%%%-------------------------------------------------------------------
%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% @copyright (C) 2016, Evgeny Khramtsov
%%% @doc
%%%
%%% @end
%%% Created : 15 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%-------------------------------------------------------------------
-module(mod_offline_sql).
-compile([{parse_transform, ejabberd_sql_pt}]).
-behaviour(mod_offline).
-export([init/2, store_messages/5, 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, import/2,
export/1]).
-include("jlib.hrl").
-include("mod_offline.hrl").
-include("logger.hrl").
-include("ejabberd_sql_pt.hrl").
%%%===================================================================
%%% API
%%%===================================================================
init(_Host, _Opts) ->
ok.
store_messages(Host, {User, _Server}, Msgs, Len, MaxOfflineMsgs) ->
Count = if MaxOfflineMsgs =/= infinity ->
Len + count_messages(User, Host);
true -> 0
end,
if Count > MaxOfflineMsgs -> {atomic, discard};
true ->
Query = lists:map(
fun(M) ->
Username =
ejabberd_sql:escape((M#offline_msg.to)#jid.luser),
From = M#offline_msg.from,
To = M#offline_msg.to,
Packet =
jlib:replace_from_to(From, To,
M#offline_msg.packet),
NewPacket =
jlib:add_delay_info(Packet, Host,
M#offline_msg.timestamp,
<<"Offline Storage">>),
XML =
ejabberd_sql:escape(fxml:element_to_binary(NewPacket)),
sql_queries:add_spool_sql(Username, XML)
end,
Msgs),
sql_queries:add_spool(Host, Query)
end.
pop_messages(LUser, LServer) ->
case sql_queries: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 catch ejabberd_sql:sql_query(
LServer,
[<<"DELETE FROM spool"
" WHERE created_at < "
"DATE_SUB(CURDATE(), INTERVAL ">>,
integer_to_list(Days), <<" 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) ->
sql_queries:del_spool_msg(LServer, LUser).
read_message_headers(LUser, LServer) ->
Username = ejabberd_sql:escape(LUser),
case catch ejabberd_sql:sql_query(
LServer, [<<"select xml, seq from spool where username ='">>,
Username, <<"' order by seq;">>]) of
{selected, [<<"xml">>, <<"seq">>], Rows} ->
lists:flatmap(
fun([XML, Seq]) ->
case xml_to_offline_msg(XML) of
{ok, #offline_msg{from = From,
to = To,
packet = El}} ->
Seq0 = binary_to_integer(Seq),
[{Seq0, From, To, El}];
_ ->
[]
end
end, Rows);
_Err ->
[]
end.
read_message(LUser, LServer, Seq) ->
Username = ejabberd_sql:escape(LUser),
SSeq = ejabberd_sql:escape(integer_to_binary(Seq)),
case ejabberd_sql:sql_query(
LServer,
[<<"select xml from spool where username='">>, Username,
<<"' and seq='">>, SSeq, <<"';">>]) of
{selected, [<<"xml">>], [[RawXML]|_]} ->
case xml_to_offline_msg(RawXML) of
{ok, Msg} ->
{ok, Msg};
_ ->
error
end;
_ ->
error
end.
remove_message(LUser, LServer, Seq) ->
Username = ejabberd_sql:escape(LUser),
SSeq = ejabberd_sql:escape(integer_to_binary(Seq)),
ejabberd_sql:sql_query(
LServer,
[<<"delete from spool where username='">>, Username,
<<"' and seq='">>, SSeq, <<"';">>]),
ok.
read_all_messages(LUser, LServer) ->
case catch ejabberd_sql:sql_query(
LServer,
?SQL("select @(xml)s from spool where "
"username=%(LUser)s 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) ->
sql_queries:del_spool_msg(LServer, LUser),
{atomic, ok}.
count_messages(LUser, LServer) ->
case catch ejabberd_sql:sql_query(
LServer,
?SQL("select @(count(*))d from spool "
"where username=%(LUser)s")) of
{selected, [{Res}]} ->
Res;
_ -> 0
end.
export(_Server) ->
[{offline_msg,
fun(Host, #offline_msg{us = {LUser, LServer},
timestamp = TimeStamp, from = From, to = To,
packet = Packet})
when LServer == Host ->
Username = ejabberd_sql:escape(LUser),
Packet1 = jlib:replace_from_to(From, To, Packet),
Packet2 = jlib:add_delay_info(Packet1, LServer, TimeStamp,
<<"Offline Storage">>),
XML = ejabberd_sql:escape(fxml:element_to_binary(Packet2)),
[[<<"delete from spool where username='">>, Username, <<"';">>],
[<<"insert into spool(username, xml) values ('">>,
Username, <<"', '">>, XML, <<"');">>]];
(_Host, _R) ->
[]
end}].
import(LServer) ->
[{<<"select username, xml from spool;">>,
fun([LUser, XML]) ->
El = #xmlel{} = 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 = case jlib:datetime_string_to_timestamp(Stamp) of
{_, _, _} = Now ->
Now;
undefined ->
p1_time_compat:timestamp()
end,
Expire = mod_offline:find_x_expire(TS, El#xmlel.children),
#offline_msg{us = {LUser, LServer},
from = From, to = To,
packet = El,
timestamp = TS, expire = Expire}
end}].
import(_, _) ->
pass.
%%%===================================================================
%%% 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),
To = jid:from_string(To_s),
From = jid:from_string(From_s),
if To == error ->
?ERROR_MSG("failed to get 'to' JID from offline XML ~p", [El]),
{error, bad_jid_to};
From == error ->
?ERROR_MSG("failed to get 'from' JID from offline XML ~p", [El]),
{error, bad_jid_from};
true ->
{ok, #offline_msg{us = {To#jid.luser, To#jid.lserver},
from = From,
to = To,
timestamp = undefined,
expire = undefined,
packet = El}}
end.
