mirror of
https://github.com/processone/ejabberd.git
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122 lines
3.2 KiB
Erlang
122 lines
3.2 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_last.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose : jabber:iq:last support (JEP-0012)
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%%% Created : 24 Oct 2003 by Alexey Shchepin <alexey@sevcom.net>
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%%% Id : $Id$
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%%%----------------------------------------------------------------------
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-module(mod_last).
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-author('alexey@sevcom.net').
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-vsn('$Revision$ ').
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-behaviour(gen_mod).
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-export([start/1,
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stop/0,
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process_local_iq/3,
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process_sm_iq/3,
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on_presence_update/1,
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remove_user/1]).
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-include("ejabberd.hrl").
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-include("jlib.hrl").
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-record(last_activity, {user, timestamp}).
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start(Opts) ->
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IQDisc = gen_mod:get_opt(iqdisc, Opts, one_queue),
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mnesia:create_table(last_activity,
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[{disc_copies, [node()]},
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{attributes, record_info(fields, last_activity)}]),
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gen_iq_handler:add_iq_handler(ejabberd_local, ?NS_LAST,
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?MODULE, process_local_iq, IQDisc),
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gen_iq_handler:add_iq_handler(ejabberd_sm, ?NS_LAST,
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?MODULE, process_sm_iq, IQDisc).
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stop() ->
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gen_iq_handler:remove_iq_handler(ejabberd_local, ?NS_LAST).
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process_local_iq(_From, _To, #iq{type = Type, sub_el = SubEl} = IQ) ->
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case Type of
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set ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_NOT_ALLOWED]};
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get ->
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Sec = trunc(element(1, erlang:statistics(wall_clock))/1000),
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IQ#iq{type = result,
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sub_el = [{xmlelement, "query",
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[{"xmlns", ?NS_LAST},
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{"seconds", integer_to_list(Sec)}],
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[]}]}
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end.
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process_sm_iq(From, To, #iq{type = Type, sub_el = SubEl} = IQ) ->
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case Type of
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set ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_NOT_ALLOWED]};
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get ->
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User = To#jid.luser,
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{Subscription, _Groups} =
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mod_roster:get_jid_info(User, From),
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if
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(Subscription == both) or (Subscription == from) ->
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case catch mod_privacy:get_user_list(User) of
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{'EXIT', _Reason} ->
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get_last(IQ, SubEl, User);
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List ->
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case mod_privacy:check_packet(
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User, List,
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{From, To,
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{xmlelement, "presence", [], []}},
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out) of
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allow ->
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get_last(IQ, SubEl, User);
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deny ->
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IQ#iq{type = error,
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sub_el = [SubEl, ?ERR_NOT_ALLOWED]}
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end
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end;
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true ->
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IQ#iq{type = error,
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sub_el = [SubEl, ?ERR_NOT_ALLOWED]}
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end
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end.
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get_last(IQ, SubEl, LUser) ->
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case catch mnesia:dirty_read(last_activity, LUser) of
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{'EXIT', _Reason} ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_INTERNAL_SERVER_ERROR]};
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[] ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_SERVICE_UNAVAILABLE]};
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[#last_activity{timestamp = TimeStamp}] ->
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{MegaSecs, Secs, _MicroSecs} = now(),
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TimeStamp2 = MegaSecs * 1000000 + Secs,
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Sec = TimeStamp2 - TimeStamp,
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IQ#iq{type = result,
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sub_el = [{xmlelement, "query",
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[{"xmlns", ?NS_LAST},
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{"seconds", integer_to_list(Sec)}],
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[]}]}
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end.
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on_presence_update(LUser) ->
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{MegaSecs, Secs, _MicroSecs} = now(),
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TimeStamp = MegaSecs * 1000000 + Secs,
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F = fun() ->
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mnesia:write(#last_activity{user = LUser,
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timestamp = TimeStamp})
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end,
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mnesia:transaction(F).
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remove_user(User) ->
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LUser = jlib:nodeprep(User),
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F = fun() ->
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mnesia:delete({last_activity, LUser})
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end,
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mnesia:transaction(F).
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