(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: change_password.ml,v 1.5 2006/03/27 18:09:46 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 run r (q : cgi) dbh hostid _ user =
  let old_password = q#param "old_password" in

  (* Check the old password was supplied correctly. *)
  let userid =
    match user with
	Anonymous -> assert false (* cannot happen *)
      | User (userid, _, _, _) -> userid in

  let rows = PGSQL(dbh)
    "select 1 from users
      where hostid = $hostid and id = $userid and password = $old_password" in

  let old_password_ok =
    match rows with
    | [Some 1l] -> true
    | [] -> false
    | _ -> assert false in

  if not old_password_ok then (
    error ~title:"Bad password"
      ~back_button:true
      dbh hostid q "The password you gave is wrong.";
    return ()
  );

  let password1 = q#param "password1" in
  let password2 = q#param "password2" in

  if password1 = "" || password2 = "" then (
    error ~back_button:true ~title:"Bad password"
      dbh hostid q "The password you gave is empty.";
    return ()
  );

  if password1 <> password2 then (
    error ~back_button:true ~title:"Passwords don't match"
      dbh hostid q "The two passwords you gave aren't identical.";
    return ()
  );

  let password = password1 in

  (* Change the password. *)
  PGSQL(dbh)
    "update users set password = $password, force_password_change = false
      where hostid = $hostid and id = $userid";

  PGOCaml.commit dbh;

  let buttons = [ ok_button "/" ] in
  ok ~buttons ~title:"Password changed"
    dbh hostid q "The password was changed."

let () =
  register_script ~anonymous:false run