1 (* Copyright (C) 2004-2011, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
26 type session_id = Uuidm.t
28 (* user table: user id, (password, optional session id) *)
29 type user = string * (string * session_id option)
31 let user_tbl = (ref [] : user list ref)
33 (* session table: (user id, session id), matita status *)
34 type session = session_id * (MatitaEngine.status * MatitaEngine.status list)
36 let session_tbl = (ref [] : session list ref)
38 exception UsernameCollision of string
40 let lookup_user uid = List.assoc uid !user_tbl
42 let create_session uid =
43 let status = new MatitaEngine.status (Some uid) "cic:/matita" in
44 let history = [status] in
45 let pw,sid = List.assoc uid !user_tbl in
46 let clean_utbl = List.remove_assoc uid !user_tbl in
47 let new_session = Uuidm.create `V4 in
48 user_tbl := (uid,(pw,Some new_session))::clean_utbl;
49 let clean_stbl = match sid with
51 List.remove_assoc sid' !session_tbl
54 session_tbl := (new_session,(status,history))::clean_stbl;
58 let get_status sid = fst (List.assoc sid !session_tbl)
60 let get_history sid = snd (List.assoc sid !session_tbl)
62 let set_status sid st =
63 let oldst, hist = List.assoc sid !session_tbl in
64 session_tbl := (sid,(st,hist))::(List.remove_assoc sid !session_tbl)
66 let set_history sid hist =
67 let st, oldhist = List.assoc sid !session_tbl in
68 session_tbl := (sid,(st,hist))::(List.remove_assoc sid !session_tbl)
71 match List.assoc uid !user_tbl with
74 user_tbl := (uid,(pw,None))::List.remove_assoc uid !user_tbl;
75 session_tbl := List.remove_assoc sid !session_tbl
79 user_tbl := List.remove_assoc uid !user_tbl
82 (* serialization and deserialization of the user table *)
84 let path = Helm_registry.get "matita.basedir" in
85 let dirname = Filename.dirname path in
86 HExtlib.mkdir dirname;
91 let clean_utbl = List.map (fun (uid,(pw,_)) -> uid,(pw,None)) !user_tbl in
92 let utbl_ch = open_out (config_path () ^ "/usertable.dump") in
93 Marshal.to_channel utbl_ch clean_utbl [];
98 let utbl_ch = open_in (config_path () ^ "/usertable.dump") in
99 user_tbl := Marshal.from_channel utbl_ch;
101 (* old_sessions are now invalid *)
105 let add_user uid pw =
107 let _ = lookup_user uid in
108 raise (UsernameCollision uid)
110 user_tbl := (uid,(pw,None))::!user_tbl;