managepages.java

java 写的一个新闻发布系统

// $Id: ManagePages.java,v 1.4 2002/06/07 13:50:30 pmartin Exp $
//
//                                   ____.
//                       __/\ ______|    |__/\.     _______
//            __   .____|    |       \   |    +----+       \
//    _______|  /--|    |    |    -   \  _    |    :    -   \_________
//   \\______: :---|    :    :           |    :    |         \________>
//           |__\---\_____________:______:    :____|____:_____\
//                                      /_____|
//
//              . . . i n   j a h i a   w e   t r u s t . . .
//
//
//  ManagePages
//
//  01.04.2001  AK  added in jahia.
//  23.05.2001  NK  Lot of change mainly to display the page's template when the user choose another page in the page selectbox.
//  13.16.2001  MJ  Avoid crash when pointing to a page referencing a deleted template.
//

package org.jahia.admin.pages;

import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

import org.jahia.bin.*;
import org.jahia.utils.*;
import org.jahia.registries.*;
import org.jahia.services.pages.*;
import org.jahia.exceptions.*;
import org.jahia.services.sites.*;
import org.jahia.params.*;



/**
 * desc:  This class is used by the administration to manage
 * pages settings. For each page on the site, you can choose wich template
 * you want. It's a very good tool when you use the template swapping and
 * the template doesn't work correctly.
 *
 * Copyright:    Copyright (c) 2002
 * Company:      Jahia Ltd
 *
 * @author Alexandre Kraft
 * @version 1.0
 */
public class ManagePages
{
    private static final String     CLASS_NAME        =  JahiaAdministration.CLASS_NAME;
    private static final String     JSP_PATH          =  JahiaAdministration.JSP_PATH;
    private              JahiaSite  site;



    /**
     * Default constructor.
     * @author  Alexandre Kraft
     *
     * @param   request       Servlet request.
     * @param   response      Servlet response.
     * @param   session       Servlet session for the current user.
     */
    public ManagePages( HttpServletRequest       request,
                        HttpServletResponse      response,
                        HttpSession              session )
    throws Throwable
    {
        // get the current website. get the jahiaserver if it's null...
        site =  (JahiaSite) session.getAttribute( ParamBean.SESSION_SITE );
        if(site==null) {
            JahiaSitesService sitesService = ServicesRegistry.getInstance().getJahiaSitesService();
            site = sitesService.getSite( 0 );
            session.setAttribute( ParamBean.SESSION_SITE, site );
        }

        userRequestDispatcher( request, response, session );
    } // end constructor



    /**
     * This method is used like a dispatcher for user requests.
     * @author  Alexandre Kraft
     *
     * @param   request       Servlet request.
     * @param   response      Servlet response.
     * @param   session       Servlet session for the current user.
     */
    private void userRequestDispatcher( HttpServletRequest    request,
                                        HttpServletResponse   response,
                                        HttpSession           session )
    throws Throwable
    {
        String operation =  request.getParameter("sub");

        if(operation.equals("display")) {
            displayPagesSettings( request, response, session );
        } else if(operation.equals("process")) {
            processPagesSettings( request, response, session );
        }
    } // userRequestDispatcher



    /**
     * Display the pages settings view, using doRedirect(). It's on this
     * page where you can change the template for each page on your Jahia
     * portal.
     * @author  Alexandre Kraft
     * @author  Khue Nguyen
     *
     * @param   request       Servlet request.
     * @param   response      Servlet response.
     * @param   session       Servlet session for the current user.
     */
    private void displayPagesSettings( HttpServletRequest    request,
                                       HttpServletResponse   response,
                                       HttpSession           session )
    throws IOException, ServletException
    {
        try {

            // get all pages id...
            JahiaPageBaseService pageService       = JahiaPageBaseService.getInstance();
            Vector allPagesIDVector = pageService.getPageIDsInSite(site.getID(),
                org.jahia.services.pages.PageInfoInterface.TYPE_DIRECT);

            // get all pages infos...
            Vector      allPagesInfosVector    = new Vector();
            Enumeration allPagesIDEnumeration  = allPagesIDVector.elements();
            while(allPagesIDEnumeration.hasMoreElements()) {
                Integer pageID = (Integer) allPagesIDEnumeration.nextElement();
                try {
                    allPagesInfosVector.add ((JahiaPage)pageService.lookupPageWhitoutTemplates (pageID.intValue()));
                } catch (JahiaTemplateNotFoundException jtnfe) {
                }
            }

            // get homepage id for the current site...
            Integer homePageID = new Integer( site.getHomePageID() );

            // retrieve previous form values...
            Integer basePageID           = (Integer) request.getAttribute(CLASS_NAME + "basePageID");
            Integer baseTemplateID       = (Integer) request.getAttribute(CLASS_NAME + "baseTemplateID");

            // get only visible templates
            Enumeration allTemplatesEnumeration =  ServicesRegistry.getInstance().getJahiaPageTemplateService().getPageTemplates (site.getID(), true);

            // set default values...
            if(basePageID == null)     {  basePageID     =  new Integer(0);  }
            if(baseTemplateID == null) {  baseTemplateID =  new Integer(0);  }
            if(homePageID == null)     {  homePageID     =  new Integer(0);  }

            // set all pages infos into an enumeration and redirect...
            request.setAttribute("homePageID",                homePageID);
            request.setAttribute("basePageID",                basePageID);
            request.setAttribute("baseTemplateID",            baseTemplateID);
            request.setAttribute("allTemplatesEnumeration",   allTemplatesEnumeration);
            request.setAttribute("allPagesInfosEnumeration",  allPagesInfosVector.elements());

            JahiaAdministration.doRedirect( request, response, session, JSP_PATH + "pages_settings.jsp" );

            // reset message...
            session.setAttribute(CLASS_NAME + "jahiaDisplayMessage",  Jahia.COPYRIGHT);
        } catch (JahiaException je) {
        }
    } // end displayPagesSettings



    /**
     * Process and determine which template the user want for wich
     * page. It's a simple process, but check if the user has choosed
     * a page and a template in select boxs.
     * @author  Alexandre Kraft
     * @author  Khue Nguyen
     *
     * @param   request       Servlet request.
     * @param   response      Servlet response.
     * @param   session       Servlet session for the current user.
     */
    protected void processPagesSettings( HttpServletRequest   request,
                                         HttpServletResponse  response,
                                         HttpSession          session )
    throws IOException, ServletException
    {
        int     idPage       =  0;
        int     idTemplate   =  0;
        JahiaPage page = null;

        try {

            JahiaPageService pageServ = ServicesRegistry.getInstance()
                                                        .getJahiaPageService();

            if ( pageServ == null ){

                throw new JahiaException(	"Unavailable Services",
                                            "Unavailable Services",
                                            JahiaException.SERVICE_ERROR,
                                            JahiaException.ERROR );
            }


            String subAction			= (String)request.getParameter("subaction");

            // get form values...
            String  idPageString      	= (String)request.getParameter("pageid").trim();

            try {
                idPage      	= Integer.parseInt(idPageString);
                if ( idPage != 0 ){
                    page 			= pageServ.lookupPage(idPage);
                    if ( page != null ){

                        JahiaPageDefinition pageDef = page.getPageTemplate();
                        if ( pageDef != null ){
                            idTemplate = pageDef.getID();
                        }
                    }
                }
            } catch (NumberFormatException nfe) {

                throw new JahiaException(	"ManagePages",
                                            "page not found",
                                            JahiaException.DATA_ERROR,
                                            JahiaException.ERROR );
            // Mik - 13.06.2001
            } catch (JahiaTemplateNotFoundException jtnfe) {
                // idTemplate remains 0 ... the template referenced by this page has been deleted
                // so we want to set a new template.
            }



            if ( subAction.equals("save") ) {

                // check form validity...
                if(idPageString.equals("0")) {
                    session.setAttribute(CLASS_NAME + "jahiaDisplayMessage",  "Please choose a page in the upper box.");
                    idTemplate = 0;
                } else if ( page!=null ) {
                    String  idTemplateString  = (String) request.getParameter("templateid").trim();

                    try {
                        idTemplate  = Integer.parseInt(idTemplateString);

                        if ( idTemplate != 0 ){
                            // set new settings for this JahiaPage...
                            page.setPageTemplateID (idTemplate);
                            page.commitChanges (true);
                            session.setAttribute(CLASS_NAME + "jahiaDisplayMessage",  "Change successfully updated.");
                        } else {
                            session.setAttribute(CLASS_NAME + "jahiaDisplayMessage",  "Please choose a template first.");
                        }
                    } catch (NumberFormatException nfe) {

                        throw new JahiaException(	"ManagePages",
                                                    nfe.getMessage(),
                                                    JahiaException.DATA_ERROR,
                                                    JahiaException.ERROR );

                    }
                } else {

                        throw new JahiaException(	"ManagePages",
                                                    "Page not found [" + idPage +"]",
                                                    JahiaException.DATA_ERROR,
                                                    JahiaException.ERROR );
                }
            }

            request.setAttribute(CLASS_NAME + "basePageID",      new Integer(idPage));
            request.setAttribute(CLASS_NAME + "baseTemplateID",  new Integer(idTemplate));
            displayPagesSettings( request, response, session );

        } catch ( JahiaException je ){
            request.setAttribute("jahiaDisplayMessage",
                                    "An error occured while processing your request");
            JahiaAdministration.doRedirect( request,
                                            response,
                                            session,
                                            JSP_PATH + "menu.jsp" );
        }


    } // end processPagesSettings


} // end ManagePages