import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.Cookie;

/** C O O K I E  S T U F F */
public class CookieMonster {
    /** Find a cookie by name; return first found */
    public static Cookie getCookie(HttpServletRequest request, String name) {
        Cookie[] allCookies;

        if ( name==null ) {
            throw new IllegalArgumentException("cookie name is null");
        }

        allCookies = request.getCookies();
        if (allCookies != null) {
            for (int i=0; i < allCookies.length; i++) {
                Cookie candidate = allCookies[i];
                if (name.equals(candidate.getName()) ) {
                    return candidate;
                }
            }
        }

        return null;
    }

    /** Find a cookie by name; return first found */
    public static String getCookieValue(HttpServletRequest request,
                                        String name)
    {
        Cookie c = getCookie(request, name);
        if ( c!=null ) {
            return c.getValue();
        }
        return null;
    }

    /** Set a cookie by name */
    public static void setCookieValue(HttpServletResponse response,
                                      String name,
                                      String value)
    {
        Cookie c = new Cookie(name,value);
        c.setMaxAge( 3 * 30 * 24 * 60 * 60 );
        c.setPath( "/" );
        response.addCookie( c );
    }

    private void killCookie(HttpServletResponse response, String name) {
	Cookie c = new Cookie(name,"false");
	c.setMaxAge( 0 ); // An age of 0 is defined to mean "delete cookie"
	c.setPath( "/" ); // for all subdirs
	response.addCookie( c );
    }
}