Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\language\Plugin\Condition;
Chris@0: 
Chris@0: use Drupal\Core\Condition\ConditionPluginBase;
Chris@0: use Drupal\Core\Form\FormStateInterface;
Chris@0: use Drupal\Core\Language\LanguageInterface;
Chris@0: use Drupal\Core\Language\LanguageManagerInterface;
Chris@0: use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
Chris@0: use Symfony\Component\DependencyInjection\ContainerInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides a 'Language' condition.
Chris@0:  *
Chris@0:  * @Condition(
Chris@0:  *   id = "language",
Chris@0:  *   label = @Translation("Language"),
Chris@18:  *   context_definitions = {
Chris@0:  *     "language" = @ContextDefinition("language", label = @Translation("Language"))
Chris@0:  *   }
Chris@0:  * )
Chris@0:  */
Chris@0: class Language extends ConditionPluginBase implements ContainerFactoryPluginInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The Language manager.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Language\LanguageManagerInterface
Chris@0:    */
Chris@0:   protected $languageManager;
Chris@0: 
Chris@0:   /**
Chris@0:    * Creates a new Language instance.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
Chris@0:    *   The language manager.
Chris@0:    * @param array $configuration
Chris@0:    *   The plugin configuration, i.e. an array with configuration values keyed
Chris@0:    *   by configuration option name. The special key 'context' may be used to
Chris@0:    *   initialize the defined contexts by setting it to an array of context
Chris@0:    *   values keyed by context names.
Chris@0:    * @param string $plugin_id
Chris@0:    *   The plugin_id for the plugin instance.
Chris@0:    * @param mixed $plugin_definition
Chris@0:    *   The plugin implementation definition.
Chris@0:    */
Chris@0:   public function __construct(LanguageManagerInterface $language_manager, array $configuration, $plugin_id, $plugin_definition) {
Chris@0:     parent::__construct($configuration, $plugin_id, $plugin_definition);
Chris@0:     $this->languageManager = $language_manager;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
Chris@0:     return new static(
Chris@0:       $container->get('language_manager'),
Chris@0:       $configuration,
Chris@0:       $plugin_id,
Chris@0:       $plugin_definition
Chris@0:     );
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
Chris@0:     if ($this->languageManager->isMultilingual()) {
Chris@0:       // Fetch languages.
Chris@0:       $languages = $this->languageManager->getLanguages();
Chris@0:       $langcodes_options = [];
Chris@0:       foreach ($languages as $language) {
Chris@0:         $langcodes_options[$language->getId()] = $language->getName();
Chris@0:       }
Chris@0:       $form['langcodes'] = [
Chris@0:         '#type' => 'checkboxes',
Chris@0:         '#title' => $this->t('Language selection'),
Chris@0:         '#default_value' => $this->configuration['langcodes'],
Chris@0:         '#options' => $langcodes_options,
Chris@0:         '#description' => $this->t('Select languages to enforce. If none are selected, all languages will be allowed.'),
Chris@0:       ];
Chris@0:     }
Chris@0:     else {
Chris@0:       $form['langcodes'] = [
Chris@0:         '#type' => 'value',
Chris@0:         '#default_value' => $this->configuration['langcodes'],
Chris@0:       ];
Chris@0:     }
Chris@0:     return parent::buildConfigurationForm($form, $form_state);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
Chris@0:     $this->configuration['langcodes'] = array_filter($form_state->getValue('langcodes'));
Chris@0:     parent::submitConfigurationForm($form, $form_state);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function summary() {
Chris@0:     $language_list = $this->languageManager->getLanguages(LanguageInterface::STATE_ALL);
Chris@0:     $selected = $this->configuration['langcodes'];
Chris@0:     // Reduce the language list to an array of language names.
Chris@0:     $language_names = array_reduce($language_list, function (&$result, $item) use ($selected) {
Chris@0:       // If the current item of the $language_list array is one of the selected
Chris@0:       // languages, add it to the $results array.
Chris@0:       if (!empty($selected[$item->getId()])) {
Chris@0:         $result[$item->getId()] = $item->getName();
Chris@0:       }
Chris@0:       return $result;
Chris@0:     }, []);
Chris@0: 
Chris@0:     // If we have more than one language selected, separate them by commas.
Chris@0:     if (count($this->configuration['langcodes']) > 1) {
Chris@0:       $languages = implode(', ', $language_names);
Chris@0:     }
Chris@0:     else {
Chris@0:       // If we have just one language just grab the only present value.
Chris@0:       $languages = array_pop($language_names);
Chris@0:     }
Chris@0:     if (!empty($this->configuration['negate'])) {
Chris@0:       return t('The language is not @languages.', ['@languages' => $languages]);
Chris@0:     }
Chris@0:     return t('The language is @languages.', ['@languages' => $languages]);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function evaluate() {
Chris@0:     if (empty($this->configuration['langcodes']) && !$this->isNegated()) {
Chris@0:       return TRUE;
Chris@0:     }
Chris@0: 
Chris@0:     $language = $this->getContextValue('language');
Chris@0:     // Language visibility settings.
Chris@0:     return !empty($this->configuration['langcodes'][$language->getId()]);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function defaultConfiguration() {
Chris@0:     return ['langcodes' => []] + parent::defaultConfiguration();
Chris@0:   }
Chris@0: 
Chris@0: }