aleph1.co.uk Git - yaffs-website/blob - web/core/lib/Drupal/Core/Language/ContextProvider/CurrentLanguageContext.php

   1 <?php
   2
   3 namespace Drupal\Core\Language\ContextProvider;
   4
   5 use Drupal\Core\Cache\CacheableMetadata;
   6 use Drupal\Core\Language\LanguageManagerInterface;
   7 use Drupal\Core\Plugin\Context\Context;
   8 use Drupal\Core\Plugin\Context\ContextDefinition;
   9 use Drupal\Core\Plugin\Context\ContextProviderInterface;
  10 use Drupal\Core\StringTranslation\StringTranslationTrait;
  11
  12 /**
  13  * Sets the current language as a context.
  14  */
  15 class CurrentLanguageContext implements ContextProviderInterface {
  16
  17   use StringTranslationTrait;
  18
  19   /**
  20    * The language manager.
  21    *
  22    * @var \Drupal\Core\Language\LanguageManagerInterface
  23    */
  24   protected $languageManager;
  25
  26   /**
  27    * Constructs a new CurrentLanguageContext.
  28    *
  29    * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
  30    *   The language manager.
  31    */
  32   public function __construct(LanguageManagerInterface $language_manager) {
  33     $this->languageManager = $language_manager;
  34   }
  35
  36   /**
  37    * {@inheritdoc}
  38    */
  39   public function getRuntimeContexts(array $unqualified_context_ids) {
  40     // Add a context for each language type.
  41     $language_types = $this->languageManager->getLanguageTypes();
  42     $info = $this->languageManager->getDefinedLanguageTypesInfo();
  43
  44     if ($unqualified_context_ids) {
  45       foreach ($unqualified_context_ids as $unqualified_context_id) {
  46         if (array_search($unqualified_context_id, $language_types) === FALSE) {
  47           unset($language_types[$unqualified_context_id]);
  48         }
  49       }
  50     }
  51
  52     $result = [];
  53     foreach ($language_types as $type_key) {
  54       if (isset($info[$type_key]['name'])) {
  55         $context = new Context(new ContextDefinition('language', $info[$type_key]['name']), $this->languageManager->getCurrentLanguage($type_key));
  56
  57         $cacheability = new CacheableMetadata();
  58         $cacheability->setCacheContexts(['languages:' . $type_key]);
  59         $context->addCacheableDependency($cacheability);
  60
  61         $result[$type_key] = $context;
  62       }
  63     }
  64
  65     return $result;
  66   }
  67
  68   /**
  69    * {@inheritdoc}
  70    */
  71   public function getAvailableContexts() {
  72     return $this->getRuntimeContexts([]);
  73   }
  74
  75 }