/*******************************************************************************
 * Copyright (c) 2005-2008 Polarion Software.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Igor Burilo - Initial API and implementation
 *******************************************************************************/

package org.eclipse.team.svn.ui.operation;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.team.svn.core.connector.SVNConnectorAuthenticationException;
import org.eclipse.team.svn.core.connector.SVNConnectorCancelException;
import org.eclipse.team.svn.core.connector.SVNConnectorException;
import org.eclipse.team.svn.core.operation.AbstractActionOperation;
import org.eclipse.team.svn.core.resource.IRepositoryContainer;
import org.eclipse.team.svn.core.resource.IRepositoryResource;
import org.eclipse.team.svn.ui.SVNUIMessages;
import org.eclipse.team.svn.ui.utility.UIMonitorUtility;

/**
 * Get children for passed resource. If there're no children or 
 * problem happens during their retrieving then show dialog which says
 * that there're no branches/tags.
 * 
 * @author Igor Burilo
 */
public class GetBranchesTagsOperation extends AbstractActionOperation {

	protected IRepositoryContainer parent;
	protected boolean isBranch;
	protected IRepositoryResource []children;
		
	public GetBranchesTagsOperation(IRepositoryContainer parent, boolean isBranch) {		
		super("Operation_GetBranchesTags", SVNUIMessages.class); //$NON-NLS-1$
		this.parent = parent;
		this.isBranch = isBranch;
	}
	
	public IRepositoryResource[] getChildren() {
		return this.children == null ? new IRepositoryResource[0] : this.children;
	}
	
	protected void runImpl(IProgressMonitor monitor) throws Exception {		
		boolean hasError = false;
		try {
			this.children = this.parent.getChildren();
		} catch (SVNConnectorException se) {
			if (!(se instanceof SVNConnectorAuthenticationException || se instanceof SVNConnectorCancelException)) {
				hasError = true;				
			}
		}
		if (hasError || this.getChildren().length == 0) {			
			UIMonitorUtility.getDisplay().syncExec(new Runnable() {			
				public void run() {					
					MessageDialog dialog = new MessageDialog(
							UIMonitorUtility.getShell(),
							SVNUIMessages.ComparePropsNoDiff_Title,
							null,
							GetBranchesTagsOperation.this.isBranch ? SVNUIMessages.BranchTagSelectionComposite_NoBranches : SVNUIMessages.BranchTagSelectionComposite_NoTags,
							MessageDialog.INFORMATION,
							new String [] {IDialogConstants.OK_LABEL},
							0);
					dialog.open();
				}
			});			
		}
	}
}