/*
    * Copyright (C) 2003-2010 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, see<http://www.gnu.org/licenses/>.
   */
  package org.exoplatform.cs.common.ext;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import org.exoplatform.container.PortalContainer;
  import org.exoplatform.services.log.ExoLogger;
  import org.exoplatform.services.log.Log;
  import org.exoplatform.webui.core.UIComponent;
  import org.exoplatform.webui.core.UIContainer;
  import org.exoplatform.webui.ext.UIExtension;
  import org.exoplatform.webui.ext.UIExtensionManager;
  
  /**
   * Created by The eXo Platform SAS
   * Author : eXoPlatform
   *          exo@exoplatform.com
   * Dec 16, 2010  
   */
  public final class UIExtensionUtils {
    private static final Log logger = ExoLogger.getLogger(UIExtensionUtils.class);
    
    /**
     * get list of ui components by extenstion type and parent component.
     * @param extensionType - type of ui extenstion
     * @param parent - parent component
     * @param context
     * @return map of extension name and ui component.
     */
    public static Map<String, UIComponent> getComponents(String extensionType, UIContainer parent, Map<String, Object> context) {
      Map<String, UIComponent> components = new HashMap<String, UIComponent>();
      UIExtensionManager manager = (UIExtensionManager) PortalContainer.getInstance().getComponentInstance(UIExtensionManager.class);
      if (manager != null) {
        List<UIExtension> extensions = manager.getUIExtensions(extensionType);
        if (extensions != null) {
          for (UIExtension extension : extensions) {
            try {
              UIComponent component = manager.addUIExtension(extension, context, parent);
              if (component != null) components.put(extension.getName(), component);
            } catch (Exception e) {
              if (logger.isDebugEnabled()) logger.debug("failed to get ui component of uiextension: type=" + extensionType, e);
            }
          }
        }
      }
      return components;
    }
  }