managehomepages.java

java 写的一个新闻发布系统

// $Id: ManageHomepages.java,v 1.6 2002/06/07 13:50:30 pmartin Exp $
//
//                                   ____.
//                       __/\ ______|    |__/\.     _______
//            __   .____|    |       \   |    +----+       \
//    _______|  /--|    |    |    -   \  _    |    :    -   \_________
//   \\______: :---|    :    :           |    :    |         \________>
//           |__\---\_____________:______:    :____|____:_____\
//                                      /_____|
//
//              . . . i n   j a h i a   w e   t r u s t . . .
//
//
//  ManageHomepages
//
//  18.12.2001  NK  added in jahia.
//

package org.jahia.admin.homepages;

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

import org.jahia.bin.*;
import org.jahia.params.*;
import org.jahia.utils.*;
import org.jahia.data.*;
import org.jahia.services.usermanager.*;   		// Usermanager services
import org.jahia.services.sites.*;         		// Site services
import org.jahia.services.pages.*;         		// Pages services
import org.jahia.services.homepages.*;     		// Homepages services
import org.jahia.registries.*;             		// ServicesRegistry
import org.jahia.exceptions.*;             		// JahiaException
import org.jahia.engines.copytree.CopyTree_Engine;




/**
 * This class is used by the administration to manage homepages definitions.
 *
 * Copyright:    Copyright (c) 2002
 * Company:      Jahia Ltd
 *
 * @author Khue Nguyen
 * @version 1.0
 */
public class ManageHomepages
{


    private static final String CLASS_NAME  = ManageHomepages.class.getName();
    private static final String JSP_PATH    = JahiaAdministration.JSP_PATH;
    private static final String HTTP_FILES  = "/jsp/jahia/engines";
    private static final String JSP         = "/jsp/jahia/administration/homepages/main.jsp?includejsp=";

    private static ServletContext context;

    private ServicesRegistry sReg;
    private JahiaSitesService siteServ;
    private JahiaHomepagesService hpServ;

    private JahiaSite site;
    private JahiaUser user;
    private Hashtable values = new Hashtable();

    private String operation = ""; // current operation

    public static final String CHOOSEPAGE_LAUNCHER_LINK_SOURCEPAGE
                        = "org.jahia.admin.ManageHomepages.link_sourcepage";
    public static final String CHOOSEPAGE_LAUNCHER_NEW_DESTPAGE
                        = "org.jahia.admin.ManageHomepages.new_destpage";
    public static final String CHOOSEPAGE_LAUNCHER_COPY_DESTPAGE
                        = "org.jahia.admin.ManageHomepages.copy_destpage";
    public static final String CHOOSEPAGE_LAUNCHER_COPY_SOURCEPAGE
                        = "org.jahia.admin.ManageHomepages.copy_sourcepage";

    //--------------------------------------------------------------------------
    /**
     * Default constructor.
     * @author  Khue Nguyen
     *
     * @param   request       Servlet request.
     * @param   response      Servlet response.
     * @param   session       Servlet session for the current user.
     * @param   context       Servlet context.
     */
    public ManageHomepages( 	HttpServletRequest    request,
                                HttpServletResponse   response,
                                HttpSession           session,
                                ServletContext        context )
    throws Throwable
    {
        this.context =  context;

        sReg  =  ServicesRegistry.getInstance();

        if (sReg == null) {
            displayError(request,response,"Service Registry is not available");
            return;
        }

        siteServ =  sReg.getJahiaSitesService();
        hpServ =  sReg.getJahiaHomepagesService();

        if ( siteServ == null || hpServ == null ){
            displayError(request,response,"Requested Services are not available");
            return;
        }


        userRequestDispatcher( request, response, session );
    }


    //--------------------------------------------------------------------------
    /**
     * This method is used like a dispatcher for user requests.
     * @author  Khue Nguyen
     *
     * @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 IOException,ServletException {

        // check if the user has really admin access to this site...
        user =  (JahiaUser) session.getAttribute( ParamBean.SESSION_USER );
        site =  (JahiaSite) session.getAttribute( ParamBean.SESSION_SITE );

        if ( site == null || user == null || sReg == null ){
            displayError(request,response,"Requested information not available.");
            return;
        }

        try {

            if ( JahiaSiteTools.getAdminGroup(site).isMember(user) ){

                operation =  request.getParameter("sub");

                if(operation.equals("display")) {
                    displayMain( request, response, session );
                } else if(operation.equals("add")) {
                    displayAdd( request, response, session );
                } else if(operation.equals("detail")) {
                    displayDetail( request, response, session );
                } else if(operation.equals("options")) {
                    displayOptions( request, response, session );
                }

            } else {
                //System.out.println(" --> no admin access on this site <--");
                displayError(request,response,"No admin access on this site");
            }

        } catch ( Throwable t ){
            t.printStackTrace();
            displayError(request,response,"An error occured while processing your request");
        }
    }

    /**
     * Forward the servlet request and servlet response objects, using the request
     * dispatcher (from the ServletContext). Note: please be careful, use only
     * context relative path.
     *
     * @param       request             servlet request.
     * @param       response            servlet response.
     * @param       target              target, context-relative path.
     * @exception   IOException         an I/O exception occured during the process.
     * @exception   ServletException    a servlet exception occured during the process.
     */
    private void doRedirect( HttpServletRequest   request,
                             HttpServletResponse  response,
                             String               target )
    throws IOException, ServletException
    {
        try
        {
            request.setAttribute("currentSite",site);
            request.setAttribute("user",user);

            // check current operation
            if( request.getAttribute("operation") == null ) {
                request.setAttribute("operation", operation);
            }

            // check null warning msg
            if( request.getAttribute("warningMsg") == null ) {
                request.setAttribute("warningMsg", "");
            }

            // check null jsp bottom message, and fill in if necessary...
            if( request.getAttribute("msg") == null ) {
                request.setAttribute("msg", Jahia.COPYRIGHT);
            }

            if( request.getAttribute("focus") == null ) {
                request.setAttribute("focus", "-none-");
            }

            // check null configuration step title, and fill in if necessary...
            if( request.getAttribute("title") == null ) {
                request.setAttribute("title", "Manage Home pages");
            }

            // set input values on request...
            request.setAttribute( "values", values );

            // add http files path in request...
            request.setAttribute( "url", request.getContextPath() + HTTP_FILES );

            // get browser entity...
            String userAgent = request.getHeader("user-agent");

            Integer navigator = (userAgent.indexOf("IE"))
                                        != -1 ? new Integer(0) : new Integer(1);
            request.setAttribute("navigator", navigator);

            boolean isLynx = false;

            if(userAgent.indexOf("Lynx") != -1) {
                isLynx    = true;
            }
            request.setAttribute("isLynx", new Boolean(isLynx));

            // redirect!
            context.getRequestDispatcher( target ).forward( request, response );

        } catch (IOException ie) {
            JahiaConsole.println(CLASS_NAME+".doRedirect() :" , "error " + ie.getMessage());
        } catch (ServletException se) {
            JahiaConsole.println(CLASS_NAME+".doRedirect() :",  "error " + se.getMessage());
        }
    }

    //--------------------------------------------------------------------------
    /**
     * Display the main admin page for homepage definitions.
     *
     * @author  Khue Nguyen
     *
     * @param   request       Servlet request.
     * @param   response      Servlet response.
     * @param   session       Servlet session for the current user.
     */
    private void displayMain(	HttpServletRequest    request,
                                HttpServletResponse   response,
                                HttpSession           session )
    throws IOException, ServletException, JahiaException
    {
        // reset session
        session.setAttribute("homepageBean", null);

        Enumeration enum = hpServ.getHomepages(site);

        request.setAttribute("homepages",enum);

        // set the default action
        request.setAttribute("subAction","list");
        // set the default step
        request.setAttribute("go","change");

        doRedirect( request, response, JSP + "list" );
    }

    //--------------------------------------------------------------------------
    /**
     * Forward to error page.
     *
     * @author  Khue Nguyen
     *
     * @param   request       Servlet request.
     * @param   response      Servlet response.
     * @param   String        the warning msg.
     */
    private void displayError(	HttpServletRequest    request,
                                HttpServletResponse   response,
                                String msg )
    throws IOException, ServletException
    {
        request.setAttribute("warningMsg",msg);
        doRedirect( request, response, JSP + "error" );
    }


    /***************************************************************************
     * ADD SECTION
     *
     */

    //--------------------------------------------------------------------------
    /**
     * Display the add new homepage form.
     *
     * @author  Khue Nguyen
     *
     * @param   request       Servlet request.
     * @param   response      Servlet response.
     * @param   session       Servlet session for the current user.
     */
    private void displayAdd(	HttpServletRequest    request,
                                HttpServletResponse   response,
                                HttpSession           session )
    throws IOException, ServletException, JahiaException
    {
        JahiaConsole.println(CLASS_NAME+".displayAdd","Started");

        JahiaHomepage hp = null;

        String go = request.getParameter("go");
        if ( go == null ){
            go = "";
            //reset session
            session.setAttribute("homepageBean",null);
        }

        // set the default action
        request.setAttribute("subAction","add");
        // set the default step
        if ( go.equals("") )
            go = "change";
        request.setAttribute("go",go);

        hp = (JahiaHomepage)session.getAttribute("homepageBean");
        if ( hp == null ){
            hp = hpServ.createHomepage(	"",
                                        "",
                                        site.getSiteKey(),
                                        HomepageTypes.HOMEPAGE_LINK,
                                        new Hashtable(),
                                        0 );
            session.setAttribute("homepageBean",hp);

        } else {

            // default values
            String name = "";
            int type = HomepageTypes.HOMEPAGE_LINK;
            String descr = "";


            // retrieve submitted Data
            String value = request.getParameter("name");
            if ( value != null )
                name = value;

            value = request.getParameter("type");
            if ( value != null )
                type = Integer.parseInt(value);

            value = request.getParameter("descr");
            if ( value != null )
                descr = value;

            if ( hp.getType() != type ){
                // type has changed ! Recreate a new Bean with correct type
                hp = hpServ.createHomepage(	name,
                                            descr,
                                            site.getSiteKey(),
                                            type,
                                            new Hashtable(),
                                            0 );