/*
 * 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.jcr.ui.explorer.commands;

import javax.jcr.Node;
import javax.jcr.RepositoryException;

import org.argeo.ArgeoException;
import org.argeo.eclipse.ui.ErrorFeedback;
import org.argeo.eclipse.ui.TreeParent;
import org.argeo.jcr.ui.explorer.JcrExplorerPlugin;
import org.argeo.jcr.ui.explorer.model.SingleJcrNodeElem;
import org.argeo.jcr.ui.explorer.model.WorkspaceElem;
import org.argeo.jcr.ui.explorer.wizards.ChangeRightsWizard;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.ui.handlers.HandlerUtil;

/**
 * Open a dialog to change rights on the selected node.
 */

public class AddPrivileges extends AbstractHandler {
	public final static String ID = JcrExplorerPlugin.ID + ".addPrivileges";

	public Object execute(ExecutionEvent event) throws ExecutionException {

		ISelection selection = HandlerUtil.getActiveWorkbenchWindow(event)
				.getActivePage().getSelection();
		if (selection != null && !selection.isEmpty()
				&& selection instanceof IStructuredSelection) {
			Object obj = ((IStructuredSelection) selection).getFirstElement();
			TreeParent treeParentNode = null;
			Node jcrParentNode = null;

			if (obj instanceof SingleJcrNodeElem) {
				treeParentNode = (TreeParent) obj;
				jcrParentNode = ((SingleJcrNodeElem) treeParentNode).getNode();
			} else if (obj instanceof WorkspaceElem) {
				treeParentNode = (TreeParent) obj;
				jcrParentNode = ((WorkspaceElem) treeParentNode).getRootNode();
			} else
				return null;

			try {
				ChangeRightsWizard wizard = new ChangeRightsWizard(
						jcrParentNode.getSession(), jcrParentNode.getPath());
				WizardDialog dialog = new WizardDialog(
						HandlerUtil.getActiveShell(event), wizard);
				dialog.open();
				return null;
			} catch (RepositoryException re) {
				throw new ArgeoException(
						"Unexpected error while creating the new workspace.",
						re);
			}
		} else {
			ErrorFeedback.show("Cannot add privileges");
		}
		return null;
	}
}