/* 
 * @(#)RenderAction.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.renderers.actions;

import java.io.IOException;
import java.io.Writer;
import java.util.Properties;

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.fenixframework.DomainObject;
import pt.ist.renderers.OutputRenderer;
import pt.ist.renderers.components.HtmlComponent;
import pt.ist.renderers.contexts.OutputContext;
import pt.ist.renderers.model.MetaObjectFactory;
import pt.ist.renderers.schemas.Schema;
import pt.ist.renderers.utils.RenderKit;
import pt.ist.struts.dispatch.action.BennuDispatchAction;
import pt.ist.struts.dispatch.annotation.Mapping;

/**
 * 
 * @author Luis Cruz
 * @author Paulo Abrantes
 * 
 */
@Mapping(path = "/render")
public class RenderAction extends BennuDispatchAction {

    public ActionForward renderOutput(final ActionMapping mapping, final ActionForm form, final HttpServletRequest request,
	    final HttpServletResponse response) throws IOException {

	DomainObject domainObject = getDomainObject(request, "oid");
	String layout = request.getParameter("layout");
	String schema = request.getParameter("schema");
	String properties = request.getParameter("properties");

	RenderKit instance = RenderKit.getInstance();
	OutputContext context = new OutputContext();
	Schema realSchema = instance.findSchema(schema);

	context.setLayout(layout);
	context.setSchema(realSchema);
	if (properties != null) {
	    context.setProperties(readProperties(properties));
	}

	context.setMetaObject(MetaObjectFactory.createObject(domainObject, realSchema));

	OutputRenderer renderer = (OutputRenderer) instance.getRenderer(context, domainObject.getClass(), layout);
	HtmlComponent component = instance.renderUsing(renderer, context, domainObject, domainObject.getClass());

	response.setContentType("text/html;charset=UTF-8");
	Writer writer = response.getWriter();

	component.draw(writer);
	writer.flush();
	writer.close();

	return null;
    }

    private Properties readProperties(String propertiesString) {
	Properties properties = new Properties();
	for (String property : propertiesString.split("\\|")) {
	    String[] parts = property.split(":");
	    properties.put(parts[0], parts[1]);
	}
	return properties;
    }
}