(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: signup.ml,v 1.6 2004/09/23 11:56:47 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
open Cocanwiki_strings

let run r (q : cgi) (dbh : Dbi.connection) hostid _ _ =
  (* Verify that we're allowed to create accounts anonymously
   * on this host.
   *)
  let sth = dbh#prepare_cached "select create_account_anon from hosts
                                 where id = ?" in
  sth#execute [`Int hostid];

  let create_account_anon =
    match sth#fetch1 () with
	[ `Bool true ] -> ()
      | _ -> assert false in

  let username = trim (q#param "username") in
  let password1 = trim (q#param "password1") in
  let password2 = trim (q#param "password2") in

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

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

  let password = password1 in

  (*
    Uh oh ... Not making UNICODE assumptions ... XXX
  if String.length username > 32 || String.length password > 32 then
  *)

  let email = trim (q#param "email") in
  let email = if string_is_whitespace email then `Null else `String email in

  (* Not a duplicate? *)
  let sth = dbh#prepare_cached "select id from users
                                 where hostid = ? and name = ?" in
  sth#execute [`Int hostid; `String username];

  (try
     sth#fetch1 ();
     error ~back_button:true ~title:"Username already taken"
       q ("Someone, possibly you, has already taken that username. " ^
	  "If you think you have forgotten your password, try going back " ^
	  "and clicking on the 'Forgotten your password?' link.");
     return ()
   with
       Not_found -> ());

  (* Create the user account. *)
  let sth = dbh#prepare_cached "insert into users (name, password, email,
                                                   hostid)
                                values (?, ?, ?, ?)" in
  sth#execute [`String username; `String password; email; `Int hostid];

  let userid = sth#serial "users_id_seq" 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 ();

  let buttons = [ ok_button "/" ] in
  let cookie = Cookie.cookie ~name:"auth" ~value:cookie ~path:"/" () in

  ok ~title:"Account created"
    ~buttons
    ~cookie
    q ("An account was created for you, " ^ username ^ ". " ^
       "We hope you enjoy using this service.")

let () =
  register_script run