text: /*******************************************************************************
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.apache.ofbiz.content.webapp.ftl;
  
  import java.io.IOException;
  import java.io.Writer;
  import java.util.Map;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.ofbiz.base.util.Debug;
  import org.apache.ofbiz.base.util.UtilCodec;
  import org.apache.ofbiz.base.util.UtilValidate;
  
  import freemarker.core.Environment;
  import freemarker.ext.beans.BeanModel;
  import freemarker.ext.beans.NumberModel;
  import freemarker.ext.beans.StringModel;
  import freemarker.template.SimpleNumber;
  import freemarker.template.SimpleScalar;
  import freemarker.template.TemplateModelException;
  import freemarker.template.TemplateTransformModel;
  import org.apache.ofbiz.entity.Delegator;
  import org.apache.ofbiz.entity.GenericEntityException;
  import org.apache.ofbiz.entity.GenericValue;
  import org.apache.ofbiz.entity.util.EntityQuery;
  import org.apache.ofbiz.webapp.WebAppUtil;
  
  public class OfbizContentAltUrlTransforms implements TemplateTransformModel {
      public final static String module = OfbizContentAltUrlTransforms.class.getName();
      private static final String defaultViewRequest = "contentViewInfo";
  
      public String getStringArg(Map args, String key) {
          Object o = args.get(key);
          if (o instanceof SimpleScalar) {
              return ((SimpleScalar) o).getAsString();
          } else if (o instanceof StringModel) {
              return ((StringModel) o).getAsString();
          } else if (o instanceof SimpleNumber) {
              return ((SimpleNumber) o).getAsNumber().toString();
          } else if (o instanceof NumberModel) {
              return ((NumberModel) o).getAsNumber().toString();
          }
          return null;
      }
      
      @Override
      public Writer getWriter(final Writer out, final Map args)
              throws TemplateModelException, IOException {
          final StringBuilder buf = new StringBuilder();
          return new Writer(out) {
              
              @Override
              public void write(char[] cbuf, int off, int len) throws IOException {
                  buf.append(cbuf, off, len);
              }
              
              @Override
              public void flush() throws IOException {
                  out.flush();
              }
              
              @Override
              public void close() throws IOException {
                  try {
                      Environment env = Environment.getCurrentEnvironment();
                      BeanModel req = (BeanModel) env.getVariable("request");
                      BeanModel res = (BeanModel) env.getVariable("response");
                      if (req != null) {
                          String contentId = getStringArg(args, "contentId");
                          String viewContent = getStringArg(args, "viewContent");
                          HttpServletRequest request = (HttpServletRequest) req.getWrappedObject();
                          HttpServletResponse response = null;
                          if (res != null) {
                              response = (HttpServletResponse) res.getWrappedObject();
                          }
                          String url = "";
                          if (UtilValidate.isNotEmpty(contentId)) {
                              url = makeContentAltUrl(request, response, contentId, viewContent);
                          }
                          out.write(url);
                      }
                  } catch (TemplateModelException e) {
                      throw new IOException(e.getMessage());
                  }
              }
          };
      }
  
      private static String makeContentAltUrl(HttpServletRequest request, HttpServletResponse response, String contentId, String viewContent) {
          if (UtilValidate.isEmpty(contentId)) {
              return null;
          }
          Delegator delegator = (Delegator) request.getAttribute("delegator");
          String url = null;
          try {
              GenericValue contentAssocDataResource = EntityQuery.use(delegator)
                      .select("contentIdStart", "drObjectInfo", "dataResourceId", "caFromDate", "caThruDate", "caCreatedDate")
                      .from("ContentAssocDataResourceViewTo")
                      .where("caContentAssocTypeId", "ALTERNATIVE_URL",
                              "caThruDate", null,
                              "contentIdStart", contentId)
                      .orderBy("-caFromDate")
                      .queryFirst();
              if (contentAssocDataResource != null) {
                  url = contentAssocDataResource.getString("drObjectInfo");
                  url = UtilCodec.getDecoder("url").decode(url);
                  String mountPoint = request.getContextPath();
                  if (!(mountPoint.equals("/")) && !(mountPoint.equals(""))) {
                      url = mountPoint + url;
                  }
              }
          } catch (GenericEntityException gee) {
              Debug.logWarning("[Exception] : " + gee.getMessage(), module);
          } catch (Exception e) {
              Debug.logWarning("[Exception] : " + e.getMessage(), module);
          }
  
          if (UtilValidate.isEmpty(url)) {
              if (UtilValidate.isEmpty(viewContent)) {
                  viewContent = defaultViewRequest;
              }
              url = makeContentUrl(request, response, contentId, viewContent);
          }
          return url;
      }
  
      private static String makeContentUrl(HttpServletRequest request, HttpServletResponse response, String contentId, String viewContent) {
          if (UtilValidate.isEmpty(contentId)) {
              return null;
          }
          StringBuilder urlBuilder = new StringBuilder();
          urlBuilder.append(request.getSession().getServletContext().getContextPath());
          if (urlBuilder.length() == 0 || urlBuilder.charAt(urlBuilder.length() - 1) != '/') {
              urlBuilder.append("/");
          }
          urlBuilder.append(WebAppUtil.CONTROL_MOUNT_POINT);
  
          if (UtilValidate.isNotEmpty(viewContent)) {
              urlBuilder.append("/" + viewContent);
          } else {
              urlBuilder.append("/" + defaultViewRequest);
          }
          urlBuilder.append("?contentId=" + contentId);
          return urlBuilder.toString();
      }
  
  }
  