/*
    * Copyright (C) 2003-2007 eXo Platform SAS.
    *
    * This program is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Affero General Public License
    * as published by the Free Software Foundation; either version 3
    * of the License, or (at your option) any later version.
    *
    * 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, see<http://www.gnu.org/licenses/>.
   */
  package org.exoplatform.ecm.jcr;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.List;
  
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.Session;
  import javax.servlet.RequestDispatcher;
  import javax.servlet.ServletConfig;
  import javax.servlet.ServletException;
  import javax.servlet.ServletOutputStream;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.exoplatform.services.log.Log;
  import org.exoplatform.container.PortalContainer;
  import org.exoplatform.container.RootContainer;
  import org.exoplatform.services.cms.templates.TemplateService;
  import org.exoplatform.services.jcr.RepositoryService;
  import org.exoplatform.services.log.ExoLogger;
  
  @SuppressWarnings({"serial","unused"})
  public class RssServlet extends HttpServlet {
    private static final Log LOG  = ExoLogger.getLogger(RssServlet.class.getName());
    public void init(ServletConfig config) throws ServletException {}
    public void service(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
      response.setHeader("Cache-Control", "private max-age=600, s-maxage=120");
      String wsName = null ;
      String path = null ;
      String portalName = null ;
      String pathInfo = request.getPathInfo() ;
      portalName = pathInfo.substring(1, pathInfo.indexOf("/", 1)) ;
      wsName = pathInfo.substring(portalName.length() + 2, pathInfo.indexOf("/", portalName.length() + 2)) ;
      path = pathInfo.substring(pathInfo.indexOf(wsName)+ wsName.length() + 1);
      PortalContainer pcontainer =  RootContainer.getInstance().getPortalContainer(portalName);
      PortalContainer.setInstance(pcontainer) ;
      RepositoryService repositoryService =
        (RepositoryService)pcontainer.getComponentInstanceOfType(RepositoryService.class);
      TemplateService tservice =
        (TemplateService)pcontainer.getComponentInstanceOfType(TemplateService.class);
      Session session = null ;
      try{
        session = repositoryService.getCurrentRepository().getSystemSession(wsName) ;
        String repositoryName = repositoryService.getCurrentRepository().getConfiguration().getName();
        Node rootNode = session.getRootNode() ;
        Node file = null ;
        if(rootNode.hasNode(path))
          file = rootNode.getNode(path) ;
        else if(rootNode.hasNode(path.substring(0, path.lastIndexOf("/")))){
          Node parentNode = rootNode.getNode(path.substring(0, path.lastIndexOf("/"))) ;
          String name = path.substring(path.lastIndexOf("/") + 1) ;
            if(name.indexOf(".") > -1 && parentNode.hasNode(name.substring(0, name.indexOf("."))))
              file = parentNode.getNode(name.substring(0, name.indexOf("."))) ;
        }
        if (file == null) throw new Exception("Node " + path + " not found. ");
        Node content;
        if(file.isNodeType("nt:file")) {
          content = file.getNode("jcr:content");
          Property data = content.getProperty("jcr:data");
          String mimeType = content.getProperty("jcr:mimeType").getString();
          response.setContentType(mimeType) ;
          InputStream is = data.getStream();
          byte[] buf = new byte[is.available()];
          is.read(buf);
          ServletOutputStream os = response.getOutputStream();
          os.write(buf);
        } else if (file.isNodeType("exo:rss-enable")){
          List documentNodeType = tservice.getDocumentTemplates() ;
          String nodeType = file.getPrimaryNodeType().getName() ;
          if(documentNodeType.contains(nodeType)){
            String templateName = tservice.getTemplatePath(false, nodeType, "view1") ;
            request.setAttribute("portalName", portalName) ;
            request.setAttribute("wsName", wsName) ;
            request.setAttribute("templateName", "jcr:"+templateName) ;
            request.setAttribute("curNode", file) ;
            RequestDispatcher rd = request.getRequestDispatcher("/viewcontent");
            rd.forward(request, response);
          }else {
            throw new Exception("This node type is not document node");
         }
       } else throw new Exception("Invalid node type, expected nt:file or exo:rss-enable type");
     }catch(Exception e) {
       if (LOG.isErrorEnabled()) {
         LOG.error("Unexpected error", e);
       }
       throw new ServletException(e) ;
     }finally{
       if(session != null) {
         session.logout() ;
       }
     }
   }
 }