/*
    * Copyright (C) 2003-2012 eXo Platform SAS.
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
    * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.exoplatform.wcm.connector.collaboration;
  
  import java.util.Iterator;
  
  import javax.ws.rs.GET;
  import javax.ws.rs.Path;
  import javax.ws.rs.QueryParam;
  import javax.ws.rs.core.MediaType;
  import javax.ws.rs.core.Response;
  import javax.xml.parsers.DocumentBuilderFactory;
  import javax.xml.transform.dom.DOMSource;
  
  import org.exoplatform.portal.application.PortalRequestContext;
  import org.exoplatform.portal.config.UserPortalConfig;
  import org.exoplatform.portal.config.UserPortalConfigService;
  import org.exoplatform.portal.mop.SiteKey;
  import org.exoplatform.portal.mop.Visibility;
  import org.exoplatform.portal.mop.navigation.Scope;
  import org.exoplatform.portal.mop.user.UserNavigation;
  import org.exoplatform.portal.mop.user.UserNode;
  import org.exoplatform.portal.mop.user.UserNodeFilterConfig;
  import org.exoplatform.portal.mop.user.UserPortal;
  import org.exoplatform.services.rest.resource.ResourceContainer;
  import org.exoplatform.services.security.ConversationState;
  import org.exoplatform.services.wcm.utils.WCMCoreUtils;
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  /**
   * Created by The eXo Platform SAS
   * Author : Nguyen The Vinh From ECM Of eXoPlatform
   *          vinh_nguyen@exoplatform.com
   * 29 May 2012
   */
  @Path("/content/")
  public class NavigationConnector implements ResourceContainer{
    private static ThreadLocal<Boolean> gotNavigationKeeper = new ThreadLocal<Boolean>();
  
    /**
     * Return a JsonString include all navigation node
     * 
     * @param       portalName: Destination portal to get the navigation tree
     * @return
     * @throws      Exception
     */
    @GET
    @Path("/getFullNavigation/")
    public Response getFullNavigation ( @QueryParam("portalName") String portalName) throws Exception {
      String userName = ConversationState.getCurrent().getIdentity().getUserId();
      Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
      Element element = document.createElement("navigationXML");
      element.setTextContent(getNavigationAsJSON(portalName, userName));
      document.appendChild(element);
      return Response.ok(new DOMSource(document), MediaType.TEXT_XML).build();
    }
    private String getNavigationAsJSON(String portalName, String username) throws Exception {
  
      UserPortalConfigService userPortalConfigService = WCMCoreUtils.getService(UserPortalConfigService.class);
      UserPortalConfig userPortalCfg = userPortalConfigService.getUserPortalConfig(portalName,
          username,
          PortalRequestContext.USER_PORTAL_CONTEXT);
      UserPortal userPortal = userPortalCfg.getUserPortal();
  
      //filter nodes
      UserNodeFilterConfig.Builder filterConfigBuilder = UserNodeFilterConfig.builder();
      filterConfigBuilder.withReadWriteCheck().withVisibility(Visibility.DISPLAYED, Visibility.TEMPORAL);
      filterConfigBuilder.withTemporalCheck();
      UserNodeFilterConfig filterConfig = filterConfigBuilder.build();
  
      //get nodes
      UserNavigation navigation = userPortal.getNavigation(SiteKey.portal(portalName));
      UserNode root = userPortal.getNode(navigation, Scope.ALL, filterConfig, null);
  
      //set gotNavigation=true
      gotNavigationKeeper.set(true);
      return createJsonTree(navigation, root);
    }
    /**
     * Return a JsonString include all navigation node, serve for getNavigationAsJSON method
     * 
     * @param           navigation: Navigation information to create Json tree
     * @param           rootNode  : Root node of navigation
     * @return          A String as Json tree
     * @throws Exception
    */
   private String createJsonTree(UserNavigation navigation, UserNode rootNode) throws Exception {
     StringBuffer sbJsonTree = new StringBuffer();
     sbJsonTree.append("[");
     sbJsonTree.append("{");
     sbJsonTree.append("\"ownerId\":\"").append(navigation.getKey().getName()).append("\",");
     sbJsonTree.append("\"ownerType\":\"").append(navigation.getKey().getTypeName()).append("\",");
     sbJsonTree.append("\"priority\":\"").append(navigation.getPriority()).append("\",");
     sbJsonTree.append("\"nodes\":").append(addJsonNodes(rootNode.getChildren().iterator()));
     sbJsonTree.append("}");
     sbJsonTree.append("]");
     return sbJsonTree.toString();
   }
   /**
    * Build JsonTree for children nodes of navigation
    * 
    * @param           children
    * @return          StringBuffer contain Json tree of children
    */
   private StringBuffer addJsonNodes(Iterator<UserNode> children) {
     StringBuffer sbJsonTree = new StringBuffer();
     String resovleLabel = "";
     sbJsonTree.append("[");
     boolean first = true;
 
     while (children.hasNext()) {
       UserNode child = children.next();
       if (!first) {
         sbJsonTree.append(",");
       }
       first = false;
       sbJsonTree.append("{");
       sbJsonTree.append("\"icon\":").append(child.getIcon() != null ? "\"" + child.getIcon() + "\""
                                                                    : "null").append(",");
       sbJsonTree.append("\"label\":\"").append(child.getLabel()).append("\",");
       sbJsonTree.append("\"name\":\"").append(child.getName()).append("\",");
       try {
         resovleLabel = child.getResolvedLabel();
       } catch (NullPointerException npe) {
         resovleLabel = "";
       }
       sbJsonTree.append("\"resolvedLabel\":\"").append(resovleLabel).append("\",");
       sbJsonTree.append("\"uri\":\"").append(child.getURI()).append("\",");
 
       sbJsonTree.append("\"getNodeURL\":\"").append(child.getURI().toString()).append("\",");
       sbJsonTree.append("\"nodes\":").append(addJsonNodes(child.getChildren().iterator()));
       sbJsonTree.append("}");
     }
     sbJsonTree.append("]");
     return sbJsonTree;
   }
 }