<?php
// $Id: G2DrupalHelper.class,v 1.1 2008/02/10 22:39:51 profix898 Exp $

/**
 * Class G2DrupalHelper {}.
 */
class G2DrupalHelper {
    function registerEventListeners($listeners) {
        foreach ($listeners as $listener) {
            // Default path to event listener class
            if (!isset($listener['path'])) {
                $listener['path'] = drupal_get_path('module', 'gallery') .'/G2DrupalHelper.class';
            }
            // Store event parameters
            $listener['events'] = is_array($listener['events']) ? $listener['events'] : array($listener['events']);
            foreach ($listener['events'] as $event) {
                $params = isset($listener['params']) ? $listener['params'] : NULL;
                G2DrupalHelper::eventParams($event, $params);
            }
            // Register event listener
            $ret = GalleryCoreApi::registerFactoryImplementationForRequest(
                'GalleryEventListener',
                $listener['class'],
                'G2Drupal',
                $listener['path'],
                'G2Drupal',
                $listener['events']
            );
            // G2 register call failed
            if ($ret) {
                return $ret;
            }
        }
        
        return false;
    }
    
    function eventParams($event, $params = NULL) {
        static $storage = NULL;
        
        // Save event params
        if (isset($params)) {
            $storage[$event] = $params;
        }
        // Get event params
        if (isset($storage[$event])) {
            return $storage[$event];
        }
        
        return array();
    }
}

/**
 * Class G2DrupalSimpleThemeEventListener {}.
 */
class G2DrupalSimpleThemeEventListener /* extends GalleryEventListener */ {
    function handleEvent($event) {
        $eventParams = G2DrupalHelper::eventParams($event->getEventName());
        if (count($eventParams)) {
            return array(null, $eventParams);
        }
        
        return array(null, null);
    }
}

/**
 * Class G2DrupalPageCacheEventListener {}.
 */
class G2DrupalPageCacheEventListener /* extends GalleryEventListener */ {
    function handleEvent($event) {
        // Clear the page cache, so that the updated G2 item shows correctly
        cache_clear_all();
        
        return array(null, null);
    }
}