(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: edit_user.ml,v 1.12 2006/03/27 19:10:29 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_strings
open Cocanwiki_ok

let run r (q : cgi) dbh hostid _ self =
  let userid = Int32.of_string (q#param "userid") in

  (* Get the user's original name.  If we're going to change the
   * name, we need to do additional checks.
   *)
  let original_name =
    List.hd (
      PGSQL(dbh)
	"select name from users where hostid = $hostid and id = $userid"
    ) in

  let name = trim (q#param "name") in

  if original_name <> name then (
    if name = "" then (
      error ~back_button:true ~title:"Bad username"
        dbh hostid q "The username you gave is empty.";
      return ()
    );

    (* Check it's not a duplicate, then change it. *)
    let rows = PGSQL(dbh)
      "select 1 from users where hostid = $hostid and name = $name" in

    (match rows with
     | [Some 1l] ->
	 error ~back_button:true ~title:"Username already taken"
	   dbh hostid q
	   ("That username has already been taken by another user.");
	 return ()
     | _ -> ()
    );

    PGSQL(dbh) "update users set name = $name
                 where hostid = $hostid and id = $userid"
  );

  (* Change permissions. *)
  let can_edit = q#param_true "can_edit" in
  let can_manage_users = q#param_true "can_manage_users" in
  let can_manage_contacts = q#param_true "can_manage_contacts" in
  let can_manage_site = q#param_true "can_manage_site" in
  let can_edit_global_css = q#param_true "can_edit_global_css" in
  let can_import_mail = q#param_true "can_import_mail" in

  (* Trying to remove manage users permission from self? *)
  (match can_manage_users, self with
     | false, User (id, _, _, _) when id = userid ->
	 error ~back_button:true ~title:"Remove manage users from self"
	   dbh hostid q
	   ("You tried to remove 'Manage users' permission from yourself. " ^
	    "You can't do this.  You'll have to do it from another " ^
	    "user account.");
	 return ()
     | _ -> ());

  PGSQL(dbh)
    "update users set
       can_edit = $can_edit, can_manage_users = $can_manage_users,
       can_manage_contacts = $can_manage_contacts,
       can_manage_site = $can_manage_site,
       can_edit_global_css = $can_edit_global_css,
       can_import_mail = $can_import_mail
     where hostid = $hostid and id = $userid";

  (* Finish up. *)
  PGOCaml.commit dbh;

  let buttons = [ ok_button "/_users" ] in
  ok ~buttons ~title:"Saved"
    dbh hostid q "Changes were saved."

let () =
  register_script ~restrict:[CanManageUsers] run