/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed 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.argeo.slc.client.ui.commands;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.argeo.eclipse.ui.dialogs.ErrorFeedback;
  import org.argeo.eclipse.ui.dialogs.SingleValue;
  import org.argeo.slc.SlcException;
  import org.argeo.slc.client.ui.ClientUiPlugin;
  import org.argeo.slc.client.ui.model.ParentNodeFolder;
  import org.argeo.slc.client.ui.model.ResultFolder;
  import org.argeo.slc.jcr.SlcJcrResultUtils;
  import org.eclipse.core.commands.AbstractHandler;
  import org.eclipse.core.commands.ExecutionEvent;
  import org.eclipse.core.commands.ExecutionException;
  import org.eclipse.jface.viewers.IStructuredSelection;
  import org.eclipse.ui.handlers.HandlerUtil;
  
  /**
   * Add a new SlcType.SLC_RESULT_FOLDER node to the current user "my result"
   * tree. This handler is only intended to bu used with JcrResultTreeView and its
   * descendants.
   */
  
  public class AddResultFolder extends AbstractHandler {
  	public final static String ID = ClientUiPlugin.ID + ".addResultFolder";
  	public final static String DEFAULT_ICON_REL_PATH = "icons/addFolder.gif";
  	public final static String DEFAULT_LABEL = "Add folder...";
  
  	public Object execute(ExecutionEvent event) throws ExecutionException {
  		IStructuredSelection selection = (IStructuredSelection) HandlerUtil
  				.getActiveWorkbenchWindow(event).getActivePage().getSelection();
  
  		// Sanity check, already done when populating the corresponding popup
  		// menu.
  		if (selection != null && selection.size() == 1) {
  			Object obj = selection.getFirstElement();
  			try {
  				Node parentNode = null;
  				if (obj instanceof ResultFolder) {
  					ResultFolder rf = (ResultFolder) obj;
  					parentNode = rf.getNode();
  				} else if (obj instanceof ParentNodeFolder) {
  					Node node = ((ParentNodeFolder) obj).getNode();
  					if (node.getPath().startsWith(
  							SlcJcrResultUtils.getMyResultsBasePath(node
  									.getSession())))
  						parentNode = node;
  				}
  
  				if (parentNode != null) {
  					String folderName = SingleValue.ask("Folder name",
  							"Enter folder name");
  					if (folderName != null) {
  						if (folderName.contains("/")) {
  							ErrorFeedback
  									.show("Folder names can't contain a '/'.");
  							return null;
  						}
  
  						String absPath = parentNode.getPath() + "/"
  								+ folderName;
  						SlcJcrResultUtils.createResultFolderNode(
  								parentNode.getSession(), absPath);
  					}
  				}
  			} catch (RepositoryException e) {
  				throw new SlcException(
  						"Unexpected exception while creating result folder", e);
  			}
  		} else {
  			ErrorFeedback.show("Can only add file folder to a node");
  		}
  		return null;
  	}
  }