package org.paneris.bibliomania;
   
   import java.io.File;
   import java.io.FileOutputStream;
   import java.io.IOException;
   import java.util.Random;
   
   import javax.servlet.http.Cookie;
   import javax.servlet.http.HttpServletRequest;
  
  import org.melati.Melati;
  import org.melati.login.HttpSessionAccessHandler;
  import org.melati.util.HttpUtil;
  import org.melati.util.UnexpectedExceptionException;
  
  public class BibliomaniaAccessHandler extends HttpSessionAccessHandler {
    protected String loginPageServletClassName() {
      return "org.paneris.bibliomania.BibliomaniaLogin";
    }
  
    private static String key = null;
    private static final Random random = new Random();
  
    public String loginPageURL(Melati melati,
                               HttpServletRequest request) {
      StringBuffer url = new StringBuffer();
      HttpUtil.appendZoneURL(url, request);
      url.append('/');
      url.append(loginPageServletClassName());
  
      return url.toString();
    }
    
    
    public void logUsIn(Melati melati, org.melati.poem.User user) {
      super.logUsIn(melati,user);
  
      if (user == null) return;
  
      // funky code to to ensure users have logged in before accessing some
      // plain html pages
      // @see rewrites.apache
      
      if (key == null) {
        key = "" + random.nextInt();
        try {
          File tmpkeys = new File("/tmp/bibliomaniakey");
          if (!tmpkeys.exists())
            tmpkeys.mkdir();
          File[] old = tmpkeys.listFiles();
          for (int f = 0; f < old.length; ++f)
            old[f].delete();
          new FileOutputStream(new File(tmpkeys, key)).close();
        }
        catch (IOException e) {
          throw new UnexpectedExceptionException(e);
        }
      }
      Cookie c = new Cookie("reg", key);
      c.setPath("/");
      melati.getResponse().addCookie(c);
    }
  }