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

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%%%----------------------------------------------------------------------
%%% File : mod_offline.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Store and manage offline messages.
%%% Created : 5 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2017 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_offline).
-author('alexey@process-one.net').
-protocol({xep, 13, '1.2'}).
-protocol({xep, 22, '1.4'}).
-protocol({xep, 23, '1.3'}).
-protocol({xep, 160, '1.0'}).
-protocol({xep, 334, '0.2'}).
-define(GEN_SERVER, p1_server).
-behaviour(?GEN_SERVER).
-behaviour(gen_mod).
-export([start/2,
start_link/2,
stop/1,
store_packet/4,
store_offline_msg/5,
resend_offline_messages/2,
c2s_self_presence/1,
get_sm_features/5,
get_sm_identity/5,
get_sm_items/5,
get_info/5,
handle_offline_query/1,
remove_expired_messages/1,
remove_old_messages/2,
remove_user/2,
import_info/0,
import_start/2,
import/5,
export/1,
get_queue_length/2,
count_offline_messages/2,
get_offline_els/2,
find_x_expire/2,
c2s_handle_info/2,
c2s_copy_session/2,
webadmin_page/3,
webadmin_user/4,
webadmin_user_parse_query/5]).
-export([init/1, handle_call/3, handle_cast/2,
handle_info/2, terminate/2, code_change/3,
mod_opt_type/1, depends/2]).
-deprecated({get_queue_length,2}).
-include("ejabberd.hrl").
-include("logger.hrl").
-include("xmpp.hrl").
-include("ejabberd_http.hrl").
-include("ejabberd_web_admin.hrl").
-include("mod_offline.hrl").
-define(PROCNAME, ejabberd_offline).
-define(OFFLINE_TABLE_LOCK_THRESHOLD, 1000).
%% default value for the maximum number of user messages
-define(MAX_USER_MESSAGES, infinity).
-type us() :: {binary(), binary()}.
-type c2s_state() :: ejabberd_c2s:state().
-callback init(binary(), gen_mod:opts()) -> any().
-callback import(#offline_msg{}) -> ok.
-callback store_messages(binary(), us(), [#offline_msg{}],
non_neg_integer(), non_neg_integer()) ->
{atomic, any()}.
-callback pop_messages(binary(), binary()) ->
{atomic, [#offline_msg{}]} | {aborted, any()}.
-callback remove_expired_messages(binary()) -> {atomic, any()}.
-callback remove_old_messages(non_neg_integer(), binary()) -> {atomic, any()}.
-callback remove_user(binary(), binary()) -> {atomic, any()}.
-callback read_message_headers(binary(), binary()) ->
[{non_neg_integer(), jid(), jid(), undefined | erlang:timestamp(), xmlel()}].
-callback read_message(binary(), binary(), non_neg_integer()) ->
{ok, #offline_msg{}} | error.
-callback remove_message(binary(), binary(), non_neg_integer()) -> ok | {error, any()}.
-callback read_all_messages(binary(), binary()) -> [#offline_msg{}].
-callback remove_all_messages(binary(), binary()) -> {atomic, any()}.
-callback count_messages(binary(), binary()) -> non_neg_integer().
start_link(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
?GEN_SERVER:start_link({local, Proc}, ?MODULE,
[Host, Opts], []).
start(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
ChildSpec = {Proc, {?MODULE, start_link, [Host, Opts]},
transient, 1000, worker, [?MODULE]},
supervisor:start_child(ejabberd_sup, ChildSpec).
stop(Host) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
supervisor:terminate_child(ejabberd_sup, Proc),
supervisor:delete_child(ejabberd_sup, Proc),
ok.
depends(_Host, _Opts) ->
[].
%%====================================================================
%% gen_server callbacks
%%====================================================================
init([Host, Opts]) ->
Mod = gen_mod:db_mod(Host, Opts, ?MODULE),
Mod:init(Host, Opts),
IQDisc = gen_mod:get_opt(iqdisc, Opts, fun gen_iq_handler:check_type/1,
no_queue),
ejabberd_hooks:add(offline_message_hook, Host, ?MODULE,
store_packet, 50),
ejabberd_hooks:add(c2s_self_presence, Host, ?MODULE, c2s_self_presence, 50),
ejabberd_hooks:add(remove_user, Host,
?MODULE, remove_user, 50),
ejabberd_hooks:add(disco_sm_features, Host,
?MODULE, get_sm_features, 50),
ejabberd_hooks:add(disco_local_features, Host,
?MODULE, get_sm_features, 50),
ejabberd_hooks:add(disco_sm_identity, Host,
?MODULE, get_sm_identity, 50),
ejabberd_hooks:add(disco_sm_items, Host,
?MODULE, get_sm_items, 50),
ejabberd_hooks:add(disco_info, Host, ?MODULE, get_info, 50),
ejabberd_hooks:add(c2s_handle_info, Host, ?MODULE, c2s_handle_info, 50),
ejabberd_hooks:add(c2s_copy_session, Host, ?MODULE, c2s_copy_session, 50),
ejabberd_hooks:add(webadmin_page_host, Host,
?MODULE, webadmin_page, 50),
ejabberd_hooks:add(webadmin_user, Host,
?MODULE, webadmin_user, 50),
ejabberd_hooks:add(webadmin_user_parse_query, Host,
?MODULE, webadmin_user_parse_query, 50),
gen_iq_handler:add_iq_handler(ejabberd_sm, Host, ?NS_FLEX_OFFLINE,
?MODULE, handle_offline_query, IQDisc),
AccessMaxOfflineMsgs =
gen_mod:get_opt(access_max_user_messages, Opts,
fun acl:shaper_rules_validator/1,
max_user_offline_messages),
{ok,
#state{host = Host,
access_max_offline_messages = AccessMaxOfflineMsgs}}.
handle_call(stop, _From, State) ->
{stop, normal, ok, State}.
handle_cast(_Msg, State) -> {noreply, State}.
handle_info(#offline_msg{us = UserServer} = Msg, State) ->
#state{host = Host,
access_max_offline_messages = AccessMaxOfflineMsgs} = State,
DBType = gen_mod:db_type(Host, ?MODULE),
Msgs = receive_all(UserServer, [Msg], DBType),
Len = length(Msgs),
MaxOfflineMsgs = get_max_user_messages(AccessMaxOfflineMsgs,
UserServer, Host),
store_offline_msg(Host, UserServer, Msgs, Len, MaxOfflineMsgs),
{noreply, State};
handle_info(_Info, State) ->
?ERROR_MSG("got unexpected info: ~p", [_Info]),
{noreply, State}.
terminate(_Reason, State) ->
Host = State#state.host,
ejabberd_hooks:delete(offline_message_hook, Host,
?MODULE, store_packet, 50),
ejabberd_hooks:delete(c2s_self_presence, Host, ?MODULE, c2s_self_presence, 50),
ejabberd_hooks:delete(remove_user, Host, ?MODULE,
remove_user, 50),
ejabberd_hooks:delete(disco_sm_features, Host, ?MODULE, get_sm_features, 50),
ejabberd_hooks:delete(disco_local_features, Host, ?MODULE, get_sm_features, 50),
ejabberd_hooks:delete(disco_sm_identity, Host, ?MODULE, get_sm_identity, 50),
ejabberd_hooks:delete(disco_sm_items, Host, ?MODULE, get_sm_items, 50),
ejabberd_hooks:delete(disco_info, Host, ?MODULE, get_info, 50),
ejabberd_hooks:delete(c2s_handle_info, Host, ?MODULE, c2s_handle_info, 50),
ejabberd_hooks:delete(c2s_copy_session, Host, ?MODULE, c2s_copy_session, 50),
ejabberd_hooks:delete(webadmin_page_host, Host,
?MODULE, webadmin_page, 50),
ejabberd_hooks:delete(webadmin_user, Host,
?MODULE, webadmin_user, 50),
ejabberd_hooks:delete(webadmin_user_parse_query, Host,
?MODULE, webadmin_user_parse_query, 50),
gen_iq_handler:remove_iq_handler(ejabberd_sm, Host, ?NS_FLEX_OFFLINE),
ok.
code_change(_OldVsn, State, _Extra) -> {ok, State}.
store_offline_msg(Host, US, Msgs, Len, MaxOfflineMsgs) ->
Mod = gen_mod:db_mod(Host, ?MODULE),
case Mod:store_messages(Host, US, Msgs, Len, MaxOfflineMsgs) of
{atomic, discard} ->
discard_warn_sender(Msgs);
_ ->
ok
end.
get_max_user_messages(AccessRule, {User, Server}, Host) ->
case acl:match_rule(
Host, AccessRule, jid:make(User, Server, <<"">>)) of
Max when is_integer(Max) -> Max;
infinity -> infinity;
_ -> ?MAX_USER_MESSAGES
end.
receive_all(US, Msgs, DBType) ->
receive
#offline_msg{us = US} = Msg ->
receive_all(US, [Msg | Msgs], DBType)
after 0 ->
case DBType of
mnesia -> Msgs;
sql -> lists:reverse(Msgs);
riak -> Msgs
end
end.
get_sm_features(Acc, _From, _To, <<"">>, _Lang) ->
Feats = case Acc of
{result, I} -> I;
_ -> []
end,
{result, Feats ++ [?NS_FEATURE_MSGOFFLINE, ?NS_FLEX_OFFLINE]};
get_sm_features(_Acc, _From, _To, ?NS_FEATURE_MSGOFFLINE, _Lang) ->
%% override all lesser features...
{result, []};
get_sm_features(_Acc, #jid{luser = U, lserver = S}, #jid{luser = U, lserver = S},
?NS_FLEX_OFFLINE, _Lang) ->
{result, [?NS_FLEX_OFFLINE]};
get_sm_features(Acc, _From, _To, _Node, _Lang) ->
Acc.
get_sm_identity(Acc, #jid{luser = U, lserver = S}, #jid{luser = U, lserver = S},
?NS_FLEX_OFFLINE, _Lang) ->
[#identity{category = <<"automation">>,
type = <<"message-list">>}|Acc];
get_sm_identity(Acc, _From, _To, _Node, _Lang) ->
Acc.
get_sm_items(_Acc, #jid{luser = U, lserver = S} = JID,
#jid{luser = U, lserver = S},
?NS_FLEX_OFFLINE, _Lang) ->
ejabberd_sm:route(JID, {resend_offline, false}),
Mod = gen_mod:db_mod(S, ?MODULE),
Hdrs = Mod:read_message_headers(U, S),
BareJID = jid:remove_resource(JID),
{result, lists:map(
fun({Seq, From, _To, _TS, _El}) ->
Node = integer_to_binary(Seq),
#disco_item{jid = BareJID,
node = Node,
name = jid:to_string(From)}
end, Hdrs)};
get_sm_items(Acc, _From, _To, _Node, _Lang) ->
Acc.
-spec get_info([xdata()], binary(), module(), binary(), binary()) -> [xdata()];
([xdata()], jid(), jid(), binary(), binary()) -> [xdata()].
get_info(_Acc, #jid{luser = U, lserver = S} = JID,
#jid{luser = U, lserver = S}, ?NS_FLEX_OFFLINE, Lang) ->
ejabberd_sm:route(JID, {resend_offline, false}),
[#xdata{type = result,
fields = flex_offline:encode(
[{number_of_messages, count_offline_messages(U, S)}],
fun(T) -> translate:translate(Lang, T) end)}];
get_info(Acc, _From, _To, _Node, _Lang) ->
Acc.
-spec c2s_handle_info(c2s_state(), term()) -> c2s_state().
c2s_handle_info(State, {resend_offline, Flag}) ->
{stop, State#{resend_offline => Flag}};
c2s_handle_info(State, _) ->
State.
-spec c2s_copy_session(c2s_state(), c2s_state()) -> c2s_state().
c2s_copy_session(State, #{resend_offline := Flag}) ->
State#{resend_offline => Flag};
c2s_copy_session(State, _) ->
State.
-spec handle_offline_query(iq()) -> iq().
handle_offline_query(#iq{from = #jid{luser = U1, lserver = S1},
to = #jid{luser = U2, lserver = S2},
lang = Lang,
sub_els = [#offline{}]} = IQ)
when {U1, S1} /= {U2, S2} ->
Txt = <<"Query to another users is forbidden">>,
xmpp:make_error(IQ, xmpp:err_forbidden(Txt, Lang));
handle_offline_query(#iq{from = #jid{luser = U, lserver = S} = From,
to = #jid{luser = U, lserver = S} = _To,
type = Type, lang = Lang,
sub_els = [#offline{} = Offline]} = IQ) ->
case {Type, Offline} of
{get, #offline{fetch = true, items = [], purge = false}} ->
%% TODO: report database errors
handle_offline_fetch(From),
xmpp:make_iq_result(IQ);
{get, #offline{fetch = false, items = [_|_] = Items, purge = false}} ->
case handle_offline_items_view(From, Items) of
true -> xmpp:make_iq_result(IQ);
false -> xmpp:make_error(IQ, xmpp:err_item_not_found())
end;
{set, #offline{fetch = false, items = [], purge = true}} ->
case delete_all_msgs(U, S) of
{atomic, ok} ->
xmpp:make_iq_result(IQ);
_Err ->
Txt = <<"Database failure">>,
xmpp:make_error(IQ, xmpp:err_internal_server_error(Txt, Lang))
end;
{set, #offline{fetch = false, items = [_|_] = Items, purge = false}} ->
case handle_offline_items_remove(From, Items) of
true -> xmpp:make_iq_result(IQ);
false -> xmpp:make_error(IQ, xmpp:err_item_not_found())
end;
_ ->
xmpp:make_error(IQ, xmpp:err_bad_request())
end;
handle_offline_query(#iq{lang = Lang} = IQ) ->
Txt = <<"No module is handling this query">>,
xmpp:make_error(IQ, xmpp:err_service_unavailable(Txt, Lang)).
-spec handle_offline_items_view(jid(), [offline_item()]) -> boolean().
handle_offline_items_view(JID, Items) ->
{U, S, R} = jid:tolower(JID),
lists:foldl(
fun(#offline_item{node = Node, action = view}, Acc) ->
case fetch_msg_by_node(JID, Node) of
{ok, OfflineMsg} ->
case offline_msg_to_route(S, OfflineMsg) of
{route, From, To, El} ->
NewEl = set_offline_tag(El, Node),
case ejabberd_sm:get_session_pid(U, S, R) of
Pid when is_pid(Pid) ->
Pid ! {route, From, To, NewEl};
none ->
ok
end,
Acc or true;
error ->
Acc or false
end;
error ->
Acc or false
end
end, false, Items).
-spec handle_offline_items_remove(jid(), [offline_item()]) -> boolean().
handle_offline_items_remove(JID, Items) ->
lists:foldl(
fun(#offline_item{node = Node, action = remove}, Acc) ->
Acc or remove_msg_by_node(JID, Node)
end, false, Items).
-spec set_offline_tag(message(), binary()) -> message().
set_offline_tag(Msg, Node) ->
xmpp:set_subtag(Msg, #offline{items = [#offline_item{node = Node}]}).
-spec handle_offline_fetch(jid()) -> ok.
handle_offline_fetch(#jid{luser = U, lserver = S} = JID) ->
ejabberd_sm:route(JID, {resend_offline, false}),
lists:foreach(
fun({Node, El}) ->
El1 = set_offline_tag(El, Node),
From = xmpp:get_from(El1),
To = xmpp:get_to(El1),
ejabberd_router:route(From, To, El1)
end, read_messages(U, S)).
-spec fetch_msg_by_node(jid(), binary()) -> error | {ok, #offline_msg{}}.
fetch_msg_by_node(To, Seq) ->
case catch binary_to_integer(Seq) of
I when is_integer(I), I >= 0 ->
LUser = To#jid.luser,
LServer = To#jid.lserver,
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:read_message(LUser, LServer, I);
_ ->
error
end.
-spec remove_msg_by_node(jid(), binary()) -> boolean().
remove_msg_by_node(To, Seq) ->
case catch binary_to_integer(Seq) of
I when is_integer(I), I>= 0 ->
LUser = To#jid.luser,
LServer = To#jid.lserver,
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:remove_message(LUser, LServer, I),
true;
_ ->
false
end.
-spec need_to_store(binary(), message()) -> boolean().
need_to_store(_LServer, #message{type = error}) -> false;
need_to_store(LServer, #message{type = Type} = Packet) ->
case xmpp:has_subtag(Packet, #offline{}) of
false ->
case check_store_hint(Packet) of
store ->
true;
no_store ->
false;
none when Type == headline; Type == groupchat ->
false;
none ->
case gen_mod:get_module_opt(
LServer, ?MODULE, store_empty_body,
fun(V) when is_boolean(V) -> V;
(unless_chat_state) -> unless_chat_state
end,
unless_chat_state) of
true ->
true;
false ->
Packet#message.body /= [];
unless_chat_state ->
not xmpp_util:is_standalone_chat_state(Packet)
end
end;
true ->
false
end.
-spec store_packet(any(), jid(), jid(), message()) -> any().
store_packet(Acc, From, To, Packet) ->
case need_to_store(To#jid.lserver, Packet) of
true ->
case check_event(From, To, Packet) of
true ->
#jid{luser = LUser, lserver = LServer} = To,
case ejabberd_hooks:run_fold(store_offline_message, LServer,
Packet, [From, To]) of
drop ->
Acc;
NewPacket ->
TimeStamp = p1_time_compat:timestamp(),
Expire = find_x_expire(TimeStamp, NewPacket),
gen_mod:get_module_proc(To#jid.lserver, ?PROCNAME) !
#offline_msg{us = {LUser, LServer},
timestamp = TimeStamp,
expire = Expire,
from = From,
to = To,
packet = NewPacket},
offlined
end;
_ -> Acc
end;
false -> Acc
end.
-spec check_store_hint(message()) -> store | no_store | none.
check_store_hint(Packet) ->
case has_store_hint(Packet) of
true ->
store;
false ->
case has_no_store_hint(Packet) of
true ->
no_store;
false ->
none
end
end.
-spec has_store_hint(message()) -> boolean().
has_store_hint(Packet) ->
xmpp:has_subtag(Packet, #hint{type = 'store'}).
-spec has_no_store_hint(message()) -> boolean().
has_no_store_hint(Packet) ->
xmpp:has_subtag(Packet, #hint{type = 'no-store'})
orelse
xmpp:has_subtag(Packet, #hint{type = 'no-storage'}).
%% Check if the packet has any content about XEP-0022
-spec check_event(jid(), jid(), message()) -> boolean().
check_event(From, To, #message{id = ID} = Msg) ->
case xmpp:get_subtag(Msg, #xevent{}) of
false ->
true;
#xevent{id = undefined, offline = false} ->
true;
#xevent{id = undefined, offline = true} ->
NewMsg = Msg#message{sub_els = [#xevent{id = ID, offline = true}]},
ejabberd_router:route(To, From, xmpp:set_from_to(NewMsg, To, From)),
true;
_ ->
false
end.
-spec find_x_expire(erlang:timestamp(), message()) -> erlang:timestamp() | never.
find_x_expire(TimeStamp, Msg) ->
case xmpp:get_subtag(Msg, #expire{}) of
#expire{seconds = Int} ->
{MegaSecs, Secs, MicroSecs} = TimeStamp,
S = MegaSecs * 1000000 + Secs + Int,
MegaSecs1 = S div 1000000,
Secs1 = S rem 1000000,
{MegaSecs1, Secs1, MicroSecs};
false ->
never
end.
resend_offline_messages(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
Mod = gen_mod:db_mod(LServer, ?MODULE),
case Mod:pop_messages(LUser, LServer) of
{ok, Rs} ->
lists:foreach(
fun(R) ->
case offline_msg_to_route(LServer, R) of
error -> ok;
RouteMsg -> ejabberd_sm ! RouteMsg
end
end, lists:keysort(#offline_msg.timestamp, Rs));
_ -> ok
end.
c2s_self_presence({_Pres, #{resend_offline := false}} = Acc) ->
Acc;
c2s_self_presence({#presence{type = available} = NewPres, State} = Acc) ->
NewPrio = get_priority_from_presence(NewPres),
LastPrio = case maps:get(pres_last, State, error) of
error -> -1;
LastPres -> get_priority_from_presence(LastPres)
end,
if LastPrio < 0 andalso NewPrio >= 0 ->
route_offline_messages(State);
true ->
ok
end,
Acc;
c2s_self_presence(Acc) ->
Acc.
-spec route_offline_messages(c2s_state()) -> ok.
route_offline_messages(#{jid := #jid{luser = LUser, lserver = LServer}} = State) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
case Mod:pop_messages(LUser, LServer) of
{ok, OffMsgs} ->
lists:foreach(
fun(OffMsg) ->
route_offline_message(State, OffMsg)
end, OffMsgs);
_ ->
ok
end.
-spec route_offline_message(c2s_state(), #offline_msg{}) -> ok.
route_offline_message(#{lserver := LServer} = State,
#offline_msg{expire = Expire} = OffMsg) ->
case offline_msg_to_route(LServer, OffMsg) of
error ->
ok;
{route, From, To, Msg} ->
case is_message_expired(Expire, Msg) of
true ->
ok;
false ->
case privacy_check_packet(State, Msg, in) of
allow -> ejabberd_router:route(From, To, Msg);
false -> ok
end
end
end.
-spec is_message_expired(erlang:timestamp() | never, message()) -> boolean().
is_message_expired(Expire, Msg) ->
TS = p1_time_compat:timestamp(),
Expire1 = case Expire of
undefined -> find_x_expire(TS, Msg);
_ -> Expire
end,
Expire1 /= never andalso Expire1 =< TS.
-spec privacy_check_packet(c2s_state(), stanza(), in | out) -> allow | deny.
privacy_check_packet(#{lserver := LServer} = State, Pkt, Dir) ->
ejabberd_hooks:run_fold(privacy_check_packet,
LServer, allow, [State, Pkt, Dir]).
remove_expired_messages(Server) ->
LServer = jid:nameprep(Server),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:remove_expired_messages(LServer).
remove_old_messages(Days, Server) ->
LServer = jid:nameprep(Server),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:remove_old_messages(Days, LServer).
-spec remove_user(binary(), binary()) -> ok.
remove_user(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:remove_user(LUser, LServer),
ok.
%% Helper functions:
%% Warn senders that their messages have been discarded:
discard_warn_sender(Msgs) ->
lists:foreach(
fun(#offline_msg{from = From, to = To, packet = Packet}) ->
ErrText = <<"Your contact offline message queue is "
"full. The message has been discarded.">>,
Lang = xmpp:get_lang(Packet),
Err = xmpp:err_resource_constraint(ErrText, Lang),
ejabberd_router:route_error(To, From, Packet, Err)
end, Msgs).
webadmin_page(_, Host,
#request{us = _US, path = [<<"user">>, U, <<"queue">>],
q = Query, lang = Lang} =
_Request) ->
Res = user_queue(U, Host, Query, Lang), {stop, Res};
webadmin_page(Acc, _, _) -> Acc.
get_offline_els(LUser, LServer) ->
[Packet || {_Seq, Packet} <- read_messages(LUser, LServer)].
-spec offline_msg_to_route(binary(), #offline_msg{}) ->
{route, jid(), jid(), message()} | error.
offline_msg_to_route(LServer, #offline_msg{from = From, to = To} = R) ->
try xmpp:decode(R#offline_msg.packet, ?NS_CLIENT, [ignore_els]) of
Pkt ->
Pkt1 = xmpp:set_from_to(Pkt, From, To),
Pkt2 = add_delay_info(Pkt1, LServer, R#offline_msg.timestamp),
{route, From, To, Pkt2}
catch _:{xmpp_codec, Why} ->
?ERROR_MSG("failed to decode packet ~p of user ~s: ~s",
[R#offline_msg.packet, jid:to_string(To),
xmpp:format_error(Why)]),
error
end.
-spec read_messages(binary(), binary()) -> [{binary(), message()}].
read_messages(LUser, LServer) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
lists:flatmap(
fun({Seq, From, To, TS, El}) ->
Node = integer_to_binary(Seq),
try xmpp:decode(El, ?NS_CLIENT, [ignore_els]) of
Pkt ->
Node = integer_to_binary(Seq),
Pkt1 = add_delay_info(Pkt, LServer, TS),
Pkt2 = xmpp:set_from_to(Pkt1, From, To),
[{Node, Pkt2}]
catch _:{xmpp_codec, Why} ->
?ERROR_MSG("failed to decode packet ~p "
"of user ~s: ~s",
[El, jid:to_string(To),
xmpp:format_error(Why)]),
[]
end
end, Mod:read_message_headers(LUser, LServer)).
format_user_queue(Hdrs) ->
lists:map(
fun({Seq, From, To, TS, El}) ->
ID = integer_to_binary(Seq),
FPacket = ejabberd_web_admin:pretty_print_xml(El),
SFrom = jid:to_string(From),
STo = jid:to_string(To),
Time = case TS of
undefined ->
Stamp = fxml:get_path_s(El, [{elem, <<"delay">>},
{attr, <<"stamp">>}]),
try xmpp_util:decode_timestamp(Stamp) of
{_, _, _} = Now -> format_time(Now)
catch _:_ ->
<<"">>
end;
{_, _, _} = Now ->
format_time(Now)
end,
?XE(<<"tr">>,
[?XAE(<<"td">>, [{<<"class">>, <<"valign">>}],
[?INPUT(<<"checkbox">>, <<"selected">>, ID)]),
?XAC(<<"td">>, [{<<"class">>, <<"valign">>}], Time),
?XAC(<<"td">>, [{<<"class">>, <<"valign">>}], SFrom),
?XAC(<<"td">>, [{<<"class">>, <<"valign">>}], STo),
?XAE(<<"td">>, [{<<"class">>, <<"valign">>}],
[?XC(<<"pre">>, FPacket)])])
end, Hdrs).
format_time(Now) ->
{{Year, Month, Day}, {Hour, Minute, Second}} = calendar:now_to_local_time(Now),
str:format("~w-~.2.0w-~.2.0w ~.2.0w:~.2.0w:~.2.0w",
[Year, Month, Day, Hour, Minute, Second]).
user_queue(User, Server, Query, Lang) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
US = {LUser, LServer},
Mod = gen_mod:db_mod(LServer, ?MODULE),
Res = user_queue_parse_query(LUser, LServer, Query),
HdrsAll = Mod:read_message_headers(LUser, LServer),
Hdrs = get_messages_subset(US, Server, HdrsAll),
FMsgs = format_user_queue(Hdrs),
[?XC(<<"h1">>,
(str:format(?T(<<"~s's Offline Messages Queue">>),
[us_to_list(US)])))]
++
case Res of
ok -> [?XREST(<<"Submitted">>)];
nothing -> []
end
++
[?XAE(<<"form">>,
[{<<"action">>, <<"">>}, {<<"method">>, <<"post">>}],
[?XE(<<"table">>,
[?XE(<<"thead">>,
[?XE(<<"tr">>,
[?X(<<"td">>), ?XCT(<<"td">>, <<"Time">>),
?XCT(<<"td">>, <<"From">>),
?XCT(<<"td">>, <<"To">>),
?XCT(<<"td">>, <<"Packet">>)])]),
?XE(<<"tbody">>,
if FMsgs == [] ->
[?XE(<<"tr">>,
[?XAC(<<"td">>, [{<<"colspan">>, <<"4">>}],
<<" ">>)])];
true -> FMsgs
end)]),
?BR,
?INPUTT(<<"submit">>, <<"delete">>,
<<"Delete Selected">>)])].
user_queue_parse_query(LUser, LServer, Query) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
case lists:keysearch(<<"delete">>, 1, Query) of
{value, _} ->
case lists:keyfind(<<"selected">>, 1, Query) of
{_, Seq} ->
case catch binary_to_integer(Seq) of
I when is_integer(I), I>=0 ->
Mod:remove_message(LUser, LServer, I),
ok;
_ ->
nothing
end;
false ->
nothing
end;
_ ->
nothing
end.
us_to_list({User, Server}) ->
jid:to_string({User, Server, <<"">>}).
get_queue_length(LUser, LServer) ->
count_offline_messages(LUser, LServer).
get_messages_subset(User, Host, MsgsAll) ->
Access = gen_mod:get_module_opt(Host, ?MODULE, access_max_user_messages,
fun(A) when is_atom(A) -> A end,
max_user_offline_messages),
MaxOfflineMsgs = case get_max_user_messages(Access,
User, Host)
of
Number when is_integer(Number) -> Number;
_ -> 100
end,
Length = length(MsgsAll),
get_messages_subset2(MaxOfflineMsgs, Length, MsgsAll).
get_messages_subset2(Max, Length, MsgsAll) when Length =< Max * 2 ->
MsgsAll;
get_messages_subset2(Max, Length, MsgsAll) ->
FirstN = Max,
{MsgsFirstN, Msgs2} = lists:split(FirstN, MsgsAll),
MsgsLastN = lists:nthtail(Length - FirstN - FirstN,
Msgs2),
NoJID = jid:make(<<"...">>, <<"...">>, <<"">>),
Seq = <<"0">>,
IntermediateMsg = #xmlel{name = <<"...">>, attrs = [],
children = []},
MsgsFirstN ++ [{Seq, NoJID, NoJID, IntermediateMsg}] ++ MsgsLastN.
webadmin_user(Acc, User, Server, Lang) ->
QueueLen = count_offline_messages(jid:nodeprep(User),
jid:nameprep(Server)),
FQueueLen = [?AC(<<"queue/">>,
(integer_to_binary(QueueLen)))],
Acc ++
[?XCT(<<"h3">>, <<"Offline Messages:">>)] ++
FQueueLen ++
[?C(<<" ">>),
?INPUTT(<<"submit">>, <<"removealloffline">>,
<<"Remove All Offline Messages">>)].
-spec delete_all_msgs(binary(), binary()) -> {atomic, any()}.
delete_all_msgs(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:remove_all_messages(LUser, LServer).
webadmin_user_parse_query(_, <<"removealloffline">>,
User, Server, _Query) ->
case delete_all_msgs(User, Server) of
{aborted, Reason} ->
?ERROR_MSG("Failed to remove offline messages: ~p",
[Reason]),
{stop, error};
{atomic, ok} ->
?INFO_MSG("Removed all offline messages for ~s@~s",
[User, Server]),
{stop, ok}
end;
webadmin_user_parse_query(Acc, _Action, _User, _Server,
_Query) ->
Acc.
%% Returns as integer the number of offline messages for a given user
-spec count_offline_messages(binary(), binary()) -> non_neg_integer().
count_offline_messages(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:count_messages(LUser, LServer).
-spec add_delay_info(message(), binary(),
undefined | erlang:timestamp()) -> message().
add_delay_info(Packet, LServer, TS) ->
NewTS = case TS of
undefined -> p1_time_compat:timestamp();
_ -> TS
end,
Packet1 = xmpp:put_meta(Packet, from_offline, true),
xmpp_util:add_delay_info(Packet1, jid:make(LServer), NewTS,
<<"Offline storage">>).
-spec get_priority_from_presence(presence()) -> integer().
get_priority_from_presence(#presence{priority = Prio}) ->
case Prio of
undefined -> 0;
_ -> Prio
end.
export(LServer) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:export(LServer).
import_info() ->
[{<<"spool">>, 4}].
import_start(LServer, DBType) ->
Mod = gen_mod:db_mod(DBType, ?MODULE),
Mod:import(LServer, []).
import(LServer, {sql, _}, DBType, <<"spool">>,
[LUser, XML, _Seq, _TimeStamp]) ->
El = fxml_stream:parse_element(XML),
From = #jid{} = jid:from_string(
fxml:get_attr_s(<<"from">>, El#xmlel.attrs)),
To = #jid{} = jid:from_string(
fxml:get_attr_s(<<"to">>, El#xmlel.attrs)),
Stamp = fxml:get_path_s(El, [{elem, <<"delay">>},
{attr, <<"stamp">>}]),
TS = try xmpp_util:decode_timestamp(Stamp) of
{MegaSecs, Secs, _} ->
{MegaSecs, Secs, 0}
catch _:_ ->
p1_time_compat:timestamp()
end,
US = {LUser, LServer},
Expire = find_x_expire(TS, El#xmlel.children),
Msg = #offline_msg{us = US, packet = El,
from = From, to = To,
timestamp = TS, expire = Expire},
Mod = gen_mod:db_mod(DBType, ?MODULE),
Mod:import(Msg).
mod_opt_type(access_max_user_messages) ->
fun acl:shaper_rules_validator/1;
mod_opt_type(db_type) -> fun(T) -> ejabberd_config:v_db(?MODULE, T) end;
mod_opt_type(store_empty_body) ->
fun (V) when is_boolean(V) -> V;
(unless_chat_state) -> unless_chat_state
end;
mod_opt_type(_) ->
[access_max_user_messages, db_type, store_empty_body].
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