package org.melati.courteouspoem;
   
   import java.io.File;
   import java.io.IOException;
   
   import javax.servlet.ServletException;
   
   import org.melati.Melati;
  import org.melati.servlet.TemplateServlet;
  import org.melati.template.ServletTemplateContext;
  //import org.melati.courteouspoem.poem.CourteouspoemDatabase;
  
  /**
   * Base servlet for Courteouspoem servlets.
   */
  public abstract class CourteouspoemServlet extends TemplateServlet {
  
  
    public static final String templatePrefix = "org/melati/courteouspoem/view/";
  
    public String getSysAdminName () {
      return "TimP";
    }
    public String getSysAdminEmail () {
      return "timp@paneris.org";
    }
  
    /**
     * @see org.melati.servlet.ConfigServlet#doConfiguredRequest(org.melati.Melati)
     */
    protected void doConfiguredRequest(final Melati melati)
        throws ServletException, IOException {
      String pathInfo = melati.getRequest().getPathInfo();
      if (pathInfo == null) pathInfo = "";
  
      // check if pathinfo exists in filesystem
      // if so then redirect to it, unless we came from there
      while (pathInfo != "" && !fileAt(pathInfo)) {
        String s = pathInfo.substring(1);
        int i = s.indexOf('/');
        if (i != -1)
          pathInfo = s.substring(i);
        else
          pathInfo = "";
      }
      if (pathInfo != "") {
        String referer = melati.getRequest().getHeader("Referer");
        if (referer != null &&
            referer.indexOf(pathInfo) == -1) {
          melati.getResponse().sendRedirect(pathInfo);
          return;
        }
      }
      super.doConfiguredRequest(melati);
    }
    private boolean fileAt(String filename){
      if (filename.equals("")) return false;
      if (filename.equals("/")) return false;
      String fsName = "/dist/courteouspoem/www" + filename;
      File it = new File(fsName);
      return it.exists();
    }
  
    public String courteouspoemTemplate(String name) {
      return addExtension(templatePrefix + name);
    }
  
      // Override org.melati.TemplateServlet.addExtension()
      // to cope with heterogenous naming convention :)
    protected String addExtension(String templateName) {
      int index = templateName.indexOf(".wm");
      if (index == -1)
        templateName = templateName + ".wm";
      return templateName;
    }
  
    /**
     * Concrete class for {@link TemplateServlet}.
     *
     * @param melati
     * @param context
     * @return Template name
     */
    protected String doTemplateRequest(Melati melati, ServletTemplateContext context)
        throws Exception {
      return courteouspoemTemplate(reallyDoTemplateRequest(melati, context));
    }
  
    /**
     * Override this method to build up output in individual servlets.
     *
     * @return Template name without path or extension
     */
    protected abstract String
      reallyDoTemplateRequest(Melati melati,
                              ServletTemplateContext templateContext)
        throws Exception;
  
   protected String getSetting(Melati melati, String settingName) {
     String returnString = melati.getDatabase().getSettingTable().get(settingName);
     if (returnString == null)
       throw new RuntimeException("Setting " + settingName + " not found in setting table");
     return returnString;
   }
 
 }