/**
 * <copyright> Copyright (c) 2006 by Know-Center, Graz, Austria </copyright>
 * 
 * This software is the confidential and proprietary information of Know-Center,
 * Graz, Austria. You shall not disclose such Confidential Information and shall
 * use it only in accordance with the terms of the license agreement you entered
 * into with Know-Center.
 * 
 * KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 * 
 * $Id: SignPreview.java,v 1.2 2006/10/11 07:39:13 wprinz Exp $
 */
package at.knowcenter.wag.egov.egiz.web;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import at.knowcenter.wag.egov.egiz.exceptions.ErrorCodeException;
import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;

/**
 * @author wprinz
 */
public class SignPreview extends HttpServlet
{

  /**
   * SVUID.
   */
  private static final long serialVersionUID = -8818532511322299998L;

  protected void dispatch(HttpServletRequest request,
      HttpServletResponse response, String resource) throws ServletException, IOException
  {
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");

    RequestDispatcher disp = getServletContext().getRequestDispatcher(resource);
    disp.forward(request, response);
  }

  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    SessionInformation si = null;
    HttpSession session = null;
    try
    {
      session = request.getSession(false);
      // String session_id_string = request.getParameter("session");
      if (session == null)
      {
        throw new ErrorCodeException(600, "The session is missing.");
      }

      si = (SessionInformation) session.getAttribute(SessionAttributes.ATTRIBUTE_SESSION_INFORMATION);
      // long session_id = Long.parseLong(session_id_string);
      // si = SessionTable.get(session_id);
      if (si == null)
      {
        throw new ErrorCodeException(600, "The session is not found or is no longer valid.");
      }

    }
    catch (PresentableException e)
    {
      e.printStackTrace();
      Sign.prepareDispatchToErrorPage(e, request);
      dispatch(request, response, "/jsp/error.jsp");

      return;
    }

    try
    {
      String preview = request.getParameter(FormFields.FIELD_PREVIEW);
      if (preview != null && preview.equals(FormFields.VALUE_TRUE))
      {
        response.setContentType("application/pdf");
        response.getOutputStream().write(si.iui.signed_pdf);
        return;
      }
      else
      {
        Sign.finishSign(si, request, response, getServletContext());
      }
    }
    catch (PresentableException e)
    {
      e.printStackTrace();
      Sign.prepareDispatchToErrorPage(e, request);
      dispatch(request, response, "/jsp/error.jsp");
    }
  }
}