/*
 * Copyright (C) 2005 Alfresco, Inc.
 *
 * Licensed under the Mozilla Public License version 1.1 
 * with a permitted attribution clause. You may obtain a
 * copy of the License at
 *
 *   http://www.alfresco.org/legal/license.txt
 *
 * 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.alfresco.repo.ownable.impl;

import java.io.Serializable;
import java.util.HashMap;

import org.alfresco.model.ContentModel;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.cmr.repository.datatype.DefaultTypeConverter;
import org.alfresco.service.cmr.security.AuthenticationService;
import org.alfresco.service.cmr.security.OwnableService;
import org.alfresco.service.namespace.QName;
import org.springframework.beans.factory.InitializingBean;

public class OwnableServiceImpl implements OwnableService, InitializingBean
{
    private NodeService nodeService;
    
    private AuthenticationService authenticationService;

    public OwnableServiceImpl()
    {
        super();
    }

    // IOC
   
    public void setNodeService(NodeService nodeService)
    {
        this.nodeService = nodeService;
    }
    
    public void setAuthenticationService(AuthenticationService authenticationService)
    {
        this.authenticationService = authenticationService;
    }
    

    public void afterPropertiesSet() throws Exception
    {
        if(nodeService == null)
        {
            throw new IllegalArgumentException("A node service must be set");
        }
        if(authenticationService == null)
        {
            throw new IllegalArgumentException("An authentication service must be set");
        }
    }
    
    // OwnableService implmentation
    
  
    public String getOwner(NodeRef nodeRef)
    {
        String userName = null;
        // If ownership is not explicitly set then we fall back to the creator
        //
        if(nodeService.hasAspect(nodeRef, ContentModel.ASPECT_OWNABLE))
        {
           userName = DefaultTypeConverter.INSTANCE.convert(String.class, nodeService.getProperty(nodeRef, ContentModel.PROP_OWNER));
        }
        else if(nodeService.hasAspect(nodeRef, ContentModel.ASPECT_AUDITABLE))
        {
            userName = DefaultTypeConverter.INSTANCE.convert(String.class, nodeService.getProperty(nodeRef, ContentModel.PROP_CREATOR));
        }
        return userName;
    }

    public void setOwner(NodeRef nodeRef, String userName)
    {
        if(!nodeService.hasAspect(nodeRef, ContentModel.ASPECT_OWNABLE))
        {
            HashMap<QName, Serializable> properties = new HashMap<QName, Serializable>();
            properties.put(ContentModel.PROP_OWNER, userName);
            nodeService.addAspect(nodeRef, ContentModel.ASPECT_OWNABLE, properties);
        }
        else
        {
            nodeService.setProperty(nodeRef, ContentModel.PROP_OWNER, userName);
        }
        
    }

    public void takeOwnership(NodeRef nodeRef)
    {
        setOwner(nodeRef, authenticationService.getCurrentUserName());
    }

    public boolean hasOwner(NodeRef nodeRef)
    {
        return getOwner(nodeRef) != null;
    }

}