Issue #1856976 by andypost, Soul88, ACF, aspilicious, vijaycs85, dawehner: Convert language_count() to the state system.

core/core.services.yml

@@ -193,6 +193,7 @@ services:
     arguments: ['@event_dispatcher', '@service_container', '@controller_resolver']
   language_manager:
     class: Drupal\Core\Language\LanguageManager
+    arguments: ['@state']
   string_translator.custom_strings:
     class: Drupal\Core\StringTranslation\Translator\CustomStrings
     tags:

core/includes/bootstrap.inc

@@ -2430,10 +2430,7 @@ function language_types_get_default() {
  *   TRUE if more than one language is enabled.
  */
 function language_multilingual() {
-  // The "language_count" variable stores the number of enabled languages to
+  return Drupal::languageManager()->isMultilingual();
-  // avoid unnecessarily querying the database when building the list of
-  // enabled languages on monolingual sites.
-  return variable_get('language_count', 1) > 1;
 }
 
 /**

core/includes/install.core.inc

@@ -386,7 +386,9 @@ function install_begin_request(&$install_state) {
       ->addArgument(new Reference('config.context'));
 
     // Register the 'language_manager' service.
-    $container->register('language_manager', 'Drupal\Core\Language\LanguageManager');
+    $container
+      ->register('language_manager', 'Drupal\Core\Language\LanguageManager')
+      ->addArgument(NULL);
 
     // Register the translation services.
     install_register_translation_service($container);

core/includes/update.inc

@@ -511,7 +511,7 @@ function update_prepare_d8_language() {
     db_drop_field('languages', 'enabled');
 
     // Update language count.
-    variable_set('language_count', db_query('SELECT COUNT(language) FROM {languages}')->fetchField());
+    Drupal::state()->set('language_count', db_query('SELECT COUNT(language) FROM {languages}')->fetchField());
 
     // Rename the languages table to language.
     db_rename_table('languages', 'language');

core/lib/Drupal/Core/Language/LanguageManager.php

@@ -8,6 +8,7 @@
 namespace Drupal\Core\Language;
 
 use Symfony\Component\HttpFoundation\Request;
+use Drupal\Core\KeyValueStore\KeyValueStoreInterface;
 
 /**
  * Class responsible for initializing each language type.
@@ -21,6 +22,13 @@ class LanguageManager {
    */
   protected $request;
 
+  /**
+   * The Key/Value Store to use for state.
+   *
+   * @var \Drupal\Core\KeyValueStore\KeyValueStoreInterface
+   */
+  protected $state = NULL;
+
   /**
    * An array of language objects keyed by language type.
    *
@@ -45,6 +53,16 @@ class LanguageManager {
    */
   protected $initializing = FALSE;
 
+  /**
+   * Constructs an LanguageManager object.
+   *
+   * @param \Drupal\Core\KeyValueStore\KeyValueStoreInterface $state
+   *   The state keyvalue store.
+   */
+  public function __construct(KeyValueStoreInterface $state = NULL) {
+    $this->state = $state;
+  }
+
   /**
    * Initializes each language type to a language object.
    */
@@ -136,7 +154,11 @@ class LanguageManager {
    *   TRUE if more than one language is enabled, FALSE otherwise.
    */
   public function isMultilingual() {
-    return variable_get('language_count', 1) > 1;
+    if (!isset($this->state)) {
+      // No state service in install time.
+      return FALSE;
+    }
+    return ($this->state->get('language_count') ?: 1) > 1;
   }
 
   /**
@@ -152,7 +174,7 @@ class LanguageManager {
   /**
    * Returns a language object representing the site's default language.
    *
-   * @return Drupal\Core\Language\Language
+   * @return \Drupal\Core\Language\Language
    *   A language object.
    */
   protected function getLanguageDefault() {

core/modules/language/language.install

@@ -29,7 +29,7 @@ function language_install() {
 function language_uninstall() {
   // Clear variables.
   variable_del('language_default');
-  variable_del('language_count');
+  Drupal::state()->delete('language_count');
 
   // Clear variables.
   variable_del('language_types');
@@ -51,7 +51,7 @@ function language_uninstall() {
  */
 function language_enable() {
   // Update the language count, if the module was disabled before, the
-  // language_count variable was forced to 1.
+  // language_count state was forced to 1.
   language_update_count();
 }
 
@@ -59,10 +59,10 @@ function language_enable() {
  * Implements hook_disable().
  */
 function language_disable() {
-  // Force the language_count variable to be 1, so that the when checking if the
+  // Force the language_count state to be 1, so that the when checking if the
   // site is multilingual (for example in language_multilingual()), the result
   // will be FALSE, because the language module is disabled.
-  variable_set('language_count', 1);
+  Drupal::state()->set('language_count', 1);
 }
 
 /**

core/modules/language/language.module

@@ -522,15 +522,15 @@ function language_save($language) {
     variable_set('language_default', (array) $language);
   }
 
+  // Kill the static cache in language_list().
+  drupal_static_reset('language_list');
+
   // Update language count based on unlocked language count.
   language_update_count();
 
   // Update weight of locked system languages.
   language_update_locked_weights();
 
-  // Kill the static cache in language_list().
-  drupal_static_reset('language_list');
-
   language_negotiation_include();
 
   // Update URL Prefixes for all languages after the new default language is
@@ -541,7 +541,7 @@ function language_save($language) {
 }
 
 /**
- * Updates the language_count variable.
+ * Updates the language_count state.
  *
  * This is used to check if a site is multilingual or not.
  *
@@ -554,7 +554,7 @@ function language_update_count() {
       $count++;
     }
   }
-  variable_set('language_count', $count);
+  Drupal::state()->set('language_count', $count);
 }
 
 /**
@@ -576,13 +576,13 @@ function language_delete($langcode) {
     // Remove the language.
     entity_delete_multiple('language_entity', array($language->id));
 
+    drupal_static_reset('language_list');
+
     language_update_count();
 
     // Update weight of locked system languages.
     language_update_locked_weights();
 
-    drupal_static_reset('language_list');
-
     $t_args = array('%language' => $language->name, '%langcode' => $language->id);
     watchdog('language', 'The %language (%langcode) language has been removed.', $t_args);
     return TRUE;

core/modules/language/lib/Drupal/language/Tests/LanguageListTest.php

@@ -116,10 +116,11 @@ class LanguageListTest extends WebTestBase {
     // Verify that language is no longer found.
     $this->drupalGet('admin/config/regional/language/delete/' . $langcode);
     $this->assertResponse(404, 'Language no longer found.');
-    // Make sure the "language_count" variable has been updated correctly.
+    // Make sure the "language_count" state has been updated correctly.
     drupal_static_reset('language_list');
     $languages = language_list();
-    $this->assertEqual(variable_get('language_count', 1), count($languages), 'Language count is correct.');
+    $language_count =  $this->container->get('state')->get('language_count') ?: 1;
+    $this->assertEqual($language_count, count($languages), 'Language count is correct.');
     // Delete French.
     $this->drupalPost('admin/config/regional/language/delete/fr', array(), t('Delete'));
     // Get the count of languages.
@@ -132,8 +133,9 @@ class LanguageListTest extends WebTestBase {
     // Verify that language is no longer found.
     $this->drupalGet('admin/config/regional/language/delete/fr');
     $this->assertResponse(404, 'Language no longer found.');
-    // Make sure the "language_count" variable has not changed.
+    // Make sure the "language_count" state has not changed.
-    $this->assertEqual(variable_get('language_count', 1), count($languages), 'Language count is correct.');
+    $language_count = $this->container->get('state')->get('language_count') ?: 1;
+    $this->assertEqual($language_count, count($languages), 'Language count is correct.');
 
     // Ensure we can delete the English language. Right now English is the only
     // language so we must add a new language and make it the default before

core/modules/locale/lib/Drupal/locale/Tests/LocaleUninstallTest.php

@@ -87,7 +87,7 @@ class LocaleUninstallTest extends WebTestBase {
     $this->drupalPost('admin/config/regional/translate', $edit, t('Save translations'));
     _locale_rebuild_js('fr');
     $config = config('locale.settings');
-    $locale_javascripts = \Drupal::state()->get('locale.translation.javascript') ?: array();
+    $locale_javascripts = $this->container->get('state')->get('locale.translation.javascript') ?: array();
     $js_file = 'public://' . $config->get('javascript.directory') . '/fr_' . $locale_javascripts['fr'] . '.js';
     $this->assertTrue($result = file_exists($js_file), t('JavaScript file created: %file', array('%file' => $result ? $js_file : t('none'))));
 
@@ -121,7 +121,7 @@ class LocaleUninstallTest extends WebTestBase {
     $this->assertTrue($result = !file_exists($js_file), t('JavaScript file deleted: %file', array('%file' => $result ? $js_file : t('found'))));
 
     // Check language count.
-    $language_count = variable_get('language_count', 1);
+    $language_count = $this->container->get('state')->get('language_count') ?: 1;
     $this->assertEqual($language_count, 1, t('Language count: %count', array('%count' => $language_count)));
 
     // Check language negotiation.
@@ -139,7 +139,7 @@ class LocaleUninstallTest extends WebTestBase {
     $this->assertFalse(config('language.negotiation')->get('session.parameter'), t('Visit language negotiation method settings cleared.'));
 
     // Check JavaScript parsed.
-    $javascript_parsed_count = count(\Drupal::state()->get('system.javascript_parsed') ?: array());
+    $javascript_parsed_count = count($this->container->get('state')->get('system.javascript_parsed') ?: array());
     $this->assertEqual($javascript_parsed_count, 0, t('JavaScript parsed count: %count', array('%count' => $javascript_parsed_count)));
   }
 }