/**
    * This file Copyright (c) 2003-2014 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.admininterface;
  
  import info.magnolia.cms.servlets.MVCServlet;
  import info.magnolia.cms.servlets.MVCServletHandler;
  import info.magnolia.cms.util.RequestFormUtil;
  
  import javax.servlet.ServletConfig;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import info.magnolia.context.MgnlContext;
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * @author Philipp Bracher
   * @version $Id$
   */
  public class PageMVCServlet extends MVCServlet {
  
      /**
       * Stable serialVersionUID.
       */
      private static final long serialVersionUID = 222L;
  
      /**
       * Logger.
       */
      private static Logger log = LoggerFactory.getLogger(PageMVCServlet.class);
  
      private static final String HANDLE_PREFIX_PARAMETER = "handlePrefix";
  
      private static final String DEFAULT_HANDLE_PREFIX = ".magnolia/pages/";
  
      private String handlePrefix;
  
      @Override
      public void init(ServletConfig config) throws ServletException {
          super.init(config);
          String handlePrefix = this.getInitParameter(HANDLE_PREFIX_PARAMETER);
          this.handlePrefix = StringUtils.isEmpty(handlePrefix) ? DEFAULT_HANDLE_PREFIX : handlePrefix;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected MVCServletHandler getHandler(HttpServletRequest request, HttpServletResponse response) {
  
          String pageName = MgnlContext.getAggregationState().getCurrentURI();
          pageName = StringUtils.substringAfter(pageName, handlePrefix);
          // strip any extension
          pageName = StringUtils.substringBeforeLast(pageName, ".");
  
          PageMVCHandler handler = null;
  
          if (StringUtils.isNotEmpty(pageName)) {
              // try to get a registered handler
              try {
                  handler = PageHandlerManager.getInstance().getPageHandler(pageName, request, response);
              }
              catch (InvalidDialogPageHandlerException e) {
                  log.error("Could not instantiate page handler with name " + pageName, e);
             }
         }
         else {
             log.warn("No dialog page name passed for url {}", request.getRequestURI());
         }
 
         return handler;
     }
 
 }