/**
    * This file Copyright (c) 2003-2011 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.delta;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.ItemType;
  import info.magnolia.cms.core.Path;
  import info.magnolia.cms.util.NodeDataUtil;
  import info.magnolia.module.InstallContext;
  import info.magnolia.module.model.ServletDefinition;
  import info.magnolia.module.model.ServletParameterDefinition;
  
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang.StringUtils;
  
  /**
   * Registers a servlet definition from a module descriptor into the /server/filters/servlets node.
   *
   * @see info.magnolia.module.model.ServletDefinition
   *
   * @author philipp
   * @version $Id$
   */
  public class RegisterServletTask extends AbstractTask {
      private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(RegisterServletTask.class);
  
      private static final String DEFAULT_SERVLET_FILTER_PATH = "/server/filters/servlets";
      private final ServletDefinition servletDefinition;
  
      public RegisterServletTask(ServletDefinition servletDefinition) {
          super("Servlet " + servletDefinition.getName(), "Registers servlet" + servletDefinition.getName() + " (" + servletDefinition.getComment() + ")");
          this.servletDefinition = servletDefinition;
      }
  
      @Override
      public void execute(InstallContext installContext) throws TaskExecutionException {
          log.debug("Registering servlet " + servletDefinition.getName() + " in servlet filter.");
  
          final String servletFilterPath = DEFAULT_SERVLET_FILTER_PATH;
  
          try {
              final Content servletNode = installContext.getConfigHierarchyManager().createContent(servletFilterPath, servletDefinition.getName(),
                      ItemType.CONTENTNODE.getSystemName());
              NodeDataUtil.getOrCreateAndSet(servletNode, "class", "info.magnolia.cms.filters.ServletDispatchingFilter");
              NodeDataUtil.getOrCreateAndSet(servletNode, "enabled", true);
              NodeDataUtil.getOrCreateAndSet(servletNode, "servletClass", servletDefinition.getClassName());
              NodeDataUtil.getOrCreateAndSet(servletNode, "servletName", servletDefinition.getName());
              NodeDataUtil.getOrCreateAndSet(servletNode, "comment", servletDefinition.getComment());
  
              final Content mappingsNode = servletNode.createContent("mappings", ItemType.CONTENTNODE);
              for (String pattern : servletDefinition.getMappings()) {
                  if (StringUtils.isBlank(pattern)) {
                      installContext.warn("Empty mappings configuration is not supported and servlet was not installed.");
                      continue;
                  }
                  String mappingNodeName = Path.getUniqueLabel(mappingsNode, Path.getValidatedLabel(pattern));
                  final Content mappingNode = mappingsNode.createContent(mappingNodeName, ItemType.CONTENTNODE);
                  NodeDataUtil.getOrCreateAndSet(mappingNode, "pattern", pattern);
              }
  
              final Content parametersNode = servletNode.createContent("parameters", ItemType.CONTENTNODE);
              for (ServletParameterDefinition parameter : servletDefinition.getParams()) {
                  NodeDataUtil.getOrCreateAndSet(parametersNode, parameter.getName(), parameter.getValue());
              }
          } catch (RepositoryException e) {
              log.error("Cannot create servlet node in servlet filter.", e);
          }
     }
 
     public ServletDefinition getServletDefinition() {
         return this.servletDefinition;
     }
 
 }