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xmpp.chapril.org-ejabberd/src/mod_mam.erl

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%%%-------------------------------------------------------------------
%%% @author Evgeniy Khramtsov <ekhramtsov@process-one.net>
%%% @doc
%%% Message Archive Management (XEP-0313)
%%% @end
%%% Created : 4 Jul 2013 by Evgeniy Khramtsov <ekhramtsov@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2013-2016 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_mam).
-protocol({xep, 313, '0.4'}).
-protocol({xep, 334, '0.2'}).
-behaviour(gen_mod).
%% API
-export([start/2, stop/1]).
-export([user_send_packet/4, user_receive_packet/5,
process_iq_v0_2/3, process_iq_v0_3/3, disco_sm_features/5,
remove_user/2, remove_user/3, mod_opt_type/1, muc_process_iq/4,
muc_filter_message/5, message_is_archived/5, delete_old_messages/2,
get_commands_spec/0]).
-include_lib("stdlib/include/ms_transform.hrl").
-include("jlib.hrl").
-include("logger.hrl").
-include("mod_muc_room.hrl").
-include("ejabberd_commands.hrl").
-define(DEF_PAGE_SIZE, 50).
-define(MAX_PAGE_SIZE, 250).
-define(BIN_GREATER_THAN(A, B),
((A > B andalso byte_size(A) == byte_size(B))
orelse byte_size(A) > byte_size(B))).
-define(BIN_LESS_THAN(A, B),
((A < B andalso byte_size(A) == byte_size(B))
orelse byte_size(A) < byte_size(B))).
-record(archive_msg,
{us = {<<"">>, <<"">>} :: {binary(), binary()} | '$2',
id = <<>> :: binary() | '_',
timestamp = p1_time_compat:timestamp() :: erlang:timestamp() | '_' | '$1',
peer = {<<"">>, <<"">>, <<"">>} :: ljid() | '_' | '$3' | undefined,
bare_peer = {<<"">>, <<"">>, <<"">>} :: ljid() | '_' | '$3',
packet = #xmlel{} :: xmlel() | '_',
nick = <<"">> :: binary(),
type = chat :: chat | groupchat}).
-record(archive_prefs,
{us = {<<"">>, <<"">>} :: {binary(), binary()},
default = never :: never | always | roster,
always = [] :: [ljid()],
never = [] :: [ljid()]}).
%%%===================================================================
%%% API
%%%===================================================================
start(Host, Opts) ->
IQDisc = gen_mod:get_opt(iqdisc, Opts, fun gen_iq_handler:check_type/1,
one_queue),
DBType = gen_mod:db_type(Host, Opts),
init_db(DBType, Host),
init_cache(DBType, Opts),
gen_iq_handler:add_iq_handler(ejabberd_local, Host,
?NS_MAM_TMP, ?MODULE, process_iq_v0_2, IQDisc),
gen_iq_handler:add_iq_handler(ejabberd_sm, Host,
?NS_MAM_TMP, ?MODULE, process_iq_v0_2, IQDisc),
gen_iq_handler:add_iq_handler(ejabberd_local, Host,
?NS_MAM_0, ?MODULE, process_iq_v0_3, IQDisc),
gen_iq_handler:add_iq_handler(ejabberd_sm, Host,
?NS_MAM_0, ?MODULE, process_iq_v0_3, IQDisc),
gen_iq_handler:add_iq_handler(ejabberd_local, Host,
?NS_MAM_1, ?MODULE, process_iq_v0_3, IQDisc),
gen_iq_handler:add_iq_handler(ejabberd_sm, Host,
?NS_MAM_1, ?MODULE, process_iq_v0_3, IQDisc),
ejabberd_hooks:add(user_receive_packet, Host, ?MODULE,
user_receive_packet, 500),
ejabberd_hooks:add(user_send_packet, Host, ?MODULE,
user_send_packet, 500),
ejabberd_hooks:add(muc_filter_message, Host, ?MODULE,
muc_filter_message, 50),
ejabberd_hooks:add(muc_process_iq, Host, ?MODULE,
muc_process_iq, 50),
ejabberd_hooks:add(disco_sm_features, Host, ?MODULE,
disco_sm_features, 50),
ejabberd_hooks:add(remove_user, Host, ?MODULE,
remove_user, 50),
ejabberd_hooks:add(anonymous_purge_hook, Host, ?MODULE,
remove_user, 50),
case gen_mod:get_opt(assume_mam_usage, Opts,
fun(if_enabled) -> if_enabled;
(on_request) -> on_request;
(never) -> never
end, never) of
never ->
ok;
_ ->
ejabberd_hooks:add(message_is_archived, Host, ?MODULE,
message_is_archived, 50)
end,
ejabberd_commands:register_commands(get_commands_spec()),
ok.
init_db(mnesia, _Host) ->
mnesia:create_table(archive_msg,
[{disc_only_copies, [node()]},
{type, bag},
{attributes, record_info(fields, archive_msg)}]),
mnesia:create_table(archive_prefs,
[{disc_only_copies, [node()]},
{attributes, record_info(fields, archive_prefs)}]);
init_db(_, _) ->
ok.
init_cache(_DBType, Opts) ->
MaxSize = gen_mod:get_opt(cache_size, Opts,
fun(I) when is_integer(I), I>0 -> I end,
1000),
LifeTime = gen_mod:get_opt(cache_life_time, Opts,
fun(I) when is_integer(I), I>0 -> I end,
timer:hours(1) div 1000),
cache_tab:new(archive_prefs, [{max_size, MaxSize},
{life_time, LifeTime}]).
stop(Host) ->
ejabberd_hooks:delete(user_send_packet, Host, ?MODULE,
user_send_packet, 500),
ejabberd_hooks:delete(user_receive_packet, Host, ?MODULE,
user_receive_packet, 500),
ejabberd_hooks:delete(muc_filter_message, Host, ?MODULE,
muc_filter_message, 50),
ejabberd_hooks:delete(muc_process_iq, Host, ?MODULE,
muc_process_iq, 50),
gen_iq_handler:remove_iq_handler(ejabberd_local, Host, ?NS_MAM_TMP),
gen_iq_handler:remove_iq_handler(ejabberd_sm, Host, ?NS_MAM_TMP),
gen_iq_handler:remove_iq_handler(ejabberd_local, Host, ?NS_MAM_0),
gen_iq_handler:remove_iq_handler(ejabberd_sm, Host, ?NS_MAM_0),
gen_iq_handler:remove_iq_handler(ejabberd_local, Host, ?NS_MAM_1),
gen_iq_handler:remove_iq_handler(ejabberd_sm, Host, ?NS_MAM_1),
ejabberd_hooks:delete(disco_sm_features, Host, ?MODULE,
disco_sm_features, 50),
ejabberd_hooks:delete(remove_user, Host, ?MODULE,
remove_user, 50),
ejabberd_hooks:delete(anonymous_purge_hook, Host,
?MODULE, remove_user, 50),
case gen_mod:get_module_opt(Host, ?MODULE, assume_mam_usage,
fun(if_enabled) -> if_enabled;
(on_request) -> on_request;
(never) -> never
end, never) of
never ->
ok;
_ ->
ejabberd_hooks:delete(message_is_archived, Host, ?MODULE,
message_is_archived, 50)
end,
ejabberd_commands:unregister_commands(get_commands_spec()),
ok.
remove_user(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
remove_user(LUser, LServer,
gen_mod:db_type(LServer, ?MODULE)).
remove_user(LUser, LServer, mnesia) ->
US = {LUser, LServer},
F = fun () ->
mnesia:delete({archive_msg, US}),
mnesia:delete({archive_prefs, US})
end,
mnesia:transaction(F);
remove_user(LUser, LServer, odbc) ->
SUser = ejabberd_odbc:escape(LUser),
ejabberd_odbc:sql_query(
LServer,
[<<"delete from archive where username='">>, SUser, <<"';">>]),
ejabberd_odbc:sql_query(
LServer,
[<<"delete from archive_prefs where username='">>, SUser, <<"';">>]).
user_receive_packet(Pkt, C2SState, JID, Peer, To) ->
LUser = JID#jid.luser,
LServer = JID#jid.lserver,
IsBareCopy = is_bare_copy(JID, To),
case should_archive(Pkt, LServer) of
true when not IsBareCopy ->
NewPkt = strip_my_archived_tag(Pkt, LServer),
case store_msg(C2SState, NewPkt, LUser, LServer, Peer, recv) of
{ok, ID} ->
Archived = #xmlel{name = <<"archived">>,
attrs = [{<<"by">>, LServer},
{<<"xmlns">>, ?NS_MAM_TMP},
{<<"id">>, ID}]},
StanzaID = #xmlel{name = <<"stanza-id">>,
attrs = [{<<"by">>, LServer},
{<<"xmlns">>, ?NS_SID_0},
{<<"id">>, ID}]},
NewEls = [Archived, StanzaID|NewPkt#xmlel.children],
NewPkt#xmlel{children = NewEls};
_ ->
NewPkt
end;
_ ->
Pkt
end.
user_send_packet(Pkt, C2SState, JID, Peer) ->
LUser = JID#jid.luser,
LServer = JID#jid.lserver,
case should_archive(Pkt, LServer) of
true ->
NewPkt = strip_my_archived_tag(Pkt, LServer),
store_msg(C2SState, jlib:replace_from_to(JID, Peer, NewPkt),
LUser, LServer, Peer, send),
NewPkt;
false ->
Pkt
end.
muc_filter_message(Pkt, #state{config = Config} = MUCState,
RoomJID, From, FromNick) ->
if Config#config.mam ->
LServer = RoomJID#jid.lserver,
NewPkt = strip_my_archived_tag(Pkt, LServer),
StorePkt = strip_x_jid_tags(NewPkt),
case store_muc(MUCState, StorePkt, RoomJID, From, FromNick) of
{ok, ID} ->
Archived = #xmlel{name = <<"archived">>,
attrs = [{<<"by">>, LServer},
{<<"xmlns">>, ?NS_MAM_TMP},
{<<"id">>, ID}]},
StanzaID = #xmlel{name = <<"stanza-id">>,
attrs = [{<<"by">>, LServer},
{<<"xmlns">>, ?NS_SID_0},
{<<"id">>, ID}]},
NewEls = [Archived, StanzaID|NewPkt#xmlel.children],
NewPkt#xmlel{children = NewEls};
_ ->
NewPkt
end;
true ->
Pkt
end.
% Query archive v0.2
process_iq_v0_2(#jid{lserver = LServer} = From,
#jid{lserver = LServer} = To,
#iq{type = get, sub_el = #xmlel{name = <<"query">>} = SubEl} = IQ) ->
Fs = parse_query_v0_2(SubEl),
process_iq(LServer, From, To, IQ, SubEl, Fs, chat);
process_iq_v0_2(From, To, IQ) ->
process_iq(From, To, IQ).
% Query archive v0.3
process_iq_v0_3(#jid{lserver = LServer} = From,
#jid{lserver = LServer} = To,
#iq{type = set, sub_el = #xmlel{name = <<"query">>} = SubEl} = IQ) ->
process_iq(LServer, From, To, IQ, SubEl, get_xdata_fields(SubEl), chat);
process_iq_v0_3(#jid{lserver = LServer},
#jid{lserver = LServer},
#iq{type = get, sub_el = #xmlel{name = <<"query">>}} = IQ) ->
process_iq(LServer, IQ);
process_iq_v0_3(From, To, IQ) ->
process_iq(From, To, IQ).
muc_process_iq(#iq{type = set,
sub_el = #xmlel{name = <<"query">>,
attrs = Attrs} = SubEl} = IQ,
MUCState, From, To) ->
case fxml:get_attr_s(<<"xmlns">>, Attrs) of
NS when NS == ?NS_MAM_0; NS == ?NS_MAM_1 ->
muc_process_iq(IQ, MUCState, From, To, get_xdata_fields(SubEl));
_ ->
IQ
end;
muc_process_iq(#iq{type = get,
sub_el = #xmlel{name = <<"query">>,
attrs = Attrs} = SubEl} = IQ,
MUCState, From, To) ->
case fxml:get_attr_s(<<"xmlns">>, Attrs) of
?NS_MAM_TMP ->
muc_process_iq(IQ, MUCState, From, To, parse_query_v0_2(SubEl));
NS when NS == ?NS_MAM_0; NS == ?NS_MAM_1 ->
LServer = MUCState#state.server_host,
process_iq(LServer, IQ);
_ ->
IQ
end;
muc_process_iq(IQ, _MUCState, _From, _To) ->
IQ.
get_xdata_fields(SubEl) ->
case {fxml:get_subtag_with_xmlns(SubEl, <<"x">>, ?NS_XDATA),
fxml:get_subtag_with_xmlns(SubEl, <<"set">>, ?NS_RSM)} of
{#xmlel{} = XData, false} ->
jlib:parse_xdata_submit(XData);
{#xmlel{} = XData, #xmlel{}} ->
[{<<"set">>, SubEl} | jlib:parse_xdata_submit(XData)];
{false, #xmlel{}} ->
[{<<"set">>, SubEl}];
{false, false} ->
[]
end.
disco_sm_features(empty, From, To, Node, Lang) ->
disco_sm_features({result, []}, From, To, Node, Lang);
disco_sm_features({result, OtherFeatures},
#jid{luser = U, lserver = S},
#jid{luser = U, lserver = S}, <<>>, _Lang) ->
{result, [?NS_MAM_TMP, ?NS_MAM_0, ?NS_MAM_1 | OtherFeatures]};
disco_sm_features(Acc, _From, _To, _Node, _Lang) ->
Acc.
message_is_archived(true, _C2SState, _Peer, _JID, _Pkt) ->
true;
message_is_archived(false, C2SState, Peer,
#jid{luser = LUser, lserver = LServer}, Pkt) ->
Res = case gen_mod:get_module_opt(LServer, ?MODULE, assume_mam_usage,
fun(if_enabled) -> if_enabled;
(on_request) -> on_request;
(never) -> never
end, never) of
if_enabled ->
get_prefs(LUser, LServer);
on_request ->
DBType = gen_mod:db_type(LServer, ?MODULE),
cache_tab:lookup(archive_prefs, {LUser, LServer},
fun() ->
get_prefs(LUser, LServer, DBType)
end);
never ->
error
end,
case Res of
{ok, Prefs} ->
should_archive(strip_my_archived_tag(Pkt, LServer), LServer)
andalso should_archive_peer(C2SState, Prefs, Peer);
error ->
false
end.
delete_old_messages(TypeBin, Days) when TypeBin == <<"chat">>;
TypeBin == <<"groupchat">>;
TypeBin == <<"all">> ->
Diff = Days * 24 * 60 * 60 * 1000000,
TimeStamp = usec_to_now(p1_time_compat:system_time(micro_seconds) - Diff),
Type = jlib:binary_to_atom(TypeBin),
{Results, _} =
lists:foldl(fun(Host, {Results, MnesiaDone}) ->
case {gen_mod:db_type(Host, ?MODULE), MnesiaDone} of
{mnesia, true} ->
{Results, true};
{mnesia, false} ->
Res = delete_old_messages(TimeStamp, Type,
global, mnesia),
{[Res|Results], true};
{DBType, _} ->
Res = delete_old_messages(TimeStamp, Type,
Host, DBType),
{[Res|Results], MnesiaDone}
end
end, {[], false}, ?MYHOSTS),
case lists:filter(fun(Res) -> Res /= ok end, Results) of
[] -> ok;
[NotOk|_] -> NotOk
end;
delete_old_messages(_TypeBin, _Days) ->
unsupported_type.
delete_old_messages(TimeStamp, Type, global, mnesia) ->
MS = ets:fun2ms(fun(#archive_msg{timestamp = MsgTS,
type = MsgType} = Msg)
when MsgTS < TimeStamp,
MsgType == Type orelse Type == all ->
Msg
end),
OldMsgs = mnesia:dirty_select(archive_msg, MS),
lists:foreach(fun(Rec) ->
ok = mnesia:dirty_delete_object(Rec)
end, OldMsgs);
delete_old_messages(_TimeStamp, _Type, _Host, _DBType) ->
%% TODO
not_implemented.
%%%===================================================================
%%% Internal functions
%%%===================================================================
process_iq(LServer, #iq{sub_el = #xmlel{attrs = Attrs}} = IQ) ->
NS = case fxml:get_attr_s(<<"xmlns">>, Attrs) of
?NS_MAM_0 ->
?NS_MAM_0;
_ ->
?NS_MAM_1
end,
CommonFields = [#xmlel{name = <<"field">>,
attrs = [{<<"type">>, <<"hidden">>},
{<<"var">>, <<"FORM_TYPE">>}],
children = [#xmlel{name = <<"value">>,
children = [{xmlcdata, NS}]}]},
#xmlel{name = <<"field">>,
attrs = [{<<"type">>, <<"jid-single">>},
{<<"var">>, <<"with">>}]},
#xmlel{name = <<"field">>,
attrs = [{<<"type">>, <<"text-single">>},
{<<"var">>, <<"start">>}]},
#xmlel{name = <<"field">>,
attrs = [{<<"type">>, <<"text-single">>},
{<<"var">>, <<"end">>}]}],
Fields = case gen_mod:db_type(LServer, ?MODULE) of
odbc ->
WithText = #xmlel{name = <<"field">>,
attrs = [{<<"type">>, <<"text-single">>},
{<<"var">>, <<"withtext">>}]},
[WithText|CommonFields];
_ ->
CommonFields
end,
Form = #xmlel{name = <<"x">>,
attrs = [{<<"xmlns">>, ?NS_XDATA}, {<<"type">>, <<"form">>}],
children = Fields},
IQ#iq{type = result,
sub_el = [#xmlel{name = <<"query">>,
attrs = [{<<"xmlns">>, NS}],
children = [Form]}]}.
% Preference setting (both v0.2 & v0.3)
process_iq(#jid{luser = LUser, lserver = LServer},
#jid{lserver = LServer},
#iq{type = set, sub_el = #xmlel{name = <<"prefs">>} = SubEl} = IQ) ->
try {case fxml:get_tag_attr_s(<<"default">>, SubEl) of
<<"always">> -> always;
<<"never">> -> never;
<<"roster">> -> roster
end,
lists:foldl(
fun(#xmlel{name = <<"always">>, children = Els}, {A, N}) ->
{get_jids(Els) ++ A, N};
(#xmlel{name = <<"never">>, children = Els}, {A, N}) ->
{A, get_jids(Els) ++ N};
(_, {A, N}) ->
{A, N}
end, {[], []}, SubEl#xmlel.children)} of
{Default, {Always, Never}} ->
case write_prefs(LUser, LServer, LServer, Default,
lists:usort(Always), lists:usort(Never)) of
ok ->
IQ#iq{type = result, sub_el = []};
_Err ->
IQ#iq{type = error,
sub_el = [SubEl, ?ERR_INTERNAL_SERVER_ERROR]}
end
catch _:_ ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_BAD_REQUEST]}
end;
process_iq(#jid{luser = LUser, lserver = LServer},
#jid{lserver = LServer},
#iq{type = get, sub_el = #xmlel{name = <<"prefs">>}} = IQ) ->
Prefs = get_prefs(LUser, LServer),
Default = jlib:atom_to_binary(Prefs#archive_prefs.default),
JFun = fun(L) ->
[#xmlel{name = <<"jid">>,
children = [{xmlcdata, jid:to_string(J)}]}
|| J <- L]
end,
Always = #xmlel{name = <<"always">>,
children = JFun(Prefs#archive_prefs.always)},
Never = #xmlel{name = <<"never">>,
children = JFun(Prefs#archive_prefs.never)},
IQ#iq{type = result,
sub_el = [#xmlel{name = <<"prefs">>,
attrs = [{<<"xmlns">>, IQ#iq.xmlns},
{<<"default">>, Default}],
children = [Always, Never]}]};
process_iq(_, _, #iq{sub_el = SubEl} = IQ) ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_NOT_ALLOWED]}.
process_iq(LServer, #jid{luser = LUser} = From, To, IQ, SubEl, Fs, MsgType) ->
case MsgType of
chat ->
maybe_activate_mam(LUser, LServer);
{groupchat, _Role, _MUCState} ->
ok
end,
case catch lists:foldl(
fun({<<"start">>, [Data|_]}, {_, End, With, RSM}) ->
{{_, _, _} = jlib:datetime_string_to_timestamp(Data),
End, With, RSM};
({<<"end">>, [Data|_]}, {Start, _, With, RSM}) ->
{Start,
{_, _, _} = jlib:datetime_string_to_timestamp(Data),
With, RSM};
({<<"with">>, [Data|_]}, {Start, End, _, RSM}) ->
{Start, End, jid:tolower(jid:from_string(Data)), RSM};
({<<"withtext">>, [Data|_]}, {Start, End, _, RSM}) ->
{Start, End, {text, Data}, RSM};
({<<"set">>, El}, {Start, End, With, _}) ->
{Start, End, With, jlib:rsm_decode(El)};
(_, Acc) ->
Acc
end, {none, [], none, none}, Fs) of
{'EXIT', _} ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_BAD_REQUEST]};
{_Start, _End, _With, #rsm_in{index = Index}} when is_integer(Index) ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_FEATURE_NOT_IMPLEMENTED]};
{Start, End, With, RSM} ->
NS = fxml:get_tag_attr_s(<<"xmlns">>, SubEl),
select_and_send(LServer, From, To, Start, End,
With, limit_max(RSM, NS), IQ, MsgType)
end.
muc_process_iq(#iq{lang = Lang, sub_el = SubEl} = IQ,
#state{config = #config{members_only = MembersOnly}} = MUCState,
From, To, Fs) ->
case not MembersOnly orelse
mod_muc_room:is_occupant_or_admin(From, MUCState) of
true ->
LServer = MUCState#state.server_host,
Role = mod_muc_room:get_role(From, MUCState),
process_iq(LServer, From, To, IQ, SubEl, Fs,
{groupchat, Role, MUCState});
false ->
Text = <<"Only members may query archives of this room">>,
Error = ?ERRT_FORBIDDEN(Lang, Text),
IQ#iq{type = error, sub_el = [SubEl, Error]}
end.
parse_query_v0_2(Query) ->
lists:flatmap(
fun (#xmlel{name = <<"start">>} = El) ->
[{<<"start">>, [fxml:get_tag_cdata(El)]}];
(#xmlel{name = <<"end">>} = El) ->
[{<<"end">>, [fxml:get_tag_cdata(El)]}];
(#xmlel{name = <<"with">>} = El) ->
[{<<"with">>, [fxml:get_tag_cdata(El)]}];
(#xmlel{name = <<"withtext">>} = El) ->
[{<<"withtext">>, [fxml:get_tag_cdata(El)]}];
(#xmlel{name = <<"set">>}) ->
[{<<"set">>, Query}];
(_) ->
[]
end, Query#xmlel.children).
should_archive(#xmlel{name = <<"message">>} = Pkt, LServer) ->
case fxml:get_attr_s(<<"type">>, Pkt#xmlel.attrs) of
<<"error">> ->
false;
<<"groupchat">> ->
false;
_ ->
case is_resent(Pkt, LServer) of
true ->
false;
false ->
case check_store_hint(Pkt) of
store ->
true;
no_store ->
false;
none ->
case fxml:get_subtag_cdata(Pkt, <<"body">>) of
<<>> ->
%% Empty body
false;
_ ->
true
end
end
end
end;
should_archive(#xmlel{}, _LServer) ->
false.
strip_my_archived_tag(Pkt, LServer) ->
NewEls = lists:filter(
fun(#xmlel{name = Tag, attrs = Attrs})
when Tag == <<"archived">>; Tag == <<"stanza-id">> ->
case catch jid:nameprep(
fxml:get_attr_s(
<<"by">>, Attrs)) of
LServer ->
false;
_ ->
true
end;
(_) ->
true
end, Pkt#xmlel.children),
Pkt#xmlel{children = NewEls}.
strip_x_jid_tags(Pkt) ->
NewEls = lists:filter(
fun(#xmlel{name = <<"x">>} = XEl) ->
not lists:any(fun(ItemEl) ->
fxml:get_tag_attr(<<"jid">>, ItemEl)
/= false
end, fxml:get_subtags(XEl, <<"item">>));
(_) ->
true
end, Pkt#xmlel.children),
Pkt#xmlel{children = NewEls}.
should_archive_peer(C2SState,
#archive_prefs{default = Default,
always = Always,
never = Never},
Peer) ->
LPeer = jid:tolower(Peer),
case lists:member(LPeer, Always) of
true ->
true;
false ->
case lists:member(LPeer, Never) of
true ->
false;
false ->
case Default of
always -> true;
never -> false;
roster ->
case ejabberd_c2s:get_subscription(
LPeer, C2SState) of
both -> true;
from -> true;
to -> true;
_ -> false
end
end
end
end.
should_archive_muc(Pkt) ->
case fxml:get_attr_s(<<"type">>, Pkt#xmlel.attrs) of
<<"groupchat">> ->
case check_store_hint(Pkt) of
store ->
true;
no_store ->
false;
none ->
case fxml:get_subtag_cdata(Pkt, <<"body">>) of
<<>> ->
case fxml:get_subtag_cdata(Pkt, <<"subject">>) of
<<>> ->
false;
_ ->
true
end;
_ ->
true
end
end;
_ ->
false
end.
check_store_hint(Pkt) ->
case has_store_hint(Pkt) of
true ->
store;
false ->
case has_no_store_hint(Pkt) of
true ->
no_store;
false ->
none
end
end.
has_store_hint(Message) ->
fxml:get_subtag_with_xmlns(Message, <<"store">>, ?NS_HINTS)
/= false.
has_no_store_hint(Message) ->
fxml:get_subtag_with_xmlns(Message, <<"no-store">>, ?NS_HINTS)
/= false orelse
fxml:get_subtag_with_xmlns(Message, <<"no-storage">>, ?NS_HINTS)
/= false orelse
fxml:get_subtag_with_xmlns(Message, <<"no-permanent-store">>, ?NS_HINTS)
/= false orelse
fxml:get_subtag_with_xmlns(Message, <<"no-permanent-storage">>, ?NS_HINTS)
/= false.
is_resent(Pkt, LServer) ->
case fxml:get_subtag_with_xmlns(Pkt, <<"stanza-id">>, ?NS_SID_0) of
#xmlel{attrs = Attrs} ->
case fxml:get_attr(<<"by">>, Attrs) of
{value, LServer} ->
true;
_ ->
false
end;
false ->
false
end.
store_msg(C2SState, Pkt, LUser, LServer, Peer, Dir) ->
Prefs = get_prefs(LUser, LServer),
case should_archive_peer(C2SState, Prefs, Peer) of
true ->
US = {LUser, LServer},
store(Pkt, LServer, US, chat, Peer, <<"">>, Dir,
gen_mod:db_type(LServer, ?MODULE));
false ->
pass
end.
store_muc(MUCState, Pkt, RoomJID, Peer, Nick) ->
case should_archive_muc(Pkt) of
true ->
LServer = MUCState#state.server_host,
{U, S, _} = jid:tolower(RoomJID),
store(Pkt, LServer, {U, S}, groupchat, Peer, Nick, recv,
gen_mod:db_type(LServer, ?MODULE));
false ->
pass
end.
store(Pkt, _, {LUser, LServer}, Type, Peer, Nick, _Dir, mnesia) ->
LPeer = {PUser, PServer, _} = jid:tolower(Peer),
TS = p1_time_compat:timestamp(),
ID = jlib:integer_to_binary(now_to_usec(TS)),
case mnesia:dirty_write(
#archive_msg{us = {LUser, LServer},
id = ID,
timestamp = TS,
peer = LPeer,
bare_peer = {PUser, PServer, <<>>},
type = Type,
nick = Nick,
packet = Pkt}) of
ok ->
{ok, ID};
Err ->
Err
end;
store(Pkt, LServer, {LUser, LHost}, Type, Peer, Nick, _Dir, odbc) ->
TSinteger = p1_time_compat:system_time(micro_seconds),
ID = TS = jlib:integer_to_binary(TSinteger),
SUser = case Type of
chat -> LUser;
groupchat -> jid:to_string({LUser, LHost, <<>>})
end,
BarePeer = jid:to_string(
jid:tolower(
jid:remove_resource(Peer))),
LPeer = jid:to_string(
jid:tolower(Peer)),
XML = fxml:element_to_binary(Pkt),
Body = fxml:get_subtag_cdata(Pkt, <<"body">>),
case ejabberd_odbc:sql_query(
LServer,
[<<"insert into archive (username, timestamp, "
"peer, bare_peer, xml, txt, kind, nick) values (">>,
<<"'">>, ejabberd_odbc:escape(SUser), <<"', ">>,
<<"'">>, TS, <<"', ">>,
<<"'">>, ejabberd_odbc:escape(LPeer), <<"', ">>,
<<"'">>, ejabberd_odbc:escape(BarePeer), <<"', ">>,
<<"'">>, ejabberd_odbc:escape(XML), <<"', ">>,
<<"'">>, ejabberd_odbc:escape(Body), <<"', ">>,
<<"'">>, jlib:atom_to_binary(Type), <<"', ">>,
<<"'">>, ejabberd_odbc:escape(Nick), <<"');">>]) of
{updated, _} ->
{ok, ID};
Err ->
Err
end.
write_prefs(LUser, LServer, Host, Default, Always, Never) ->
DBType = case gen_mod:db_type(Host, ?MODULE) of
odbc -> {odbc, Host};
DB -> DB
end,
Prefs = #archive_prefs{us = {LUser, LServer},
default = Default,
always = Always,
never = Never},
cache_tab:dirty_insert(
archive_prefs, {LUser, LServer}, Prefs,
fun() -> write_prefs(LUser, LServer, Prefs, DBType) end).
write_prefs(_LUser, _LServer, Prefs, mnesia) ->
mnesia:dirty_write(Prefs);
write_prefs(LUser, _LServer, #archive_prefs{default = Default,
never = Never,
always = Always},
{odbc, Host}) ->
SUser = ejabberd_odbc:escape(LUser),
SDefault = erlang:atom_to_binary(Default, utf8),
SAlways = ejabberd_odbc:encode_term(Always),
SNever = ejabberd_odbc:encode_term(Never),
case update(Host, <<"archive_prefs">>,
[<<"username">>, <<"def">>, <<"always">>, <<"never">>],
[SUser, SDefault, SAlways, SNever],
[<<"username='">>, SUser, <<"'">>]) of
{updated, _} ->
ok;
Err ->
Err
end.
get_prefs(LUser, LServer) ->
DBType = gen_mod:db_type(LServer, ?MODULE),
Res = cache_tab:lookup(archive_prefs, {LUser, LServer},
fun() -> get_prefs(LUser, LServer,
DBType)
end),
case Res of
{ok, Prefs} ->
Prefs;
error ->
ActivateOpt = gen_mod:get_module_opt(
LServer, ?MODULE, request_activates_archiving,
fun(B) when is_boolean(B) -> B end, false),
case ActivateOpt of
true ->
#archive_prefs{us = {LUser, LServer}, default = never};
false ->
Default = gen_mod:get_module_opt(
LServer, ?MODULE, default,
fun(always) -> always;
(never) -> never;
(roster) -> roster
end, never),
#archive_prefs{us = {LUser, LServer}, default = Default}
end
end.
get_prefs(LUser, LServer, mnesia) ->
case mnesia:dirty_read(archive_prefs, {LUser, LServer}) of
[Prefs] ->
{ok, Prefs};
_ ->
error
end;
get_prefs(LUser, LServer, odbc) ->
case ejabberd_odbc:sql_query(
LServer,
[<<"select def, always, never from archive_prefs ">>,
<<"where username='">>,
ejabberd_odbc:escape(LUser), <<"';">>]) of
{selected, _, [[SDefault, SAlways, SNever]]} ->
Default = erlang:binary_to_existing_atom(SDefault, utf8),
Always = ejabberd_odbc:decode_term(SAlways),
Never = ejabberd_odbc:decode_term(SNever),
{ok, #archive_prefs{us = {LUser, LServer},
default = Default,
always = Always,
never = Never}};
_ ->
error
end.
maybe_activate_mam(LUser, LServer) ->
ActivateOpt = gen_mod:get_module_opt(LServer, ?MODULE,
request_activates_archiving,
fun(B) when is_boolean(B) -> B end,
false),
case ActivateOpt of
true ->
Res = cache_tab:lookup(archive_prefs, {LUser, LServer},
fun() ->
get_prefs(LUser, LServer,
gen_mod:db_type(LServer,
?MODULE))
end),
case Res of
{ok, _Prefs} ->
ok;
error ->
Default = gen_mod:get_module_opt(LServer, ?MODULE, default,
fun(always) -> always;
(never) -> never;
(roster) -> roster
end, never),
write_prefs(LUser, LServer, LServer, Default, [], [])
end;
false ->
ok
end.
select_and_send(LServer, From, To, Start, End, With, RSM, IQ, MsgType) ->
DBType = case gen_mod:db_type(LServer, ?MODULE) of
odbc -> {odbc, LServer};
DB -> DB
end,
select_and_send(LServer, From, To, Start, End, With, RSM, IQ,
MsgType, DBType).
select_and_send(LServer, From, To, Start, End, With, RSM, IQ, MsgType, DBType) ->
{Msgs, IsComplete, Count} = select_and_start(LServer, From, To, Start, End,
With, RSM, MsgType, DBType),
SortedMsgs = lists:keysort(2, Msgs),
send(From, To, SortedMsgs, RSM, Count, IsComplete, IQ).
select_and_start(LServer, From, To, Start, End, With, RSM, MsgType, DBType) ->
case MsgType of
chat ->
select(LServer, From, Start, End, With, RSM, MsgType, DBType);
{groupchat, _Role, _MUCState} ->
select(LServer, To, Start, End, With, RSM, MsgType, DBType)
end.
select(_LServer, JidRequestor, Start, End, _With, RSM,
{groupchat, _Role, #state{config = #config{mam = false},
history = History}} = MsgType,
_DBType) ->
#lqueue{len = L, queue = Q} = History,
{Msgs0, _} =
lists:mapfoldl(
fun({Nick, Pkt, _HaveSubject, UTCDateTime, _Size}, I) ->
Now = datetime_to_now(UTCDateTime, I),
TS = now_to_usec(Now),
case match_interval(Now, Start, End) and
match_rsm(Now, RSM) of
true ->
{[{jlib:integer_to_binary(TS), TS,
msg_to_el(#archive_msg{
type = groupchat,
timestamp = Now,
peer = undefined,
nick = Nick,
packet = Pkt},
MsgType,
JidRequestor)}], I+1};
false ->
{[], I+1}
end
end, 0, queue:to_list(Q)),
Msgs = lists:flatten(Msgs0),
case RSM of
#rsm_in{max = Max, direction = before} ->
{NewMsgs, IsComplete} = filter_by_max(lists:reverse(Msgs), Max),
{NewMsgs, IsComplete, L};
#rsm_in{max = Max} ->
{NewMsgs, IsComplete} = filter_by_max(Msgs, Max),
{NewMsgs, IsComplete, L};
_ ->
{Msgs, true, L}
end;
select(_LServer, #jid{luser = LUser, lserver = LServer} = JidRequestor,
Start, End, With, RSM, MsgType, mnesia) ->
MS = make_matchspec(LUser, LServer, Start, End, With),
Msgs = mnesia:dirty_select(archive_msg, MS),
SortedMsgs = lists:keysort(#archive_msg.timestamp, Msgs),
{FilteredMsgs, IsComplete} = filter_by_rsm(SortedMsgs, RSM),
Count = length(Msgs),
{lists:map(
fun(Msg) ->
{Msg#archive_msg.id,
jlib:binary_to_integer(Msg#archive_msg.id),
msg_to_el(Msg, MsgType, JidRequestor)}
end, FilteredMsgs), IsComplete, Count};
select(LServer, #jid{luser = LUser} = JidRequestor,
Start, End, With, RSM, MsgType, {odbc, Host}) ->
User = case MsgType of
chat -> LUser;
{groupchat, _Role, _MUCState} -> jid:to_string(JidRequestor)
end,
{Query, CountQuery} = make_sql_query(User, LServer,
Start, End, With, RSM),
% TODO from XEP-0313 v0.2: "To conserve resources, a server MAY place a
% reasonable limit on how many stanzas may be pushed to a client in one
% request. If a query returns a number of stanzas greater than this limit
% and the client did not specify a limit using RSM then the server should
% return a policy-violation error to the client." We currently don't do this
% for v0.2 requests, but we do limit #rsm_in.max for v0.3 and newer.
case {ejabberd_odbc:sql_query(Host, Query),
ejabberd_odbc:sql_query(Host, CountQuery)} of
{{selected, _, Res}, {selected, _, [[Count]]}} ->
{Max, Direction} = case RSM of
#rsm_in{max = M, direction = D} -> {M, D};
_ -> {undefined, undefined}
end,
{Res1, IsComplete} =
if Max >= 0 andalso Max /= undefined andalso length(Res) > Max ->
if Direction == before ->
{lists:nthtail(1, Res), false};
true ->
{lists:sublist(Res, Max), false}
end;
true ->
{Res, true}
end,
{lists:flatmap(
fun([TS, XML, PeerBin, Kind, Nick]) ->
try
#xmlel{} = El = fxml_stream:parse_element(XML),
Now = usec_to_now(jlib:binary_to_integer(TS)),
PeerJid = jid:tolower(jid:from_string(PeerBin)),
T = case Kind of
<<"">> -> chat;
null -> chat;
_ -> jlib:binary_to_atom(Kind)
end,
[{TS, jlib:binary_to_integer(TS),
msg_to_el(#archive_msg{timestamp = Now,
packet = El,
type = T,
nick = Nick,
peer = PeerJid},
MsgType,
JidRequestor)}]
catch _:Err ->
?ERROR_MSG("failed to parse data from SQL: ~p. "
"The data was: "
"timestamp = ~s, xml = ~s, "
"peer = ~s, kind = ~s, nick = ~s",
[Err, TS, XML, PeerBin, Kind, Nick]),
[]
end
end, Res1), IsComplete, jlib:binary_to_integer(Count)};
_ ->
{[], false, 0}
end.
msg_to_el(#archive_msg{timestamp = TS, packet = Pkt1, nick = Nick, peer = Peer},
MsgType, #jid{lserver = LServer} = JidRequestor) ->
Pkt2 = maybe_update_from_to(Pkt1, JidRequestor, Peer, MsgType, Nick),
Pkt3 = #xmlel{name = <<"forwarded">>,
attrs = [{<<"xmlns">>, ?NS_FORWARD}],
children = [fxml:replace_tag_attr(
<<"xmlns">>, <<"jabber:client">>, Pkt2)]},
jlib:add_delay_info(Pkt3, LServer, TS).
maybe_update_from_to(#xmlel{children = Els} = Pkt, JidRequestor,
Peer, {groupchat, Role, _MUCState}, Nick) ->
Items = case Role of
moderator when Peer /= undefined ->
[#xmlel{name = <<"x">>,
attrs = [{<<"xmlns">>, ?NS_MUC_USER}],
children =
[#xmlel{name = <<"item">>,
attrs = [{<<"jid">>,
jid:to_string(Peer)}]}]}];
_ ->
[]
end,
Pkt1 = Pkt#xmlel{children = Items ++ Els},
Pkt2 = jlib:replace_from(jid:replace_resource(JidRequestor, Nick), Pkt1),
jlib:remove_attr(<<"to">>, Pkt2);
maybe_update_from_to(Pkt, _JidRequestor, _Peer, chat, _Nick) ->
Pkt.
is_bare_copy(#jid{luser = U, lserver = S, lresource = R}, To) ->
PrioRes = ejabberd_sm:get_user_present_resources(U, S),
MaxRes = case catch lists:max(PrioRes) of
{_Prio, Res} when is_binary(Res) ->
Res;
_ ->
undefined
end,
IsBareTo = case To of
#jid{lresource = <<"">>} ->
true;
#jid{lresource = LRes} ->
%% Unavailable resources are handled like bare JIDs.
lists:keyfind(LRes, 2, PrioRes) =:= false
end,
case {IsBareTo, R} of
{true, MaxRes} ->
?DEBUG("Recipient of message to bare JID has top priority: ~s@~s/~s",
[U, S, R]),
false;
{true, _R} ->
%% The message was sent to our bare JID, and we currently have
%% multiple resources with the same highest priority, so the session
%% manager routes the message to each of them. We store the message
%% only from the resource where R equals MaxRes.
?DEBUG("Additional recipient of message to bare JID: ~s@~s/~s",
[U, S, R]),
true;
{false, _R} ->
false
end.
send(From, To, Msgs, RSM, Count, IsComplete, #iq{sub_el = SubEl} = IQ) ->
QID = fxml:get_tag_attr_s(<<"queryid">>, SubEl),
NS = fxml:get_tag_attr_s(<<"xmlns">>, SubEl),
QIDAttr = if QID /= <<>> ->
[{<<"queryid">>, QID}];
true ->
[]
end,
CompleteAttr = if NS == ?NS_MAM_TMP ->
[];
NS == ?NS_MAM_0; NS == ?NS_MAM_1 ->
[{<<"complete">>, jlib:atom_to_binary(IsComplete)}]
end,
Els = lists:map(
fun({ID, _IDInt, El}) ->
#xmlel{name = <<"message">>,
children = [#xmlel{name = <<"result">>,
attrs = [{<<"xmlns">>, NS},
{<<"id">>, ID}|QIDAttr],
children = [El]}]}
end, Msgs),
RSMOut = make_rsm_out(Msgs, RSM, Count, QIDAttr ++ CompleteAttr, NS),
if NS == ?NS_MAM_TMP; NS == ?NS_MAM_1 ->
lists:foreach(
fun(El) ->
ejabberd_router:route(To, From, El)
end, Els),
IQ#iq{type = result, sub_el = RSMOut};
NS == ?NS_MAM_0 ->
ejabberd_router:route(
To, From, jlib:iq_to_xml(IQ#iq{type = result, sub_el = []})),
lists:foreach(
fun(El) ->
ejabberd_router:route(To, From, El)
end, Els),
ejabberd_router:route(
To, From, #xmlel{name = <<"message">>,
children = RSMOut}),
ignore
end.
make_rsm_out([], _, Count, Attrs, NS) ->
Tag = if NS == ?NS_MAM_TMP -> <<"query">>;
true -> <<"fin">>
end,
[#xmlel{name = Tag, attrs = [{<<"xmlns">>, NS}|Attrs],
children = jlib:rsm_encode(#rsm_out{count = Count})}];
make_rsm_out([{FirstID, _, _}|_] = Msgs, _, Count, Attrs, NS) ->
{LastID, _, _} = lists:last(Msgs),
Tag = if NS == ?NS_MAM_TMP -> <<"query">>;
true -> <<"fin">>
end,
[#xmlel{name = Tag, attrs = [{<<"xmlns">>, NS}|Attrs],
children = jlib:rsm_encode(
#rsm_out{first = FirstID, count = Count,
last = LastID})}].
filter_by_rsm(Msgs, none) ->
{Msgs, true};
filter_by_rsm(_Msgs, #rsm_in{max = Max}) when Max < 0 ->
{[], true};
filter_by_rsm(Msgs, #rsm_in{max = Max, direction = Direction, id = ID}) ->
NewMsgs = case Direction of
aft when ID /= <<"">> ->
lists:filter(
fun(#archive_msg{id = I}) ->
?BIN_GREATER_THAN(I, ID)
end, Msgs);
before when ID /= <<"">> ->
lists:foldl(
fun(#archive_msg{id = I} = Msg, Acc)
when ?BIN_LESS_THAN(I, ID) ->
[Msg|Acc];
(_, Acc) ->
Acc
end, [], Msgs);
before when ID == <<"">> ->
lists:reverse(Msgs);
_ ->
Msgs
end,
filter_by_max(NewMsgs, Max).
filter_by_max(Msgs, undefined) ->
{Msgs, true};
filter_by_max(Msgs, Len) when is_integer(Len), Len >= 0 ->
{lists:sublist(Msgs, Len), length(Msgs) =< Len};
filter_by_max(_Msgs, _Junk) ->
{[], true}.
limit_max(RSM, ?NS_MAM_TMP) ->
RSM; % XEP-0313 v0.2 doesn't require clients to support RSM.
limit_max(#rsm_in{max = Max} = RSM, _NS) when not is_integer(Max) ->
RSM#rsm_in{max = ?DEF_PAGE_SIZE};
limit_max(#rsm_in{max = Max} = RSM, _NS) when Max > ?MAX_PAGE_SIZE ->
RSM#rsm_in{max = ?MAX_PAGE_SIZE};
limit_max(RSM, _NS) ->
RSM.
match_interval(Now, Start, End) ->
(Now >= Start) and (Now =< End).
match_rsm(Now, #rsm_in{id = ID, direction = aft}) when ID /= <<"">> ->
Now1 = (catch usec_to_now(jlib:binary_to_integer(ID))),
Now > Now1;
match_rsm(Now, #rsm_in{id = ID, direction = before}) when ID /= <<"">> ->
Now1 = (catch usec_to_now(jlib:binary_to_integer(ID))),
Now < Now1;
match_rsm(_Now, _) ->
true.
make_matchspec(LUser, LServer, Start, End, {_, _, <<>>} = With) ->
ets:fun2ms(
fun(#archive_msg{timestamp = TS,
us = US,
bare_peer = BPeer} = Msg)
when Start =< TS, End >= TS,
US == {LUser, LServer},
BPeer == With ->
Msg
end);
make_matchspec(LUser, LServer, Start, End, {_, _, _} = With) ->
ets:fun2ms(
fun(#archive_msg{timestamp = TS,
us = US,
peer = Peer} = Msg)
when Start =< TS, End >= TS,
US == {LUser, LServer},
Peer == With ->
Msg
end);
make_matchspec(LUser, LServer, Start, End, none) ->
ets:fun2ms(
fun(#archive_msg{timestamp = TS,
us = US,
peer = Peer} = Msg)
when Start =< TS, End >= TS,
US == {LUser, LServer} ->
Msg
end).
make_sql_query(User, _LServer, Start, End, With, RSM) ->
{Max, Direction, ID} = case RSM of
#rsm_in{} ->
{RSM#rsm_in.max,
RSM#rsm_in.direction,
RSM#rsm_in.id};
none ->
{none, none, <<>>}
end,
LimitClause = if is_integer(Max), Max >= 0 ->
[<<" limit ">>, jlib:integer_to_binary(Max+1)];
true ->
[]
end,
WithClause = case With of
{text, <<>>} ->
[];
{text, Txt} ->
[<<" and match (txt) against ('">>,
ejabberd_odbc:escape(Txt), <<"')">>];
{_, _, <<>>} ->
[<<" and bare_peer='">>,
ejabberd_odbc:escape(jid:to_string(With)),
<<"'">>];
{_, _, _} ->
[<<" and peer='">>,
ejabberd_odbc:escape(jid:to_string(With)),
<<"'">>];
none ->
[]
end,
PageClause = case catch jlib:binary_to_integer(ID) of
I when is_integer(I), I >= 0 ->
case Direction of
before ->
[<<" AND timestamp < ">>, ID];
aft ->
[<<" AND timestamp > ">>, ID];
_ ->
[]
end;
_ ->
[]
end,
StartClause = case Start of
{_, _, _} ->
[<<" and timestamp >= ">>,
jlib:integer_to_binary(now_to_usec(Start))];
_ ->
[]
end,
EndClause = case End of
{_, _, _} ->
[<<" and timestamp <= ">>,
jlib:integer_to_binary(now_to_usec(End))];
_ ->
[]
end,
SUser = ejabberd_odbc:escape(User),
Query = [<<"SELECT timestamp, xml, peer, kind, nick"
" FROM archive WHERE username='">>,
SUser, <<"'">>, WithClause, StartClause, EndClause,
PageClause],
QueryPage =
case Direction of
before ->
% ID can be empty because of
% XEP-0059: Result Set Management
% 2.5 Requesting the Last Page in a Result Set
[<<"SELECT timestamp, xml, peer, kind, nick FROM (">>, Query,
<<" ORDER BY timestamp DESC ">>,
LimitClause, <<") AS t ORDER BY timestamp ASC;">>];
_ ->
[Query, <<" ORDER BY timestamp ASC ">>,
LimitClause, <<";">>]
end,
{QueryPage,
[<<"SELECT COUNT(*) FROM archive WHERE username='">>,
SUser, <<"'">>, WithClause, StartClause, EndClause, <<";">>]}.
now_to_usec({MSec, Sec, USec}) ->
(MSec*1000000 + Sec)*1000000 + USec.
usec_to_now(Int) ->
Secs = Int div 1000000,
USec = Int rem 1000000,
MSec = Secs div 1000000,
Sec = Secs rem 1000000,
{MSec, Sec, USec}.
datetime_to_now(DateTime, USecs) ->
Seconds = calendar:datetime_to_gregorian_seconds(DateTime) -
calendar:datetime_to_gregorian_seconds({{1970, 1, 1}, {0, 0, 0}}),
{Seconds div 1000000, Seconds rem 1000000, USecs}.
get_jids(Els) ->
lists:flatmap(
fun(#xmlel{name = <<"jid">>} = El) ->
J = jid:from_string(fxml:get_tag_cdata(El)),
[jid:tolower(jid:remove_resource(J)),
jid:tolower(J)];
(_) ->
[]
end, Els).
update(LServer, Table, Fields, Vals, Where) ->
UPairs = lists:zipwith(fun (A, B) ->
<<A/binary, "='", B/binary, "'">>
end,
Fields, Vals),
case ejabberd_odbc:sql_query(LServer,
[<<"update ">>, Table, <<" set ">>,
join(UPairs, <<", ">>), <<" where ">>, Where,
<<";">>])
of
{updated, 1} -> {updated, 1};
_ ->
ejabberd_odbc:sql_query(LServer,
[<<"insert into ">>, Table, <<"(">>,
join(Fields, <<", ">>), <<") values ('">>,
join(Vals, <<"', '">>), <<"');">>])
end.
%% Almost a copy of string:join/2.
join([], _Sep) -> [];
join([H | T], Sep) -> [H, [[Sep, X] || X <- T]].
get_commands_spec() ->
[#ejabberd_commands{name = delete_old_mam_messages, tags = [purge],
desc = "Delete MAM messages older than DAYS",
longdesc = "Valid message TYPEs: "
"\"chat\", \"groupchat\", \"all\".",
module = ?MODULE, function = delete_old_messages,
args = [{type, binary}, {days, integer}],
result = {res, rescode}}].
mod_opt_type(assume_mam_usage) ->
fun(if_enabled) -> if_enabled;
(on_request) -> on_request;
(never) -> never
end;
mod_opt_type(cache_life_time) ->
fun (I) when is_integer(I), I > 0 -> I end;
mod_opt_type(cache_size) ->
fun (I) when is_integer(I), I > 0 -> I end;
mod_opt_type(db_type) -> fun gen_mod:v_db/1;
mod_opt_type(default) ->
fun (always) -> always;
(never) -> never;
(roster) -> roster
end;
mod_opt_type(iqdisc) -> fun gen_iq_handler:check_type/1;
mod_opt_type(request_activates_archiving) ->
fun (B) when is_boolean(B) -> B end;
mod_opt_type(_) ->
[assume_mam_usage, cache_life_time, cache_size, db_type, default, iqdisc,
request_activates_archiving].
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