Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\Plugin;
Chris@0: 
Chris@0: use Drupal\Component\Plugin\Definition\PluginDefinitionInterface;
Chris@0: use Drupal\Component\Plugin\DependentPluginInterface;
Chris@0: use Drupal\Component\Plugin\PluginInspectionInterface;
Chris@0: use Drupal\Core\Entity\DependencyTrait;
Chris@0: use Drupal\Core\Plugin\Definition\DependentPluginDefinitionInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides a trait for calculating the dependencies of a plugin.
Chris@0:  */
Chris@0: trait PluginDependencyTrait {
Chris@0: 
Chris@0:   use DependencyTrait;
Chris@0: 
Chris@0:   /**
Chris@0:    * Calculates and adds dependencies of a specific plugin instance.
Chris@0:    *
Chris@0:    * Dependencies are added for the module that provides the plugin, as well
Chris@0:    * as any dependencies declared by the instance's calculateDependencies()
Chris@0:    * method, if it implements
Chris@0:    * \Drupal\Component\Plugin\DependentPluginInterface.
Chris@0:    *
Chris@0:    * @param \Drupal\Component\Plugin\PluginInspectionInterface $instance
Chris@0:    *   The plugin instance.
Chris@0:    */
Chris@0:   protected function calculatePluginDependencies(PluginInspectionInterface $instance) {
Chris@0:     $definition = $instance->getPluginDefinition();
Chris@0: 
Chris@0:     if ($definition instanceof PluginDefinitionInterface) {
Chris@0:       $this->addDependency('module', $definition->getProvider());
Chris@0:       if ($definition instanceof DependentPluginDefinitionInterface && $config_dependencies = $definition->getConfigDependencies()) {
Chris@0:         $this->addDependencies($config_dependencies);
Chris@0:       }
Chris@0:     }
Chris@0:     elseif (is_array($definition)) {
Chris@0:       $this->addDependency('module', $definition['provider']);
Chris@0:       // Plugins can declare additional dependencies in their definition.
Chris@0:       if (isset($definition['config_dependencies'])) {
Chris@0:         $this->addDependencies($definition['config_dependencies']);
Chris@0:       }
Chris@0:     }
Chris@0: 
Chris@0:     // If a plugin is dependent, calculate its dependencies.
Chris@0:     if ($instance instanceof DependentPluginInterface && $plugin_dependencies = $instance->calculateDependencies()) {
Chris@0:       $this->addDependencies($plugin_dependencies);
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0: }