%%%----------------------------------------------------------------------
%%% File : mod_private.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Support for private storage.
%%% Created : 16 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2009 ProcessOne
%%%
%%% 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; if not, write to the Free Software
%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
-module(mod_private).
-author('alexey@process-one.net').
-behaviour(gen_mod).
-export([start/2,
stop/1,
process_sm_iq/3,
remove_user/2]).
-include("ejabberd.hrl").
-include("jlib.hrl").
-record(private_storage, {usns, xml}).
start(Host, Opts) ->
IQDisc = gen_mod:get_opt(iqdisc, Opts, one_queue),
mnesia:create_table(private_storage,
[{disc_only_copies, [node()]},
{attributes, record_info(fields, private_storage)}]),
update_table(),
ejabberd_hooks:add(remove_user, Host,
?MODULE, remove_user, 50),
gen_iq_handler:add_iq_handler(ejabberd_sm, Host, ?NS_PRIVATE,
?MODULE, process_sm_iq, IQDisc).
stop(Host) ->
ejabberd_hooks:delete(remove_user, Host,
?MODULE, remove_user, 50),
gen_iq_handler:remove_iq_handler(ejabberd_sm, Host, ?NS_PRIVATE).
process_sm_iq(From, _To, #iq{type = Type, sub_el = SubEl} = IQ) ->
#jid{luser = LUser, lserver = LServer} = From,
case lists:member(LServer, ?MYHOSTS) of
true ->
{xmlelement, Name, Attrs, Els} = SubEl,
case Type of
set ->
F = fun() ->
lists:foreach(
fun(El) ->
set_data(LUser, LServer, El)
end, Els)
end,
mnesia:transaction(F),
IQ#iq{type = result,
sub_el = [{xmlelement, Name, Attrs, []}]};
get ->
case catch get_data(LUser, LServer, Els) of
{'EXIT', _Reason} ->
IQ#iq{type = error,
sub_el = [SubEl,
?ERR_INTERNAL_SERVER_ERROR]};
Res ->
IQ#iq{type = result,
sub_el = [{xmlelement, Name, Attrs, Res}]}
end
end;
false ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_NOT_ALLOWED]}
end.
set_data(LUser, LServer, El) ->
case El of
{xmlelement, _Name, Attrs, _Els} ->
XMLNS = xml:get_attr_s("xmlns", Attrs),
case XMLNS of
"" ->
ignore;
_ ->
mnesia:write(
#private_storage{usns = {LUser, LServer, XMLNS},
xml = El})
end;
_ ->
ignore
end.
get_data(LUser, LServer, Els) ->
get_data(LUser, LServer, Els, []).
get_data(_LUser, _LServer, [], Res) ->
lists:reverse(Res);
get_data(LUser, LServer, [El | Els], Res) ->
case El of
{xmlelement, _Name, Attrs, _} ->
XMLNS = xml:get_attr_s("xmlns", Attrs),
case mnesia:dirty_read(private_storage, {LUser, LServer, XMLNS}) of
[R] ->
get_data(LUser, LServer, Els,
[R#private_storage.xml | Res]);
[] ->
get_data(LUser, LServer, Els,
[El | Res])
end;
_ ->
get_data(LUser, LServer, Els, Res)
end.
remove_user(User, Server) ->
LUser = jlib:nodeprep(User),
LServer = jlib:nameprep(Server),
F = fun() ->
Namespaces = mnesia:select(
private_storage,
[{#private_storage{usns={LUser, LServer, '$1'},
_ = '_'},
[],
['$$']}]),
lists:foreach(
fun([Namespace]) ->
mnesia:delete({private_storage,
{LUser, LServer, Namespace}})
end, Namespaces)
end,
mnesia:transaction(F).
update_table() ->
Fields = record_info(fields, private_storage),
case mnesia:table_info(private_storage, attributes) of
Fields ->
ok;
[userns, xml] ->
?INFO_MSG("Converting private_storage table from "
"{user, default, lists} format", []),
Host = ?MYNAME,
{atomic, ok} = mnesia:create_table(
mod_private_tmp_table,
[{disc_only_copies, [node()]},
{type, bag},
{local_content, true},
{record_name, private_storage},
{attributes, record_info(fields, private_storage)}]),
mnesia:transform_table(private_storage, ignore, Fields),
F1 = fun() ->
mnesia:write_lock_table(mod_private_tmp_table),
mnesia:foldl(
fun(#private_storage{usns = {U, NS}} = R, _) ->
mnesia:dirty_write(
mod_private_tmp_table,
R#private_storage{usns = {U, Host, NS}})
end, ok, private_storage)
end,
mnesia:transaction(F1),
mnesia:clear_table(private_storage),
F2 = fun() ->
mnesia:write_lock_table(private_storage),
mnesia:foldl(
fun(R, _) ->
mnesia:dirty_write(R)
end, ok, mod_private_tmp_table)
end,
mnesia:transaction(F2),
mnesia:delete_table(mod_private_tmp_table);
_ ->
?INFO_MSG("Recreating private_storage table", []),
mnesia:transform_table(private_storage, ignore, Fields)
end.
