/**
    * Atlassian Source Code Template.
    * User: Bobby
    * Date: Apr 8, 2003
    * Time: 9:07:18 AM
    * CVS Revision: $Revision: 1.5 $
    * Last CVS Commit: $Date: 2006/10/09 01:01:38 $
    * Author of last CVS Commit: $Author: bkuo $
    */
  
  package com.atlassian.johnson.filters;
  
  import com.atlassian.johnson.JohnsonEventContainer;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.net.URLEncoder;
  
  /**
   * A filter that handles cases where the application is unable to handle a normal request and redirects to the
   * configured error path so that a nice error page can be provided.
   */
  public class JohnsonFilter extends AbstractJohnsonFilter {
  
      private static final Logger LOG = LoggerFactory.getLogger(JohnsonFilter.class);
  
      protected void handleError(JohnsonEventContainer appEventContainer, HttpServletRequest servletRequest, HttpServletResponse servletResponse) throws IOException {
          String servletPath = getServletPath(servletRequest);
          String contextPath = servletRequest.getContextPath();
          LOG.info("The application is still starting up, or there are errors. Redirecting request from '{}' to '{}'",
                  servletPath, config.getErrorPath());
  
          String nextUrl = servletRequest.getRequestURI();
  
          if (servletRequest.getQueryString() != null && !servletRequest.getQueryString().isEmpty()) {
              nextUrl += "?" + servletRequest.getQueryString();
          }
  
          String redirectUrl = contextPath + config.getErrorPath()
                  + "?next=" + URLEncoder.encode(nextUrl, "UTF-8");
  
          servletResponse.sendRedirect(redirectUrl);
      }
  
      protected void handleNotSetup(HttpServletRequest servletRequest, HttpServletResponse servletResponse) throws IOException {
          String servletPath = getServletPath(servletRequest);
          String contextPath = servletRequest.getContextPath();
          LOG.info("The application is not yet setup. Redirecting request from '{}' to '{}'",
                  servletPath, config.getSetupPath());
          servletResponse.sendRedirect(contextPath + config.getSetupPath());
      }
  }