<?php
/*
 * $RCSfile: module.inc,v $
 *
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2005 Bharat Mediratta
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
 */

/**
 * The implementation of the moderation-module
 * @package Moderation
 * @author Emanuele Pedrona <e.pedrona@edronsoft.com>
 * @version $Revision: 1861 $ $Date: 2006/04/21 20:28:14 $
 */
class ModerateModule extends GalleryModule {

    function ModerateModule() {
	global $gallery;

	$this->setId('moderate');
	$this->setName($gallery->i18n('Moderate'));
	$this->setDescription($gallery->i18n('User/Moderation'));
	$this->setVersion('1.1.0');
	$this->setGroup('gallery', $gallery->i18n('Gallery'));
	$this->setCallbacks('registerEventListeners|getSiteAdminViews');
	$this->setRequiredCoreApi(array(7, 0));
	$this->setRequiredModuleApi(array(3, 0));
    }

    /**
     * @see GalleryModule::registerEventListeners
     */
    function registerEventListeners() {
	GalleryCoreApi::registerEventListener('GalleryEntity::delete', new ModerateModule());
    }

    /**
     * @see GalleryModule::getSiteAdminViews
     */
    function getSiteAdminViews() {
	return array(null,
		     array(array('name' => 'Moderate',
				 'view' => 'moderate.AdminModeration')));
    }

    /**
     * @see GalleryModule::performFactoryRegistrations()
     */
    function performFactoryRegistrations() {
	$ret = GalleryCoreApi::registerFactoryImplementation(
	    'ItemAddOption', 'ModerateOption', 'ModerateOption',
	    'modules/moderate/ModerateOption.inc', 'moderate', null);
	if ($ret) {
	    return $ret->wrap(__FILE__, __LINE__);
	}

	return null;
    }

    /**
     * Event handler for GalleryEntity::delete events
     * Hide user root album if it becomes empty
     *
     * @see GalleryEventListener::handleEvent
     */
    function handleEvent($event) {
	$result = null;

	if ($event->getEventName() == 'GalleryEntity::delete') {
	    $thisEntity = $event->getEntity();

	    if ($thisEntity->getEntityType() != 'GalleryAlbumItem' && $thisEntity->getEntityType() != 'GalleryPhotoItem') {
		return array(null, $result);
	    }

	    //check if parent item is root album for user

	    list ($ret, $core) = GalleryCoreApi::fetchAllPluginParameters('module', 'core');
	    if ($ret) {
		return array($ret->wrap(__FILE__, __LINE__), null);
	    }
	    $rootId = $core['id.rootAlbum'];

	    list ($ret, $parentEntity) = GalleryCoreApi::loadEntitiesById($thisEntity->getParentId());
	    if ($ret) {
		return array($ret->wrap(__FILE__, __LINE__), null);
	    }
	    if ($parentEntity->getId() != $rootId) {
		list ($ret, $rootEntity) = GalleryCoreApi::loadEntitiesById($parentEntity->getParentId());
		if ($ret) {
		    return array($ret->wrap(__FILE__, __LINE__), null);
		}

		if ($rootEntity->getId() == $rootId) {
		    list ($ret, $child_count) = GalleryCoreApi::fetchChildCounts(array($parentEntity->getId()));
		    if ($ret) {
			return array($ret->wrap(__FILE__, __LINE__), null);
		    }
		    if ($child_count[$parentEntity->getId()] <= 1) {
			/*	$ret = GalleryCoreApi::deleteEntityById($parentEntity->getId());
				if ($ret) {
				    return array($ret->wrap(__FILE__, __LINE__), null);
				}
			 */

			$ret = GalleryCoreApi::removeGroupPermission($parentEntity->getId(), $core['id.everybodyGroup'], 'core.viewAll', false);
			if ($ret) {
			    return array($ret->wrap(__FILE__, __LINE__), null);
			}
		    }
		}
	    }
	}
	return array(null, $result);
    }
}
?>