Untick Empty Cache Checkbox for Unpublished Resources in MODX Revolution Plugin

cacheguard.php

<?php
/**
 * cacheguard plugin for cacheguard extra
 *
 * Copyright 2013 by JP DeVries jp@modx.com
 * Created on 06-21-2013
 *
 * cacheguard 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.
 *
 * cacheguard 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
 * cacheguard; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * @package cacheguard
 */

/**
 * Description
 * -----------
 * Sets Clear Cache tickbox to false for unpublished Resources
 *
 * Variables
 * ---------
 * @var $modx modX
 * @var $scriptProperties array
 *
 * @package cacheguard
 **/

$eventName = $modx->event->name;
switch($eventName) {
    case 'OnDocFormRender':
    if($resource->get('published') != '1') {
        $selector = ($resource->get('class_key') == 'Article') ? 'modx-resource-clearcache' : 'modx-resource-syncsite';
  	$modx->regClientStartupHTMLBlock("<script>
			var cacheguard_protected = false;
			Ext.onReady(function(){
				if(!cacheguard_protected)Ext.getCmp('$selector').setValue(0);
				cacheguard_protected = true;
			});</script>
		");
	}   
	break;
    case 'OnDocFormSave':
    if($resource->get('published') != '1') {
        $resourceCache = $modx->getCacheManager()->getCacheProvider(
    		$modx->getOption('cache_resource_key', null, 'resource'),
    		array(
         		xPDO::OPT_CACHE_HANDLER => $modx->getOption('cache_resource_handler', null, $modx->getOption(xPDO::OPT_CACHE_HANDLER)),
         		xPDO::OPT_CACHE_EXPIRES => $modx->getOption('cache_resource_expires', null, $modx->getOption(xPDO::OPT_CACHE_EXPIRES)),
    		)
	);
	$resourceCache->delete("{$resource->context_key}/resources/{$resource->id}");
    }
	// Make sure auto_publish cache partition is updated if need be.
	if ($resource->get('pub_date') || $resource->get('unpub_date')) {
		$ctx = $resource->get('context_key');
		$providers = array(
			'auto_publish' => array('contexts' => $ctx),
		);
		$modx->cacheManager->refresh($providers);
	}
        break;
}