/******************************************************************************

  * MosaicDisplayAjaxController.java - The Spring controller for the Mosaic Display page AJAX calls

  * 

  * PicMan - The BuckoSoft Picture Manager in Java

  * Copyright(c) 2007 - Dick Balaska

  * 

  */

 package com.buckosoft.PicMan.web;

 import java.io.IOException;

 import java.io.OutputStream;

 import java.io.UnsupportedEncodingException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import org.dom4j.Document;

 import org.dom4j.io.OutputFormat;

 import org.dom4j.io.XMLWriter;

 import org.springframework.web.servlet.ModelAndView;

 import org.springframework.web.servlet.mvc.Controller;

 import com.buckosoft.BSAccount.web.BSAccountPageController;

 import com.buckosoft.BSAccount.web.BSAccountUserWebSession;

 import com.buckosoft.PicMan.business.PicManFacade;

 import com.buckosoft.PicMan.dom.MosaicManDom;

 import com.buckosoft.PicMan.domain.User;

 /** The Spring controller for the Mosaic Display page AJAX calls

  * @author Dick Balaska

  * @since 2007/12/28

  * @see <a href="http://cvs.buckosoft.com/Projects/java/PicMan/PicMan/src/com/buckosoft/PicMan/web/MosaicDisplayAjaxController.java">MosaicDisplayAjaxController.java</a>

  */

 public class MosaicDisplayAjaxController extends BSAccountPageController implements        Controller {

         private final static boolean DEBUG                = false;

         private final static boolean DEBUGLOTS        = false;

         protected final Log logger = LogFactory.getLog(getClass());

         private PicManFacade pmf;

         /** Set the reference to the PicMan API.

          * @param pmf The PicManFacade

          */

         public void setPicMan(PicManFacade pmf) { this.pmf = pmf; }

         /** Spring standard http request handler, outputs a {@link MosaicManDom}

          * @param request The http request

          * @param response The http response

          * @return null

          */ 

         public ModelAndView handleRequest(HttpServletRequest request,

                         HttpServletResponse response) {

                 if (DEBUGLOTS)

                         logger.info("XML MosaicDisplay Request");

                 response.setContentType("text/xml");

                 response.addHeader("Cache-Control", "max-age=0");

                 response.addHeader("Cache-Control", "no-cache");

                 response.addHeader("expires", "0");

                 response.addHeader("Expires", "Tue, 01 Jan 1980 1:00:00 GMT");

                 response.addHeader("Pragma", "no-cache");

                 User user = null;

                 BSAccountUserWebSession userWebSession = this.bsAccountMan.getUserWebSession(request);

                 if (userWebSession != null) 

                         user = (User)userWebSession.getUser();

                 String outputMosaic = request.getParameter("outputMosaic");

                 if (outputMosaic != null) {

                         if (DEBUG)

                                 logger.info("OutputMosaic");

                         pmf.getMosaicMan().outputMosaicFile();

                 }

                 try {

                         Document dom = MosaicManDom.createDocument(pmf, user);

                         OutputStream stream = response.getOutputStream();

                         OutputFormat outformat = OutputFormat.createPrettyPrint();

                         outformat.setEncoding("ISO-8859-1");

                         XMLWriter writer = new XMLWriter(stream, outformat);

                         writer.write(dom);

                         writer.flush();

                 } catch (UnsupportedEncodingException e) {

                         logger.warn(e);

                 } catch (IOException e) {

                         logger.warn(e);

                 }

                 return null;

         }

 }