/* 
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
  package org.apache.jetspeed.portlets.security.roles;
  
  import java.io.IOException;
  import java.security.Principal;
  import java.sql.Types;
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  import javax.portlet.ActionRequest;
  import javax.portlet.ActionResponse;
  import javax.portlet.PortletConfig;
  import javax.portlet.PortletException;
  import javax.portlet.PortletMode;
  import javax.portlet.RenderRequest;
  import javax.portlet.RenderResponse;
  
  import org.apache.jetspeed.CommonPortletServices;
  import org.apache.jetspeed.portlets.security.SecurityResources;
  import org.apache.jetspeed.portlets.security.SecurityUtil;
  import org.apache.jetspeed.security.Role;
  import org.apache.jetspeed.security.RoleManager;
  import org.apache.jetspeed.security.SecurityException;
  import org.apache.portals.gems.browser.BrowserIterator;
  import org.apache.portals.gems.browser.DatabaseBrowserIterator;
  import org.apache.portals.gems.browser.BrowserPortlet;
  import org.apache.portals.gems.util.StatusMessage;
  import org.apache.portals.messaging.PortletMessaging;
  import org.apache.velocity.context.Context;
  
  /***
   * Role Browser - flat non-hierarchical view
   * 
   * @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
   * @version $Id: RoleBrowser.java 348264 2005-11-22 22:06:45Z taylor $
   */
  public class RoleBrowser extends BrowserPortlet
  {
      private RoleManager roleManager;
      
      public void init(PortletConfig config)
      throws PortletException 
      {
          super.init(config);
          roleManager = (RoleManager) 
              getPortletContext().getAttribute(CommonPortletServices.CPS_ROLE_MANAGER_COMPONENT);
          if (null == roleManager)
          {
              throw new PortletException("Failed to find the Role Manager on portlet initialization");
          }
      }
             
      public void getRows(RenderRequest request, String sql, int windowSize)
      {
          getRows(request, sql, windowSize, "");
      }
      
      public void getRows(RenderRequest request, String sql, int windowSize, String filter)
      {
          List resultSetTitleList = new ArrayList();
          List resultSetTypeList = new ArrayList();
          resultSetTypeList.add(String.valueOf(Types.VARCHAR));
          resultSetTitleList.add("role"); // resource bundle key
  
          List list = new ArrayList();
          try
          {
              Iterator roles = roleManager.getRoles(filter);
              
              while (roles.hasNext())
              {
                  Role role = (Role)roles.next();
                  
                  Principal principal = role.getPrincipal();                
                  list.add(principal.getName());
              }                        
          }
          catch (SecurityException sex)
          {
              SecurityUtil.publishErrorMessage(request, SecurityResources.TOPIC_ROLES, sex.getMessage());
          }                                    
          BrowserIterator iterator = new DatabaseBrowserIterator(list, resultSetTitleList, resultSetTypeList,windowSize);
          setBrowserIterator(request, iterator);
         iterator.sort("role"); // resource bundle key
     }
        
     public void doView(RenderRequest request, RenderResponse response)
     throws PortletException, IOException
     {
         String selected = (String)PortletMessaging.receive(request, SecurityResources.TOPIC_ROLES, SecurityResources.MESSAGE_SELECTED);
         if (selected != null)
         {        
             Context context = this.getContext(request);
             context.put("selected", selected);
         }
         StatusMessage msg = (StatusMessage)PortletMessaging.consume(request, SecurityResources.TOPIC_ROLES, SecurityResources.MESSAGE_STATUS);
         if (msg != null)
         {
             this.getContext(request).put("statusMsg", msg);            
         }
         
         String filtered = (String)PortletMessaging.receive(request, SecurityResources.TOPIC_ROLES, SecurityResources.MESSAGE_FILTERED);
         if (filtered != null)
         {
             this.getContext(request).put(FILTERED, "on");            
         }
 
         String refresh = (String)PortletMessaging.consume(request, SecurityResources.TOPIC_ROLES, SecurityResources.MESSAGE_REFRESH); 
         if (refresh != null)
         {        
             this.clearBrowserIterator(request);
         }                
                 
         ArrayList errorMessages = (ArrayList)PortletMessaging.consume(request, SecurityResources.TOPIC_ROLES, SecurityResources.ERROR_MESSAGES);
         if (errorMessages != null )
         {
             this.getContext(request).put(SecurityResources.ERROR_MESSAGES, errorMessages);
         }
         
         super.doView(request, response);
     }
 
     public void processAction(ActionRequest request, ActionResponse response)
     throws PortletException, IOException
     {
         if (request.getPortletMode() == PortletMode.VIEW)
         {
             String selected = request.getParameter("role");
             if (selected != null)
             {
                 Role role = lookupRole(request, selected);
                 if (role != null)
                 {
                     PortletMessaging.publish(request, SecurityResources.TOPIC_ROLES, SecurityResources.MESSAGE_SELECTED, selected);
                     PortletMessaging.publish(request, SecurityResources.TOPIC_ROLES, SecurityResources.MESSAGE_CHANGED, selected);
                 }
             }
         }
         
         String filtered = request.getParameter(FILTERED);
         if (filtered != null)
         {
             PortletMessaging.publish(request, SecurityResources.TOPIC_ROLES, SecurityResources.MESSAGE_FILTERED, "on");            
         }
         else
         {
             PortletMessaging.cancel(request, SecurityResources.TOPIC_ROLES, SecurityResources.MESSAGE_FILTERED);
         }
         
         super.processAction(request, response);
             
     }
 
     private Role lookupRole(ActionRequest actionRequest, String roleName)
     {
         try
         {
             return roleManager.getRole(roleName);
         }
         catch (SecurityException sex)
         {
             SecurityUtil.publishErrorMessage(actionRequest, SecurityResources.TOPIC_ROLES, sex.getMessage());
             return null;
         }
     }
 }