(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: logout.ml,v 1.5 2005/03/31 14:24:04 rich Exp $
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *)

open Apache
open Registry
open Cgi
open Printf

open Cocanwiki
open Cocanwiki_ok

let expires = "Sun, 09-Sep-2001 02:46:40 GMT"

let run r (q : cgi) (dbh : Dbi.connection) _ _ user =
  (* The logout function removes all of the associated cookies from the
   * database.  This isn't required, but is nice semantics, and also helps
   * to reduce the size of the usercookies table in the database.
   *)
  (match user with
       Anonymous -> ()
     | User (userid, _, _, _) ->
	 let sth = dbh#prepare_cached "delete from usercookies
                                        where userid = ?" in
	 sth#execute [`Int userid];

	 dbh#commit ()
  );

  let cookie = Cookie.cookie "auth" "none" ~path:"/" ~expires in

  ok ~title:"Logged out" ~buttons:[ok_button "/"] ~cookie
    q "You have been logged out."

let () =
  register_script run