/**
    * This file Copyright (c) 2003-2010 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.beans.config.ContentRepository;
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.ItemType;
  import info.magnolia.cms.security.Permission;
  import info.magnolia.cms.util.NodeDataUtil;
  import info.magnolia.context.MgnlContext;
  
  import java.text.MessageFormat;
  import java.util.Iterator;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * This class is used to create the menud
   * @author Philipp Bracher
   * @version $Revision: 39191 $ ($Author: ochytil $)
   */
  public class Navigation {
  
  	private static final String CP_PREFIX = "contextPath + ";
  
      Logger log = LoggerFactory.getLogger(Navigation.class);
  
      /**
       * The node containing the menu and submenupoints
       */
      Content node;
  
      /**
       * The name of the Javascript variable
       */
      String jsName;
  
      /**
       * @param path the path to the menu
       */
      public Navigation(String path, String jsName) {
          try {
              // get it with system permission
              this.node = MgnlContext.getSystemContext().getHierarchyManager(ContentRepository.CONFIG).getContent(path);
              this.jsName = jsName;
          }
          catch (Exception e) {
              log.error("can't initialize the menu", e);
          }
      }
  
      /**
       * Generate the code to initialize the js navigation
       * @return the javascript
       */
      public String getJavascript() {
          StringBuffer str = new StringBuffer();
  
          // name, id, text, link, icon
          String nodePattern = "{0}.addNode (\"{1}\", \"{2}\", \"{3}\", {4}\"{5}\");\n";
          // name, parentId, id, text, link, icon
          String subPattern = "{0}.getNode(\"{1}\").addNode (\"{2}\", \"{3}\", \"{4}\", {5}\"{6}\");\n";
  
          // loop over the menupoints
          for (Iterator iter = node.getChildren(ItemType.CONTENTNODE).iterator(); iter.hasNext();) {
             Content mp = (Content) iter.next();
             // check permission
             if (isMenuPointRendered(mp)) {
                 String icon = NodeDataUtil.getString(mp, "icon");
                 String contextPath = "";
                 if (!"".equals(icon)) {
                     contextPath = CP_PREFIX;
                 }
                 str.append(MessageFormat.format(nodePattern, jsName,
                 mp.getUUID(),
                 getLabel(mp),
                 NodeDataUtil.getString(mp, "onclick"),
                 contextPath,
                 icon));
 
 
                 // sub menupoints (2 level only)
                 for (Iterator iterator = mp.getChildren(ItemType.CONTENTNODE).iterator(); iterator.hasNext();) {
                     Content sub = (Content) iterator.next();
                     if (isMenuPointRendered(sub)) {
                         String subIcon = NodeDataUtil.getString(sub, "icon");
                         String subContextPath = "";
                         if (!"".equals(subIcon)) {
                             subContextPath = CP_PREFIX;
                         }
                         str.append(MessageFormat.format(subPattern, jsName,
                         mp.getUUID(),
                         sub.getUUID(),
                         getLabel(sub),
                         NodeDataUtil.getString(sub, "onclick"),
                         subContextPath,
                         subIcon));
 
                     }
                 }
             }
         }
 
         return str.toString();
     }
 
     /**
      * @param mp
      * @return
      */
     protected Object getLabel(Content mp) {
         return NodeDataUtil.getI18NString(mp, "label");
     }
 
     /**
      * @param mp
      * @return
      */
     protected boolean isMenuPointRendered(Content mp) {
         return MgnlContext.getAccessManager(ContentRepository.CONFIG).isGranted(mp.getHandle(), Permission.READ);
     }
 
     /**
      * Get the first onclick in this menu. Used as the default src in the content iframe
      * @return the href
      */
     public String getFirstId() {
         return getFirstId(node);
     }
 
     private String getFirstId(Content node) {
         for (Iterator iter = node.getChildren(ItemType.CONTENTNODE).iterator(); iter.hasNext();) {
             Content sub = (Content) iter.next();
             if (isMenuPointRendered(sub)) {
                 if (StringUtils.isNotEmpty(NodeDataUtil.getString(sub, "onclick"))) {
                     return sub.getUUID();
                 }
                 String uuid = getFirstId(sub);
                 if (StringUtils.isNotEmpty(uuid)) {
                     return uuid;
                 }
             }
         }
         return "";
     }
 
 }