/*
 * $Id: OfbizContentTransform.java,v 1.1 2008/02/06 10:43:01 linkconsulting Exp $
 *
 * Copyright (c) 2001-2005 The Open For Business Project - www.ofbiz.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.ofbiz.webapp.ftl;

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

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

import org.ofbiz.webapp.taglib.ContentUrlTag;

import freemarker.core.Environment;
import freemarker.ext.beans.BeanModel;
import freemarker.template.TemplateModelException;
import freemarker.template.TemplateTransformModel;

/**
 * OfbizContentTransform - Freemarker Transform for content links
 *
 * @author     <a href="mailto:jaz@ofbiz.org">Andy Zeneski</a>
 * @version    $Rev: 5462 $
 * @since      2.1
 */
public class OfbizContentTransform implements TemplateTransformModel {
        
        public Writer getWriter(final Writer out, Map args) {              
            final StringBuffer buf = new StringBuffer();
            return new Writer(out) {
                public void write(char cbuf[], int off, int len) {
                    buf.append(cbuf, off, len);
                }

                public void flush() throws IOException {
                    out.flush();
                }

                public void close() throws IOException {  
                    try {                              
                        Environment env = Environment.getCurrentEnvironment();
                        BeanModel req = (BeanModel)env.getVariable("request");
                        BeanModel res = (BeanModel) env.getVariable("response");
                        HttpServletRequest request = (HttpServletRequest) req.getWrappedObject();
                        HttpServletResponse response = (HttpServletResponse) res.getWrappedObject();
                        ServletContext ctx = (ServletContext) request.getAttribute("servletContext");
                        
                        // make the link
                        StringBuffer newURL = new StringBuffer();
                        ContentUrlTag.appendContentPrefix(request, newURL);
                        newURL.append(buf.toString());                                        
                        out.write(newURL.toString());
                    } catch (TemplateModelException e) {
                        throw new IOException(e.getMessage());
                    }
                }
            };
        }
    }