/*
 * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/admin/GeneralAdminTasksWebHandler.java,v 1.17 2004/06/05 04:58:43 minhnn Exp $
 * $Author: minhnn $
 * $Revision: 1.17 $
 * $Date: 2004/06/05 04:58:43 $
 *
 * ====================================================================
 *
 * Copyright (C) 2002-2004 by MyVietnam.net
 *
 * 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 any later version.
 *
 * All copyright notices regarding mvnForum MUST remain intact
 * in the scripts and in the outputted HTML.
 * The "powered by" text/logo with a link back to
 * http://www.mvnForum.com and http://www.MyVietnam.net in the
 * footer of the pages MUST remain visible when the pages
 * are viewed on the internet or intranet.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Support can be obtained from support forums at:
 * http://www.mvnForum.com/mvnforum/index
 *
 * Correspondence and Marketing Questions can be sent to:
 * info@MyVietnam.net
 *
 * @author: Minh Nguyen  minhnn@MyVietnam.net
 * @author: Mai  Nguyen  mai.nh@MyVietnam.net
 * @author: Igor Manic   imanic@users.sourceforge.net
 */
package com.mvnforum.admin;

import java.io.*;
import java.util.*;

import javax.mail.MessagingException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.mvnforum.MVNForumConfig;
import com.mvnforum.auth.*;
import com.mvnforum.common.SendMailUtil;
import com.mvnforum.db.DAOFactory;
import com.mvnforum.db.MemberBean;
import com.mvnforum.search.PostIndexer;
import freemarker.template.*;
import net.myvietnam.mvncore.exception.*;
import net.myvietnam.mvncore.util.*;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

class GeneralAdminTasksWebHandler {

    private static Log log = LogFactory.getLog(GeneralAdminTasksWebHandler.class);

    private OnlineUserManager onlineUserManager = OnlineUserManager.getInstance();

    GeneralAdminTasksWebHandler() {
    }

    void prepareShowIndex(HttpServletRequest request)
        throws DatabaseException, AssertionException, AuthenticationException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureIsAuthenticated();
    }

    void prepareTestSystem(HttpServletRequest request)
        throws DatabaseException, AssertionException, AuthenticationException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanAdminSystem();
    }

    void prepareImportExport(HttpServletRequest request)
        throws DatabaseException, AssertionException, AuthenticationException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanAdminSystem();

        request.setAttribute("BackupFilesOnServer", ImportWebHandler.getBackupFilesOnServer());
    }

    void importXmlZip(HttpServletRequest request, HttpServletResponse response)
        throws DatabaseException, AssertionException, AuthenticationException, ImportException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanAdminSystem();

        ImportWebHandler.importXmlZip(request, response);
    }

    void exportXmlZip(HttpServletRequest request)
        throws DatabaseException, AssertionException, AuthenticationException, ExportException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanAdminSystem();

        ExportWebHandler.exportXmlZip(request);
    }

    void getExportXmlZip(HttpServletRequest request, HttpServletResponse response)
        throws DatabaseException, AssertionException, AuthenticationException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanAdminSystem();

        ExportWebHandler.getExportXmlZip(request, response);
    }

    void deleteExportXmlZip(HttpServletRequest request)
        throws DatabaseException, AssertionException, AuthenticationException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanAdminSystem();

        ExportWebHandler.deleteExportXmlZip(request);
        //now prepare all for redirection to "/importexport"
        request.setAttribute("BackupFilesOnServer", ImportWebHandler.getBackupFilesOnServer());
    }

    void rebuildIndex(HttpServletRequest request)
        throws DatabaseException, AssertionException, AuthenticationException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanAdminSystem();

        PostIndexer.scheduleRebuildIndexTask();
    }

    void prepareSendMail(HttpServletRequest request)
        throws DatabaseException, AssertionException, AuthenticationException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanSendMail();
    }

    void sendMail(HttpServletRequest request)
        throws BadInputException, MessagingException, DatabaseException,
        AuthenticationException, AssertionException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanSendMail();

        String from = ParamUtil.getParameterEmail(request, "From");
        String to = ParamUtil.getParameter(request, "To");
        String cc = ParamUtil.getParameter(request, "Cc");
        String bcc = ParamUtil.getParameter(request, "Bcc");
        String subject = ParamUtil.getParameter(request, "Subject", true);
        String message = ParamUtil.getParameter(request, "Message", true);

        int mailToSelector = ParamUtil.getParameterInt(request, "MailToSelector");

        Collection mailMessageStructs = new ArrayList();
        if (mailToSelector == 0) {// that is, send to specific users
            if ((to.length() == 0) && (cc.length() == 0) && (bcc.length() == 0)) {
                throw new BadInputException("Please enter at least To, CC or BCC.");
            }
            MailMessageStruct mailMessageStruct = new MailMessageStruct();
            mailMessageStruct.setFrom(from);
            mailMessageStruct.setTo(to);
            mailMessageStruct.setCc(cc);
            mailMessageStruct.setBcc(bcc);
            mailMessageStruct.setSubject(subject);
            mailMessageStruct.setMessage(message);
            mailMessageStructs.add(mailMessageStruct);
        } else {// send to group of users

            // now add emails in the To, CC, BCC
            String[] emailArray = MailUtil.getEmails(to, cc, bcc);
            for (int i = 0; i < emailArray.length; i++) {
                MailMessageStruct mailMessage = new MailMessageStruct();
                mailMessage.setFrom(from);
                mailMessage.setTo(emailArray[i]);
                mailMessage.setSubject(subject);
                mailMessage.setMessage(message);
                mailMessageStructs.add(mailMessage);
            }

            // Then add members coresponding to the mailToSelector
            String kind;
            switch (mailToSelector) {
                case 1:
                    kind = "all";
                    break;
                case 2:
                    kind = "activated";
                    break;
                case 3:
                    kind = "nonactivated";
                    break;
                default:
                    throw new BadInputException("Cannot process MailToSelector = " + mailToSelector);
            }
            Collection memberBeans = DAOFactory.getMemberDAO().getMembers_inActivationStatus(kind);
            for (Iterator countIterator = memberBeans.iterator(); countIterator.hasNext(); ) {
                MemberBean memberBean = (MemberBean) countIterator.next();
                MailMessageStruct mailMessage = new MailMessageStruct();
                mailMessage.setFrom(from);
                mailMessage.setTo(memberBean.getMemberEmail());
                mailMessage.setSubject(processMailTemplate(memberBean, subject));
                mailMessage.setMessage(processMailTemplate(memberBean, message));
                mailMessageStructs.add(mailMessage);
            }//for
        }

        // finally, send the collection of emails
        try {
            MailUtil.sendMail(mailMessageStructs);
        } catch (UnsupportedEncodingException e) {
            log.error("Cannot support encoding", e);
        }

        request.setAttribute("MailMessageStructs", mailMessageStructs);
    }

    void sendActivateMailToAll(HttpServletRequest request)
        throws BadInputException, MessagingException, DatabaseException,
        AuthenticationException, AssertionException, ObjectNotFoundException, IOException, TemplateException {

        OnlineUser onlineUser = onlineUserManager.getOnlineUser(request);
        MVNForumPermission permission = onlineUser.getPermission();
        permission.ensureCanSendMail();//@todo: check if this is the correct permission

        //@todo: review this constant parameter "nonactivated"
        Collection memberBeans = DAOFactory.getMemberDAO().getMembers_inActivationStatus("nonactivated");
        Collection mailMessageStructs = new ArrayList();
        String serverName = ParamUtil.getServer2(request);
        for (Iterator countIterator = memberBeans.iterator(); countIterator.hasNext(); ) {
            MemberBean memberBean = (MemberBean) countIterator.next();
            MailMessageStruct mailMessage = SendMailUtil.getActivationCodeEmail(memberBean.getMemberID(), serverName);
            mailMessageStructs.add(mailMessage);
        }//for

        try {
            log.debug("About to send activate mail to all non activated members, total = " + mailMessageStructs.size());
            MailUtil.sendMail(mailMessageStructs);
        } catch (UnsupportedEncodingException e) {
            log.error("Cannot support encoding", e);
        }

        request.setAttribute("MailMessageStructs", mailMessageStructs);
    }

    /**
     *Process mail with a template from User
     */
    private String processMailTemplate(MemberBean memberBean, String message) {
        try {
            Map root = new HashMap();
            StringWriter messageWriter = new StringWriter(256);

            //Just assume some variables are needed to be replaced
            root.put("memberID", new Integer(memberBean.getMemberID()));
            root.put("memberName", memberBean.getMemberName());
            root.put("memberFirstname", memberBean.getMemberFirstname());
            root.put("memberLastname", memberBean.getMemberLastname());
            root.put("memberEmail", memberBean.getMemberEmail());

            StringReader stringReader = new StringReader(message);
            Configuration cfg = MVNForumConfig.getFreeMarkerConfiguration();
            Template messageTemplate = new Template("", stringReader, cfg, "");
            messageTemplate.process(root, messageWriter);
            message = messageWriter.toString();
        } catch (IOException ioe) {
            log.error("Cannot process mail template", ioe);
            //if we have problem while processing template, we will return orginal message
        } catch (TemplateException te) {
            log.error("Cannot process mail template", te);
            //if we have problem while processing template, we will return orginal message
        }
        //log.debug("processMailTemplate return = " + message);
        return message;
    }
}