Liferay DXP JournalFolderTree with file download groovy

JournalFolderTree.groovy

import com.liferay.portal.kernel.util.PortalUtil;
import com.liferay.portal.kernel.service.ServiceContext;
import com.liferay.portlet.journal.service.*;
import com.liferay.journal.service.impl.*;
import com.liferay.journal.service.*;
import com.liferay.portal.kernel.service.*;
import com.liferay.portal.kernel.dao.orm.*;

final def SCRIPT_ID = "MYSCRIPT1"
outputFile = new File("""${System.getProperty("liferay.home")}/scripting/out-${SCRIPT_ID}.txt""")
outputFile.getParentFile().mkdirs()

def trace(message) {
  //out.println(message)
  outputFile << "${message}\n"
}


def getChildFolders(groupId, parentFolderId) { 
    def journalFolders = JournalFolderLocalServiceUtil.getFolders(groupId, parentFolderId);
    if(journalFolders.size() > 0){
    trace("<UL>");    
      for( x=0; x<journalFolders.size();x++){
        trace("<li>"+journalFolders[x].getName()+"</li>");
        getChildFolders(groupId, journalFolders[x].getFolderId());
      }
    trace("</UL>");
    }
}

try {
  trace("START");
  long companyId = PortalUtil.getDefaultCompanyId();
  long groupId = 20143; //HeyHema
  def group = GroupLocalServiceUtil.getGroup(companyId,"Guest");
  trace("groupId:"+group.getGroupId());    
  def groupFolders = JournalFolderLocalServiceUtil.getFolders(group.getGroupId());
  trace("<UL>");

  //for( i=0; i<groupFolders.size();i++){ 
  for( i=0; i<1;i++){ 
     trace("<li>"+groupFolders[i].getName()+"</li>");
     getChildFolders(groupId, groupFolders[i].getFolderId() ); 
  }

  trace("</UL>");    
  trace("END");
}catch (e) {
  out.println("Error = " + e.getMessage());
}