(* 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 1.6 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_strings
open Cocanwiki_ok

let run r (q : cgi) (dbh : Dbi.connection) hostid _ self =
  let userid = int_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 sth = dbh#prepare_cached "select name from users
                                 where hostid = ? and id = ?" in
  sth#execute [`Int hostid; `Int userid];
  let original_name = sth#fetch1string () in

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

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

    (* Check it's not a duplicate, then change it. *)
    let sth = dbh#prepare_cached "select id from users
                                   where hostid = ? and name = ?" in
    sth#execute [`Int hostid; `String name];

    (try
       sth#fetch1 ();
       error ~back_button:true ~title:"Username already taken"
	 q ("That username has already been taken by another user.");
       return ()
     with
	 Not_found -> ());

    let sth = dbh#prepare_cached "update users set name = ?
                                   where hostid = ? and id = ?" in
    sth#execute [`String name; `Int hostid; `Int userid]
  );

  (* Change email address and permissions. *)
  let email = trim (q#param "email") in
  let email = if email = "" then `Null else `String email in

  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

  (* 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"
	   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 ()
     | _ -> ());

  let sth = dbh#prepare_cached "update users set email = ?,
                                       can_edit = ?, can_manage_users = ?,
                                       can_manage_contacts = ?,
                                       can_manage_site = ?,
                                       can_edit_global_css = ?
                                 where hostid = ? and id = ?" in
  sth#execute [email; `Bool can_edit; `Bool can_manage_users;
	       `Bool can_manage_contacts; `Bool can_manage_site;
	       `Bool can_edit_global_css;
	       `Int hostid; `Int userid];

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

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

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