package at.gv.egovernment.moa.id.data;

import java.util.HashMap;

/**
 * The CookieManager is a singleton to manage a Cookie-Object for 
 * each session
 * @author Stefan Knirsch
 * @version $Id$
 * 
 */
public class CookieManager {
    /** the singleton instance of the CookieManager */
    private static CookieManager instance;
    /** a HashMap to bind a Cookie-object to every single session*/
    private static HashMap cookies = new HashMap();

  /**
   * Create a singleton of the CookieManager
   * @return CookieManager 
   */
  public static CookieManager getInstance()
  {
   if(instance==null) instance=new CookieManager();
   return instance;
  }
  
  /**
   * Save a cookie to a specified session-id
   * @param id               The session id
   * @param cookie_string    The complete 'Set-Cookie' String from the OnlineApplication
   */
  public void saveCookie(String id, String cookie_string)
  {
    getCookieWithID(id).setCookie(cookie_string);
  }
  
  /**
   * Method saveOldCookies.
   * @param id
   * @param cookie_string
   */
  public void saveOldCookies(String id,String cookie_string)
  {
    getCookieWithID(id).saveOldCookies(cookie_string);
  }
  
  /**
   * Get a Cookie-Object for a specified session-id
   * @param id   The session id
   * @return     Cookie object containing all saved cookies for this session
   */
  public Cookie getCookieWithID(String id)
  {
    Cookie c = null;
    if(cookies.containsKey(id)) 
      c = (Cookie)cookies.get(id);
      else 
      {
        c = new Cookie();
        cookies.put(id,c);
      }
      return c;
  }
  
  
  /**
    * Get a String containing all cookies of a specified session-id
    * saved in that session seperated by '; ' to be sent back to 
    * the Online-Application  
    * @param id the session-id
    * @return String containing all cookies saved in that session seperated by '; '
    */
  public String getCookie(String id)
  {
   Cookie result = (Cookie)cookies.get((String)id);
   if (result==null) 
       return null;
   return result.getCookies();
    
  }
  
 /**
   * Adds a Cookie for a special session from a response with 
   * response-code 401 to the cookie-pool for sending it back 
   * to the browser / client 
   * @param id     The session-id
   * @param value  The complete 'Set-Cookie' - String
   */
  public void add401(String id,String value)
  {
    getCookieWithID(id).add401(value);
  }
  
  /**
   * Clear the 401 cookie-pool of a session
   * @param id the session-id
   */
  public void clear401(String id)
  {
    getCookieWithID(id).clear401();    
  }
  
  /**
   * Get the HashMap containing all cookies of a session to be sent to the browser / client
   * @param id the session-id
   * @return HashMap with all cookies
   */
  public HashMap get401(String id)
  {
    return getCookieWithID(id).get401();    
  }

}