//========================================================================
   //Copyright 2004-2008 Mort Bay Consulting Pty. Ltd.
   //------------------------------------------------------------------------
   //Licensed 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.eclipse.jetty.example.asyncrest;
  
  import java.io.IOException;
  import java.math.BigDecimal;
  import java.math.RoundingMode;
  import java.net.URLEncoder;
  import java.util.Map;
  import java.util.Queue;
  
  import javax.servlet.ServletConfig;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  /**
   * Abstract Servlet implementation class AsyncRESTServlet.
   * Enquires ebay REST service for auctions by key word.
   * May be configured with init parameters: <dl>
   * <dt>appid</dt><dd>The eBay application ID to use</dd>
   * </dl>
   * Each request examines the following request parameters:<dl>
   * <dt>items</dt><dd>The keyword to search for</dd>
   * </dl>
   */
  public class AbstractRestServlet extends HttpServlet
  {
      protected final static String __DEFAULT_APPID = "Webtide81-adf4-4f0a-ad58-d91e41bbe85";
      protected final static String STYLE = 
          "<style type='text/css'>"+
          "  img.thumb:hover {height:50px}"+
          "  img.thumb {vertical-align:text-top}"+
          "  span.red {color: #ff0000}"+
          "  span.green {color: #00ff00}"+
          "  iframe {border: 0px}"+
          "</style>";
  
      protected final static String ITEMS_PARAM = "items";
      protected final static String APPID_PARAM = "appid";
  
      protected String _appid;
  
      public void init(ServletConfig servletConfig) throws ServletException
      {
          if (servletConfig.getInitParameter(APPID_PARAM) == null)
              _appid = __DEFAULT_APPID;
          else
              _appid = servletConfig.getInitParameter(APPID_PARAM);
      }
      
      protected String restURL(String item) 
      {
          try
          {
              return ("http://open.api.ebay.com/shopping?MaxEntries=3&appid=" + _appid + 
                      "&version=573&siteid=0&callname=FindItems&responseencoding=JSON&QueryKeywords=" + 
                      URLEncoder.encode(item,"UTF-8"));
          }
          catch(Exception e)
          {
              throw new RuntimeException(e);
          }
      }
      
      protected String generateThumbs(Queue<Map<String,String>> results)
      {
          StringBuilder thumbs = new StringBuilder();
          for (Map<String, String> m : results)
          {
              if (!m.containsKey("GalleryURL"))
                  continue;
                  
              thumbs.append("<a href=\""+m.get("ViewItemURLForNaturalSearch")+"\">");
              thumbs.append("<img class='thumb' border='1px' height='25px'"+
                          " src='"+m.get("GalleryURL")+"'"+
                          " title='"+m.get("Title")+"'"+
                          "/>");
              thumbs.append("</a>&nbsp;");
          }
          return thumbs.toString();
      }
  
      protected String ms(long nano)
      {
          BigDecimal dec = new BigDecimal(nano);
         return dec.divide(new BigDecimal(1000000L)).setScale(1,RoundingMode.UP).toString();
     }
     
     protected int width(long nano)
     {
         int w=(int)((nano+999999L)/5000000L);
         if (w==0)
             w=2;
         return w;
     }
     
     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
     {
         doGet(request, response);
     }
 
 }