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xmpp.chapril.org-ejabberd/src/mod_muc_mnesia.erl
2018-09-12 11:01:05 +00:00

407 lines
13 KiB
Erlang

%%%-------------------------------------------------------------------
%%% File : mod_muc_mnesia.erl
%%% Author : Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% Created : 13 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2018 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_mnesia).
-behaviour(mod_muc).
-behaviour(mod_muc_room).
%% API
-export([init/2, import/3, store_room/5, restore_room/3, forget_room/3,
can_use_nick/4, get_rooms/2, get_nick/3, set_nick/4]).
-export([register_online_room/4, unregister_online_room/4, find_online_room/3,
get_online_rooms/3, count_online_rooms/2, rsm_supported/0,
register_online_user/4, unregister_online_user/4,
count_online_rooms_by_user/3, get_online_rooms_by_user/3,
get_subscribed_rooms/3]).
-export([set_affiliation/6, set_affiliations/4, get_affiliation/5,
get_affiliations/3, search_affiliation/4]).
%% gen_server callbacks
-export([start_link/2, init/1, handle_cast/2, handle_call/3, handle_info/2,
terminate/2, code_change/3]).
-export([need_transform/1, transform/1]).
-include("mod_muc.hrl").
-include("logger.hrl").
-include("xmpp.hrl").
-include_lib("stdlib/include/ms_transform.hrl").
-record(state, {}).
%%%===================================================================
%%% API
%%%===================================================================
init(Host, Opts) ->
Spec = {?MODULE, {?MODULE, start_link, [Host, Opts]},
transient, 5000, worker, [?MODULE]},
case supervisor:start_child(ejabberd_backend_sup, Spec) of
{ok, _Pid} -> ok;
Err -> Err
end.
start_link(Host, Opts) ->
Name = gen_mod:get_module_proc(Host, ?MODULE),
gen_server:start_link({local, Name}, ?MODULE, [Host, Opts], []).
store_room(_LServer, Host, Name, Opts, _) ->
F = fun () ->
mnesia:write(#muc_room{name_host = {Name, Host},
opts = Opts})
end,
mnesia:transaction(F).
restore_room(_LServer, Host, Name) ->
case catch mnesia:dirty_read(muc_room, {Name, Host}) of
[#muc_room{opts = Opts}] -> Opts;
_ -> error
end.
forget_room(_LServer, Host, Name) ->
F = fun () -> mnesia:delete({muc_room, {Name, Host}})
end,
mnesia:transaction(F).
can_use_nick(_LServer, Host, JID, Nick) ->
{LUser, LServer, _} = jid:tolower(JID),
LUS = {LUser, LServer},
case catch mnesia:dirty_select(muc_registered,
[{#muc_registered{us_host = '$1',
nick = Nick, _ = '_'},
[{'==', {element, 2, '$1'}, Host}],
['$_']}])
of
{'EXIT', _Reason} -> true;
[] -> true;
[#muc_registered{us_host = {U, _Host}}] -> U == LUS
end.
get_rooms(_LServer, Host) ->
mnesia:dirty_select(muc_room,
[{#muc_room{name_host = {'_', Host},
_ = '_'},
[], ['$_']}]).
get_nick(_LServer, Host, From) ->
{LUser, LServer, _} = jid:tolower(From),
LUS = {LUser, LServer},
case mnesia:dirty_read(muc_registered, {LUS, Host}) of
[] -> error;
[#muc_registered{nick = Nick}] -> Nick
end.
set_nick(_LServer, Host, From, Nick) ->
{LUser, LServer, _} = jid:tolower(From),
LUS = {LUser, LServer},
F = fun () ->
case Nick of
<<"">> ->
mnesia:delete({muc_registered, {LUS, Host}}),
ok;
_ ->
Allow = case mnesia:select(
muc_registered,
[{#muc_registered{us_host =
'$1',
nick = Nick,
_ = '_'},
[{'==', {element, 2, '$1'},
Host}],
['$_']}]) of
[] -> true;
[#muc_registered{us_host = {U, _Host}}] ->
U == LUS
end,
if Allow ->
mnesia:write(#muc_registered{
us_host = {LUS, Host},
nick = Nick}),
ok;
true ->
false
end
end
end,
mnesia:transaction(F).
set_affiliation(_ServerHost, _Room, _Host, _JID, _Affiliation, _Reason) ->
{error, not_implemented}.
set_affiliations(_ServerHost, _Room, _Host, _Affiliations) ->
{error, not_implemented}.
get_affiliation(_ServerHost, _Room, _Host, _LUser, _LServer) ->
{error, not_implemented}.
get_affiliations(_ServerHost, _Room, _Host) ->
{error, not_implemented}.
search_affiliation(_ServerHost, _Room, _Host, _Affiliation) ->
{error, not_implemented}.
register_online_room(_ServerHost, Room, Host, Pid) ->
F = fun() ->
mnesia:write(
#muc_online_room{name_host = {Room, Host}, pid = Pid})
end,
mnesia:transaction(F).
unregister_online_room(_ServerHost, Room, Host, Pid) ->
F = fun () ->
mnesia:delete_object(
#muc_online_room{name_host = {Room, Host}, pid = Pid})
end,
mnesia:transaction(F).
find_online_room(_ServerHost, Room, Host) ->
find_online_room(Room, Host).
find_online_room(Room, Host) ->
case mnesia:dirty_read(muc_online_room, {Room, Host}) of
[] -> error;
[#muc_online_room{pid = Pid}] -> {ok, Pid}
end.
count_online_rooms(_ServerHost, Host) ->
ets:select_count(
muc_online_room,
ets:fun2ms(
fun(#muc_online_room{name_host = {_, H}}) ->
H == Host
end)).
get_online_rooms(_ServerHost, Host,
#rsm_set{max = Max, 'after' = After, before = undefined})
when is_binary(After), After /= <<"">> ->
lists:reverse(get_online_rooms(next, {After, Host}, Host, 0, Max, []));
get_online_rooms(_ServerHost, Host,
#rsm_set{max = Max, 'after' = undefined, before = Before})
when is_binary(Before), Before /= <<"">> ->
get_online_rooms(prev, {Before, Host}, Host, 0, Max, []);
get_online_rooms(_ServerHost, Host,
#rsm_set{max = Max, 'after' = undefined, before = <<"">>}) ->
get_online_rooms(last, {<<"">>, Host}, Host, 0, Max, []);
get_online_rooms(_ServerHost, Host, #rsm_set{max = Max}) ->
lists:reverse(get_online_rooms(first, {<<"">>, Host}, Host, 0, Max, []));
get_online_rooms(_ServerHost, Host, undefined) ->
mnesia:dirty_select(
muc_online_room,
ets:fun2ms(
fun(#muc_online_room{name_host = {Name, H}, pid = Pid})
when H == Host -> {Name, Host, Pid}
end)).
-spec get_online_rooms(prev | next | last | first,
{binary(), binary()}, binary(),
non_neg_integer(), non_neg_integer() | undefined,
[{binary(), binary(), pid()}]) ->
[{binary(), binary(), pid()}].
get_online_rooms(_Action, _Key, _Host, Count, Max, Items) when Count >= Max ->
Items;
get_online_rooms(Action, Key, Host, Count, Max, Items) ->
Call = fun() ->
case Action of
prev -> mnesia:dirty_prev(muc_online_room, Key);
next -> mnesia:dirty_next(muc_online_room, Key);
last -> mnesia:dirty_last(muc_online_room);
first -> mnesia:dirty_first(muc_online_room)
end
end,
NewAction = case Action of
last -> prev;
first -> next;
_ -> Action
end,
try Call() of
'$end_of_table' ->
Items;
{Room, Host} = NewKey ->
case find_online_room(Room, Host) of
{ok, Pid} ->
get_online_rooms(NewAction, NewKey, Host,
Count + 1, Max, [{Room, Host, Pid}|Items]);
error ->
get_online_rooms(NewAction, NewKey, Host,
Count, Max, Items)
end;
NewKey ->
get_online_rooms(NewAction, NewKey, Host, Count, Max, Items)
catch _:{aborted, {badarg, _}} ->
Items
end.
rsm_supported() ->
true.
register_online_user(_ServerHost, {U, S, R}, Room, Host) ->
ets:insert(muc_online_users,
#muc_online_users{us = {U, S}, resource = R,
room = Room, host = Host}).
unregister_online_user(_ServerHost, {U, S, R}, Room, Host) ->
ets:delete_object(muc_online_users,
#muc_online_users{us = {U, S}, resource = R,
room = Room, host = Host}).
count_online_rooms_by_user(ServerHost, U, S) ->
MucHost = gen_mod:get_module_opt_host(ServerHost, mod_muc, <<"conference.@HOST@">>),
ets:select_count(
muc_online_users,
ets:fun2ms(
fun(#muc_online_users{us = {U1, S1}, host = Host}) ->
U == U1 andalso S == S1 andalso MucHost == Host
end)).
get_online_rooms_by_user(ServerHost, U, S) ->
MucHost = gen_mod:get_module_opt_host(ServerHost, mod_muc, <<"conference.@HOST@">>),
ets:select(
muc_online_users,
ets:fun2ms(
fun(#muc_online_users{us = {U1, S1}, room = Room, host = Host})
when U == U1 andalso S == S1 andalso MucHost == Host -> {Room, Host}
end)).
import(_LServer, <<"muc_room">>,
[Name, RoomHost, SOpts, _TimeStamp]) ->
Opts = mod_muc:opts_to_binary(ejabberd_sql:decode_term(SOpts)),
mnesia:dirty_write(
#muc_room{name_host = {Name, RoomHost},
opts = Opts});
import(_LServer, <<"muc_registered">>,
[J, RoomHost, Nick, _TimeStamp]) ->
#jid{user = U, server = S} = jid:decode(J),
mnesia:dirty_write(
#muc_registered{us_host = {{U, S}, RoomHost},
nick = Nick}).
%%%===================================================================
%%% gen_server callbacks
%%%===================================================================
init([Host, Opts]) ->
MyHosts = proplists:get_value(hosts, Opts),
case gen_mod:db_mod(Host, Opts, mod_muc) of
?MODULE ->
ejabberd_mnesia:create(?MODULE, muc_room,
[{disc_copies, [node()]},
{attributes,
record_info(fields, muc_room)}]),
ejabberd_mnesia:create(?MODULE, muc_registered,
[{disc_copies, [node()]},
{attributes,
record_info(fields, muc_registered)},
{index, [nick]}]);
_ ->
ok
end,
case gen_mod:ram_db_mod(Host, Opts, mod_muc) of
?MODULE ->
ejabberd_mnesia:create(?MODULE, muc_online_room,
[{ram_copies, [node()]},
{type, ordered_set},
{attributes, record_info(fields, muc_online_room)}]),
catch ets:new(muc_online_users, [bag, named_table, public, {keypos, 2}]),
lists:foreach(
fun(MyHost) ->
clean_table_from_bad_node(node(), MyHost)
end, MyHosts),
mnesia:subscribe(system);
_ ->
ok
end,
{ok, #state{}}.
handle_call(_Request, _From, State) ->
Reply = ok,
{reply, Reply, State}.
handle_cast(_Msg, State) ->
{noreply, State}.
handle_info({mnesia_system_event, {mnesia_down, Node}}, State) ->
clean_table_from_bad_node(Node),
{noreply, State};
handle_info({mnesia_system_event, {mnesia_up, _Node}}, State) ->
{noreply, State};
handle_info(Info, State) ->
?ERROR_MSG("unexpected info: ~p", [Info]),
{noreply, State}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%%===================================================================
%%% Internal functions
%%%===================================================================
clean_table_from_bad_node(Node) ->
F = fun() ->
Es = mnesia:select(
muc_online_room,
[{#muc_online_room{pid = '$1', _ = '_'},
[{'==', {node, '$1'}, Node}],
['$_']}]),
lists:foreach(fun(E) ->
mnesia:delete_object(E)
end, Es)
end,
mnesia:async_dirty(F).
clean_table_from_bad_node(Node, Host) ->
F = fun() ->
Es = mnesia:select(
muc_online_room,
[{#muc_online_room{pid = '$1',
name_host = {'_', Host},
_ = '_'},
[{'==', {node, '$1'}, Node}],
['$_']}]),
lists:foreach(fun(E) ->
mnesia:delete_object(E)
end, Es)
end,
mnesia:async_dirty(F).
need_transform(#muc_room{name_host = {N, H}})
when is_list(N) orelse is_list(H) ->
?INFO_MSG("Mnesia table 'muc_room' will be converted to binary", []),
true;
need_transform(#muc_registered{us_host = {{U, S}, H}, nick = Nick})
when is_list(U) orelse is_list(S) orelse is_list(H) orelse is_list(Nick) ->
?INFO_MSG("Mnesia table 'muc_registered' will be converted to binary", []),
true;
need_transform(_) ->
false.
transform(#muc_room{name_host = {N, H}, opts = Opts} = R) ->
R#muc_room{name_host = {iolist_to_binary(N), iolist_to_binary(H)},
opts = mod_muc:opts_to_binary(Opts)};
transform(#muc_registered{us_host = {{U, S}, H}, nick = Nick} = R) ->
R#muc_registered{us_host = {{iolist_to_binary(U), iolist_to_binary(S)},
iolist_to_binary(H)},
nick = iolist_to_binary(Nick)}.
get_subscribed_rooms(_, _, _) ->
not_implemented.