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xmpp.chapril.org-ejabberd/src/mod_muc_room.erl
Evgeniy Khramtsov de81c50199 Revert "Support to provide password when subscribing to a room (#1306)" 
This reverts commit 566ac872fe.
2016-11-12 14:47:29 +03:00

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%%%----------------------------------------------------------------------
%%% File : mod_muc_room.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : MUC room stuff
%%% Created : 19 Mar 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2016 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.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%----------------------------------------------------------------------
-module(mod_muc_room).
-author('alexey@process-one.net').
-behaviour(gen_fsm).
%% External exports
-export([start_link/9,
start_link/7,
start/9,
start/7,
get_role/2,
get_affiliation/2,
is_occupant_or_admin/2,
route/4]).
%% gen_fsm callbacks
-export([init/1,
normal_state/2,
handle_event/3,
handle_sync_event/4,
handle_info/3,
terminate/3,
code_change/4]).
-include("ejabberd.hrl").
-include("logger.hrl").
-include("xmpp.hrl").
-include("mod_muc_room.hrl").
-define(MAX_USERS_DEFAULT_LIST,
[5, 10, 20, 30, 50, 100, 200, 500, 1000, 2000, 5000]).
-define(DEFAULT_MAX_USERS_PRESENCE,1000).
%-define(DBGFSM, true).
-ifdef(DBGFSM).
-define(FSMOPTS, [{debug, [trace]}]).
-else.
-define(FSMOPTS, []).
-endif.
-type state() :: #state{}.
-type fsm_stop() :: {stop, normal, state()}.
-type fsm_next() :: {next_state, normal_state, state()}.
-type fsm_transition() :: fsm_stop() | fsm_next().
-export_type([state/0]).
%%%----------------------------------------------------------------------
%%% API
%%%----------------------------------------------------------------------
start(Host, ServerHost, Access, Room, HistorySize, RoomShaper,
Creator, Nick, DefRoomOpts) ->
gen_fsm:start(?MODULE, [Host, ServerHost, Access, Room, HistorySize,
RoomShaper, Creator, Nick, DefRoomOpts],
?FSMOPTS).
start(Host, ServerHost, Access, Room, HistorySize, RoomShaper, Opts) ->
gen_fsm:start(?MODULE, [Host, ServerHost, Access, Room, HistorySize,
RoomShaper, Opts],
?FSMOPTS).
start_link(Host, ServerHost, Access, Room, HistorySize, RoomShaper,
Creator, Nick, DefRoomOpts) ->
gen_fsm:start_link(?MODULE, [Host, ServerHost, Access, Room, HistorySize,
RoomShaper, Creator, Nick, DefRoomOpts],
?FSMOPTS).
start_link(Host, ServerHost, Access, Room, HistorySize, RoomShaper, Opts) ->
gen_fsm:start_link(?MODULE, [Host, ServerHost, Access, Room, HistorySize,
RoomShaper, Opts],
?FSMOPTS).
%%%----------------------------------------------------------------------
%%% Callback functions from gen_fsm
%%%----------------------------------------------------------------------
init([Host, ServerHost, Access, Room, HistorySize,
RoomShaper, Creator, _Nick, DefRoomOpts]) ->
process_flag(trap_exit, true),
Shaper = shaper:new(RoomShaper),
State = set_affiliation(Creator, owner,
#state{host = Host, server_host = ServerHost,
access = Access, room = Room,
history = lqueue_new(HistorySize),
jid = jid:make(Room, Host, <<"">>),
just_created = true,
room_shaper = Shaper}),
State1 = set_opts(DefRoomOpts, State),
store_room(State1),
?INFO_MSG("Created MUC room ~s@~s by ~s",
[Room, Host, jid:to_string(Creator)]),
add_to_log(room_existence, created, State1),
add_to_log(room_existence, started, State1),
{ok, normal_state, State1};
init([Host, ServerHost, Access, Room, HistorySize, RoomShaper, Opts]) ->
process_flag(trap_exit, true),
Shaper = shaper:new(RoomShaper),
State = set_opts(Opts, #state{host = Host,
server_host = ServerHost,
access = Access,
room = Room,
history = lqueue_new(HistorySize),
jid = jid:make(Room, Host, <<"">>),
room_shaper = Shaper}),
add_to_log(room_existence, started, State),
{ok, normal_state, State}.
normal_state({route, From, <<"">>,
#message{type = Type, lang = Lang} = Packet}, StateData) ->
case is_user_online(From, StateData) orelse
is_subscriber(From, StateData) orelse
is_user_allowed_message_nonparticipant(From, StateData) of
true when Type == groupchat ->
Activity = get_user_activity(From, StateData),
Now = p1_time_compat:system_time(micro_seconds),
MinMessageInterval = trunc(gen_mod:get_module_opt(
StateData#state.server_host,
mod_muc, min_message_interval,
fun(MMI) when is_number(MMI) -> MMI end, 0)
* 1000000),
Size = element_size(Packet),
{MessageShaper, MessageShaperInterval} =
shaper:update(Activity#activity.message_shaper, Size),
if Activity#activity.message /= undefined ->
ErrText = <<"Traffic rate limit is exceeded">>,
Err = xmpp:make_error(
Packet,
xmpp:err_resource_constraint(ErrText, Lang)),
ejabberd_router:route(StateData#state.jid, From, Err),
{next_state, normal_state, StateData};
Now >= Activity#activity.message_time + MinMessageInterval,
MessageShaperInterval == 0 ->
{RoomShaper, RoomShaperInterval} =
shaper:update(StateData#state.room_shaper, Size),
RoomQueueEmpty = queue:is_empty(StateData#state.room_queue),
if RoomShaperInterval == 0, RoomQueueEmpty ->
NewActivity = Activity#activity{
message_time = Now,
message_shaper = MessageShaper},
StateData1 = store_user_activity(From,
NewActivity,
StateData),
StateData2 = StateData1#state{room_shaper =
RoomShaper},
process_groupchat_message(From, Packet,
StateData2);
true ->
StateData1 = if RoomQueueEmpty ->
erlang:send_after(RoomShaperInterval,
self(),
process_room_queue),
StateData#state{room_shaper =
RoomShaper};
true -> StateData
end,
NewActivity = Activity#activity{
message_time = Now,
message_shaper = MessageShaper,
message = Packet},
RoomQueue = queue:in({message, From},
StateData#state.room_queue),
StateData2 = store_user_activity(From,
NewActivity,
StateData1),
StateData3 = StateData2#state{room_queue = RoomQueue},
{next_state, normal_state, StateData3}
end;
true ->
MessageInterval = (Activity#activity.message_time +
MinMessageInterval - Now) div 1000,
Interval = lists:max([MessageInterval,
MessageShaperInterval]),
erlang:send_after(Interval, self(),
{process_user_message, From}),
NewActivity = Activity#activity{
message = Packet,
message_shaper = MessageShaper},
StateData1 = store_user_activity(From, NewActivity, StateData),
{next_state, normal_state, StateData1}
end;
true when Type == error ->
case is_user_online(From, StateData) of
true ->
ErrorText = <<"It is not allowed to send error messages to the"
" room. The participant (~s) has sent an error "
"message (~s) and got kicked from the room">>,
NewState = expulse_participant(Packet, From, StateData,
translate:translate(Lang,
ErrorText)),
close_room_if_temporary_and_empty(NewState);
_ ->
{next_state, normal_state, StateData}
end;
true when Type == chat ->
ErrText = <<"It is not allowed to send private messages "
"to the conference">>,
Err = xmpp:err_not_acceptable(ErrText, Lang),
ejabberd_router:route_error(StateData#state.jid, From, Packet, Err),
{next_state, normal_state, StateData};
true when Type == normal ->
{next_state, normal_state,
try xmpp:decode_els(Packet) of
Pkt -> process_normal_message(From, Pkt, StateData)
catch _:{xmpp_codec, Why} ->
Txt = xmpp:format_error(Why),
Err = xmpp:err_bad_request(Txt, Lang),
ejabberd_router:route_error(
StateData#state.jid, From, Packet, Err),
StateData
end};
true ->
ErrText = <<"Improper message type">>,
Err = xmpp:err_not_acceptable(ErrText, Lang),
ejabberd_router:route_error(StateData#state.jid, From, Packet, Err),
{next_state, normal_state, StateData};
false when Type /= error ->
handle_roommessage_from_nonparticipant(Packet, StateData, From),
{next_state, normal_state, StateData};
false ->
{next_state, normal_state, StateData}
end;
normal_state({route, From, <<"">>,
#iq{type = Type, lang = Lang, sub_els = [_]} = IQ0},
StateData) when Type == get; Type == set ->
try
case ejabberd_hooks:run_fold(
muc_process_iq,
StateData#state.server_host,
xmpp:set_from_to(xmpp:decode_els(IQ0),
From, StateData#state.jid),
[StateData]) of
ignore ->
{next_state, normal_state, StateData};
#iq{type = T} = IQRes when T == error; T == result ->
ejabberd_router:route(StateData#state.jid, From, IQRes),
{next_state, normal_state, StateData};
#iq{sub_els = [SubEl]} = IQ ->
Res1 = case xmpp:get_ns(SubEl) of
?NS_MUC_ADMIN ->
process_iq_admin(From, IQ, StateData);
?NS_MUC_OWNER ->
process_iq_owner(From, IQ, StateData);
?NS_DISCO_INFO when SubEl#disco_info.node == <<>> ->
process_iq_disco_info(From, IQ, StateData);
?NS_DISCO_ITEMS ->
process_iq_disco_items(From, IQ, StateData);
?NS_VCARD ->
process_iq_vcard(From, IQ, StateData);
?NS_MUCSUB ->
process_iq_mucsub(From, IQ, StateData);
?NS_CAPTCHA ->
process_iq_captcha(From, IQ, StateData);
_ ->
Txt = <<"The feature requested is not "
"supported by the conference">>,
{error, xmpp:err_service_unavailable(Txt, Lang)}
end,
{IQRes, NewStateData} =
case Res1 of
{result, Res, SD} ->
{xmpp:make_iq_result(IQ, Res), SD};
{result, Res} ->
{xmpp:make_iq_result(IQ, Res), StateData};
{ignore, SD} ->
{ignore, SD};
{error, Error, ResStateData} ->
{xmpp:make_error(IQ0, Error), ResStateData};
{error, Error} ->
{xmpp:make_error(IQ0, Error), StateData}
end,
if IQRes /= ignore ->
ejabberd_router:route(StateData#state.jid, From, IQRes);
true ->
ok
end,
case NewStateData of
stop ->
{stop, normal, StateData};
_ when NewStateData#state.just_created ->
close_room_if_temporary_and_empty(NewStateData);
_ ->
{next_state, normal_state, NewStateData}
end
end
catch _:{xmpp_codec, Why} ->
ErrTxt = xmpp:format_error(Why),
Err = xmpp:make_error(IQ0, xmpp:err_bad_request(ErrTxt, Lang)),
ejabberd_router:route(StateData#state.jid, From, Err)
end;
normal_state({route, From, <<"">>, #iq{} = IQ}, StateData) ->
Err = xmpp:err_bad_request(),
ejabberd_router:route_error(StateData#state.jid, From, IQ, Err),
case StateData#state.just_created of
true -> {stop, normal, StateData};
false -> {next_state, normal_state, StateData}
end;
normal_state({route, From, Nick, #presence{} = Packet}, StateData) ->
Activity = get_user_activity(From, StateData),
Now = p1_time_compat:system_time(micro_seconds),
MinPresenceInterval =
trunc(gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, min_presence_interval,
fun(I) when is_number(I), I>=0 ->
I
end, 0)
* 1000000),
if (Now >= Activity#activity.presence_time + MinPresenceInterval)
and (Activity#activity.presence == undefined) ->
NewActivity = Activity#activity{presence_time = Now},
StateData1 = store_user_activity(From, NewActivity,
StateData),
process_presence(From, Nick, Packet, StateData1);
true ->
if Activity#activity.presence == undefined ->
Interval = (Activity#activity.presence_time +
MinPresenceInterval - Now) div 1000,
erlang:send_after(Interval, self(),
{process_user_presence, From});
true -> ok
end,
NewActivity = Activity#activity{presence = {Nick, Packet}},
StateData1 = store_user_activity(From, NewActivity,
StateData),
{next_state, normal_state, StateData1}
end;
normal_state({route, From, ToNick,
#message{type = Type, lang = Lang} = Packet},
StateData) ->
case decide_fate_message(Packet, From, StateData) of
{expulse_sender, Reason} ->
?DEBUG(Reason, []),
ErrorText = <<"It is not allowed to send error messages to the"
" room. The participant (~s) has sent an error "
"message (~s) and got kicked from the room">>,
NewState = expulse_participant(Packet, From, StateData,
translate:translate(Lang, ErrorText)),
{next_state, normal_state, NewState};
forget_message ->
{next_state, normal_state, StateData};
continue_delivery ->
case {(StateData#state.config)#config.allow_private_messages,
is_user_online(From, StateData) orelse
is_subscriber(From, StateData)} of
{true, true} when Type == groupchat ->
ErrText = <<"It is not allowed to send private messages "
"of type \"groupchat\"">>,
Err = xmpp:err_bad_request(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, ToNick),
From, Packet, Err);
{true, true} ->
case find_jids_by_nick(ToNick, StateData) of
[] ->
ErrText = <<"Recipient is not in the conference room">>,
Err = xmpp:err_item_not_found(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, ToNick),
From, Packet, Err);
ToJIDs ->
SrcIsVisitor = is_visitor(From, StateData),
DstIsModerator = is_moderator(hd(ToJIDs), StateData),
PmFromVisitors =
(StateData#state.config)#config.allow_private_messages_from_visitors,
if SrcIsVisitor == false;
PmFromVisitors == anyone;
(PmFromVisitors == moderators) and
DstIsModerator ->
{FromNick, _} = get_participant_data(From, StateData),
FromNickJID =
jid:replace_resource(StateData#state.jid,
FromNick),
X = #muc_user{},
PrivMsg = xmpp:set_subtag(Packet, X),
[ejabberd_router:route(FromNickJID, ToJID, PrivMsg)
|| ToJID <- ToJIDs];
true ->
ErrText = <<"It is not allowed to send private messages">>,
Err = xmpp:err_forbidden(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, ToNick),
From, Packet, Err)
end
end;
{true, false} ->
ErrText = <<"Only occupants are allowed to send messages "
"to the conference">>,
Err = xmpp:err_not_acceptable(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, ToNick),
From, Packet, Err);
{false, _} ->
ErrText = <<"It is not allowed to send private messages">>,
Err = xmpp:err_forbidden(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, ToNick),
From, Packet, Err)
end,
{next_state, normal_state, StateData}
end;
normal_state({route, From, ToNick,
#iq{id = StanzaId, lang = Lang} = Packet},
StateData) ->
case {(StateData#state.config)#config.allow_query_users,
is_user_online_iq(StanzaId, From, StateData)} of
{true, {true, NewId, FromFull}} ->
case find_jid_by_nick(ToNick, StateData) of
false ->
ErrText = <<"Recipient is not in the conference room">>,
Err = xmpp:err_item_not_found(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, ToNick),
From, Packet, Err);
ToJID ->
{ok, #user{nick = FromNick}} =
(?DICT):find(jid:tolower(FromFull), StateData#state.users),
{ToJID2, Packet2} = handle_iq_vcard(ToJID, NewId, Packet),
ejabberd_router:route(
jid:replace_resource(StateData#state.jid, FromNick),
ToJID2, Packet2)
end;
{_, {false, _, _}} ->
ErrText = <<"Only occupants are allowed to send queries "
"to the conference">>,
Err = xmpp:err_not_acceptable(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, ToNick),
From, Packet, Err);
_ ->
ErrText = <<"Queries to the conference members are "
"not allowed in this room">>,
Err = xmpp:err_not_allowed(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, ToNick),
From, Packet, Err)
end,
{next_state, normal_state, StateData};
normal_state(_Event, StateData) ->
{next_state, normal_state, StateData}.
handle_event({service_message, Msg}, _StateName,
StateData) ->
MessagePkt = #message{type = groupchat, body = xmpp:mk_text(Msg)},
send_wrapped_multiple(
StateData#state.jid,
get_users_and_subscribers(StateData),
MessagePkt,
?NS_MUCSUB_NODES_MESSAGES,
StateData),
NSD = add_message_to_history(<<"">>,
StateData#state.jid, MessagePkt, StateData),
{next_state, normal_state, NSD};
handle_event({destroy, Reason}, _StateName,
StateData) ->
{result, undefined, stop} =
destroy_room(#muc_destroy{xmlns = ?NS_MUC_OWNER, reason = Reason},
StateData),
?INFO_MSG("Destroyed MUC room ~s with reason: ~p",
[jid:to_string(StateData#state.jid), Reason]),
add_to_log(room_existence, destroyed, StateData),
{stop, shutdown, StateData};
handle_event(destroy, StateName, StateData) ->
?INFO_MSG("Destroyed MUC room ~s",
[jid:to_string(StateData#state.jid)]),
handle_event({destroy, undefined}, StateName, StateData);
handle_event({set_affiliations, Affiliations},
StateName, StateData) ->
{next_state, StateName,
StateData#state{affiliations = Affiliations}};
handle_event(_Event, StateName, StateData) ->
{next_state, StateName, StateData}.
handle_sync_event({get_disco_item, Filter, JID, Lang}, _From, StateName, StateData) ->
Len = ?DICT:fold(fun(_, _, Acc) -> Acc + 1 end, 0,
StateData#state.users),
Reply = case (Filter == all) or (Filter == Len) or ((Filter /= 0) and (Len /= 0)) of
true ->
get_roomdesc_reply(JID, StateData,
get_roomdesc_tail(StateData, Lang));
false ->
false
end,
{reply, Reply, StateName, StateData};
%% This clause is only for backwards compatibility
handle_sync_event({get_disco_item, JID, Lang}, From, StateName, StateData) ->
handle_sync_event({get_disco_item, any, JID, Lang}, From, StateName, StateData);
handle_sync_event(get_config, _From, StateName,
StateData) ->
{reply, {ok, StateData#state.config}, StateName,
StateData};
handle_sync_event(get_state, _From, StateName,
StateData) ->
{reply, {ok, StateData}, StateName, StateData};
handle_sync_event({change_config, Config}, _From,
StateName, StateData) ->
{result, undefined, NSD} = change_config(Config, StateData),
{reply, {ok, NSD#state.config}, StateName, NSD};
handle_sync_event({change_state, NewStateData}, _From,
StateName, _StateData) ->
{reply, {ok, NewStateData}, StateName, NewStateData};
handle_sync_event({process_item_change, Item, UJID}, _From, StateName, StateData) ->
case process_item_change(Item, StateData, UJID) of
{error, _} = Err ->
{reply, Err, StateName, StateData};
NSD ->
{reply, {ok, NSD}, StateName, NSD}
end;
handle_sync_event(get_subscribers, _From, StateName, StateData) ->
JIDs = lists:map(fun jid:make/1,
?DICT:fetch_keys(StateData#state.subscribers)),
{reply, {ok, JIDs}, StateName, StateData};
handle_sync_event({muc_subscribe, From, Nick, Nodes}, _From,
StateName, StateData) ->
IQ = #iq{type = set, id = randoms:get_string(),
from = From, sub_els = [#muc_subscribe{nick = Nick,
events = Nodes}]},
Config = StateData#state.config,
CaptchaRequired = Config#config.captcha_protected,
PasswordProtected = Config#config.password_protected,
TmpConfig = Config#config{captcha_protected = false,
password_protected = false},
TmpState = StateData#state{config = TmpConfig},
case process_iq_mucsub(From, IQ, TmpState) of
{result, #muc_subscribe{events = NewNodes}, NewState} ->
NewConfig = (NewState#state.config)#config{
captcha_protected = CaptchaRequired,
password_protected = PasswordProtected},
{reply, {ok, NewNodes}, StateName,
NewState#state{config = NewConfig}};
{ignore, NewState} ->
NewConfig = (NewState#state.config)#config{
captcha_protected = CaptchaRequired,
password_protected = PasswordProtected},
{reply, {error, <<"Requrest is ignored">>},
NewState#state{config = NewConfig}};
{error, Err, NewState} ->
NewConfig = (NewState#state.config)#config{
captcha_protected = CaptchaRequired,
password_protected = PasswordProtected},
{reply, {error, get_error_text(Err)}, StateName,
NewState#state{config = NewConfig}};
{error, Err} ->
{reply, {error, get_error_text(Err)}, StateName, StateData}
end;
handle_sync_event({muc_unsubscribe, From}, _From, StateName, StateData) ->
IQ = #iq{type = set, id = randoms:get_string(),
from = From, sub_els = [#muc_unsubscribe{}]},
case process_iq_mucsub(From, IQ, StateData) of
{result, _, NewState} ->
{reply, ok, StateName, NewState};
{ignore, NewState} ->
{reply, {error, <<"Requrest is ignored">>}, NewState};
{error, Err, NewState} ->
{reply, {error, get_error_text(Err)}, StateName, NewState};
{error, Err} ->
{reply, {error, get_error_text(Err)}, StateName, StateData}
end;
handle_sync_event({is_subscribed, From}, _From, StateName, StateData) ->
IsSubs = ?DICT:is_key(jid:split(From), StateData#state.subscribers),
{reply, IsSubs, StateName, StateData};
handle_sync_event(_Event, _From, StateName,
StateData) ->
Reply = ok, {reply, Reply, StateName, StateData}.
code_change(_OldVsn, StateName, StateData, _Extra) ->
{ok, StateName, StateData}.
handle_info({process_user_presence, From}, normal_state = _StateName, StateData) ->
RoomQueueEmpty = queue:is_empty(StateData#state.room_queue),
RoomQueue = queue:in({presence, From}, StateData#state.room_queue),
StateData1 = StateData#state{room_queue = RoomQueue},
if RoomQueueEmpty ->
StateData2 = prepare_room_queue(StateData1),
{next_state, normal_state, StateData2};
true -> {next_state, normal_state, StateData1}
end;
handle_info({process_user_message, From},
normal_state = _StateName, StateData) ->
RoomQueueEmpty =
queue:is_empty(StateData#state.room_queue),
RoomQueue = queue:in({message, From},
StateData#state.room_queue),
StateData1 = StateData#state{room_queue = RoomQueue},
if RoomQueueEmpty ->
StateData2 = prepare_room_queue(StateData1),
{next_state, normal_state, StateData2};
true -> {next_state, normal_state, StateData1}
end;
handle_info(process_room_queue,
normal_state = StateName, StateData) ->
case queue:out(StateData#state.room_queue) of
{{value, {message, From}}, RoomQueue} ->
Activity = get_user_activity(From, StateData),
Packet = Activity#activity.message,
NewActivity = Activity#activity{message = undefined},
StateData1 = store_user_activity(From, NewActivity,
StateData),
StateData2 = StateData1#state{room_queue = RoomQueue},
StateData3 = prepare_room_queue(StateData2),
process_groupchat_message(From, Packet, StateData3);
{{value, {presence, From}}, RoomQueue} ->
Activity = get_user_activity(From, StateData),
{Nick, Packet} = Activity#activity.presence,
NewActivity = Activity#activity{presence = undefined},
StateData1 = store_user_activity(From, NewActivity,
StateData),
StateData2 = StateData1#state{room_queue = RoomQueue},
StateData3 = prepare_room_queue(StateData2),
process_presence(From, Nick, Packet, StateData3);
{empty, _} -> {next_state, StateName, StateData}
end;
handle_info({captcha_succeed, From}, normal_state,
StateData) ->
NewState = case (?DICT):find(From,
StateData#state.robots)
of
{ok, {Nick, Packet}} ->
Robots = (?DICT):store(From, passed,
StateData#state.robots),
add_new_user(From, Nick, Packet,
StateData#state{robots = Robots});
_ -> StateData
end,
{next_state, normal_state, NewState};
handle_info({captcha_failed, From}, normal_state,
StateData) ->
NewState = case (?DICT):find(From,
StateData#state.robots)
of
{ok, {Nick, Packet}} ->
Robots = (?DICT):erase(From, StateData#state.robots),
Txt = <<"The CAPTCHA verification has failed">>,
Lang = xmpp:get_lang(Packet),
Err = xmpp:err_not_authorized(Txt, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, Nick),
From, Packet, Err),
StateData#state{robots = Robots};
_ -> StateData
end,
{next_state, normal_state, NewState};
handle_info(shutdown, _StateName, StateData) ->
{stop, shutdown, StateData};
handle_info(_Info, StateName, StateData) ->
{next_state, StateName, StateData}.
terminate(Reason, _StateName, StateData) ->
?INFO_MSG("Stopping MUC room ~s@~s",
[StateData#state.room, StateData#state.host]),
ReasonT = case Reason of
shutdown ->
<<"You are being removed from the room "
"because of a system shutdown">>;
_ -> <<"Room terminates">>
end,
Packet = #presence{
type = unavailable,
sub_els = [#muc_user{items = [#muc_item{affiliation = none,
reason = ReasonT,
role = none}],
status_codes = [332]}]},
(?DICT):fold(fun (LJID, Info, _) ->
Nick = Info#user.nick,
case Reason of
shutdown ->
send_wrapped(jid:replace_resource(StateData#state.jid,
Nick),
Info#user.jid, Packet,
?NS_MUCSUB_NODES_PARTICIPANTS,
StateData);
_ -> ok
end,
tab_remove_online_user(LJID, StateData)
end,
[], get_users_and_subscribers(StateData)),
add_to_log(room_existence, stopped, StateData),
mod_muc:room_destroyed(StateData#state.host, StateData#state.room, self(),
StateData#state.server_host),
ok.
%%%----------------------------------------------------------------------
%%% Internal functions
%%%----------------------------------------------------------------------
-spec route(pid(), jid(), binary(), stanza()) -> ok.
route(Pid, From, ToNick, Packet) ->
gen_fsm:send_event(Pid, {route, From, ToNick, Packet}).
-spec process_groupchat_message(jid(), message(), state()) -> fsm_next().
process_groupchat_message(From, #message{lang = Lang} = Packet, StateData) ->
IsSubscriber = is_subscriber(From, StateData),
case is_user_online(From, StateData) orelse IsSubscriber orelse
is_user_allowed_message_nonparticipant(From, StateData)
of
true ->
{FromNick, Role} = get_participant_data(From, StateData),
if (Role == moderator) or (Role == participant) or IsSubscriber or
((StateData#state.config)#config.moderated == false) ->
Subject = check_subject(Packet),
{NewStateData1, IsAllowed} = case Subject of
false -> {StateData, true};
_ ->
case
can_change_subject(Role,
IsSubscriber,
StateData)
of
true ->
NSD =
StateData#state{subject
=
Subject,
subject_author
=
FromNick},
store_room(NSD),
{NSD, true};
_ -> {StateData, false}
end
end,
case IsAllowed of
true ->
case
ejabberd_hooks:run_fold(muc_filter_message,
StateData#state.server_host,
Packet,
[StateData,
StateData#state.jid,
From, FromNick])
of
drop ->
{next_state, normal_state, StateData};
NewPacket1 ->
NewPacket = xmpp:remove_subtag(NewPacket1, #nick{}),
Node = if Subject == false -> ?NS_MUCSUB_NODES_MESSAGES;
true -> ?NS_MUCSUB_NODES_SUBJECT
end,
send_wrapped_multiple(
jid:replace_resource(StateData#state.jid, FromNick),
get_users_and_subscribers(StateData),
NewPacket, Node, NewStateData1),
NewStateData2 = case has_body_or_subject(NewPacket) of
true ->
add_message_to_history(FromNick, From,
NewPacket,
NewStateData1);
false ->
NewStateData1
end,
{next_state, normal_state, NewStateData2}
end;
_ ->
Err = case (StateData#state.config)#config.allow_change_subj of
true ->
xmpp:err_forbidden(
<<"Only moderators and participants are "
"allowed to change the subject in this "
"room">>, Lang);
_ ->
xmpp:err_forbidden(
<<"Only moderators are allowed to change "
"the subject in this room">>, Lang)
end,
ejabberd_router:route_error(
StateData#state.jid, From, Packet, Err),
{next_state, normal_state, StateData}
end;
true ->
ErrText = <<"Visitors are not allowed to send messages "
"to all occupants">>,
Err = xmpp:err_forbidden(ErrText, Lang),
ejabberd_router:route_error(
StateData#state.jid, From, Packet, Err),
{next_state, normal_state, StateData}
end;
false ->
ErrText = <<"Only occupants are allowed to send messages "
"to the conference">>,
Err = xmpp:err_not_acceptable(ErrText, Lang),
ejabberd_router:route_error(StateData#state.jid, From, Packet, Err),
{next_state, normal_state, StateData}
end.
-spec process_normal_message(jid(), message(), state()) -> state().
process_normal_message(From, #message{lang = Lang} = Pkt, StateData) ->
Action = lists:foldl(
fun(_, {error, _} = Err) ->
Err;
(#muc_user{invites = [#muc_invite{to = undefined}]}, _) ->
Txt = <<"No 'to' attribute found">>,
{error, xmpp:err_bad_request(Txt, Lang)};
(#muc_user{invites = [I]}, _) ->
{ok, I};
(#muc_user{invites = [_|_]}, _) ->
Txt = <<"Multiple invitations are not allowed">>,
{error, xmpp:err_resource_constraint(Txt, Lang)};
(#xdata{type = submit, fields = Fs}, _) ->
try {ok, muc_request:decode(Fs)}
catch _:{muc_request, Why} ->
Txt = muc_request:format_error(Why),
{error, xmpp:err_bad_request(Txt, Lang)}
end;
(_, Acc) ->
Acc
end, ok, xmpp:get_els(Pkt)),
case Action of
{ok, #muc_invite{} = Invitation} ->
process_invitation(From, Pkt, Invitation, StateData);
{ok, [{role, participant}]} ->
process_voice_request(From, Pkt, StateData);
{ok, VoiceApproval} ->
process_voice_approval(From, Pkt, VoiceApproval, StateData);
{error, Err} ->
ejabberd_router:route_error(StateData#state.jid, From, Pkt, Err),
StateData;
ok ->
StateData
end.
-spec process_invitation(jid(), message(), muc_invite(), state()) -> state().
process_invitation(From, Pkt, Invitation, StateData) ->
Lang = xmpp:get_lang(Pkt),
case check_invitation(From, Invitation, Lang, StateData) of
{error, Error} ->
ejabberd_router:route_error(StateData#state.jid, From, Pkt, Error),
StateData;
IJID ->
Config = StateData#state.config,
case Config#config.members_only of
true ->
case get_affiliation(IJID, StateData) of
none ->
NSD = set_affiliation(IJID, member, StateData),
send_affiliation(IJID, member, StateData),
store_room(NSD),
NSD;
_ ->
StateData
end;
false ->
StateData
end
end.
-spec process_voice_request(jid(), message(), state()) -> state().
process_voice_request(From, Pkt, StateData) ->
Lang = xmpp:get_lang(Pkt),
case (StateData#state.config)#config.allow_voice_requests of
true ->
MinInterval = (StateData#state.config)#config.voice_request_min_interval,
BareFrom = jid:remove_resource(jid:tolower(From)),
NowPriority = -p1_time_compat:system_time(micro_seconds),
CleanPriority = NowPriority + MinInterval * 1000000,
Times = clean_treap(StateData#state.last_voice_request_time,
CleanPriority),
case treap:lookup(BareFrom, Times) of
error ->
Times1 = treap:insert(BareFrom,
NowPriority,
true, Times),
NSD = StateData#state{last_voice_request_time = Times1},
send_voice_request(From, Lang, NSD),
NSD;
{ok, _, _} ->
ErrText = <<"Please, wait for a while before sending "
"new voice request">>,
Err = xmpp:err_resource_constraint(ErrText, Lang),
ejabberd_router:route_error(
StateData#state.jid, From, Pkt, Err),
StateData#state{last_voice_request_time = Times}
end;
false ->
ErrText = <<"Voice requests are disabled in this conference">>,
Err = xmpp:err_forbidden(ErrText, Lang),
ejabberd_router:route_error(
StateData#state.jid, From, Pkt, Err),
StateData
end.
-spec process_voice_approval(jid(), message(), [muc_request:property()], state()) -> state().
process_voice_approval(From, Pkt, VoiceApproval, StateData) ->
Lang = xmpp:get_lang(Pkt),
case is_moderator(From, StateData) of
true ->
case lists:keyfind(jid, 1, VoiceApproval) of
{_, TargetJid} ->
Allow = proplists:get_bool(request_allow, VoiceApproval),
case is_visitor(TargetJid, StateData) of
true when Allow ->
Reason = <<>>,
NSD = set_role(TargetJid, participant, StateData),
catch send_new_presence(
TargetJid, Reason, NSD, StateData),
NSD;
_ ->
StateData
end;
false ->
ErrText = <<"Failed to extract JID from your voice "
"request approval">>,
Err = xmpp:err_bad_request(ErrText, Lang),
ejabberd_router:route_error(
StateData#state.jid, From, Pkt, Err),
StateData
end;
false ->
ErrText = <<"Only moderators can approve voice requests">>,
Err = xmpp:err_not_allowed(ErrText, Lang),
ejabberd_router:route_error(
StateData#state.jid, From, Pkt, Err),
StateData
end.
%% @doc Check if this non participant can send message to room.
%%
%% XEP-0045 v1.23:
%% 7.9 Sending a Message to All Occupants
%% an implementation MAY allow users with certain privileges
%% (e.g., a room owner, room admin, or service-level admin)
%% to send messages to the room even if those users are not occupants.
-spec is_user_allowed_message_nonparticipant(jid(), state()) -> boolean().
is_user_allowed_message_nonparticipant(JID,
StateData) ->
case get_service_affiliation(JID, StateData) of
owner -> true;
_ -> false
end.
%% @doc Get information of this participant, or default values.
%% If the JID is not a participant, return values for a service message.
-spec get_participant_data(jid(), state()) -> {binary(), role()}.
get_participant_data(From, StateData) ->
case (?DICT):find(jid:tolower(From),
StateData#state.users)
of
{ok, #user{nick = FromNick, role = Role}} ->
{FromNick, Role};
error ->
case ?DICT:find(jid:tolower(jid:remove_resource(From)),
StateData#state.subscribers) of
{ok, #subscriber{nick = FromNick}} ->
{FromNick, none};
error ->
{<<"">>, moderator}
end
end.
-spec process_presence(jid(), binary(), presence(), state()) -> fsm_transition().
process_presence(From, Nick, #presence{type = Type0} = Packet0, StateData) ->
IsOnline = is_user_online(From, StateData),
if Type0 == available;
IsOnline and ((Type0 == unavailable) or (Type0 == error)) ->
case ejabberd_hooks:run_fold(muc_filter_presence,
StateData#state.server_host,
Packet0,
[StateData,
StateData#state.jid,
From, Nick]) of
drop ->
{next_state, normal_state, StateData};
#presence{} = Packet ->
close_room_if_temporary_and_empty(
do_process_presence(From, Nick, Packet, StateData))
end;
true ->
{next_state, normal_state, StateData}
end.
-spec do_process_presence(jid(), binary(), presence(), state()) ->
state().
do_process_presence(From, Nick, #presence{type = available, lang = Lang} = Packet,
StateData) ->
case is_user_online(From, StateData) of
false ->
add_new_user(From, Nick, Packet, StateData);
true ->
case is_nick_change(From, Nick, StateData) of
true ->
case {nick_collision(From, Nick, StateData),
mod_muc:can_use_nick(StateData#state.server_host,
StateData#state.host,
From, Nick),
{(StateData#state.config)#config.allow_visitor_nickchange,
is_visitor(From, StateData)}} of
{_, _, {false, true}} ->
ErrText = <<"Visitors are not allowed to change their "
"nicknames in this room">>,
Err = xmpp:err_not_allowed(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, Nick),
From, Packet, Err),
StateData;
{true, _, _} ->
ErrText = <<"That nickname is already in use by another "
"occupant">>,
Err = xmpp:err_conflict(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, Nick),
From, Packet, Err),
StateData;
{_, false, _} ->
ErrText = <<"That nickname is registered by another "
"person">>,
Err = xmpp:err_conflict(ErrText, Lang),
ejabberd_router:route_error(
jid:replace_resource(StateData#state.jid, Nick),
From, Packet, Err),
StateData;
_ ->
change_nick(From, Nick, StateData)
end;
false ->
Stanza = maybe_strip_status_from_presence(
From, Packet, StateData),
NewState = add_user_presence(From, Stanza,
StateData),
send_new_presence(From, NewState, StateData),
NewState
end
end;
do_process_presence(From, Nick, #presence{type = unavailable} = Packet,
StateData) ->
NewPacket = case {(StateData#state.config)#config.allow_visitor_status,
is_visitor(From, StateData)} of
{false, true} ->
strip_status(Packet);
_ -> Packet
end,
NewState = add_user_presence_un(From, NewPacket, StateData),
case (?DICT):find(Nick, StateData#state.nicks) of
{ok, [_, _ | _]} -> ok;
_ -> send_new_presence(From, NewState, StateData)
end,
Reason = xmpp:get_text(NewPacket#presence.status),
remove_online_user(From, NewState, Reason);
do_process_presence(From, _Nick, #presence{type = error, lang = Lang} = Packet,
StateData) ->
ErrorText = <<"It is not allowed to send error messages to the"
" room. The participant (~s) has sent an error "
"message (~s) and got kicked from the room">>,
expulse_participant(Packet, From, StateData,
translate:translate(Lang, ErrorText)).
-spec maybe_strip_status_from_presence(jid(), presence(),
state()) -> presence().
maybe_strip_status_from_presence(From, Packet, StateData) ->
case {(StateData#state.config)#config.allow_visitor_status,
is_visitor(From, StateData)} of
{false, true} ->
strip_status(Packet);
_Allowed -> Packet
end.
-spec close_room_if_temporary_and_empty(state()) -> fsm_transition().
close_room_if_temporary_and_empty(StateData1) ->
case not (StateData1#state.config)#config.persistent
andalso (?DICT):size(StateData1#state.users) == 0
andalso (?DICT):size(StateData1#state.subscribers) == 0 of
true ->
?INFO_MSG("Destroyed MUC room ~s because it's temporary "
"and empty",
[jid:to_string(StateData1#state.jid)]),
add_to_log(room_existence, destroyed, StateData1),
{stop, normal, StateData1};
_ -> {next_state, normal_state, StateData1}
end.
get_users_and_subscribers(StateData) ->
OnlineSubscribers = ?DICT:fold(
fun(LJID, _, Acc) ->
LBareJID = jid:remove_resource(LJID),
case is_subscriber(LBareJID, StateData) of
true ->
?SETS:add_element(LBareJID, Acc);
false ->
Acc
end
end, ?SETS:new(), StateData#state.users),
?DICT:fold(
fun(LBareJID, #subscriber{nick = Nick}, Acc) ->
case ?SETS:is_element(LBareJID, OnlineSubscribers) of
false ->
?DICT:store(LBareJID,
#user{jid = jid:make(LBareJID),
nick = Nick,
role = none,
last_presence = undefined},
Acc);
true ->
Acc
end
end, StateData#state.users, StateData#state.subscribers).
-spec is_user_online(jid(), state()) -> boolean().
is_user_online(JID, StateData) ->
LJID = jid:tolower(JID),
(?DICT):is_key(LJID, StateData#state.users).
-spec is_subscriber(jid(), state()) -> boolean().
is_subscriber(JID, StateData) ->
LJID = jid:tolower(jid:remove_resource(JID)),
(?DICT):is_key(LJID, StateData#state.subscribers).
%% Check if the user is occupant of the room, or at least is an admin or owner.
-spec is_occupant_or_admin(jid(), state()) -> boolean().
is_occupant_or_admin(JID, StateData) ->
FAffiliation = get_affiliation(JID, StateData),
FRole = get_role(JID, StateData),
case FRole /= none orelse
FAffiliation == member orelse
FAffiliation == admin orelse FAffiliation == owner
of
true -> true;
_ -> false
end.
%%%
%%% Handle IQ queries of vCard
%%%
-spec is_user_online_iq(binary(), jid(), state()) ->
{boolean(), binary(), jid()}.
is_user_online_iq(StanzaId, JID, StateData)
when JID#jid.lresource /= <<"">> ->
{is_user_online(JID, StateData), StanzaId, JID};
is_user_online_iq(StanzaId, JID, StateData)
when JID#jid.lresource == <<"">> ->
try stanzaid_unpack(StanzaId) of
{OriginalId, Resource} ->
JIDWithResource = jid:replace_resource(JID, Resource),
{is_user_online(JIDWithResource, StateData), OriginalId,
JIDWithResource}
catch
_:_ -> {is_user_online(JID, StateData), StanzaId, JID}
end.
-spec handle_iq_vcard(jid(), binary(), iq()) -> {jid(), iq()}.
handle_iq_vcard(ToJID, NewId, #iq{type = Type, sub_els = SubEls} = IQ) ->
ToBareJID = jid:remove_resource(ToJID),
case SubEls of
[SubEl] when Type == get, ToBareJID /= ToJID ->
case xmpp:get_ns(SubEl) of
?NS_VCARD ->
{ToBareJID, change_stanzaid(ToJID, IQ)};
_ ->
{ToJID, xmpp:set_id(IQ, NewId)}
end;
_ ->
{ToJID, xmpp:set_id(IQ, NewId)}
end.
-spec stanzaid_pack(binary(), binary()) -> binary().
stanzaid_pack(OriginalId, Resource) ->
<<"berd",
(jlib:encode_base64(<<"ejab\000",
OriginalId/binary, "\000",
Resource/binary>>))/binary>>.
-spec stanzaid_unpack(binary()) -> {binary(), binary()}.
stanzaid_unpack(<<"berd", StanzaIdBase64/binary>>) ->
StanzaId = jlib:decode_base64(StanzaIdBase64),
[<<"ejab">>, OriginalId, Resource] =
str:tokens(StanzaId, <<"\000">>),
{OriginalId, Resource}.
-spec change_stanzaid(jid(), iq()) -> iq().
change_stanzaid(ToJID, #iq{id = PreviousId} = Packet) ->
NewId = stanzaid_pack(PreviousId, ToJID#jid.lresource),
xmpp:set_id(Packet, NewId).
%% Decide the fate of the message and its sender
%% Returns: continue_delivery | forget_message | {expulse_sender, Reason}
-spec decide_fate_message(message(), jid(), state()) ->
continue_delivery | forget_message |
{expulse_sender, binary()}.
decide_fate_message(#message{type = error} = Msg,
From, StateData) ->
Err = xmpp:get_error(Msg),
PD = case check_error_kick(Err) of
%% If this is an error stanza and its condition matches a criteria
true ->
Reason = str:format("This participant is considered a ghost "
"and is expulsed: ~s",
[jid:to_string(From)]),
{expulse_sender, Reason};
false -> continue_delivery
end,
case PD of
{expulse_sender, R} ->
case is_user_online(From, StateData) of
true -> {expulse_sender, R};
false -> forget_message
end;
Other -> Other
end;
decide_fate_message(_, _, _) -> continue_delivery.
%% Check if the elements of this error stanza indicate
%% that the sender is a dead participant.
%% If so, return true to kick the participant.
-spec check_error_kick(stanza_error()) -> boolean().
check_error_kick(#stanza_error{reason = Reason}) ->
case Reason of
#gone{} -> true;
'internal-server-error' -> true;
'item-not-found' -> true;
'jid-malformed' -> true;
'recipient-unavailable' -> true;
#redirect{} -> true;
'remote-server-not-found' -> true;
'remote-server-timeout' -> true;
'service-unavailable' -> true;
_ -> false
end;
check_error_kick(undefined) ->
false.
-spec get_error_condition(stanza_error()) -> string().
get_error_condition(#stanza_error{reason = Reason}) ->
case Reason of
#gone{} -> "gone";
#redirect{} -> "redirect";
Atom -> atom_to_list(Atom)
end;
get_error_condition(undefined) ->
"undefined".
get_error_text(Error) ->
case fxml:get_subtag_with_xmlns(Error, <<"text">>, ?NS_STANZAS) of
#xmlel{} = Tag ->
fxml:get_tag_cdata(Tag);
false ->
<<"">>
end.
-spec make_reason(stanza(), jid(), state(), binary()) -> binary().
make_reason(Packet, From, StateData, Reason1) ->
{ok, #user{nick = FromNick}} = (?DICT):find(jid:tolower(From), StateData#state.users),
Condition = get_error_condition(xmpp:get_error(Packet)),
str:format(Reason1, [FromNick, Condition]).
-spec expulse_participant(stanza(), jid(), state(), binary()) ->
state().
expulse_participant(Packet, From, StateData, Reason1) ->
Reason2 = make_reason(Packet, From, StateData, Reason1),
NewState = add_user_presence_un(From,
#presence{type = unavailable,
status = xmpp:mk_text(Reason2)},
StateData),
send_new_presence(From, NewState, StateData),
remove_online_user(From, NewState).
-spec set_affiliation(jid(), affiliation(), state()) -> state().
set_affiliation(JID, Affiliation, StateData) ->
set_affiliation(JID, Affiliation, StateData, <<"">>).
-spec set_affiliation(jid(), affiliation(), state(), binary()) -> state().
set_affiliation(JID, Affiliation, StateData, Reason) ->
LJID = jid:remove_resource(jid:tolower(JID)),
Affiliations = case Affiliation of
none ->
(?DICT):erase(LJID, StateData#state.affiliations);
_ ->
(?DICT):store(LJID, {Affiliation, Reason},
StateData#state.affiliations)
end,
StateData#state{affiliations = Affiliations}.
-spec get_affiliation(jid(), state()) -> affiliation().
get_affiliation(JID, StateData) ->
{_AccessRoute, _AccessCreate, AccessAdmin,
_AccessPersistent} =
StateData#state.access,
Res = case acl:match_rule(StateData#state.server_host,
AccessAdmin, JID)
of
allow -> owner;
_ ->
LJID = jid:tolower(JID),
case (?DICT):find(LJID, StateData#state.affiliations) of
{ok, Affiliation} -> Affiliation;
_ ->
LJID1 = jid:remove_resource(LJID),
case (?DICT):find(LJID1, StateData#state.affiliations)
of
{ok, Affiliation} -> Affiliation;
_ ->
LJID2 = setelement(1, LJID, <<"">>),
case (?DICT):find(LJID2,
StateData#state.affiliations)
of
{ok, Affiliation} -> Affiliation;
_ ->
LJID3 = jid:remove_resource(LJID2),
case (?DICT):find(LJID3,
StateData#state.affiliations)
of
{ok, Affiliation} -> Affiliation;
_ -> none
end
end
end
end
end,
case Res of
{A, _Reason} -> A;
_ -> Res
end.
-spec get_service_affiliation(jid(), state()) -> owner | none.
get_service_affiliation(JID, StateData) ->
{_AccessRoute, _AccessCreate, AccessAdmin,
_AccessPersistent} =
StateData#state.access,
case acl:match_rule(StateData#state.server_host,
AccessAdmin, JID)
of
allow -> owner;
_ -> none
end.
-spec set_role(jid(), role(), state()) -> state().
set_role(JID, Role, StateData) ->
LJID = jid:tolower(JID),
LJIDs = case LJID of
{U, S, <<"">>} ->
(?DICT):fold(fun (J, _, Js) ->
case J of
{U, S, _} -> [J | Js];
_ -> Js
end
end,
[], StateData#state.users);
_ ->
case (?DICT):is_key(LJID, StateData#state.users) of
true -> [LJID];
_ -> []
end
end,
{Users, Nicks} = case Role of
none ->
lists:foldl(fun (J, {Us, Ns}) ->
NewNs = case (?DICT):find(J, Us)
of
{ok,
#user{nick = Nick}} ->
(?DICT):erase(Nick,
Ns);
_ -> Ns
end,
{(?DICT):erase(J, Us), NewNs}
end,
{StateData#state.users,
StateData#state.nicks},
LJIDs);
_ ->
{lists:foldl(
fun (J, Us) ->
{ok, User} = (?DICT):find(J, Us),
if User#user.last_presence == undefined ->
Us;
true ->
(?DICT):store(J, User#user{role = Role}, Us)
end
end,
StateData#state.users, LJIDs),
StateData#state.nicks}
end,
StateData#state{users = Users, nicks = Nicks}.
-spec get_role(jid(), state()) -> role().
get_role(JID, StateData) ->
LJID = jid:tolower(JID),
case (?DICT):find(LJID, StateData#state.users) of
{ok, #user{role = Role}} -> Role;
_ -> none
end.
-spec get_default_role(affiliation(), state()) -> role().
get_default_role(Affiliation, StateData) ->
case Affiliation of
owner -> moderator;
admin -> moderator;
member -> participant;
outcast -> none;
none ->
case (StateData#state.config)#config.members_only of
true -> none;
_ ->
case (StateData#state.config)#config.members_by_default
of
true -> participant;
_ -> visitor
end
end
end.
-spec is_visitor(jid(), state()) -> boolean().
is_visitor(Jid, StateData) ->
get_role(Jid, StateData) =:= visitor.
-spec is_moderator(jid(), state()) -> boolean().
is_moderator(Jid, StateData) ->
get_role(Jid, StateData) =:= moderator.
-spec get_max_users(state()) -> non_neg_integer().
get_max_users(StateData) ->
MaxUsers = (StateData#state.config)#config.max_users,
ServiceMaxUsers = get_service_max_users(StateData),
if MaxUsers =< ServiceMaxUsers -> MaxUsers;
true -> ServiceMaxUsers
end.
-spec get_service_max_users(state()) -> pos_integer().
get_service_max_users(StateData) ->
gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, max_users,
fun(I) when is_integer(I), I>0 -> I end,
?MAX_USERS_DEFAULT).
-spec get_max_users_admin_threshold(state()) -> pos_integer().
get_max_users_admin_threshold(StateData) ->
gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, max_users_admin_threshold,
fun(I) when is_integer(I), I>0 -> I end,
5).
-spec get_user_activity(jid(), state()) -> #activity{}.
get_user_activity(JID, StateData) ->
case treap:lookup(jid:tolower(JID),
StateData#state.activity)
of
{ok, _P, A} -> A;
error ->
MessageShaper =
shaper:new(gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, user_message_shaper,
fun(A) when is_atom(A) -> A end,
none)),
PresenceShaper =
shaper:new(gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, user_presence_shaper,
fun(A) when is_atom(A) -> A end,
none)),
#activity{message_shaper = MessageShaper,
presence_shaper = PresenceShaper}
end.
-spec store_user_activity(jid(), #activity{}, state()) -> state().
store_user_activity(JID, UserActivity, StateData) ->
MinMessageInterval =
trunc(gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, min_message_interval,
fun(I) when is_number(I), I>=0 -> I end,
0)
* 1000),
MinPresenceInterval =
trunc(gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, min_presence_interval,
fun(I) when is_number(I), I>=0 -> I end,
0)
* 1000),
Key = jid:tolower(JID),
Now = p1_time_compat:system_time(micro_seconds),
Activity1 = clean_treap(StateData#state.activity,
{1, -Now}),
Activity = case treap:lookup(Key, Activity1) of
{ok, _P, _A} -> treap:delete(Key, Activity1);
error -> Activity1
end,
StateData1 = case MinMessageInterval == 0 andalso
MinPresenceInterval == 0 andalso
UserActivity#activity.message_shaper == none andalso
UserActivity#activity.presence_shaper == none
andalso
UserActivity#activity.message == undefined andalso
UserActivity#activity.presence == undefined
of
true -> StateData#state{activity = Activity};
false ->
case UserActivity#activity.message == undefined andalso
UserActivity#activity.presence == undefined
of
true ->
{_, MessageShaperInterval} =
shaper:update(UserActivity#activity.message_shaper,
100000),
{_, PresenceShaperInterval} =
shaper:update(UserActivity#activity.presence_shaper,
100000),
Delay = lists:max([MessageShaperInterval,
PresenceShaperInterval,
MinMessageInterval,
MinPresenceInterval])
* 1000,
Priority = {1, -(Now + Delay)},
StateData#state{activity =
treap:insert(Key, Priority,
UserActivity,
Activity)};
false ->
Priority = {0, 0},
StateData#state{activity =
treap:insert(Key, Priority,
UserActivity,
Activity)}
end
end,
StateData1.
-spec clean_treap(treap:treap(), integer()) -> treap:treap().
clean_treap(Treap, CleanPriority) ->
case treap:is_empty(Treap) of
true -> Treap;
false ->
{_Key, Priority, _Value} = treap:get_root(Treap),
if Priority > CleanPriority ->
clean_treap(treap:delete_root(Treap), CleanPriority);
true -> Treap
end
end.
-spec prepare_room_queue(state()) -> state().
prepare_room_queue(StateData) ->
case queue:out(StateData#state.room_queue) of
{{value, {message, From}}, _RoomQueue} ->
Activity = get_user_activity(From, StateData),
Packet = Activity#activity.message,
Size = element_size(Packet),
{RoomShaper, RoomShaperInterval} =
shaper:update(StateData#state.room_shaper, Size),
erlang:send_after(RoomShaperInterval, self(),
process_room_queue),
StateData#state{room_shaper = RoomShaper};
{{value, {presence, From}}, _RoomQueue} ->
Activity = get_user_activity(From, StateData),
{_Nick, Packet} = Activity#activity.presence,
Size = element_size(Packet),
{RoomShaper, RoomShaperInterval} =
shaper:update(StateData#state.room_shaper, Size),
erlang:send_after(RoomShaperInterval, self(),
process_room_queue),
StateData#state{room_shaper = RoomShaper};
{empty, _} -> StateData
end.
-spec update_online_user(jid(), #user{}, state()) -> state().
update_online_user(JID, #user{nick = Nick} = User, StateData) ->
LJID = jid:tolower(JID),
Nicks1 = case (?DICT):find(LJID, StateData#state.users) of
{ok, #user{nick = OldNick}} ->
case lists:delete(
LJID, ?DICT:fetch(OldNick, StateData#state.nicks)) of
[] ->
?DICT:erase(OldNick, StateData#state.nicks);
LJIDs ->
?DICT:store(OldNick, LJIDs, StateData#state.nicks)
end;
error ->
StateData#state.nicks
end,
Nicks = (?DICT):update(Nick,
fun (LJIDs) -> [LJID|LJIDs -- [LJID]] end,
[LJID], Nicks1),
Users = (?DICT):update(LJID,
fun(U) ->
U#user{nick = Nick}
end, User, StateData#state.users),
NewStateData = StateData#state{users = Users, nicks = Nicks},
case {?DICT:find(LJID, StateData#state.users),
?DICT:find(LJID, NewStateData#state.users)} of
{{ok, #user{nick = Old}}, {ok, #user{nick = New}}} when Old /= New ->
send_nick_changing(JID, Old, NewStateData, true, true);
_ ->
ok
end,
NewStateData.
set_subscriber(JID, Nick, Nodes, StateData) ->
BareJID = jid:remove_resource(JID),
LBareJID = jid:tolower(BareJID),
Subscribers = ?DICT:store(LBareJID,
#subscriber{jid = BareJID,
nick = Nick,
nodes = Nodes},
StateData#state.subscribers),
Nicks = ?DICT:store(Nick, [LBareJID], StateData#state.subscriber_nicks),
NewStateData = StateData#state{subscribers = Subscribers,
subscriber_nicks = Nicks},
store_room(NewStateData),
NewStateData.
-spec add_online_user(jid(), binary(), role(), state()) -> state().
add_online_user(JID, Nick, Role, StateData) ->
tab_add_online_user(JID, StateData),
User = #user{jid = JID, nick = Nick, role = Role},
update_online_user(JID, User, StateData).
-spec remove_online_user(jid(), state()) -> state().
remove_online_user(JID, StateData) ->
remove_online_user(JID, StateData, <<"">>).
-spec remove_online_user(jid(), state(), binary()) -> state().
remove_online_user(JID, StateData, Reason) ->
LJID = jid:tolower(JID),
{ok, #user{nick = Nick}} = (?DICT):find(LJID,
StateData#state.users),
add_to_log(leave, {Nick, Reason}, StateData),
tab_remove_online_user(JID, StateData),
Users = (?DICT):erase(LJID, StateData#state.users),
Nicks = case (?DICT):find(Nick, StateData#state.nicks)
of
{ok, [LJID]} ->
(?DICT):erase(Nick, StateData#state.nicks);
{ok, U} ->
(?DICT):store(Nick, U -- [LJID], StateData#state.nicks);
error -> StateData#state.nicks
end,
StateData#state{users = Users, nicks = Nicks}.
-spec filter_presence(presence()) -> presence().
filter_presence(Presence) ->
Els = lists:filter(
fun(El) ->
XMLNS = xmpp:get_ns(El),
case catch binary:part(XMLNS, 0, size(?NS_MUC)) of
?NS_MUC -> false;
_ -> true
end
end, xmpp:get_els(Presence)),
xmpp:set_els(Presence, Els).
-spec strip_status(presence()) -> presence().
strip_status(Presence) ->
Presence#presence{status = []}.
-spec add_user_presence(jid(), presence(), state()) -> state().
add_user_presence(JID, Presence, StateData) ->
LJID = jid:tolower(JID),
FPresence = filter_presence(Presence),
Users = (?DICT):update(LJID,
fun (#user{} = User) ->
User#user{last_presence = FPresence}
end,
StateData#state.users),
StateData#state{users = Users}.
-spec add_user_presence_un(jid(), presence(), state()) -> state().
add_user_presence_un(JID, Presence, StateData) ->
LJID = jid:tolower(JID),
FPresence = filter_presence(Presence),
Users = (?DICT):update(LJID,
fun (#user{} = User) ->
User#user{last_presence = FPresence,
role = none}
end,
StateData#state.users),
StateData#state{users = Users}.
%% Find and return a list of the full JIDs of the users of Nick.
%% Return jid record.
-spec find_jids_by_nick(binary(), state()) -> [jid()].
find_jids_by_nick(Nick, StateData) ->
Nicks = ?DICT:merge(fun(_, Val, _) -> Val end,
StateData#state.nicks,
StateData#state.subscriber_nicks),
case (?DICT):find(Nick, Nicks) of
{ok, [User]} -> [jid:make(User)];
{ok, Users} -> [jid:make(LJID) || LJID <- Users];
error -> []
end.
%% Find and return the full JID of the user of Nick with
%% highest-priority presence. Return jid record.
-spec find_jid_by_nick(binary(), state()) -> jid() | false.
find_jid_by_nick(Nick, StateData) ->
case (?DICT):find(Nick, StateData#state.nicks) of
{ok, [User]} -> jid:make(User);
{ok, [FirstUser | Users]} ->
#user{last_presence = FirstPresence} =
(?DICT):fetch(FirstUser, StateData#state.users),
{LJID, _} = lists:foldl(fun (Compare,
{HighestUser, HighestPresence}) ->
#user{last_presence = P1} =
(?DICT):fetch(Compare,
StateData#state.users),
case higher_presence(P1,
HighestPresence)
of
true -> {Compare, P1};
false ->
{HighestUser, HighestPresence}
end
end,
{FirstUser, FirstPresence}, Users),
jid:make(LJID);
error -> false
end.
-spec higher_presence(undefined | presence(),
undefined | presence()) -> boolean().
higher_presence(Pres1, Pres2) when Pres1 /= undefined, Pres2 /= undefined ->
Pri1 = get_priority_from_presence(Pres1),
Pri2 = get_priority_from_presence(Pres2),
Pri1 > Pri2;
higher_presence(Pres1, Pres2) ->
Pres1 > Pres2.
-spec get_priority_from_presence(presence()) -> integer().
get_priority_from_presence(#presence{priority = Prio}) ->
case Prio of
undefined -> 0;
_ -> Prio
end.
-spec find_nick_by_jid(jid(), state()) -> binary().
find_nick_by_jid(JID, StateData) ->
LJID = jid:tolower(JID),
{ok, #user{nick = Nick}} = (?DICT):find(LJID, StateData#state.users),
Nick.
-spec is_nick_change(jid(), binary(), state()) -> boolean().
is_nick_change(JID, Nick, StateData) ->
LJID = jid:tolower(JID),
case Nick of
<<"">> -> false;
_ ->
{ok, #user{nick = OldNick}} = (?DICT):find(LJID,
StateData#state.users),
Nick /= OldNick
end.
-spec nick_collision(jid(), binary(), state()) -> boolean().
nick_collision(User, Nick, StateData) ->
UserOfNick = case find_jid_by_nick(Nick, StateData) of
false ->
case ?DICT:find(Nick, StateData#state.subscriber_nicks) of
{ok, [J]} -> J;
error -> false
end;
J -> J
end,
(UserOfNick /= false andalso
jid:remove_resource(jid:tolower(UserOfNick))
/= jid:remove_resource(jid:tolower(User))).
-spec add_new_user(jid(), binary(), presence() | iq(), state()) ->
state() |
{error, stanza_error()} |
{ignore, state()} |
{result, xmpp_element(), state()}.
add_new_user(From, Nick, Packet, StateData) ->
Lang = xmpp:get_lang(Packet),
UserRoomJID = jid:replace_resource(StateData#state.jid, Nick),
MaxUsers = get_max_users(StateData),
MaxAdminUsers = MaxUsers +
get_max_users_admin_threshold(StateData),
NUsers = dict:fold(fun (_, _, Acc) -> Acc + 1 end, 0,
StateData#state.users),
Affiliation = get_affiliation(From, StateData),
ServiceAffiliation = get_service_affiliation(From,
StateData),
NConferences = tab_count_user(From),
MaxConferences =
gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, max_user_conferences,
fun(I) when is_integer(I), I>0 -> I end,
10),
Collision = nick_collision(From, Nick, StateData),
IsSubscribeRequest = not is_record(Packet, presence),
case {(ServiceAffiliation == owner orelse
((Affiliation == admin orelse Affiliation == owner)
andalso NUsers < MaxAdminUsers)
orelse NUsers < MaxUsers)
andalso NConferences < MaxConferences,
Collision,
mod_muc:can_use_nick(StateData#state.server_host,
StateData#state.host, From, Nick),
get_default_role(Affiliation, StateData)}
of
{false, _, _, _} when NUsers >= MaxUsers orelse NUsers >= MaxAdminUsers ->
Txt = <<"Too many users in this conference">>,
Err = xmpp:err_resource_constraint(Txt, Lang),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end;
{false, _, _, _} when NConferences >= MaxConferences ->
Txt = <<"You have joined too many conferences">>,
Err = xmpp:err_resource_constraint(Txt, Lang),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end;
{false, _, _, _} ->
Err = xmpp:err_service_unavailable(),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end;
{_, _, _, none} ->
Err = case Affiliation of
outcast ->
ErrText = <<"You have been banned from this room">>,
xmpp:err_forbidden(ErrText, Lang);
_ ->
ErrText = <<"Membership is required to enter this room">>,
xmpp:err_registration_required(ErrText, Lang)
end,
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end;
{_, true, _, _} ->
ErrText = <<"That nickname is already in use by another occupant">>,
Err = xmpp:err_conflict(ErrText, Lang),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end;
{_, _, false, _} ->
ErrText = <<"That nickname is registered by another person">>,
Err = xmpp:err_conflict(ErrText, Lang),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end;
{_, _, _, Role} ->
case check_password(ServiceAffiliation, Affiliation,
Packet, From, StateData)
of
true ->
Nodes = get_subscription_nodes(Packet),
NewStateData =
if not IsSubscribeRequest ->
NewState = add_user_presence(
From, Packet,
add_online_user(From, Nick, Role,
StateData)),
send_existing_presences(From, NewState),
send_initial_presence(From, NewState, StateData),
History = get_history(Nick, Packet, NewState),
send_history(From, History, NewState),
send_subject(From, StateData),
NewState;
true ->
set_subscriber(From, Nick, Nodes, StateData)
end,
ResultState =
case NewStateData#state.just_created of
true ->
NewStateData#state{just_created = false};
false ->
Robots = (?DICT):erase(From, StateData#state.robots),
NewStateData#state{robots = Robots}
end,
if not IsSubscribeRequest -> ResultState;
true -> {result, subscribe_result(Packet), ResultState}
end;
nopass ->
ErrText = <<"A password is required to enter this room">>,
Err = xmpp:err_not_authorized(ErrText, Lang),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end;
captcha_required ->
SID = xmpp:get_id(Packet),
RoomJID = StateData#state.jid,
To = jid:replace_resource(RoomJID, Nick),
Limiter = {From#jid.luser, From#jid.lserver},
case ejabberd_captcha:create_captcha(SID, RoomJID, To,
Lang, Limiter, From)
of
{ok, ID, Body, CaptchaEls} ->
MsgPkt = #message{id = ID, body = Body,
sub_els = CaptchaEls},
Robots = (?DICT):store(From, {Nick, Packet},
StateData#state.robots),
ejabberd_router:route(RoomJID, From, MsgPkt),
NewState = StateData#state{robots = Robots},
if not IsSubscribeRequest ->
NewState;
true ->
{ignore, NewState}
end;
{error, limit} ->
ErrText = <<"Too many CAPTCHA requests">>,
Err = xmpp:err_resource_constraint(ErrText, Lang),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end;
_ ->
ErrText = <<"Unable to generate a CAPTCHA">>,
Err = xmpp:err_internal_server_error(ErrText, Lang),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end
end;
_ ->
ErrText = <<"Incorrect password">>,
Err = xmpp:err_not_authorized(ErrText, Lang),
ErrPacket = xmpp:make_error(Packet, Err),
if not IsSubscribeRequest ->
ejabberd_router:route(UserRoomJID, From, ErrPacket),
StateData;
true ->
{error, Err}
end
end
end.
-spec check_password(affiliation(), affiliation(),
stanza(), jid(), state()) -> boolean() | nopass.
check_password(owner, _Affiliation, _Packet, _From,
_StateData) ->
%% Don't check pass if user is owner in MUC service (access_admin option)
true;
check_password(_ServiceAffiliation, Affiliation, Packet,
From, StateData) ->
case (StateData#state.config)#config.password_protected
of
false -> check_captcha(Affiliation, From, StateData);
true ->
Pass = extract_password(Packet),
case Pass of
false -> nopass;
_ ->
case (StateData#state.config)#config.password of
Pass -> true;
_ -> false
end
end
end.
-spec check_captcha(affiliation(), jid(), state()) -> true | captcha_required.
check_captcha(Affiliation, From, StateData) ->
case (StateData#state.config)#config.captcha_protected
andalso ejabberd_captcha:is_feature_available()
of
true when Affiliation == none ->
case (?DICT):find(From, StateData#state.robots) of
{ok, passed} -> true;
_ ->
WList =
(StateData#state.config)#config.captcha_whitelist,
#jid{luser = U, lserver = S, lresource = R} = From,
case (?SETS):is_element({U, S, R}, WList) of
true -> true;
false ->
case (?SETS):is_element({U, S, <<"">>}, WList) of
true -> true;
false ->
case (?SETS):is_element({<<"">>, S, <<"">>}, WList)
of
true -> true;
false -> captcha_required
end
end
end
end;
_ -> true
end.
-spec extract_password(stanza()) -> binary() | false.
extract_password(Packet) ->
case xmpp:get_subtag(Packet, #muc{}) of
#muc{password = Password} when is_binary(Password) ->
Password;
_ ->
false
end.
-spec get_history(binary(), stanza(), state()) -> lqueue().
get_history(Nick, Packet, #state{history = History}) ->
case xmpp:get_subtag(Packet, #muc{}) of
#muc{history = #muc_history{} = MUCHistory} ->
Now = p1_time_compat:timestamp(),
Q = History#lqueue.queue,
{NewQ, Len} = filter_history(Q, MUCHistory, Now, Nick, queue:new(), 0, 0),
History#lqueue{queue = NewQ, len = Len};
_ ->
History
end.
-spec filter_history(?TQUEUE, muc_history(), erlang:timestamp(), binary(),
?TQUEUE, non_neg_integer(), non_neg_integer()) ->
{?TQUEUE, non_neg_integer()}.
filter_history(Queue, #muc_history{since = Since,
seconds = Seconds,
maxstanzas = MaxStanzas,
maxchars = MaxChars} = MUC,
Now, Nick, AccQueue, NumStanzas, NumChars) ->
case queue:out_r(Queue) of
{{value, {_, _, _, TimeStamp, Size} = Elem}, NewQueue} ->
NowDiff = timer:now_diff(Now, TimeStamp) div 1000000,
Chars = Size + byte_size(Nick) + 1,
if (NumStanzas < MaxStanzas) andalso
(TimeStamp > Since) andalso
(NowDiff =< Seconds) andalso
(NumChars + Chars =< MaxChars) ->
filter_history(NewQueue, MUC, Now, Nick,
queue:in_r(Elem, AccQueue),
NumStanzas + 1,
NumChars + Chars);
true ->
{AccQueue, NumStanzas}
end;
{empty, _} ->
{AccQueue, NumStanzas}
end.
-spec is_room_overcrowded(state()) -> boolean().
is_room_overcrowded(StateData) ->
MaxUsersPresence = gen_mod:get_module_opt(StateData#state.server_host,
mod_muc, max_users_presence,
fun(MUP) when is_integer(MUP) -> MUP end,
?DEFAULT_MAX_USERS_PRESENCE),
(?DICT):size(StateData#state.users) > MaxUsersPresence.
-spec presence_broadcast_allowed(jid(), state()) -> boolean().
presence_broadcast_allowed(JID, StateData) ->
Role = get_role(JID, StateData),
lists:member(Role, (StateData#state.config)#config.presence_broadcast).
-spec send_initial_presence(jid(), state(), state()) -> ok.
send_initial_presence(NJID, StateData, OldStateData) ->
send_new_presence1(NJID, <<"">>, true, StateData, OldStateData).
-spec send_update_presence(jid(), state(), state()) -> ok.
send_update_presence(JID, StateData, OldStateData) ->
send_update_presence(JID, <<"">>, StateData, OldStateData).
-spec send_update_presence(jid(), binary(), state(), state()) -> ok.
send_update_presence(JID, Reason, StateData, OldStateData) ->
case is_room_overcrowded(StateData) of
true -> ok;
false -> send_update_presence1(JID, Reason, StateData, OldStateData)
end.
-spec send_update_presence1(jid(), binary(), state(), state()) -> ok.
send_update_presence1(JID, Reason, StateData, OldStateData) ->
LJID = jid:tolower(JID),
LJIDs = case LJID of
{U, S, <<"">>} ->
(?DICT):fold(fun (J, _, Js) ->
case J of
{U, S, _} -> [J | Js];
_ -> Js
end
end,
[], StateData#state.users);
_ ->
case (?DICT):is_key(LJID, StateData#state.users) of
true -> [LJID];
_ -> []
end
end,
lists:foreach(fun (J) ->
send_new_presence1(J, Reason, false, StateData,
OldStateData)
end,
LJIDs).
-spec send_new_presence(jid(), state(), state()) -> ok.
send_new_presence(NJID, StateData, OldStateData) ->
send_new_presence(NJID, <<"">>, false, StateData, OldStateData).
-spec send_new_presence(jid(), binary(), state(), state()) -> ok.
send_new_presence(NJID, Reason, StateData, OldStateData) ->
send_new_presence(NJID, Reason, false, StateData, OldStateData).
-spec send_new_presence(jid(), binary(), boolean(), state(), state()) -> ok.
send_new_presence(NJID, Reason, IsInitialPresence, StateData, OldStateData) ->
case is_room_overcrowded(StateData) of
true -> ok;
false -> send_new_presence1(NJID, Reason, IsInitialPresence, StateData,
OldStateData)
end.
-spec is_ra_changed(jid() | ljid(), boolean(), state(), state()) -> boolean().
is_ra_changed(_, _IsInitialPresence = true, _, _) ->
false;
is_ra_changed(LJID, _IsInitialPresence = false, NewStateData, OldStateData) ->
JID = case LJID of
#jid{} -> LJID;
_ -> jid:make(LJID)
end,
NewRole = get_role(LJID, NewStateData),
NewAff = get_affiliation(JID, NewStateData),
OldRole = get_role(LJID, OldStateData),
OldAff = get_affiliation(JID, OldStateData),
if (NewRole == none) and (NewAff == OldAff) ->
%% A user is leaving the room;
false;
true ->
(NewRole /= OldRole) or (NewAff /= OldAff)
end.
-spec send_new_presence1(jid(), binary(), boolean(), state(), state()) -> ok.
send_new_presence1(NJID, Reason, IsInitialPresence, StateData, OldStateData) ->
LNJID = jid:tolower(NJID),
#user{nick = Nick} = (?DICT):fetch(LNJID, StateData#state.users),
LJID = find_jid_by_nick(Nick, StateData),
{ok,
#user{jid = RealJID, role = Role0,
last_presence = Presence0} = UserInfo} =
(?DICT):find(jid:tolower(LJID),
StateData#state.users),
{Role1, Presence1} =
case presence_broadcast_allowed(NJID, StateData) of
true -> {Role0, Presence0};
false -> {none, #presence{type = unavailable}}
end,
Affiliation = get_affiliation(LJID, StateData),
UserList =
case not (presence_broadcast_allowed(NJID, StateData) orelse
presence_broadcast_allowed(NJID, OldStateData)) of
true ->
[{LNJID, UserInfo}];
false ->
(?DICT):to_list(get_users_and_subscribers(StateData))
end,
lists:foreach(
fun({LUJID, Info}) ->
IsSelfPresence = LNJID == LUJID,
{Role, Presence} = if IsSelfPresence -> {Role0, Presence0};
true -> {Role1, Presence1}
end,
Item0 = #muc_item{affiliation = Affiliation,
role = Role},
Item1 = case Info#user.role == moderator orelse
(StateData#state.config)#config.anonymous
== false orelse IsSelfPresence of
true -> Item0#muc_item{jid = RealJID};
false -> Item0
end,
Item = Item1#muc_item{reason = Reason},
StatusCodes = status_codes(IsInitialPresence, IsSelfPresence,
StateData),
Pres = if Presence == undefined -> #presence{};
true -> Presence
end,
Packet = xmpp:set_subtag(
Pres, #muc_user{items = [Item],
status_codes = StatusCodes}),
Node1 = case is_ra_changed(NJID, IsInitialPresence, StateData, OldStateData) of
true -> ?NS_MUCSUB_NODES_AFFILIATIONS;
false -> ?NS_MUCSUB_NODES_PRESENCE
end,
send_wrapped(jid:replace_resource(StateData#state.jid, Nick),
Info#user.jid, Packet, Node1, StateData),
Type = xmpp:get_type(Packet),
IsSubscriber = is_subscriber(Info#user.jid, StateData),
IsOccupant = Info#user.last_presence /= undefined,
if (IsSubscriber and not IsOccupant) and
(IsInitialPresence or (Type == unavailable)) ->
Node2 = ?NS_MUCSUB_NODES_PARTICIPANTS,
send_wrapped(jid:replace_resource(StateData#state.jid, Nick),
Info#user.jid, Packet, Node2, StateData);
true ->
ok
end
end,
UserList).
-spec send_existing_presences(jid(), state()) -> ok.
send_existing_presences(ToJID, StateData) ->
case is_room_overcrowded(StateData) of
true -> ok;
false -> send_existing_presences1(ToJID, StateData)
end.
-spec send_existing_presences1(jid(), state()) -> ok.
send_existing_presences1(ToJID, StateData) ->
LToJID = jid:tolower(ToJID),
{ok, #user{jid = RealToJID, role = Role}} =
(?DICT):find(LToJID, StateData#state.users),
lists:foreach(
fun({FromNick, _Users}) ->
LJID = find_jid_by_nick(FromNick, StateData),
#user{jid = FromJID, role = FromRole,
last_presence = Presence} =
(?DICT):fetch(jid:tolower(LJID),
StateData#state.users),
PresenceBroadcast =
lists:member(
FromRole, (StateData#state.config)#config.presence_broadcast),
case {RealToJID, PresenceBroadcast} of
{FromJID, _} -> ok;
{_, false} -> ok;
_ ->
FromAffiliation = get_affiliation(LJID, StateData),
Item0 = #muc_item{affiliation = FromAffiliation,
role = FromRole},
Item = case Role == moderator orelse
(StateData#state.config)#config.anonymous
== false of
true -> Item0#muc_item{jid = FromJID};
false -> Item0
end,
Packet = xmpp:set_subtag(
Presence, #muc_user{items = [Item]}),
send_wrapped(jid:replace_resource(StateData#state.jid, FromNick),
RealToJID, Packet, ?NS_MUCSUB_NODES_PRESENCE, StateData)
end
end,
(?DICT):to_list(StateData#state.nicks)).
-spec set_nick(jid(), binary(), state()) -> state().
set_nick(JID, Nick, State) ->
LJID = jid:tolower(JID),
{ok, #user{nick = OldNick}} = (?DICT):find(LJID, State#state.users),
Users = (?DICT):update(LJID,
fun (#user{} = User) -> User#user{nick = Nick} end,
State#state.users),
OldNickUsers = (?DICT):fetch(OldNick, State#state.nicks),
NewNickUsers = case (?DICT):find(Nick, State#state.nicks) of
{ok, U} -> U;
error -> []
end,
Nicks = case OldNickUsers of
[LJID] ->
(?DICT):store(Nick, [LJID | NewNickUsers -- [LJID]],
(?DICT):erase(OldNick, State#state.nicks));
[_ | _] ->
(?DICT):store(Nick, [LJID | NewNickUsers -- [LJID]],
(?DICT):store(OldNick, OldNickUsers -- [LJID],
State#state.nicks))
end,
State#state{users = Users, nicks = Nicks}.
-spec change_nick(jid(), binary(), state()) -> state().
change_nick(JID, Nick, StateData) ->
LJID = jid:tolower(JID),
{ok, #user{nick = OldNick}} = (?DICT):find(LJID, StateData#state.users),
OldNickUsers = (?DICT):fetch(OldNick, StateData#state.nicks),
NewNickUsers = case (?DICT):find(Nick, StateData#state.nicks) of
{ok, U} -> U;
error -> []
end,
SendOldUnavailable = length(OldNickUsers) == 1,
SendNewAvailable = SendOldUnavailable orelse NewNickUsers == [],
NewStateData = set_nick(JID, Nick, StateData),
case presence_broadcast_allowed(JID, NewStateData) of
true ->
send_nick_changing(JID, OldNick, NewStateData,
SendOldUnavailable, SendNewAvailable);
false -> ok
end,
add_to_log(nickchange, {OldNick, Nick}, StateData),
NewStateData.
-spec send_nick_changing(jid(), binary(), state(), boolean(), boolean()) -> ok.
send_nick_changing(JID, OldNick, StateData,
SendOldUnavailable, SendNewAvailable) ->
{ok,
#user{jid = RealJID, nick = Nick, role = Role,
last_presence = Presence}} =
(?DICT):find(jid:tolower(JID),
StateData#state.users),
Affiliation = get_affiliation(JID, StateData),
lists:foreach(
fun({LJID, Info}) when Presence /= undefined ->
IsSelfPresence = LJID == jid:tolower(JID),
Item0 = #muc_item{affiliation = Affiliation, role = Role},
Item = case Info#user.role == moderator orelse
(StateData#state.config)#config.anonymous
== false orelse IsSelfPresence of
true -> Item0#muc_item{jid = RealJID};
false -> Item0
end,
Status110 = case IsSelfPresence of
true -> [110];
false -> []
end,
Packet1 = #presence{
type = unavailable,
sub_els = [#muc_user{
items = [Item#muc_item{nick = Nick}],
status_codes = [303|Status110]}]},
Packet2 = xmpp:set_subtag(Presence,
#muc_user{items = [Item],
status_codes = Status110}),
if SendOldUnavailable ->
send_wrapped(
jid:replace_resource(StateData#state.jid, OldNick),
Info#user.jid, Packet1, ?NS_MUCSUB_NODES_PRESENCE,
StateData);
true -> ok
end,
if SendNewAvailable ->
send_wrapped(
jid:replace_resource(StateData#state.jid, Nick),
Info#user.jid, Packet2, ?NS_MUCSUB_NODES_PRESENCE,
StateData);
true -> ok
end;
(_) ->
ok
end,
?DICT:to_list(get_users_and_subscribers(StateData))).
-spec maybe_send_affiliation(jid(), affiliation(), state()) -> ok.
maybe_send_affiliation(JID, Affiliation, StateData) ->
LJID = jid:tolower(JID),
Users = get_users_and_subscribers(StateData),
IsOccupant = case LJID of
{LUser, LServer, <<"">>} ->
not (?DICT):is_empty(
(?DICT):filter(fun({U, S, _}, _) ->
U == LUser andalso
S == LServer
end, Users));
{_LUser, _LServer, _LResource} ->
(?DICT):is_key(LJID, Users)
end,
case IsOccupant of
true ->
ok; % The new affiliation is published via presence.
false ->
send_affiliation(JID, Affiliation, StateData)
end.
-spec send_affiliation(jid(), affiliation(), state()) -> ok.
send_affiliation(JID, Affiliation, StateData) ->
Item = #muc_item{jid = JID,
affiliation = Affiliation,
role = none},
Message = #message{id = randoms:get_string(),
sub_els = [#muc_user{items = [Item]}]},
Users = get_users_and_subscribers(StateData),
Recipients = case (StateData#state.config)#config.anonymous of
true ->
(?DICT):filter(fun(_, #user{role = moderator}) ->
true;
(_, _) ->
false
end, Users);
false ->
Users
end,
send_wrapped_multiple(StateData#state.jid, Recipients, Message,
?NS_MUCSUB_NODES_AFFILIATIONS, StateData).
-spec status_codes(boolean(), boolean(), state()) -> [pos_integer()].
status_codes(IsInitialPresence, _IsSelfPresence = true, StateData) ->
S0 = [110],
case IsInitialPresence of
true ->
S1 = case StateData#state.just_created of
true -> [201|S0];
false -> S0
end,
S2 = case (StateData#state.config)#config.anonymous of
true -> S1;
false -> [100|S1]
end,
S3 = case (StateData#state.config)#config.logging of
true -> [170|S2];
false -> S2
end,
S3;
false -> S0
end;
status_codes(_IsInitialPresence, _IsSelfPresence = false, _StateData) -> [].
-spec lqueue_new(non_neg_integer()) -> lqueue().
lqueue_new(Max) ->
#lqueue{queue = queue:new(), len = 0, max = Max}.
-spec lqueue_in(term(), lqueue()) -> lqueue().
%% If the message queue limit is set to 0, do not store messages.
lqueue_in(_Item, LQ = #lqueue{max = 0}) -> LQ;
%% Otherwise, rotate messages in the queue store.
lqueue_in(Item,
#lqueue{queue = Q1, len = Len, max = Max}) ->
Q2 = queue:in(Item, Q1),
if Len >= Max ->
Q3 = lqueue_cut(Q2, Len - Max + 1),
#lqueue{queue = Q3, len = Max, max = Max};
true -> #lqueue{queue = Q2, len = Len + 1, max = Max}
end.
-spec lqueue_cut(queue:queue(), non_neg_integer()) -> queue:queue().
lqueue_cut(Q, 0) -> Q;
lqueue_cut(Q, N) ->
{_, Q1} = queue:out(Q), lqueue_cut(Q1, N - 1).
-spec lqueue_to_list(lqueue()) -> list().
lqueue_to_list(#lqueue{queue = Q1}) ->
queue:to_list(Q1).
-spec add_message_to_history(binary(), jid(), message(), state()) -> state().
add_message_to_history(FromNick, FromJID, Packet, StateData) ->
add_to_log(text, {FromNick, Packet}, StateData),
case check_subject(Packet) of
false ->
TimeStamp = p1_time_compat:timestamp(),
AddrPacket = case (StateData#state.config)#config.anonymous of
true -> Packet;
false ->
Addresses = #addresses{
list = [#address{type = ofrom,
jid = FromJID}]},
xmpp:set_subtag(Packet, Addresses)
end,
TSPacket = xmpp_util:add_delay_info(
AddrPacket, StateData#state.jid, TimeStamp),
SPacket = xmpp:set_from_to(
TSPacket,
jid:replace_resource(StateData#state.jid, FromNick),
StateData#state.jid),
Size = element_size(SPacket),
Q1 = lqueue_in({FromNick, TSPacket, false,
TimeStamp, Size},
StateData#state.history),
StateData#state{history = Q1};
_ ->
StateData
end.
-spec send_history(jid(), lqueue(), state()) -> boolean().
send_history(JID, History, StateData) ->
lists:foreach(
fun({Nick, Packet, _HaveSubject, _TimeStamp, _Size}) ->
ejabberd_router:route(
jid:replace_resource(StateData#state.jid, Nick),
JID, Packet)
end, lqueue_to_list(History)).
-spec send_subject(jid(), state()) -> ok.
send_subject(JID, #state{subject_author = Nick} = StateData) ->
Subject = case StateData#state.subject of
<<"">> -> [#text{}];
Subj -> xmpp:mk_text(Subj)
end,
Packet = #message{type = groupchat, subject = Subject},
ejabberd_router:route(jid:replace_resource(StateData#state.jid, Nick), JID,
Packet).
-spec check_subject(message()) -> false | binary().
check_subject(#message{subject = [_|_] = Subj, body = [],
thread = undefined}) ->
xmpp:get_text(Subj);
check_subject(_) ->
false.
-spec can_change_subject(role(), boolean(), state()) -> boolean().
can_change_subject(Role, IsSubscriber, StateData) ->
case (StateData#state.config)#config.allow_change_subj
of
true -> Role == moderator orelse Role == participant orelse IsSubscriber == true;
_ -> Role == moderator
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Admin stuff
-spec process_iq_admin(jid(), iq(), #state{}) -> {error, stanza_error()} |
{result, undefined, #state{}} |
{result, muc_admin()}.
process_iq_admin(_From, #iq{lang = Lang, sub_els = [#muc_admin{items = []}]},
_StateData) ->
Txt = <<"No 'item' element found">>,
{error, xmpp:err_bad_request(Txt, Lang)};
process_iq_admin(From, #iq{type = set, lang = Lang,
sub_els = [#muc_admin{items = Items}]},
StateData) ->
process_admin_items_set(From, Items, Lang, StateData);
process_iq_admin(From, #iq{type = get, lang = Lang,
sub_els = [#muc_admin{items = [Item]}]},
StateData) ->
FAffiliation = get_affiliation(From, StateData),
FRole = get_role(From, StateData),
case Item of
#muc_item{role = undefined, affiliation = undefined} ->
Txt = <<"Neither 'role' nor 'affiliation' attribute found">>,
{error, xmpp:err_bad_request(Txt, Lang)};
#muc_item{role = undefined, affiliation = Affiliation} ->
if (FAffiliation == owner) or
(FAffiliation == admin) or
((FAffiliation == member) and
not (StateData#state.config)#config.anonymous) ->
Items = items_with_affiliation(Affiliation, StateData),
{result, #muc_admin{items = Items}};
true ->
ErrText = <<"Administrator privileges required">>,
{error, xmpp:err_forbidden(ErrText, Lang)}
end;
#muc_item{role = Role} ->
if FRole == moderator ->
Items = items_with_role(Role, StateData),
{result, #muc_admin{items = Items}};
true ->
ErrText = <<"Moderator privileges required">>,
{error, xmpp:err_forbidden(ErrText, Lang)}
end
end;
process_iq_admin(_From, #iq{type = get, lang = Lang}, _StateData) ->
ErrText = <<"Too many <item/> elements">>,
{error, xmpp:err_bad_request(ErrText, Lang)}.
-spec items_with_role(role(), state()) -> [muc_item()].
items_with_role(SRole, StateData) ->
lists:map(fun ({_, U}) -> user_to_item(U, StateData)
end,
search_role(SRole, StateData)).
-spec items_with_affiliation(affiliation(), state()) -> [muc_item()].
items_with_affiliation(SAffiliation, StateData) ->
lists:map(
fun({JID, {Affiliation, Reason}}) ->
#muc_item{affiliation = Affiliation, jid = jid:make(JID),
reason = Reason};
({JID, Affiliation}) ->
#muc_item{affiliation = Affiliation, jid = jid:make(JID)}
end,
search_affiliation(SAffiliation, StateData)).
-spec user_to_item(#user{}, state()) -> muc_item().
user_to_item(#user{role = Role, nick = Nick, jid = JID},
StateData) ->
Affiliation = get_affiliation(JID, StateData),
#muc_item{role = Role,
affiliation = Affiliation,
nick = Nick,
jid = JID}.
-spec search_role(role(), state()) -> [{ljid(), #user{}}].
search_role(Role, StateData) ->
lists:filter(fun ({_, #user{role = R}}) -> Role == R
end,
(?DICT):to_list(StateData#state.users)).
-spec search_affiliation(affiliation(), state()) ->
[{ljid(),
affiliation() | {affiliation(), binary()}}].
search_affiliation(Affiliation, StateData) ->
lists:filter(fun ({_, A}) ->
case A of
{A1, _Reason} -> Affiliation == A1;
_ -> Affiliation == A
end
end,
(?DICT):to_list(StateData#state.affiliations)).
-spec process_admin_items_set(jid(), [muc_item()], binary(),
#state{}) -> {result, undefined, #state{}} |
{error, stanza_error()}.
process_admin_items_set(UJID, Items, Lang, StateData) ->
UAffiliation = get_affiliation(UJID, StateData),
URole = get_role(UJID, StateData),
case catch find_changed_items(UJID, UAffiliation, URole,
Items, Lang, StateData, [])
of
{result, Res} ->
?INFO_MSG("Processing MUC admin query from ~s in "
"room ~s:~n ~p",
[jid:to_string(UJID),
jid:to_string(StateData#state.jid), Res]),
case lists:foldl(process_item_change(UJID),
StateData, lists:flatten(Res)) of
{error, _} = Err ->
Err;
NSD ->
store_room(NSD),
{result, undefined, NSD}
end;
{error, Err} -> {error, Err}
end.
-spec process_item_change(jid()) -> function().
process_item_change(UJID) ->
fun(_, {error, _} = Err) ->
Err;
(Item, SD) ->
process_item_change(Item, SD, UJID)
end.
-type admin_action() :: {jid(), affiliation | role,
affiliation() | role(), binary()}.
-spec process_item_change(admin_action(), state(), jid()) -> state() | {error, stanza_error()}.
process_item_change(Item, SD, UJID) ->
try case Item of
{JID, affiliation, owner, _} when JID#jid.luser == <<"">> ->
%% If the provided JID does not have username,
%% forget the affiliation completely
SD;
{JID, role, none, Reason} ->
send_kickban_presence(UJID, JID, Reason, 307, SD),
set_role(JID, none, SD);
{JID, affiliation, none, Reason} ->
case (SD#state.config)#config.members_only of
true ->
send_kickban_presence(UJID, JID, Reason, 321, none, SD),
maybe_send_affiliation(JID, none, SD),
SD1 = set_affiliation(JID, none, SD),
set_role(JID, none, SD1);
_ ->
SD1 = set_affiliation(JID, none, SD),
send_update_presence(JID, Reason, SD1, SD),
maybe_send_affiliation(JID, none, SD1),
SD1
end;
{JID, affiliation, outcast, Reason} ->
send_kickban_presence(UJID, JID, Reason, 301, outcast, SD),
maybe_send_affiliation(JID, outcast, SD),
set_affiliation(JID, outcast, set_role(JID, none, SD), Reason);
{JID, affiliation, A, Reason} when (A == admin) or (A == owner) ->
SD1 = set_affiliation(JID, A, SD, Reason),
SD2 = set_role(JID, moderator, SD1),
send_update_presence(JID, Reason, SD2, SD),
maybe_send_affiliation(JID, A, SD2),
SD2;
{JID, affiliation, member, Reason} ->
SD1 = set_affiliation(JID, member, SD, Reason),
SD2 = set_role(JID, participant, SD1),
send_update_presence(JID, Reason, SD2, SD),
maybe_send_affiliation(JID, member, SD2),
SD2;
{JID, role, Role, Reason} ->
SD1 = set_role(JID, Role, SD),
send_new_presence(JID, Reason, SD1, SD),
SD1;
{JID, affiliation, A, _Reason} ->
SD1 = set_affiliation(JID, A, SD),
send_update_presence(JID, SD1, SD),
maybe_send_affiliation(JID, A, SD1),
SD1
end
catch E:R ->
?ERROR_MSG("failed to set item ~p from ~s: ~p",
[Item, jid:to_string(UJID),
{E, {R, erlang:get_stacktrace()}}]),
{error, xmpp:err_internal_server_error()}
end.
-spec find_changed_items(jid(), affiliation(), role(),
[muc_item()], binary(), state(), [admin_action()]) ->
{result, [admin_action()]}.
find_changed_items(_UJID, _UAffiliation, _URole, [],
_Lang, _StateData, Res) ->
{result, Res};
find_changed_items(_UJID, _UAffiliation, _URole,
[#muc_item{jid = undefined, nick = undefined}|_],
Lang, _StateData, _Res) ->
Txt = <<"Neither 'jid' nor 'nick' attribute found">>,
throw({error, xmpp:err_bad_request(Txt, Lang)});
find_changed_items(_UJID, _UAffiliation, _URole,
[#muc_item{role = undefined, affiliation = undefined}|_],
Lang, _StateData, _Res) ->
Txt = <<"Neither 'role' nor 'affiliation' attribute found">>,
throw({error, xmpp:err_bad_request(Txt, Lang)});
find_changed_items(UJID, UAffiliation, URole,
[#muc_item{jid = J, nick = Nick, reason = Reason,
role = Role, affiliation = Affiliation}|Items],
Lang, StateData, Res) ->
[JID | _] = JIDs =
if J /= undefined ->
[J];
Nick /= <<"">> ->
case find_jids_by_nick(Nick, StateData) of
[] ->
ErrText = str:format(
translate:translate(
Lang,
<<"Nickname ~s does not exist in the room">>),
[Nick]),
throw({error, xmpp:err_not_acceptable(ErrText, Lang)});
JIDList ->
JIDList
end
end,
{RoleOrAff, RoleOrAffValue} = if Role == undefined ->
{affiliation, Affiliation};
true ->
{role, Role}
end,
TAffiliation = get_affiliation(JID, StateData),
TRole = get_role(JID, StateData),
ServiceAf = get_service_affiliation(JID, StateData),
CanChangeRA = case can_change_ra(UAffiliation,
URole,
TAffiliation,
TRole, RoleOrAff, RoleOrAffValue,
ServiceAf) of
nothing -> nothing;
true -> true;
check_owner ->
case search_affiliation(owner, StateData) of
[{OJID, _}] ->
jid:remove_resource(OJID)
/=
jid:tolower(jid:remove_resource(UJID));
_ -> true
end;
_ -> false
end,
case CanChangeRA of
nothing ->
find_changed_items(UJID, UAffiliation, URole,
Items, Lang, StateData,
Res);
true ->
MoreRes = case RoleOrAff of
affiliation ->
[{jid:remove_resource(Jidx),
RoleOrAff, RoleOrAffValue, Reason}
|| Jidx <- JIDs];
role ->
[{Jidx, RoleOrAff, RoleOrAffValue, Reason}
|| Jidx <- JIDs]
end,
find_changed_items(UJID, UAffiliation, URole,
Items, Lang, StateData,
[MoreRes | Res]);
false ->
Txt = <<"Changing role/affiliation is not allowed">>,
throw({error, xmpp:err_not_allowed(Txt, Lang)})
end.
-spec can_change_ra(affiliation(), role(), affiliation(), role(),
affiliation, affiliation(), affiliation()) -> boolean();
(affiliation(), role(), affiliation(), role(),
role, role(), affiliation()) -> boolean().
can_change_ra(_FAffiliation, _FRole, owner, _TRole,
affiliation, owner, owner) ->
%% A room owner tries to add as persistent owner a
%% participant that is already owner because he is MUC admin
true;
can_change_ra(_FAffiliation, _FRole, _TAffiliation,
_TRole, _RoleorAffiliation, _Value, owner) ->
%% Nobody can decrease MUC admin's role/affiliation
false;
can_change_ra(_FAffiliation, _FRole, TAffiliation,
_TRole, affiliation, Value, _ServiceAf)
when TAffiliation == Value ->
nothing;
can_change_ra(_FAffiliation, _FRole, _TAffiliation,
TRole, role, Value, _ServiceAf)
when TRole == Value ->
nothing;
can_change_ra(FAffiliation, _FRole, outcast, _TRole,
affiliation, none, _ServiceAf)
when (FAffiliation == owner) or
(FAffiliation == admin) ->
true;
can_change_ra(FAffiliation, _FRole, outcast, _TRole,
affiliation, member, _ServiceAf)
when (FAffiliation == owner) or
(FAffiliation == admin) ->
true;
can_change_ra(owner, _FRole, outcast, _TRole,
affiliation, admin, _ServiceAf) ->
true;
can_change_ra(owner, _FRole, outcast, _TRole,
affiliation, owner, _ServiceAf) ->
true;
can_change_ra(FAffiliation, _FRole, none, _TRole,
affiliation, outcast, _ServiceAf)
when (FAffiliation == owner) or
(FAffiliation == admin) ->
true;
can_change_ra(FAffiliation, _FRole, none, _TRole,
affiliation, member, _ServiceAf)
when (FAffiliation == owner) or
(FAffiliation == admin) ->
true;
can_change_ra(owner, _FRole, none, _TRole, affiliation,
admin, _ServiceAf) ->
true;
can_change_ra(owner, _FRole, none, _TRole, affiliation,
owner, _ServiceAf) ->
true;
can_change_ra(FAffiliation, _FRole, member, _TRole,
affiliation, outcast, _ServiceAf)
when (FAffiliation == owner) or
(FAffiliation == admin) ->
true;
can_change_ra(FAffiliation, _FRole, member, _TRole,
affiliation, none, _ServiceAf)
when (FAffiliation == owner) or
(FAffiliation == admin) ->
true;
can_change_ra(owner, _FRole, member, _TRole,
affiliation, admin, _ServiceAf) ->
true;
can_change_ra(owner, _FRole, member, _TRole,
affiliation, owner, _ServiceAf) ->
true;
can_change_ra(owner, _FRole, admin, _TRole, affiliation,
_Affiliation, _ServiceAf) ->
true;
can_change_ra(owner, _FRole, owner, _TRole, affiliation,
_Affiliation, _ServiceAf) ->
check_owner;
can_change_ra(_FAffiliation, _FRole, _TAffiliation,
_TRole, affiliation, _Value, _ServiceAf) ->
false;
can_change_ra(_FAffiliation, moderator, _TAffiliation,
visitor, role, none, _ServiceAf) ->
true;
can_change_ra(_FAffiliation, moderator, _TAffiliation,
visitor, role, participant, _ServiceAf) ->
true;
can_change_ra(FAffiliation, _FRole, _TAffiliation,
visitor, role, moderator, _ServiceAf)
when (FAffiliation == owner) or
(FAffiliation == admin) ->
true;
can_change_ra(_FAffiliation, moderator, _TAffiliation,
participant, role, none, _ServiceAf) ->
true;
can_change_ra(_FAffiliation, moderator, _TAffiliation,
participant, role, visitor, _ServiceAf) ->
true;
can_change_ra(FAffiliation, _FRole, _TAffiliation,
participant, role, moderator, _ServiceAf)
when (FAffiliation == owner) or
(FAffiliation == admin) ->
true;
can_change_ra(_FAffiliation, _FRole, owner, moderator,
role, visitor, _ServiceAf) ->
false;
can_change_ra(owner, _FRole, _TAffiliation, moderator,
role, visitor, _ServiceAf) ->
true;
can_change_ra(_FAffiliation, _FRole, admin, moderator,
role, visitor, _ServiceAf) ->
false;
can_change_ra(admin, _FRole, _TAffiliation, moderator,
role, visitor, _ServiceAf) ->
true;
can_change_ra(_FAffiliation, _FRole, owner, moderator,
role, participant, _ServiceAf) ->
false;
can_change_ra(owner, _FRole, _TAffiliation, moderator,
role, participant, _ServiceAf) ->
true;
can_change_ra(_FAffiliation, _FRole, admin, moderator,
role, participant, _ServiceAf) ->
false;
can_change_ra(admin, _FRole, _TAffiliation, moderator,
role, participant, _ServiceAf) ->
true;
can_change_ra(_FAffiliation, _FRole, _TAffiliation,
_TRole, role, _Value, _ServiceAf) ->
false.
-spec send_kickban_presence(jid(), jid(), binary(),
pos_integer(), state()) -> ok.
send_kickban_presence(UJID, JID, Reason, Code, StateData) ->
NewAffiliation = get_affiliation(JID, StateData),
send_kickban_presence(UJID, JID, Reason, Code, NewAffiliation,
StateData).
-spec send_kickban_presence(jid(), jid(), binary(), pos_integer(),
affiliation(), state()) -> ok.
send_kickban_presence(UJID, JID, Reason, Code, NewAffiliation,
StateData) ->
LJID = jid:tolower(JID),
LJIDs = case LJID of
{U, S, <<"">>} ->
(?DICT):fold(fun (J, _, Js) ->
case J of
{U, S, _} -> [J | Js];
_ -> Js
end
end,
[], StateData#state.users);
_ ->
case (?DICT):is_key(LJID, StateData#state.users) of
true -> [LJID];
_ -> []
end
end,
lists:foreach(fun (J) ->
{ok, #user{nick = Nick}} = (?DICT):find(J,
StateData#state.users),
add_to_log(kickban, {Nick, Reason, Code}, StateData),
tab_remove_online_user(J, StateData),
send_kickban_presence1(UJID, J, Reason, Code,
NewAffiliation, StateData)
end,
LJIDs).
-spec send_kickban_presence1(jid(), jid(), binary(), pos_integer(),
affiliation(), state()) -> ok.
send_kickban_presence1(MJID, UJID, Reason, Code, Affiliation,
StateData) ->
{ok, #user{jid = RealJID, nick = Nick}} =
(?DICT):find(jid:tolower(UJID),
StateData#state.users),
ActorNick = get_actor_nick(MJID, StateData),
lists:foreach(
fun({LJID, Info}) ->
IsSelfPresence = jid:tolower(UJID) == LJID,
Item0 = #muc_item{affiliation = Affiliation,
role = none},
Item1 = case Info#user.role == moderator orelse
(StateData#state.config)#config.anonymous
== false orelse IsSelfPresence of
true -> Item0#muc_item{jid = RealJID};
false -> Item0
end,
Item2 = Item1#muc_item{reason = Reason},
Item = case ActorNick of
<<"">> -> Item2;
_ -> Item2#muc_item{actor = #muc_actor{nick = ActorNick}}
end,
Codes = if IsSelfPresence -> [110, Code];
true -> [Code]
end,
Packet = #presence{type = unavailable,
sub_els = [#muc_user{items = [Item],
status_codes = Codes}]},
RoomJIDNick = jid:replace_resource(StateData#state.jid, Nick),
send_wrapped(RoomJIDNick, Info#user.jid, Packet,
?NS_MUCSUB_NODES_AFFILIATIONS, StateData),
IsSubscriber = is_subscriber(Info#user.jid, StateData),
IsOccupant = Info#user.last_presence /= undefined,
if (IsSubscriber and not IsOccupant) ->
send_wrapped(RoomJIDNick, Info#user.jid, Packet,
?NS_MUCSUB_NODES_PARTICIPANTS, StateData);
true ->
ok
end
end,
(?DICT):to_list(get_users_and_subscribers(StateData))).
-spec get_actor_nick(binary() | jid(), state()) -> binary().
get_actor_nick(<<"">>, _StateData) ->
<<"">>;
get_actor_nick(MJID, StateData) ->
case (?DICT):find(jid:tolower(MJID), StateData#state.users) of
{ok, #user{nick = ActorNick}} -> ActorNick;
_ -> <<"">>
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Owner stuff
-spec process_iq_owner(jid(), iq(), state()) ->
{result, undefined | muc_owner()} |
{result, undefined | muc_owner(), state() | stop} |
{error, stanza_error()}.
process_iq_owner(From, #iq{type = set, lang = Lang,
sub_els = [#muc_owner{destroy = Destroy,
config = Config,
items = Items}]},
StateData) ->
FAffiliation = get_affiliation(From, StateData),
if FAffiliation /= owner ->
ErrText = <<"Owner privileges required">>,
{error, xmpp:err_forbidden(ErrText, Lang)};
Destroy /= undefined, Config == undefined, Items == [] ->
?INFO_MSG("Destroyed MUC room ~s by the owner ~s",
[jid:to_string(StateData#state.jid), jid:to_string(From)]),
add_to_log(room_existence, destroyed, StateData),
destroy_room(Destroy, StateData);
Config /= undefined, Destroy == undefined, Items == [] ->
case Config of
#xdata{type = cancel} ->
{result, undefined};
#xdata{type = submit, fields = Fs} ->
try muc_roomconfig:decode(Fs) of
Options ->
case is_allowed_log_change(Options, StateData, From) andalso
is_allowed_persistent_change(Options, StateData, From) andalso
is_allowed_room_name_desc_limits(Options, StateData) andalso
is_password_settings_correct(Options, StateData) of
true ->
set_config(Options, StateData, Lang);
false ->
{error, xmpp:err_not_acceptable()}
end
catch _:{muc_roomconfig, Why} ->
Txt = muc_roomconfig:format_error(Why),
{error, xmpp:err_bad_request(Txt, Lang)}
end;
_ ->
Txt = <<"Incorrect data form">>,
{error, xmpp:err_bad_request(Txt, Lang)}
end;
Items /= [], Config == undefined, Destroy == undefined ->
process_admin_items_set(From, Items, Lang, StateData);
true ->
{error, xmpp:err_bad_request()}
end;
process_iq_owner(From, #iq{type = get, lang = Lang,
sub_els = [#muc_owner{destroy = Destroy,
config = Config,
items = Items}]},
StateData) ->
FAffiliation = get_affiliation(From, StateData),
if FAffiliation /= owner ->
ErrText = <<"Owner privileges required">>,
{error, xmpp:err_forbidden(ErrText, Lang)};
Destroy == undefined, Config == undefined ->
case Items of
[] ->
{result,
#muc_owner{config = get_config(Lang, StateData, From)}};
[#muc_item{affiliation = undefined}] ->
Txt = <<"No 'affiliation' attribute found">>,
{error, xmpp:err_bad_request(Txt, Lang)};
[#muc_item{affiliation = Affiliation}] ->
Items = items_with_affiliation(Affiliation, StateData),
{result, #muc_owner{items = Items}};
[_|_] ->
Txt = <<"Too many <item/> elements">>,
{error, xmpp:err_bad_request(Txt, Lang)}
end;
true ->
{error, xmpp:err_bad_request()}
end.
-spec is_allowed_log_change(muc_roomconfig:result(), state(), jid()) -> boolean().
is_allowed_log_change(Options, StateData, From) ->
case proplists:is_defined(enablelogging, Options) of
false -> true;
true ->
allow ==
mod_muc_log:check_access_log(StateData#state.server_host,
From)
end.
-spec is_allowed_persistent_change(muc_roomconfig:result(), state(), jid()) -> boolean().
is_allowed_persistent_change(Options, StateData, From) ->
case proplists:is_defined(persistentroom, Options) of
false -> true;
true ->
{_AccessRoute, _AccessCreate, _AccessAdmin,
AccessPersistent} =
StateData#state.access,
allow ==
acl:match_rule(StateData#state.server_host,
AccessPersistent, From)
end.
%% Check if the Room Name and Room Description defined in the Data Form
%% are conformant to the configured limits
-spec is_allowed_room_name_desc_limits(muc_roomconfig:result(), state()) -> boolean().
is_allowed_room_name_desc_limits(Options, StateData) ->
RoomName = proplists:get_value(roomname, Options, <<"">>),
RoomDesc = proplists:get_value(roomdesc, Options, <<"">>),
MaxRoomName = gen_mod:get_module_opt(
StateData#state.server_host,
mod_muc, max_room_name,
fun(infinity) -> infinity;
(I) when is_integer(I),
I>0 -> I
end, infinity),
MaxRoomDesc = gen_mod:get_module_opt(
StateData#state.server_host,
mod_muc, max_room_desc,
fun(infinity) -> infinity;
(I) when is_integer(I),
I>0 ->
I
end, infinity),
(byte_size(RoomName) =< MaxRoomName)
andalso (byte_size(RoomDesc) =< MaxRoomDesc).
%% Return false if:
%% "the password for a password-protected room is blank"
-spec is_password_settings_correct(muc_roomconfig:result(), state()) -> boolean().
is_password_settings_correct(Options, StateData) ->
Config = StateData#state.config,
OldProtected = Config#config.password_protected,
OldPassword = Config#config.password,
NewProtected = proplists:get_value(passwordprotectedroom, Options),
NewPassword = proplists:get_value(roomsecret, Options),
case {OldProtected, NewProtected, OldPassword, NewPassword} of
{true, undefined, <<"">>, undefined} -> false;
{true, undefined, _, <<"">>} -> false;
{_, true, <<"">>, undefined} -> false;
{_, true, _, <<"">>} -> false;
_ -> true
end.
-spec get_default_room_maxusers(state()) -> non_neg_integer().
get_default_room_maxusers(RoomState) ->
DefRoomOpts =
gen_mod:get_module_opt(RoomState#state.server_host,
mod_muc, default_room_options,
fun(L) when is_list(L) -> L end,
[]),
RoomState2 = set_opts(DefRoomOpts, RoomState),
(RoomState2#state.config)#config.max_users.
-spec get_config(binary(), state(), jid()) -> xdata().
get_config(Lang, StateData, From) ->
{_AccessRoute, _AccessCreate, _AccessAdmin, AccessPersistent} =
StateData#state.access,
ServiceMaxUsers = get_service_max_users(StateData),
DefaultRoomMaxUsers = get_default_room_maxusers(StateData),
Config = StateData#state.config,
{MaxUsersRoomInteger, MaxUsersRoomString} =
case get_max_users(StateData) of
N when is_integer(N) ->
{N, N};
_ -> {0, none}
end,
Title = str:format(
translate:translate(Lang, <<"Configuration of room ~s">>),
[jid:to_string(StateData#state.jid)]),
Fs = [{roomname, Config#config.title},
{roomdesc, Config#config.description}] ++
case acl:match_rule(StateData#state.server_host, AccessPersistent, From) of
allow -> [{persistentroom, Config#config.persistent}];
deny -> []
end ++
[{publicroom, Config#config.public},
{public_list, Config#config.public_list},
{passwordprotectedroom, Config#config.password_protected},
{roomsecret, case Config#config.password_protected of
true -> Config#config.password;
false -> <<"">>
end},
{maxusers, MaxUsersRoomString,
[if is_integer(ServiceMaxUsers) -> [];
true -> [{<<"No limit">>, <<"none">>}]
end] ++ [{integer_to_binary(N), N}
|| N <- lists:usort([ServiceMaxUsers,
DefaultRoomMaxUsers,
MaxUsersRoomInteger
| ?MAX_USERS_DEFAULT_LIST]),
N =< ServiceMaxUsers]},
{whois, if Config#config.anonymous -> moderators;
true -> anyone
end},
{presencebroadcast, Config#config.presence_broadcast},
{membersonly, Config#config.members_only},
{moderatedroom, Config#config.moderated},
{members_by_default, Config#config.members_by_default},
{changesubject, Config#config.allow_change_subj},
{allow_private_messages, Config#config.allow_private_messages},
{allow_private_messages_from_visitors,
Config#config.allow_private_messages_from_visitors},
{allow_query_users, Config#config.allow_query_users},
{allowinvites, Config#config.allow_user_invites},
{allow_visitor_status, Config#config.allow_visitor_status},
{allow_visitor_nickchange, Config#config.allow_visitor_nickchange},
{allow_voice_requests, Config#config.allow_voice_requests},
{allow_subscription, Config#config.allow_subscription},
{voice_request_min_interval, Config#config.voice_request_min_interval}]
++
case ejabberd_captcha:is_feature_available() of
true -> [{captcha_protected, Config#config.captcha_protected}];
false -> []
end ++
[{captcha_whitelist,
lists:map(fun jid:make/1, ?SETS:to_list(Config#config.captcha_whitelist))}]
++
case mod_muc_log:check_access_log(StateData#state.server_host, From) of
allow -> [{enablelogging, Config#config.logging}];
deny -> []
end,
Fields = ejabberd_hooks:run_fold(get_room_config,
StateData#state.server_host,
Fs,
[StateData, From, Lang]),
#xdata{type = form, title = Title,
fields = muc_roomconfig:encode(
Fields, fun(T) -> translate:translate(Lang, T) end)}.
-spec set_config(muc_roomconfig:result(), state(), binary()) ->
{error, stanza_error()} | {result, undefined, state()}.
set_config(Options, StateData, Lang) ->
try
#config{} = Config = set_config(Options, StateData#state.config,
StateData#state.server_host, Lang),
{result, _, NSD} = Res = change_config(Config, StateData),
Type = case {(StateData#state.config)#config.logging,
Config#config.logging}
of
{true, false} -> roomconfig_change_disabledlogging;
{false, true} -> roomconfig_change_enabledlogging;
{_, _} -> roomconfig_change
end,
Users = [{U#user.jid, U#user.nick, U#user.role}
|| {_, U} <- (?DICT):to_list(StateData#state.users)],
add_to_log(Type, Users, NSD),
Res
catch _:{badmatch, {error, #stanza_error{}} = Err} ->
Err
end.
get_config_opt_name(Pos) ->
Fs = [config|record_info(fields, config)],
lists:nth(Pos, Fs).
-spec set_config([muc_roomconfig:property()], #config{},
binary(), binary()) -> #config{} | {error, stanza_error()}.
set_config(Opts, Config, ServerHost, Lang) ->
lists:foldl(
fun(_, {error, _} = Err) -> Err;
({roomname, Title}, C) -> C#config{title = Title};
({roomdesc, Desc}, C) -> C#config{description = Desc};
({changesubject, V}, C) -> C#config{allow_change_subj = V};
({allow_query_users, V}, C) -> C#config{allow_query_users = V};
({allow_private_messages, V}, C) ->
C#config{allow_private_messages = V};
({allow_private_messages_from_visitors, V}, C) ->
C#config{allow_private_messages_from_visitors = V};
({allow_visitor_status, V}, C) -> C#config{allow_visitor_status = V};
({allow_visitor_nickchange, V}, C) ->
C#config{allow_visitor_nickchange = V};
({publicroom, V}, C) -> C#config{public = V};
({public_list, V}, C) -> C#config{public_list = V};
({persistentroom, V}, C) -> C#config{persistent = V};
({moderatedroom, V}, C) -> C#config{moderated = V};
({members_by_default, V}, C) -> C#config{members_by_default = V};
({membersonly, V}, C) -> C#config{members_only = V};
({captcha_protected, V}, C) -> C#config{captcha_protected = V};
({allowinvites, V}, C) -> C#config{allow_user_invites = V};
({allow_subscription, V}, C) -> C#config{allow_subscription = V};
({passwordprotectedroom, V}, C) -> C#config{password_protected = V};
({roomsecret, V}, C) -> C#config{password = V};
({anonymous, V}, C) -> C#config{anonymous = V};
({presencebroadcast, V}, C) -> C#config{presence_broadcast = V};
({allow_voice_requests, V}, C) -> C#config{allow_voice_requests = V};
({voice_request_min_interval, V}, C) ->
C#config{voice_request_min_interval = V};
({whois, moderators}, C) -> C#config{anonymous = true};
({whois, anyone}, C) -> C#config{anonymous = false};
({maxusers, V}, C) -> C#config{max_users = V};
({enablelogging, V}, C) -> C#config{logging = V};
({captcha_whitelist, Js}, C) ->
LJIDs = [jid:tolower(J) || J <- Js],
C#config{captcha_whitelist = ?SETS:from_list(LJIDs)};
({O, V} = Opt, C) ->
case ejabberd_hooks:run_fold(set_room_option,
ServerHost,
{0, undefined},
[Opt, Lang]) of
{0, undefined} ->
?ERROR_MSG("set_room_option hook failed for "
"option '~s' with value ~p", [O, V]),
Txt = <<"Failed to process option '", O/binary, "'">>,
{error, xmpp:err_internal_server_error(Txt, Lang)};
{Pos, Val} ->
setelement(Pos, C, Val)
end
end, Config, Opts).
-spec change_config(#config{}, state()) -> {result, undefined, state()}.
change_config(Config, StateData) ->
send_config_change_info(Config, StateData),
NSD = remove_subscriptions(StateData#state{config = Config}),
case {(StateData#state.config)#config.persistent,
Config#config.persistent}
of
{_, true} ->
mod_muc:store_room(NSD#state.server_host,
NSD#state.host, NSD#state.room, make_opts(NSD));
{true, false} ->
mod_muc:forget_room(NSD#state.server_host,
NSD#state.host, NSD#state.room);
{false, false} -> ok
end,
case {(StateData#state.config)#config.members_only,
Config#config.members_only}
of
{false, true} ->
NSD1 = remove_nonmembers(NSD), {result, undefined, NSD1};
_ -> {result, undefined, NSD}
end.
-spec send_config_change_info(#config{}, state()) -> ok.
send_config_change_info(Config, #state{config = Config}) -> ok;
send_config_change_info(New, #state{config = Old} = StateData) ->
Codes = case {Old#config.logging, New#config.logging} of
{false, true} -> [170];
{true, false} -> [171];
_ -> []
end
++
case {Old#config.anonymous, New#config.anonymous} of
{true, false} -> [172];
{false, true} -> [173];
_ -> []
end
++
case Old#config{anonymous = New#config.anonymous,
vcard = New#config.vcard,
logging = New#config.logging} of
New -> [];
_ -> [104]
end,
if Codes /= [] ->
Message = #message{type = groupchat,
id = randoms:get_string(),
sub_els = [#muc_user{status_codes = Codes}]},
send_wrapped_multiple(StateData#state.jid,
get_users_and_subscribers(StateData),
Message,
?NS_MUCSUB_NODES_CONFIG,
StateData);
true ->
ok
end.
-spec remove_nonmembers(state()) -> state().
remove_nonmembers(StateData) ->
lists:foldl(fun ({_LJID, #user{jid = JID}}, SD) ->
Affiliation = get_affiliation(JID, SD),
case Affiliation of
none ->
catch send_kickban_presence(<<"">>, JID, <<"">>,
322, SD),
set_role(JID, none, SD);
_ -> SD
end
end,
StateData, (?DICT):to_list(get_users_and_subscribers(StateData))).
-spec set_opts([{atom(), any()}], state()) -> state().
set_opts([], StateData) -> StateData;
set_opts([{Opt, Val} | Opts], StateData) ->
NSD = case Opt of
title ->
StateData#state{config =
(StateData#state.config)#config{title =
Val}};
description ->
StateData#state{config =
(StateData#state.config)#config{description
= Val}};
allow_change_subj ->
StateData#state{config =
(StateData#state.config)#config{allow_change_subj
= Val}};
allow_query_users ->
StateData#state{config =
(StateData#state.config)#config{allow_query_users
= Val}};
allow_private_messages ->
StateData#state{config =
(StateData#state.config)#config{allow_private_messages
= Val}};
allow_private_messages_from_visitors ->
StateData#state{config =
(StateData#state.config)#config{allow_private_messages_from_visitors
= Val}};
allow_visitor_nickchange ->
StateData#state{config =
(StateData#state.config)#config{allow_visitor_nickchange
= Val}};
allow_visitor_status ->
StateData#state{config =
(StateData#state.config)#config{allow_visitor_status
= Val}};
public ->
StateData#state{config =
(StateData#state.config)#config{public =
Val}};
public_list ->
StateData#state{config =
(StateData#state.config)#config{public_list
= Val}};
persistent ->
StateData#state{config =
(StateData#state.config)#config{persistent =
Val}};
moderated ->
StateData#state{config =
(StateData#state.config)#config{moderated =
Val}};
members_by_default ->
StateData#state{config =
(StateData#state.config)#config{members_by_default
= Val}};
members_only ->
StateData#state{config =
(StateData#state.config)#config{members_only
= Val}};
allow_user_invites ->
StateData#state{config =
(StateData#state.config)#config{allow_user_invites
= Val}};
password_protected ->
StateData#state{config =
(StateData#state.config)#config{password_protected
= Val}};
captcha_protected ->
StateData#state{config =
(StateData#state.config)#config{captcha_protected
= Val}};
password ->
StateData#state{config =
(StateData#state.config)#config{password =
Val}};
anonymous ->
StateData#state{config =
(StateData#state.config)#config{anonymous =
Val}};
presence_broadcast ->
StateData#state{config =
(StateData#state.config)#config{presence_broadcast =
Val}};
logging ->
StateData#state{config =
(StateData#state.config)#config{logging =
Val}};
mam ->
StateData#state{config =
(StateData#state.config)#config{mam = Val}};
captcha_whitelist ->
StateData#state{config =
(StateData#state.config)#config{captcha_whitelist
=
(?SETS):from_list(Val)}};
allow_voice_requests ->
StateData#state{config =
(StateData#state.config)#config{allow_voice_requests
= Val}};
voice_request_min_interval ->
StateData#state{config =
(StateData#state.config)#config{voice_request_min_interval
= Val}};
max_users ->
ServiceMaxUsers = get_service_max_users(StateData),
MaxUsers = if Val =< ServiceMaxUsers -> Val;
true -> ServiceMaxUsers
end,
StateData#state{config =
(StateData#state.config)#config{max_users =
MaxUsers}};
vcard ->
StateData#state{config =
(StateData#state.config)#config{vcard =
Val}};
allow_subscription ->
StateData#state{config =
(StateData#state.config)#config{allow_subscription = Val}};
subscribers ->
Subscribers = lists:foldl(
fun({JID, Nick, Nodes}, Acc) ->
BareJID = jid:remove_resource(JID),
?DICT:store(
jid:tolower(BareJID),
#subscriber{jid = BareJID,
nick = Nick,
nodes = Nodes},
Acc)
end, ?DICT:new(), Val),
StateData#state{subscribers = Subscribers};
affiliations ->
StateData#state{affiliations = (?DICT):from_list(Val)};
subject -> StateData#state{subject = Val};
subject_author -> StateData#state{subject_author = Val};
_ -> StateData
end,
set_opts(Opts, NSD).
-define(MAKE_CONFIG_OPT(Opt),
{get_config_opt_name(Opt), element(Opt, Config)}).
-spec make_opts(state()) -> [{atom(), any()}].
make_opts(StateData) ->
Config = StateData#state.config,
Subscribers = (?DICT):fold(
fun(_LJID, Sub, Acc) ->
[{Sub#subscriber.jid,
Sub#subscriber.nick,
Sub#subscriber.nodes}|Acc]
end, [], StateData#state.subscribers),
[?MAKE_CONFIG_OPT(#config.title), ?MAKE_CONFIG_OPT(#config.description),
?MAKE_CONFIG_OPT(#config.allow_change_subj),
?MAKE_CONFIG_OPT(#config.allow_query_users),
?MAKE_CONFIG_OPT(#config.allow_private_messages),
?MAKE_CONFIG_OPT(#config.allow_private_messages_from_visitors),
?MAKE_CONFIG_OPT(#config.allow_visitor_status),
?MAKE_CONFIG_OPT(#config.allow_visitor_nickchange),
?MAKE_CONFIG_OPT(#config.public), ?MAKE_CONFIG_OPT(#config.public_list),
?MAKE_CONFIG_OPT(#config.persistent),
?MAKE_CONFIG_OPT(#config.moderated),
?MAKE_CONFIG_OPT(#config.members_by_default),
?MAKE_CONFIG_OPT(#config.members_only),
?MAKE_CONFIG_OPT(#config.allow_user_invites),
?MAKE_CONFIG_OPT(#config.password_protected),
?MAKE_CONFIG_OPT(#config.captcha_protected),
?MAKE_CONFIG_OPT(#config.password), ?MAKE_CONFIG_OPT(#config.anonymous),
?MAKE_CONFIG_OPT(#config.logging), ?MAKE_CONFIG_OPT(#config.max_users),
?MAKE_CONFIG_OPT(#config.allow_voice_requests),
?MAKE_CONFIG_OPT(#config.allow_subscription),
?MAKE_CONFIG_OPT(#config.mam),
?MAKE_CONFIG_OPT(#config.voice_request_min_interval),
?MAKE_CONFIG_OPT(#config.vcard),
{captcha_whitelist,
(?SETS):to_list((StateData#state.config)#config.captcha_whitelist)},
{affiliations,
(?DICT):to_list(StateData#state.affiliations)},
{subject, StateData#state.subject},
{subject_author, StateData#state.subject_author},
{subscribers, Subscribers}].
-spec destroy_room(muc_destroy(), state()) -> {result, undefined, stop}.
destroy_room(DEl, StateData) ->
Destroy = DEl#muc_destroy{xmlns = ?NS_MUC_USER},
lists:foreach(
fun({_LJID, Info}) ->
Nick = Info#user.nick,
Item = #muc_item{affiliation = none,
role = none},
Packet = #presence{
type = unavailable,
sub_els = [#muc_user{items = [Item],
destroy = Destroy}]},
send_wrapped(jid:replace_resource(StateData#state.jid, Nick),
Info#user.jid, Packet,
?NS_MUCSUB_NODES_CONFIG, StateData)
end,
(?DICT):to_list(get_users_and_subscribers(StateData))),
case (StateData#state.config)#config.persistent of
true ->
mod_muc:forget_room(StateData#state.server_host,
StateData#state.host, StateData#state.room);
false -> ok
end,
{result, undefined, stop}.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Disco
-define(CONFIG_OPT_TO_FEATURE(Opt, Fiftrue, Fiffalse),
case Opt of
true -> Fiftrue;
false -> Fiffalse
end).
-spec process_iq_disco_info(jid(), iq(), state()) ->
{result, disco_info()} | {error, stanza_error()}.
process_iq_disco_info(_From, #iq{type = set, lang = Lang}, _StateData) ->
Txt = <<"Value 'set' of 'type' attribute is not allowed">>,
{error, xmpp:err_not_allowed(Txt, Lang)};
process_iq_disco_info(_From, #iq{type = get, lang = Lang}, StateData) ->
Config = StateData#state.config,
Feats = [?NS_VCARD, ?NS_MUC,
?CONFIG_OPT_TO_FEATURE((Config#config.public),
<<"muc_public">>, <<"muc_hidden">>),
?CONFIG_OPT_TO_FEATURE((Config#config.persistent),
<<"muc_persistent">>, <<"muc_temporary">>),
?CONFIG_OPT_TO_FEATURE((Config#config.members_only),
<<"muc_membersonly">>, <<"muc_open">>),
?CONFIG_OPT_TO_FEATURE((Config#config.anonymous),
<<"muc_semianonymous">>, <<"muc_nonanonymous">>),
?CONFIG_OPT_TO_FEATURE((Config#config.moderated),
<<"muc_moderated">>, <<"muc_unmoderated">>),
?CONFIG_OPT_TO_FEATURE((Config#config.password_protected),
<<"muc_passwordprotected">>, <<"muc_unsecured">>)]
++ case Config#config.allow_subscription of
true -> [?NS_MUCSUB];
false -> []
end
++ case {gen_mod:is_loaded(StateData#state.server_host, mod_mam),
Config#config.mam} of
{true, true} ->
[?NS_MAM_TMP, ?NS_MAM_0, ?NS_MAM_1];
_ ->
[]
end,
{result, #disco_info{xdata = [iq_disco_info_extras(Lang, StateData)],
identities = [#identity{category = <<"conference">>,
type = <<"text">>,
name = get_title(StateData)}],
features = Feats}}.
-spec iq_disco_info_extras(binary(), state()) -> xdata().
iq_disco_info_extras(Lang, StateData) ->
Fs = [{description, (StateData#state.config)#config.description},
{occupants, ?DICT:size(StateData#state.users)}],
#xdata{type = result,
fields = muc_roominfo:encode(
Fs, fun(T) -> translate:translate(Lang, T) end)}.
-spec process_iq_disco_items(jid(), iq(), state()) ->
{error, stanza_error()} | {result, disco_items()}.
process_iq_disco_items(_From, #iq{type = set, lang = Lang}, _StateData) ->
Txt = <<"Value 'set' of 'type' attribute is not allowed">>,
{error, xmpp:err_not_allowed(Txt, Lang)};
process_iq_disco_items(From, #iq{type = get}, StateData) ->
case (StateData#state.config)#config.public_list of
true ->
{result, get_mucroom_disco_items(StateData)};
_ ->
case is_occupant_or_admin(From, StateData) of
true ->
{result, get_mucroom_disco_items(StateData)};
_ ->
%% If the list of occupants is private,
%% the room MUST return an empty <query/> element
%% (http://xmpp.org/extensions/xep-0045.html#disco-roomitems)
{result, #disco_items{}}
end
end.
-spec process_iq_captcha(jid(), iq(), state()) -> {error, stanza_error()} |
{result, undefined}.
process_iq_captcha(_From, #iq{type = get, lang = Lang}, _StateData) ->
Txt = <<"Value 'get' of 'type' attribute is not allowed">>,
{error, xmpp:err_not_allowed(Txt, Lang)};
process_iq_captcha(_From, #iq{type = set, lang = Lang, sub_els = [SubEl]},
_StateData) ->
case ejabberd_captcha:process_reply(SubEl) of
ok -> {result, undefined};
{error, malformed} ->
Txt = <<"Incorrect CAPTCHA submit">>,
{error, xmpp:err_bad_request(Txt, Lang)};
_ ->
Txt = <<"The CAPTCHA verification has failed">>,
{error, xmpp:err_not_allowed(Txt, Lang)}
end.
-spec process_iq_vcard(jid(), iq(), state()) ->
{result, vcard_temp() | xmlel()} |
{result, undefined, state()} |
{error, stanza_error()}.
process_iq_vcard(_From, #iq{type = get}, StateData) ->
#state{config = #config{vcard = VCardRaw}} = StateData,
case fxml_stream:parse_element(VCardRaw) of
#xmlel{} = VCard ->
{result, VCard};
{error, _} ->
{error, xmpp:err_item_not_found()}
end;
process_iq_vcard(From, #iq{type = set, lang = Lang, sub_els = [SubEl]},
StateData) ->
case get_affiliation(From, StateData) of
owner ->
VCardRaw = fxml:element_to_binary(xmpp:encode(SubEl)),
Config = StateData#state.config,
NewConfig = Config#config{vcard = VCardRaw},
change_config(NewConfig, StateData);
_ ->
ErrText = <<"Owner privileges required">>,
{error, xmpp:err_forbidden(ErrText, Lang)}
end.
-spec process_iq_mucsub(jid(), iq(), state()) ->
{error, stanza_error()} |
{result, undefined | muc_subscribe(), state()} |
{ignore, state()}.
process_iq_mucsub(_From, #iq{type = set, lang = Lang,
sub_els = [#muc_subscribe{}]},
#state{config = #config{allow_subscription = false}}) ->
{error, xmpp:err_not_allowed(<<"Subscriptions are not allowed">>, Lang)};
process_iq_mucsub(From,
#iq{type = set, lang = Lang,
sub_els = [#muc_subscribe{nick = Nick}]} = Packet,
StateData) ->
LBareJID = jid:tolower(jid:remove_resource(From)),
case (?DICT):find(LBareJID, StateData#state.subscribers) of
{ok, #subscriber{nick = Nick1}} when Nick1 /= Nick ->
Nodes = get_subscription_nodes(Packet),
case {nick_collision(From, Nick, StateData),
mod_muc:can_use_nick(StateData#state.server_host,
StateData#state.host,
From, Nick)} of
{true, _} ->
ErrText = <<"That nickname is already in use by another occupant">>,
{error, xmpp:err_conflict(ErrText, Lang)};
{_, false} ->
ErrText = <<"That nickname is registered by another person">>,
{error, xmpp:err_conflict(ErrText, Lang)};
_ ->
NewStateData = set_subscriber(From, Nick, Nodes, StateData),
{result, subscribe_result(Packet), NewStateData}
end;
{ok, #subscriber{}} ->
Nodes = get_subscription_nodes(Packet),
NewStateData = set_subscriber(From, Nick, Nodes, StateData),
{result, subscribe_result(Packet), NewStateData};
error ->
add_new_user(From, Nick, Packet, StateData)
end;
process_iq_mucsub(From, #iq{type = set, sub_els = [#muc_unsubscribe{}]},
StateData) ->
LBareJID = jid:tolower(jid:remove_resource(From)),
case ?DICT:find(LBareJID, StateData#state.subscribers) of
{ok, #subscriber{nick = Nick}} ->
Nicks = ?DICT:erase(Nick, StateData#state.subscriber_nicks),
Subscribers = ?DICT:erase(LBareJID, StateData#state.subscribers),
NewStateData = StateData#state{subscribers = Subscribers,
subscriber_nicks = Nicks},
store_room(NewStateData),
{result, undefined, NewStateData};
_ ->
{result, undefined, StateData}
end;
process_iq_mucsub(From, #iq{type = get, lang = Lang,
sub_els = [#muc_subscriptions{}]},
StateData) ->
FAffiliation = get_affiliation(From, StateData),
FRole = get_role(From, StateData),
if FRole == moderator; FAffiliation == owner; FAffiliation == admin ->
JIDs = dict:fold(
fun(_, #subscriber{jid = J}, Acc) ->
[J|Acc]
end, [], StateData#state.subscribers),
{result, #muc_subscriptions{list = JIDs}, StateData};
true ->
Txt = <<"Moderator privileges required">>,
{error, xmpp:err_forbidden(Txt, Lang)}
end;
process_iq_mucsub(_From, #iq{type = get, lang = Lang}, _StateData) ->
Txt = <<"Value 'get' of 'type' attribute is not allowed">>,
{error, xmpp:err_bad_request(Txt, Lang)}.
remove_subscriptions(StateData) ->
if not (StateData#state.config)#config.allow_subscription ->
StateData#state{subscribers = ?DICT:new(),
subscriber_nicks = ?DICT:new()};
true ->
StateData
end.
-spec get_subscription_nodes(iq()) -> [binary()].
get_subscription_nodes(#iq{sub_els = [#muc_subscribe{events = Nodes}]}) ->
lists:filter(
fun(Node) ->
lists:member(Node, [?NS_MUCSUB_NODES_PRESENCE,
?NS_MUCSUB_NODES_MESSAGES,
?NS_MUCSUB_NODES_AFFILIATIONS,
?NS_MUCSUB_NODES_SUBJECT,
?NS_MUCSUB_NODES_CONFIG,
?NS_MUCSUB_NODES_PARTICIPANTS])
end, Nodes);
get_subscription_nodes(_) ->
[].
-spec subscribe_result(iq()) -> muc_subscribe().
subscribe_result(#iq{sub_els = [#muc_subscribe{nick = Nick}]} = Packet) ->
#muc_subscribe{nick = Nick, events = get_subscription_nodes(Packet)}.
-spec get_title(state()) -> binary().
get_title(StateData) ->
case (StateData#state.config)#config.title of
<<"">> -> StateData#state.room;
Name -> Name
end.
-spec get_roomdesc_reply(jid(), state(), binary()) -> {item, binary()} | false.
get_roomdesc_reply(JID, StateData, Tail) ->
IsOccupantOrAdmin = is_occupant_or_admin(JID,
StateData),
if (StateData#state.config)#config.public or
IsOccupantOrAdmin ->
if (StateData#state.config)#config.public_list or
IsOccupantOrAdmin ->
{item, <<(get_title(StateData))/binary,Tail/binary>>};
true -> {item, get_title(StateData)}
end;
true -> false
end.
-spec get_roomdesc_tail(state(), binary()) -> binary().
get_roomdesc_tail(StateData, Lang) ->
Desc = case (StateData#state.config)#config.public of
true -> <<"">>;
_ -> translate:translate(Lang, <<"private, ">>)
end,
Len = (?DICT):size(StateData#state.users),
<<" (", Desc/binary, (integer_to_binary(Len))/binary, ")">>.
-spec get_mucroom_disco_items(state()) -> disco_items().
get_mucroom_disco_items(StateData) ->
Items = lists:map(
fun({_LJID, Info}) ->
Nick = Info#user.nick,
#disco_item{jid = jid:make(StateData#state.room,
StateData#state.host,
Nick),
name = Nick}
end,
(?DICT):to_list(StateData#state.users)),
#disco_items{items = Items}.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Voice request support
-spec prepare_request_form(jid(), binary(), binary()) -> message().
prepare_request_form(Requester, Nick, Lang) ->
Title = translate:translate(Lang, <<"Voice request">>),
Instruction = translate:translate(
Lang, <<"Either approve or decline the voice request.">>),
Fs = muc_request:encode([{role, participant},
{jid, Requester},
{roomnick, Nick},
{request_allow, false}],
fun(T) -> translate:translate(Lang, T) end),
#message{type = normal,
sub_els = [#xdata{type = form,
title = Title,
instructions = [Instruction],
fields = Fs}]}.
-spec send_voice_request(jid(), binary(), state()) -> ok.
send_voice_request(From, Lang, StateData) ->
Moderators = search_role(moderator, StateData),
FromNick = find_nick_by_jid(From, StateData),
lists:foreach(fun ({_, User}) ->
ejabberd_router:route(
StateData#state.jid, User#user.jid,
prepare_request_form(From, FromNick, Lang))
end,
Moderators).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Invitation support
-spec check_invitation(jid(), muc_invite(), binary(), state()) -> {error, stanza_error()} | jid().
check_invitation(From, Invitation, Lang, StateData) ->
FAffiliation = get_affiliation(From, StateData),
CanInvite = (StateData#state.config)#config.allow_user_invites
orelse
FAffiliation == admin orelse FAffiliation == owner,
case CanInvite of
false ->
Txt = <<"Invitations are not allowed in this conference">>,
{error, xmpp:err_not_allowed(Txt, Lang)};
true ->
#muc_invite{to = JID, reason = Reason} = Invitation,
Invite = Invitation#muc_invite{to = undefined, from = From},
Password = case (StateData#state.config)#config.password_protected of
true ->
(StateData#state.config)#config.password;
false ->
undefined
end,
XUser = #muc_user{password = Password, invites = [Invite]},
XConference = #x_conference{jid = jid:make(StateData#state.room,
StateData#state.host),
reason = Reason},
Body = iolist_to_binary(
[io_lib:format(
translate:translate(
Lang,
<<"~s invites you to the room ~s">>),
[jid:to_string(From),
jid:to_string({StateData#state.room,
StateData#state.host,
<<"">>})]),
case (StateData#state.config)#config.password_protected of
true ->
<<", ",
(translate:translate(
Lang, <<"the password is">>))/binary,
" '",
((StateData#state.config)#config.password)/binary,
"'">>;
_ -> <<"">>
end,
case Reason of
<<"">> -> <<"">>;
_ -> <<" (", Reason/binary, ") ">>
end]),
Msg = #message{type = normal,
body = xmpp:mk_text(Body),
sub_els = [XUser, XConference]},
ejabberd_router:route(StateData#state.jid, JID, Msg),
JID
end.
%% Handle a message sent to the room by a non-participant.
%% If it is a decline, send to the inviter.
%% Otherwise, an error message is sent to the sender.
-spec handle_roommessage_from_nonparticipant(message(), state(), jid()) -> ok.
handle_roommessage_from_nonparticipant(Packet, StateData, From) ->
case xmpp:get_subtag(Packet, #muc_user{}) of
#muc_user{decline = #muc_decline{to = #jid{} = To} = Decline} = XUser ->
NewDecline = Decline#muc_decline{to = undefined, from = From},
NewXUser = XUser#muc_user{decline = NewDecline},
NewPacket = xmpp:set_subtag(Packet, NewXUser),
ejabberd_router:route(StateData#state.jid, To, NewPacket);
_ ->
ErrText = <<"Only occupants are allowed to send messages "
"to the conference">>,
Err = xmpp:err_not_acceptable(ErrText, xmpp:get_lang(Packet)),
ejabberd_router:route_error(StateData#state.jid, From, Packet, Err)
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Logging
add_to_log(Type, Data, StateData)
when Type == roomconfig_change_disabledlogging ->
mod_muc_log:add_to_log(StateData#state.server_host,
roomconfig_change, Data, StateData#state.jid,
make_opts(StateData));
add_to_log(Type, Data, StateData) ->
case (StateData#state.config)#config.logging of
true ->
mod_muc_log:add_to_log(StateData#state.server_host,
Type, Data, StateData#state.jid,
make_opts(StateData));
false -> ok
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Users number checking
-spec tab_add_online_user(jid(), state()) -> ok.
tab_add_online_user(JID, StateData) ->
{LUser, LServer, LResource} = jid:tolower(JID),
US = {LUser, LServer},
Room = StateData#state.room,
Host = StateData#state.host,
catch ets:insert(muc_online_users,
#muc_online_users{us = US, resource = LResource,
room = Room, host = Host}),
ok.
-spec tab_remove_online_user(jid(), state()) -> ok.
tab_remove_online_user(JID, StateData) ->
{LUser, LServer, LResource} = jid:tolower(JID),
US = {LUser, LServer},
Room = StateData#state.room,
Host = StateData#state.host,
catch ets:delete_object(muc_online_users,
#muc_online_users{us = US, resource = LResource,
room = Room, host = Host}),
ok.
-spec tab_count_user(jid()) -> non_neg_integer().
tab_count_user(JID) ->
{LUser, LServer, _} = jid:tolower(JID),
US = {LUser, LServer},
case catch ets:select(muc_online_users,
[{#muc_online_users{us = US, _ = '_'}, [], [[]]}])
of
Res when is_list(Res) -> length(Res);
_ -> 0
end.
-spec element_size(stanza()) -> non_neg_integer().
element_size(El) ->
byte_size(fxml:element_to_binary(xmpp:encode(El, ?NS_CLIENT))).
-spec store_room(state()) -> ok.
store_room(StateData) ->
if (StateData#state.config)#config.persistent ->
mod_muc:store_room(StateData#state.server_host,
StateData#state.host, StateData#state.room,
make_opts(StateData));
true ->
ok
end.
-spec send_wrapped(jid(), jid(), stanza(), binary(), state()) -> ok.
send_wrapped(From, To, Packet, Node, State) ->
LTo = jid:tolower(To),
LBareTo = jid:tolower(jid:remove_resource(To)),
IsOffline = case ?DICT:find(LTo, State#state.users) of
{ok, #user{last_presence = undefined}} -> true;
error -> true;
_ -> false
end,
if IsOffline ->
case ?DICT:find(LBareTo, State#state.subscribers) of
{ok, #subscriber{nodes = Nodes, jid = JID}} ->
case lists:member(Node, Nodes) of
true ->
NewPacket = wrap(From, JID, Packet, Node),
ejabberd_router:route(State#state.jid, JID, NewPacket);
false ->
ok
end;
_ ->
ok
end;
true ->
ejabberd_router:route(From, To, Packet)
end.
-spec wrap(jid(), jid(), stanza(), binary()) -> message().
wrap(From, To, Packet, Node) ->
El = xmpp:encode(xmpp:set_from_to(Packet, From, To)),
#message{
sub_els = [#ps_event{
items = #ps_items{
node = Node,
items = [#ps_item{
id = randoms:get_string(),
xml_els = [El]}]}}]}.
%% -spec send_multiple(jid(), binary(), [#user{}], stanza()) -> ok.
%% send_multiple(From, Server, Users, Packet) ->
%% JIDs = [ User#user.jid || {_, User} <- ?DICT:to_list(Users)],
%% ejabberd_router_multicast:route_multicast(From, Server, JIDs, Packet).
-spec send_wrapped_multiple(jid(), [#user{}], stanza(), binary(), state()) -> ok.
send_wrapped_multiple(From, Users, Packet, Node, State) ->
lists:foreach(
fun({_, #user{jid = To}}) ->
send_wrapped(From, To, Packet, Node, State)
end, ?DICT:to_list(Users)).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Detect messange stanzas that don't have meaninful content
-spec has_body_or_subject(message()) -> boolean().
has_body_or_subject(#message{body = Body, subject = Subj}) ->
Body /= [] orelse Subj /= [].
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