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741ff3cc75
* src/mod_offline.erl: Now all offline packets processed in separate queue to avoid delaying of other packets transmission. Also all packets in queue processed in one transaction. SVN Revision: 72
159 lines
3.3 KiB
Erlang
159 lines
3.3 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_offline.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose :
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%%% Created : 5 Jan 2003 by Alexey Shchepin <alexey@sevcom.net>
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%%% Id : $Id$
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%%%----------------------------------------------------------------------
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-module(mod_offline).
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-author('alexey@sevcom.net').
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-behaviour(gen_mod).
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-export([start/1,
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init/0,
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stop/0,
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store_packet/3,
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resend_offline_messages/1,
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remove_user/1]).
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-include("namespaces.hrl").
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-record(offline_msg, {user, timestamp, from, to, packet}).
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-define(PROCNAME, ejabberd_offline).
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start(_) ->
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mnesia:create_table(offline_msg,
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[{disc_only_copies, [node()]},
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{type, bag},
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{attributes, record_info(fields, offline_msg)}]),
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register(?PROCNAME, spawn(?MODULE, init, [])).
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init() ->
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loop().
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loop() ->
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receive
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#offline_msg{} = Msg ->
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Msgs = receive_all([Msg]),
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F = fun() ->
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lists:foreach(fun(M) ->
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mnesia:write(M)
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end, Msgs)
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end,
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mnesia:transaction(F),
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loop();
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_ ->
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loop()
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end.
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receive_all(Msgs) ->
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receive
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#offline_msg{} = Msg ->
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receive_all([Msg | Msgs])
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after 0 ->
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Msgs
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end.
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stop() ->
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% TODO: maybe throw error that this module can't be removed?
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ok.
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store_packet(From, To, Packet) ->
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case check_event(From, To, Packet) of
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true ->
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{User, Server, Resource} = To,
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LUser = jlib:tolower(User),
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TimeStamp = now(),
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?PROCNAME ! #offline_msg{user = LUser,
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timestamp = TimeStamp,
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from = From,
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to = To,
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packet = Packet};
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_ ->
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ok
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end.
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check_event(From, To, Packet) ->
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{xmlelement, Name, Attrs, Els} = Packet,
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case find_x_event(Els) of
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false ->
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true;
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El ->
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case xml:get_subtag(El, "id") of
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false ->
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case xml:get_subtag(El, "offline") of
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false ->
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true;
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_ ->
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ID = case xml:get_tag_attr_s("id", Packet) of
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"" ->
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{xmlelement, "id", [], []};
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S ->
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{xmlelement, "id", [],
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[{xmlcdata, S}]}
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end,
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ejabberd_router:route(
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To, From, {xmlelement, Name, Attrs,
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[{xmlelement, "x",
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[{"xmlns", ?NS_EVENT}],
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[ID,
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{xmlelement, "offline", [], []}]}]
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}),
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true
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end;
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_ ->
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false
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end
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end.
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find_x_event([]) ->
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false;
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find_x_event([{xmlcdata, _} | Els]) ->
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find_x_event(Els);
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find_x_event([El | Els]) ->
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case xml:get_tag_attr_s("xmlns", El) of
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?NS_EVENT ->
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El;
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_ ->
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find_x_event(Els)
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end.
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resend_offline_messages(User) ->
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LUser = jlib:tolower(User),
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F = fun() ->
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Rs = mnesia:read({offline_msg, LUser}),
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mnesia:delete({offline_msg, LUser}),
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Rs
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end,
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case mnesia:transaction(F) of
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{atomic, Rs} ->
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lists:foreach(
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fun(R) ->
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{xmlelement, Name, Attrs, Els} = R#offline_msg.packet,
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ejabberd_sm !
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{route,
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R#offline_msg.from,
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R#offline_msg.to,
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{xmlelement, Name, Attrs,
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Els ++
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[jlib:timestamp_to_xml(
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calendar:now_to_universal_time(
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R#offline_msg.timestamp))]}}
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end,
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lists:keysort(#offline_msg.timestamp, Rs));
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_ ->
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ok
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end.
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remove_user(User) ->
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LUser = jlib:tolower(User),
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F = fun() ->
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mnesia:delete({offline_msg, LUser})
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end,
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mnesia:transaction(F).
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