/* 
 * @(#)NodeProcessorAction.java 
 * 
 * Copyright 2009 Instituto Superior Tecnico 
 * Founding Authors: João Figueiredo, Luis Cruz, Paulo Abrantes, Susana Fernandes 
 *  
 *      https://fenix-ashes.ist.utl.pt/ 
 *  
 *   This file is part of the Bennu Web Application Infrastructure. 
 * 
 *   The Bennu Web Application Infrastructure is free software: you can 
 *   redistribute it and/or modify it under the terms of the GNU Lesser General 
 *   Public License as published by the Free Software Foundation, either version  
 *   3 of the License, or (at your option) any later version. 
 * 
 *   Bennu is distributed in the hope that it will be useful, 
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
 *   GNU Lesser General Public License for more details. 
 * 
 *   You should have received a copy of the GNU Lesser General Public License 
 *   along with Bennu. If not, see <http://www.gnu.org/licenses/>. 
 *  
 */
package pt.ist.bennu.manager.presentation.actions;

import java.util.Collections;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import pt.ist.bennu.core.domain.VirtualHost;
import pt.ist.bennu.core.domain.contents.Node;
import pt.ist.bennu.core.presentation.Context;
import pt.ist.bennu.core.presentation.actions.ContextBaseAction;
import pt.ist.struts.dispatch.annotation.Mapping;

/**
 * 
 * @author Luis Cruz
 * 
 */
@Mapping(path = "/node")
public class NodeProcessorAction extends ContextBaseAction {
    public final ActionForward viewElement(final ActionMapping mapping, final ActionForm form, final HttpServletRequest request,
	    final HttpServletResponse response) throws Exception {
	final Context context = getContext(request);
	if (context.getElements().isEmpty()) {
	    Set<Node> nodes = VirtualHost.getVirtualHostForThread().getTopLevelNodesSet();
	    Node node = Collections.min(nodes);
	    context.push(node);
	}
	return context.forward("/page.jsp");
    }
}