Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\Condition;
Chris@0: 
Chris@0: use Drupal\Component\Plugin\CategorizingPluginManagerInterface;
Chris@0: use Drupal\Core\Cache\CacheBackendInterface;
Chris@0: use Drupal\Core\Executable\ExecutableManagerInterface;
Chris@0: use Drupal\Core\Executable\ExecutableInterface;
Chris@0: use Drupal\Core\Extension\ModuleHandlerInterface;
Chris@0: use Drupal\Core\Plugin\CategorizingPluginManagerTrait;
Chris@0: use Drupal\Core\Plugin\DefaultPluginManager;
Chris@17: use Drupal\Core\Plugin\FilteredPluginManagerInterface;
Chris@17: use Drupal\Core\Plugin\FilteredPluginManagerTrait;
Chris@0: 
Chris@0: /**
Chris@0:  * A plugin manager for condition plugins.
Chris@0:  *
Chris@0:  * @see \Drupal\Core\Condition\Annotation\Condition
Chris@0:  * @see \Drupal\Core\Condition\ConditionInterface
Chris@0:  * @see \Drupal\Core\Condition\ConditionPluginBase
Chris@0:  *
Chris@0:  * @ingroup plugin_api
Chris@0:  */
Chris@17: class ConditionManager extends DefaultPluginManager implements ExecutableManagerInterface, CategorizingPluginManagerInterface, FilteredPluginManagerInterface {
Chris@0: 
Chris@0:   use CategorizingPluginManagerTrait;
Chris@17:   use FilteredPluginManagerTrait;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a ConditionManager object.
Chris@0:    *
Chris@0:    * @param \Traversable $namespaces
Chris@0:    *   An object that implements \Traversable which contains the root paths
Chris@0:    *   keyed by the corresponding namespace to look for plugin implementations.
Chris@0:    * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
Chris@0:    *   Cache backend instance to use.
Chris@0:    * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
Chris@0:    *   The module handler to invoke the alter hook with.
Chris@0:    */
Chris@0:   public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
Chris@0:     $this->alterInfo('condition_info');
Chris@0:     $this->setCacheBackend($cache_backend, 'condition_plugins');
Chris@0: 
Chris@0:     parent::__construct('Plugin/Condition', $namespaces, $module_handler, 'Drupal\Core\Condition\ConditionInterface', 'Drupal\Core\Condition\Annotation\Condition');
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@17:   protected function getType() {
Chris@17:     return 'condition';
Chris@17:   }
Chris@17: 
Chris@17:   /**
Chris@17:    * {@inheritdoc}
Chris@17:    */
Chris@0:   public function createInstance($plugin_id, array $configuration = []) {
Chris@0:     $plugin = $this->getFactory()->createInstance($plugin_id, $configuration);
Chris@0: 
Chris@0:     // If we receive any context values via config set it into the plugin.
Chris@0:     if (!empty($configuration['context'])) {
Chris@0:       foreach ($configuration['context'] as $name => $context) {
Chris@0:         $plugin->setContextValue($name, $context);
Chris@0:       }
Chris@0:     }
Chris@0: 
Chris@0:     return $plugin->setExecutableManager($this);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function execute(ExecutableInterface $condition) {
Chris@0:     $result = $condition->evaluate();
Chris@0:     return $condition->isNegated() ? !$result : $result;
Chris@0:   }
Chris@0: 
Chris@0: }