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;
    }

}