(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: login.ml,v 1.6 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 = "Wed, 18-May-2033 04:33:20 GMT"

let run r (q : cgi) (dbh : Dbi.connection) hostid _ _ =
  let username = q#param "username" in
  let password = q#param "password" in
  let permanent = try "1" = q#param "permanent" with Not_found -> false in
  let redirect = try q#param "redirect" with Not_found -> "/" in

  let sth = dbh#prepare_cached "select id, force_password_change from users
                                 where name = ? and password = ?
                                   and hostid = ?" in
  sth#execute [`String username; `String password; `Int hostid];

  try
    let userid, force_password_change =
      match sth#fetch1 () with
	  [ `Int userid; `Bool force_password_change ] ->
	    userid, force_password_change
	| _ -> assert false in

    (* Create a cookie. *)
    let cookie = random_sessionid () in
    let sth = dbh#prepare_cached "insert into usercookies (userid, cookie)
                                  values (?, ?)" in
    sth#execute [`Int userid; `String cookie];

    dbh#commit ();

    (* Force password change? *)
    let redirect =
      if force_password_change then "/_bin/change_password_form.cmo"
      else redirect in

    let cookie =
      if permanent then
	Cookie.cookie "auth" cookie ~path:"/" ~expires
      else
	Cookie.cookie "auth" cookie ~path:"/" in

    ok ~title:"Logged in" ~buttons:[ok_button redirect] ~cookie
      q ("Welcome " ^ username ^ "." ^
	 if force_password_change then "  Please change your password now."
	 else "")
  with
      Not_found ->
	error
	  ~title:"Bad name or password"
	  ~back_button:true
	  q "The name or password was wrong."

let () =
  register_script run