Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\language\HttpKernel;
Chris@0: 
Chris@0: use Drupal\Component\Utility\Unicode;
Chris@0: use Drupal\Core\Config\ConfigFactoryInterface;
Chris@0: use Drupal\Core\PathProcessor\InboundPathProcessorInterface;
Chris@0: use Drupal\Core\PathProcessor\OutboundPathProcessorInterface;
Chris@0: use Drupal\Core\Render\BubbleableMetadata;
Chris@0: use Drupal\language\ConfigurableLanguageManagerInterface;
Chris@0: use Drupal\language\EventSubscriber\ConfigSubscriber;
Chris@0: use Drupal\language\LanguageNegotiatorInterface;
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@0: use Drupal\Core\Session\AccountInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Processes the inbound path using path alias lookups.
Chris@0:  */
Chris@0: class PathProcessorLanguage implements InboundPathProcessorInterface, OutboundPathProcessorInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * A config factory for retrieving required config settings.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Config\ConfigFactoryInterface
Chris@0:    */
Chris@0:   protected $config;
Chris@0: 
Chris@0:   /**
Chris@0:    * Language manager for retrieving the url language type.
Chris@0:    *
Chris@0:    * @var \Drupal\language\ConfigurableLanguageManagerInterface
Chris@0:    */
Chris@0:   protected $languageManager;
Chris@0: 
Chris@0:   /**
Chris@0:    * The language negotiator.
Chris@0:    *
Chris@0:    * @var \Drupal\language\LanguageNegotiatorInterface
Chris@0:    */
Chris@0:   protected $negotiator;
Chris@0: 
Chris@0:   /**
Chris@0:    * Local cache for language path processors.
Chris@0:    *
Chris@0:    * @var array
Chris@0:    */
Chris@0:   protected $processors;
Chris@0: 
Chris@0:   /**
Chris@0:    * Flag indicating whether the site is multilingual.
Chris@0:    *
Chris@0:    * @var bool
Chris@0:    */
Chris@0:   protected $multilingual;
Chris@0: 
Chris@0:   /**
Chris@0:    * The language configuration event subscriber.
Chris@0:    *
Chris@0:    * @var \Drupal\language\EventSubscriber\ConfigSubscriber
Chris@0:    */
Chris@0:   protected $configSubscriber;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a PathProcessorLanguage object.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Config\ConfigFactoryInterface $config
Chris@0:    *   A config factory object for retrieving configuration settings.
Chris@0:    * @param \Drupal\language\ConfigurableLanguageManagerInterface $language_manager
Chris@0:    *   The configurable language manager.
Chris@0:    * @param \Drupal\language\LanguageNegotiatorInterface $negotiator
Chris@0:    *   The language negotiator.
Chris@0:    * @param \Drupal\Core\Session\AccountInterface $current_user
Chris@0:    *   The current active user.
Chris@0:    * @param \Drupal\language\EventSubscriber\ConfigSubscriber $config_subscriber
Chris@0:    *   The language configuration event subscriber.
Chris@0:    */
Chris@0:   public function __construct(ConfigFactoryInterface $config, ConfigurableLanguageManagerInterface $language_manager, LanguageNegotiatorInterface $negotiator, AccountInterface $current_user, ConfigSubscriber $config_subscriber) {
Chris@0:     $this->config = $config;
Chris@0:     $this->languageManager = $language_manager;
Chris@0:     $this->negotiator = $negotiator;
Chris@0:     $this->negotiator->setCurrentUser($current_user);
Chris@0:     $this->configSubscriber = $config_subscriber;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function processInbound($path, Request $request) {
Chris@0:     if (!empty($path)) {
Chris@0:       $scope = 'inbound';
Chris@0:       if (!isset($this->processors[$scope])) {
Chris@0:         $this->initProcessors($scope);
Chris@0:       }
Chris@0:       foreach ($this->processors[$scope] as $instance) {
Chris@0:         $path = $instance->processInbound($path, $request);
Chris@0:       }
Chris@0:     }
Chris@0:     return $path;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
Chris@0:     if (!isset($this->multilingual)) {
Chris@0:       $this->multilingual = $this->languageManager->isMultilingual();
Chris@0:     }
Chris@0:     if ($this->multilingual) {
Chris@0:       $this->negotiator->reset();
Chris@0:       $scope = 'outbound';
Chris@0:       if (!isset($this->processors[$scope])) {
Chris@0:         $this->initProcessors($scope);
Chris@0:       }
Chris@0:       foreach ($this->processors[$scope] as $instance) {
Chris@0:         $path = $instance->processOutbound($path, $options, $request, $bubbleable_metadata);
Chris@0:       }
Chris@0:       // No language dependent path allowed in this mode.
Chris@0:       if (empty($this->processors[$scope])) {
Chris@0:         unset($options['language']);
Chris@0:       }
Chris@0:     }
Chris@0:     return $path;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Initializes the local cache for language path processors.
Chris@0:    *
Chris@0:    * @param string $scope
Chris@0:    *   The scope of the processors: "inbound" or "outbound".
Chris@0:    */
Chris@0:   protected function initProcessors($scope) {
Chris@0:     $interface = '\Drupal\Core\PathProcessor\\' . Unicode::ucfirst($scope) . 'PathProcessorInterface';
Chris@0:     $this->processors[$scope] = [];
Chris@0:     $weights = [];
Chris@0:     foreach ($this->languageManager->getLanguageTypes() as $type) {
Chris@0:       foreach ($this->negotiator->getNegotiationMethods($type) as $method_id => $method) {
Chris@0:         if (!isset($this->processors[$scope][$method_id])) {
Chris@0:           $reflector = new \ReflectionClass($method['class']);
Chris@0:           if ($reflector->implementsInterface($interface)) {
Chris@0:             $this->processors[$scope][$method_id] = $this->negotiator->getNegotiationMethodInstance($method_id);
Chris@0:             $weights[$method_id] = $method['weight'];
Chris@0:           }
Chris@0:         }
Chris@0:       }
Chris@0:     }
Chris@0: 
Chris@0:     // Sort the processors list, so that their functions are called in the
Chris@0:     // order specified by the weight of the methods.
Chris@0:     uksort($this->processors[$scope], function ($method_id_a, $method_id_b) use ($weights) {
Chris@0:       $a_weight = $weights[$method_id_a];
Chris@0:       $b_weight = $weights[$method_id_b];
Chris@0: 
Chris@0:       if ($a_weight == $b_weight) {
Chris@0:         return 0;
Chris@0:       }
Chris@0: 
Chris@0:       return ($a_weight < $b_weight) ? -1 : 1;
Chris@0:     });
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Initializes the injected event subscriber with the language path processor.
Chris@0:    *
Chris@0:    * The language path processor service is registered only on multilingual
Chris@0:    * site configuration, thus we inject it in the event subscriber only when
Chris@0:    * it is initialized.
Chris@0:    */
Chris@0:   public function initConfigSubscriber() {
Chris@0:     $this->configSubscriber->setPathProcessorLanguage($this);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Resets the collected processors instances.
Chris@0:    */
Chris@0:   public function reset() {
Chris@0:     $this->processors = [];
Chris@0:   }
Chris@0: 
Chris@0: }