
+   * Constructs a LocaleConfigSubscriber.
+   *
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The configuration factory.
+   * @param \Drupal\locale\LocaleConfigManager $locale_config_manager
+   *   The typed configuration manager.
+   */
+  public function __construct(ConfigFactoryInterface $config_factory, LocaleConfigManager $locale_config_manager) {
+    $this->configFactory = $config_factory;
+    $this->localeConfigManager = $locale_config_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    $events[LanguageConfigOverrideEvents::SAVE_OVERRIDE] = 'onOverrideChange';
+    $events[LanguageConfigOverrideEvents::DELETE_OVERRIDE] = 'onOverrideChange';
+    $events[ConfigEvents::SAVE] = 'onConfigSave';
+    return $events;
+  }
+
+  /**
+   * Updates the locale strings when a translated active configuration is saved.
+   *
+   * @param \Drupal\Core\Config\ConfigCrudEvent $event
+   *   The configuration event.
+   */
+  public function onConfigSave(ConfigCrudEvent $event) {
+    // Only attempt to feed back configuration translation changes to locale if
+    // the update itself was not initiated by locale data changes.
+    if (!drupal_installation_attempted() && !$this->localeConfigManager->isUpdatingTranslationsFromLocale()) {
+      $config = $event->getConfig();
+      $langcode = $config->get('langcode') ?: 'en';
+      $this->updateLocaleStorage($config, $langcode);
+    }
+  }
+
+  /**
+   * Updates the locale strings when a configuration override is saved/deleted.
+   *
+   * @param \Drupal\language\Config\LanguageConfigOverrideCrudEvent $event
+   *   The language configuration event.
+   */
+  public function onOverrideChange(LanguageConfigOverrideCrudEvent $event) {
+    // Only attempt to feed back configuration override changes to locale if
+    // the update itself was not initiated by locale data changes.
+    if (!drupal_installation_attempted() && !$this->localeConfigManager->isUpdatingTranslationsFromLocale()) {
+      $translation_config = $event->getLanguageConfigOverride();
+      $langcode = $translation_config->getLangcode();
+      $reference_config = $this->configFactory->getEditable($translation_config->getName())->get();
+      $this->updateLocaleStorage($translation_config, $langcode, $reference_config);
+    }
+  }
+
+  /**
+   * Update locale storage based on configuration translations.
+   *
+   * @param \Drupal\Core\Config\StorableConfigBase $config
+   *   Active configuration or configuration translation override.
+   * @param string $langcode
+   *   The language code of $config.
+   * @param array $reference_config
+   *   (Optional) Reference configuration to check against if $config was an
+   *   override. This allows us to update locale keys for data not in the
+   *   override but still in the active configuration.
+   */
+  protected function updateLocaleStorage(StorableConfigBase $config, $langcode, array $reference_config = array()) {
+    $name = $config->getName();
+    if ($this->localeConfigManager->isSupported($name) && locale_is_translatable($langcode)) {
+      $translatables = $this->localeConfigManager->getTranslatableDefaultConfig($name);
+      $this->processTranslatableData($name, $config->get(), $translatables, $langcode, $reference_config);
+    }
+  }
+
+  /**
+   * Process the translatable data array with a given language.
+   *
+   * @param string $name
+   *   The configuration name.
+   * @param array $config
+   *   The active configuration data or override data.
+   * @param array|\Drupal\Core\StringTranslation\TranslatableMarkup[] $translatable
+   *   The translatable array structure.
+   *   @see \Drupal\locale\LocaleConfigManager::getTranslatableData()
+   * @param string $langcode
+   *   The language code to process the array with.
+   * @param array $reference_config
+   *   (Optional) Reference configuration to check against if $config was an
+   *   override. This allows us to update locale keys for data not in the
+   *   override but still in the active configuration.
+   */
+  protected function processTranslatableData($name, array $config, array $translatable, $langcode, array $reference_config = array()) {
+    foreach ($translatable as $key => $item) {
+      if (!isset($config[$key])) {
+        if (isset($reference_config[$key])) {
+          $this->resetExistingTranslations($name, $translatable[$key], $reference_config[$key], $langcode);
+        }
+        continue;
+      }
+      if (is_array($item)) {
+        $reference_config = isset($reference_config[$key]) ? $reference_config[$key] : array();
+        $this->processTranslatableData($name, $config[$key], $item, $langcode, $reference_config);
+      }
+      else {
+        $this->saveCustomizedTranslation($name, $item->getUntranslatedString(), $item->getOption('context'), $config[$key], $langcode);
+      }
+    }
+  }
+
+  /**
+   * Reset existing locale translations to their source values.
+   *
+   * Goes through $translatable to reset any existing translations to the source
+   * string, so prior translations would not reappear in the configuration.
+   *
+   * @param string $name
+   *   The configuration name.
+   * @param array|\Drupal\Core\StringTranslation\TranslatableMarkup $translatable
+   *   Either a possibly nested array with TranslatableMarkup objects at the
+   *   leaf items or a TranslatableMarkup object directly.
+   * @param array|string $reference_config
+   *   Either a possibly nested array with strings at the leaf items or a string
+   *   directly. Only those $translatable items that are also present in
+   *   $reference_config will get translations reset.
+   * @param string $langcode
+   *   The language code of the translation being processed.
+   */
+  protected function resetExistingTranslations($name, $translatable, $reference_config, $langcode) {
+    if (is_array($translatable)) {
+      foreach ($translatable as $key => $item) {
+        if (isset($reference_config[$key])) {
+          // Process further if the key still exists in the reference active
+          // configuration and the default translation but not the current
+          // configuration override.
+          $this->resetExistingTranslations($name, $item, $reference_config[$key], $langcode);
+        }
+      }
+    }
+    elseif (!is_array($reference_config)) {
+      $this->saveCustomizedTranslation($name, $translatable->getUntranslatedString(), $translatable->getOption('context'), $reference_config, $langcode);
+    }
+  }
+
+  /**
+   * Saves a translation string and marks it as customized.
+   *
+   * @param string $name
+   *   The configuration name.
+   * @param string $source
+   *   The source string value.
+   * @param string $context
+   *   The source string context.
+   * @param string $new_translation
+   *   The translation string.
+   * @param string $langcode
+   *   The language code of the translation.
+   */
+  protected function saveCustomizedTranslation($name, $source, $context, $new_translation, $langcode) {
+    $locale_translation = $this->localeConfigManager->getStringTranslation($name, $langcode, $source, $context);
+    if (!empty($locale_translation)) {
+      // Save this translation as custom if it was a new translation and not the
+      // same as the source. (The interface prefills translation values with the
+      // source). Or if there was an existing (non-empty) translation and the
+      // user changed it (even if it was changed back to the original value).
+      // Otherwise the translation file would be overwritten with the locale
+      // copy again later.
+      $existing_translation = $locale_translation->getString();
+      if (($locale_translation->isNew() && $source != $new_translation) ||
+        (!$locale_translation->isNew() && ((empty($existing_translation) && $source != $new_translation) || ((!empty($existing_translation) && $new_translation != $existing_translation))))) {
+        $locale_translation
+          ->setString($new_translation)
+          ->setCustomized(TRUE)
+          ->save();
+      }
+    }
+  }
+
+}