(* Copyright (C) 2004-2011, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM 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.
 * 
 * HELM 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 HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://helm.cs.unibo.it/
 *)

type session_id = Uuidm.t

(* user table: user id, (password, optional session id) *)
type user = string * (string * session_id option)

let user_tbl = (ref [] : user list ref)

let lookup_user uid = List.assoc uid !user_tbl

let get_users () = List.map fst !user_tbl

(* serialization and deserialization of the user table *)
let config_path () =
  let path = Helm_registry.get "matita.basedir" in
  let dirname = Filename.dirname path in
  HExtlib.mkdir dirname;
  path
;;

let deserialize () =
  try
    let utbl_ch = open_in (config_path () ^ "/usertable.dump.old") in
    user_tbl := Marshal.from_channel utbl_ch;
    close_in utbl_ch;
  with
    | Sys_error _ -> 
       user_tbl := []
;;

let _ =
  MatitaInit.initialize_all ();        
  deserialize ();
  let users = get_users () in
  List.iter
    (fun uid ->
     let pw,_ = lookup_user uid in
     MatitaAuthentication.add_user_no_checkout uid pw)
    users
;;