%%%-------------------------------------------------------------------
%%% File : mod_offline_sql.erl
%%% Author : Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% Created : 15 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_offline_sql).
-compile([{parse_transform, ejabberd_sql_pt}]).
-behaviour(mod_offline).
-export([init/2, store_message/1, pop_messages/2, remove_expired_messages/1,
remove_old_messages/2, remove_user/2, read_message_headers/2,
read_message/3, remove_message/3, read_all_messages/2,
remove_all_messages/2, count_messages/2, import/1, export/1]).
-include("xmpp.hrl").
-include("mod_offline.hrl").
-include("logger.hrl").
-include("ejabberd_sql_pt.hrl").
%%%===================================================================
%%% API
%%%===================================================================
init(_Host, _Opts) ->
ok.
store_message(#offline_msg{us = {LUser, LServer}} = M) ->
From = M#offline_msg.from,
To = M#offline_msg.to,
Packet = xmpp:set_from_to(M#offline_msg.packet, From, To),
NewPacket = xmpp_util:add_delay_info(
Packet, jid:make(LServer),
M#offline_msg.timestamp,
<<"Offline Storage">>),
XML = fxml:element_to_binary(
xmpp:encode(NewPacket)),
case ejabberd_sql:sql_query(
LServer,
?SQL_INSERT(
"spool",
["username=%(LUser)s",
"server_host=%(LServer)s",
"xml=%(XML)s"])) of
{updated, _} ->
ok;
_ ->
{error, db_failure}
end.
pop_messages(LUser, LServer) ->
case get_and_del_spool_msg_t(LServer, LUser) of
{atomic, {selected, Rs}} ->
{ok, lists:flatmap(
fun({_, XML}) ->
case xml_to_offline_msg(XML) of
{ok, Msg} ->
[Msg];
_Err ->
[]
end
end, Rs)};
Err ->
{error, Err}
end.
remove_expired_messages(_LServer) ->
%% TODO
{atomic, ok}.
remove_old_messages(Days, LServer) ->
case ejabberd_sql:sql_query(
LServer,
?SQL("DELETE FROM spool"
" WHERE created_at < NOW() - INTERVAL %(Days)d DAY")) of
{updated, N} ->
?INFO_MSG("~p message(s) deleted from offline spool", [N]);
_Error ->
?ERROR_MSG("Cannot delete message in offline spool: ~p", [_Error])
end,
{atomic, ok}.
remove_user(LUser, LServer) ->
ejabberd_sql:sql_query(
LServer,
?SQL("delete from spool where username=%(LUser)s and %(LServer)H")).
read_message_headers(LUser, LServer) ->
case ejabberd_sql:sql_query(
LServer,
?SQL("select @(xml)s, @(seq)d from spool"
" where username=%(LUser)s and %(LServer)H order by seq")) of
{selected, Rows} ->
lists:flatmap(
fun({XML, Seq}) ->
case xml_to_offline_msg(XML) of
{ok, #offline_msg{from = From,
to = To,
timestamp = TS,
packet = El}} ->
[{Seq, From, To, TS, El}];
_ ->
[]
end
end, Rows);
_Err ->
[]
end.
read_message(LUser, LServer, Seq) ->
case ejabberd_sql:sql_query(
LServer,
?SQL("select @(xml)s from spool where username=%(LUser)s"
" and %(LServer)H"
" and seq=%(Seq)d")) of
{selected, [{RawXML}|_]} ->
case xml_to_offline_msg(RawXML) of
{ok, Msg} ->
{ok, Msg};
_ ->
error
end;
_ ->
error
end.
remove_message(LUser, LServer, Seq) ->
ejabberd_sql:sql_query(
LServer,
?SQL("delete from spool where username=%(LUser)s and %(LServer)H"
" and seq=%(Seq)d")),
ok.
read_all_messages(LUser, LServer) ->
case ejabberd_sql:sql_query(
LServer,
?SQL("select @(xml)s from spool where "
"username=%(LUser)s and %(LServer)H order by seq")) of
{selected, Rs} ->
lists:flatmap(
fun({XML}) ->
case xml_to_offline_msg(XML) of
{ok, Msg} -> [Msg];
_ -> []
end
end, Rs);
_ ->
[]
end.
remove_all_messages(LUser, LServer) ->
remove_user(LUser, LServer),
{atomic, ok}.
count_messages(LUser, LServer) ->
case catch ejabberd_sql:sql_query(
LServer,
?SQL("select @(count(*))d from spool "
"where username=%(LUser)s and %(LServer)H")) of
{selected, [{Res}]} ->
Res;
_ -> 0
end.
export(_Server) ->
[{offline_msg,
fun(Host, #offline_msg{us = {LUser, LServer}})
when LServer == Host ->
[?SQL("delete from spool where username=%(LUser)s"
" and %(LServer)H;")];
(_Host, _R) ->
[]
end},
{offline_msg,
fun(Host, #offline_msg{us = {LUser, LServer},
timestamp = TimeStamp, from = From, to = To,
packet = El})
when LServer == Host ->
try xmpp:decode(El, ?NS_CLIENT, [ignore_els]) of
Packet ->
Packet1 = xmpp:set_from_to(Packet, From, To),
Packet2 = xmpp_util:add_delay_info(
Packet1, jid:make(LServer),
TimeStamp, <<"Offline Storage">>),
XML = fxml:element_to_binary(xmpp:encode(Packet2)),
[?SQL_INSERT(
"spool",
["username=%(LUser)s",
"server_host=%(LServer)s",
"xml=%(XML)s"])]
catch _:{xmpp_codec, Why} ->
?ERROR_MSG("failed to decode packet ~p of user ~s@~s: ~s",
[El, LUser, LServer, xmpp:format_error(Why)]),
[]
end;
(_Host, _R) ->
[]
end}].
import(_) ->
ok.
%%%===================================================================
%%% Internal functions
%%%===================================================================
xml_to_offline_msg(XML) ->
case fxml_stream:parse_element(XML) of
#xmlel{} = El ->
el_to_offline_msg(El);
Err ->
?ERROR_MSG("got ~p when parsing XML packet ~s",
[Err, XML]),
Err
end.
el_to_offline_msg(El) ->
To_s = fxml:get_tag_attr_s(<<"to">>, El),
From_s = fxml:get_tag_attr_s(<<"from">>, El),
try
To = jid:decode(To_s),
From = jid:decode(From_s),
{ok, #offline_msg{us = {To#jid.luser, To#jid.lserver},
from = From,
to = To,
packet = El}}
catch _:{bad_jid, To_s} ->
?ERROR_MSG("failed to get 'to' JID from offline XML ~p", [El]),
{error, bad_jid_to};
_:{bad_jid, From_s} ->
?ERROR_MSG("failed to get 'from' JID from offline XML ~p", [El]),
{error, bad_jid_from}
end.
get_and_del_spool_msg_t(LServer, LUser) ->
F = fun () ->
Result =
ejabberd_sql:sql_query_t(
?SQL("select @(username)s, @(xml)s from spool where "
"username=%(LUser)s and %(LServer)H order by seq;")),
ejabberd_sql:sql_query_t(
?SQL("delete from spool where"
" username=%(LUser)s and %(LServer)H;")),
Result
end,
ejabberd_sql:sql_transaction(LServer, F).
