class RulesEventHandlerBase

abstract class RulesEventHandlerBase implements RulesEventHandlerInterface {
  
  /**
   * The event name.
   *
   * @var string
   */
  protected $eventName;
  
  /**
   * The event info.
   *
   * @var array
   */
  protected $eventInfo;
  
  /**
   * The event settings.
   *
   * @var array
   */
  protected $settings = array();
  
  /**
   * Implements RulesEventHandlerInterface::__construct().
   */
  public function __construct($event_name, $info) {
    $this->eventName = $event_name;
    $this->eventInfo = $info;
    $this->settings = $this->getDefaults();
  }
  
  /**
   * Implements RulesEventHandlerInterface::getSettings().
   */
  public function getSettings() {
    return $this->settings;
  }
  
  /**
   * Implements RulesEventHandlerInterface::setSettings().
   */
  public function setSettings(array $settings) {
    $this->settings = $settings + $this->getDefaults();
    return $this;
  }
  
  /**
   * Implements RulesEventHandlerInterface::validate().
   */
  public function validate() {
    // Nothing to check by default.
  }
  
  /**
   * Implements RulesEventHandlerInterface::extractFormValues().
   */
  public function extractFormValues(array &$form, array &$form_state) {
    foreach ($this->getDefaults() as $key => $setting) {
      $this->settings[$key] = isset($form_state['values'][$key]) ? $form_state['values'][$key] : $setting;
    }
  }
  
  /**
   * Implements RulesEventHandlerInterface::availableVariables().
   */
  public function availableVariables() {
    return isset($this->eventInfo['variables']) ? $this->eventInfo['variables'] : array();
  }
  
  /**
   * Implements RulesEventHandlerInterface::getEventName().
   */
  public function getEventName() {
    return $this->eventName;
  }
  
  /**
   * Implements RulesEventHandlerInterface::getEventInfo().
   */
  public function getEventInfo() {
    return $this->eventInfo;
  }

}