/*
    * 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.ui.workbench.internal.jcr.commands;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.argeo.cms.ui.jcr.model.SingleJcrNodeElem;
  import org.argeo.cms.ui.jcr.model.WorkspaceElem;
  import org.argeo.cms.ui.workbench.WorkbenchUiPlugin;
  import org.argeo.cms.ui.workbench.internal.jcr.parts.AddPrivilegeWizard;
  import org.argeo.eclipse.ui.EclipseUiException;
  import org.argeo.eclipse.ui.TreeParent;
  import org.argeo.eclipse.ui.dialogs.ErrorFeedback;
  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;
  import org.osgi.service.useradmin.UserAdmin;
  
  /** Open a dialog to add privileges on the selected node to a chosen group */
  public class AddPrivileges extends AbstractHandler {
  	public final static String ID = WorkbenchUiPlugin.PLUGIN_ID
  			+ ".addPrivileges";
  
  	/* DEPENDENCY INJECTION */
  	private UserAdmin userAdmin;
  
  	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 {
  				String targetPath = jcrParentNode.getPath();
  				AddPrivilegeWizard wizard = new AddPrivilegeWizard(
  						jcrParentNode.getSession(), targetPath, userAdmin);
  				WizardDialog dialog = new WizardDialog(
  						HandlerUtil.getActiveShell(event), wizard);
  				dialog.open();
  				return null;
  			} catch (RepositoryException re) {
  				throw new EclipseUiException("Unable to retrieve "
  						+ "path or JCR session to add privilege on "
  						+ jcrParentNode, re);
  			}
  		} else {
  			ErrorFeedback.show("Cannot add privileges");
  		}
  		return null;
  	}
  
  	/* DEPENDENCY INJECTION */
  	public void setUserAdmin(UserAdmin userAdmin) {
  		this.userAdmin = userAdmin;
  	}
  }