/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This 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 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.richfaces.context;

import java.io.IOException;
import java.io.Writer;

import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.servlet.http.HttpServletResponse;

import org.richfaces.log.Logger;
import org.richfaces.log.RichfacesLogger;
import org.richfaces.request.MultipartRequest;
import org.richfaces.request.MultipartRequest.ResponseState;

/**
 * @author Nick Belaevski
 *
 */
public class FileUploadPhaseListener implements PhaseListener {
    private static final long serialVersionUID = -3130357236442351405L;
    private static final Logger LOGGER = RichfacesLogger.CONTEXT.getLogger();

    public void afterPhase(PhaseEvent event) {
    }

    public void beforePhase(PhaseEvent event) {
        MultipartRequest multipartRequest = (MultipartRequest) event.getFacesContext().getExternalContext().getRequestMap()
            .get(MultipartRequest.REQUEST_ATTRIBUTE_NAME);
        if (multipartRequest != null) {
            if (multipartRequest.getResponseState() != ResponseState.ok) {
                printResponse(event.getFacesContext(), multipartRequest);
            }
        }
    }

    private void printResponse(FacesContext facesContext, MultipartRequest multipartRequest) {
        facesContext.responseComplete();
        ExternalContext externalContext = facesContext.getExternalContext();
        externalContext.setResponseStatus(HttpServletResponse.SC_OK);
        externalContext.setResponseContentType("text/html");
        try {
            Writer writer = externalContext.getResponseOutputWriter();
            writer.write("<html id=\"" + FileUploadFacesContextFactory.UID_KEY + multipartRequest.getUploadId() + ":"
                + multipartRequest.getResponseState() + "\"/>");
            writer.close();
        } catch (IOException e) {
            LOGGER.error(e.getMessage(), e);
        }
    }

    public PhaseId getPhaseId() {
        return PhaseId.RENDER_RESPONSE;
    }
}