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1 <?php
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2
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3 namespace Drupal\language\EventSubscriber;
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4
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5 use Drupal\Core\DrupalKernelInterface;
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6 use Drupal\Core\Session\AccountInterface;
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7 use Drupal\Core\StringTranslation\Translator\TranslatorInterface;
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8 use Drupal\language\ConfigurableLanguageManagerInterface;
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9 use Drupal\language\LanguageNegotiatorInterface;
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10 use Symfony\Component\HttpKernel\KernelEvents;
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11 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
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12 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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13
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14 /**
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15 * Sets the $request property on the language manager.
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16 */
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17 class LanguageRequestSubscriber implements EventSubscriberInterface {
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18
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19 /**
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20 * The language manager service.
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21 *
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22 * @var \Drupal\language\ConfigurableLanguageManagerInterface
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23 */
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24 protected $languageManager;
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25
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26 /**
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27 * The language negotiator.
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28 *
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29 * @var \Drupal\language\LanguageNegotiatorInterface
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30 */
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31 protected $negotiator;
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32
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33 /**
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34 * The translation service.
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35 *
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36 * @var \Drupal\Core\StringTranslation\Translator\TranslatorInterface
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37 */
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38 protected $translation;
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39
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40 /**
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41 * The current active user.
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42 *
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43 * @var \Drupal\Core\Session\AccountInterface
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44 */
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45 protected $currentUser;
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46
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47 /**
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48 * Constructs a LanguageRequestSubscriber object.
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49 *
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50 * @param \Drupal\language\ConfigurableLanguageManagerInterface $language_manager
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51 * The language manager service.
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52 * @param \Drupal\language\LanguageNegotiatorInterface $negotiator
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53 * The language negotiator.
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54 * @param \Drupal\Core\StringTranslation\Translator\TranslatorInterface $translation
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55 * The translation service.
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56 * @param \Drupal\Core\Session\AccountInterface $current_user
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57 * The current active user.
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58 */
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59 public function __construct(ConfigurableLanguageManagerInterface $language_manager, LanguageNegotiatorInterface $negotiator, TranslatorInterface $translation, AccountInterface $current_user) {
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60 $this->languageManager = $language_manager;
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61 $this->negotiator = $negotiator;
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62 $this->translation = $translation;
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63 $this->currentUser = $current_user;
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64 }
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65
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66 /**
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67 * Initializes the language manager at the beginning of the request.
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68 *
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69 * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event
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70 * The Event to process.
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71 */
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72 public function onKernelRequestLanguage(GetResponseEvent $event) {
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73 if ($event->isMasterRequest()) {
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74 $this->setLanguageOverrides();
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75 }
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76 }
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77
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78 /**
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79 * Initializes config overrides whenever the service container is rebuilt.
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80 */
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81 public function onContainerInitializeSubrequestFinished() {
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82 $this->setLanguageOverrides();
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83 }
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84
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85 /**
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86 * Sets the language for config overrides on the language manager.
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87 */
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88 private function setLanguageOverrides() {
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89 $this->negotiator->setCurrentUser($this->currentUser);
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90 if ($this->languageManager instanceof ConfigurableLanguageManagerInterface) {
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91 $this->languageManager->setNegotiator($this->negotiator);
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92 $this->languageManager->setConfigOverrideLanguage($this->languageManager->getCurrentLanguage());
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93 }
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94 // After the language manager has initialized, set the default langcode for
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95 // the string translations.
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96 $langcode = $this->languageManager->getCurrentLanguage()->getId();
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97 $this->translation->setDefaultLangcode($langcode);
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98 }
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99
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100 /**
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101 * Registers the methods in this class that should be listeners.
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102 *
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103 * @return array
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104 * An array of event listener definitions.
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105 */
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106 public static function getSubscribedEvents() {
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107 $events[KernelEvents::REQUEST][] = ['onKernelRequestLanguage', 255];
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108 $events[DrupalKernelInterface::CONTAINER_INITIALIZE_SUBREQUEST_FINISHED][] = ['onContainerInitializeSubrequestFinished', 255];
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109
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110 return $events;
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111 }
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112
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113 }
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