/*******************************************************************************
 * 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.synchronize.update.action;

import java.util.Iterator;
import java.util.List;

import org.eclipse.jface.action.IAction;
import org.eclipse.team.core.synchronize.FastSyncInfoFilter;
import org.eclipse.team.core.synchronize.SyncInfo;
import org.eclipse.team.svn.core.IStateFilter;
import org.eclipse.team.svn.core.operation.IActionOperation;
import org.eclipse.team.svn.core.synchronize.AbstractSVNSyncInfo;
import org.eclipse.team.svn.ui.lock.LockResource;
import org.eclipse.team.svn.ui.lock.LocksComposite;
import org.eclipse.team.svn.ui.lock.LockResource.LockStatusEnum;
import org.eclipse.team.svn.ui.synchronize.action.AbstractActionHelper;
import org.eclipse.team.ui.synchronize.ISynchronizePageConfiguration;

/**
 * Unlock action helper implementation for Synchronize View
 * 
 * @author Igor Burilo
 */
public class UnlockActionHelper extends AbstractActionHelper {
	
	public UnlockActionHelper(IAction action, ISynchronizePageConfiguration configuration) {
		super(action, configuration);
	}
	
	public FastSyncInfoFilter getSyncInfoFilter() {
		return new FastSyncInfoFilter() {
            public boolean select(SyncInfo info) {
                return super.select(info) && IStateFilter.SF_LOCKED.accept(((AbstractSVNSyncInfo)info).getLocalResource());
            }
        };
	}
	
	public IActionOperation getOperation() {		
		List<LockResource> lockResources = org.eclipse.team.svn.ui.action.local.LockAction.getLockResources(this.getSyncInfoSelector().getSelectedResources());
		if (lockResources != null) {
			Iterator<LockResource> iter = lockResources.iterator();
			while (iter.hasNext()) {
				LockResource lockResource = iter.next();
				if (lockResource.getLockStatus() != LockStatusEnum.LOCALLY_LOCKED) {
					iter.remove();
				}
			}
			return LocksComposite.performUnlockAction(lockResources.toArray(new LockResource[0]), this.configuration.getSite().getShell());			
		}
		return null;
	}

}