/*
    * 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.cms.e4.jcr.handlers;
  
  import java.util.List;
  
  import javax.inject.Named;
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  
  import org.argeo.cms.e4.jcr.JcrBrowserView;
  import org.argeo.cms.ui.jcr.model.SingleJcrNodeElem;
  import org.argeo.eclipse.ui.EclipseUiException;
  import org.argeo.eclipse.ui.dialogs.SingleValue;
  import org.argeo.jcr.JcrUtils;
  import org.eclipse.e4.core.di.annotations.Execute;
  import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  import org.eclipse.e4.ui.services.IServiceConstants;
  import org.eclipse.e4.ui.workbench.modeling.EPartService;
  import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
  
  /**
   * Canonically call JCR Session#move(String, String) on the first element
   * returned by HandlerUtil#getActiveWorkbenchWindow()
   * (...getActivePage().getSelection()), if it is a {@link SingleJcrNodeElem}.
   * The user must then fill a new name in and confirm
   */
  public class RenameNode {
  	@Execute
  	public void execute(@Named(IServiceConstants.ACTIVE_PART) MPart part, EPartService partService,
  			ESelectionService selectionService) {
  		List<?> selection = (List<?>) selectionService.getSelection();
  		if (selection == null || selection.size() != 1)
  			return;
  		JcrBrowserView view = (JcrBrowserView) part.getObject();
  
  		Object element = selection.get(0);
  		if (element instanceof SingleJcrNodeElem) {
  			SingleJcrNodeElem sjn = (SingleJcrNodeElem) element;
  			Node node = sjn.getNode();
  			Session session = null;
  			String newName = null;
  			String oldPath = null;
  			try {
  				newName = SingleValue.ask("New node name", "Please provide a new name for [" + node.getName() + "]");
  				// TODO sanity check and user feedback
  				newName = JcrUtils.replaceInvalidChars(newName);
  				oldPath = node.getPath();
  				session = node.getSession();
  				session.move(oldPath, JcrUtils.parentPath(oldPath) + "/" + newName);
  				session.save();
  
  				// Manually refresh the browser view. Must be enhanced
  				view.refresh(sjn);
  			} catch (RepositoryException e) {
  				throw new EclipseUiException("Unable to rename " + node + " to " + newName, e);
  			}
  		}
  	}
  }