mirror of
https://github.com/processone/ejabberd.git
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268 lines
8.5 KiB
Erlang
268 lines
8.5 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_last.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : jabber:iq:last support (XEP-0012)
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%%% Created : 24 Oct 2003 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2016 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%----------------------------------------------------------------------
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-module(mod_last).
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-behaviour(ejabberd_config).
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-author('alexey@process-one.net').
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-protocol({xep, 12, '2.0'}).
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-behaviour(gen_mod).
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-export([start/2, stop/1, process_local_iq/3, export/1,
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process_sm_iq/3, on_presence_update/4, import/1,
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import/3, store_last_info/4, get_last_info/2,
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remove_user/2, transform_options/1, mod_opt_type/1,
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opt_type/1, register_user/2, depends/2]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-include("jlib.hrl").
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-include("mod_privacy.hrl").
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-include("mod_last.hrl").
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-callback init(binary(), gen_mod:opts()) -> any().
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-callback import(binary(), #last_activity{}) -> ok | pass.
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-callback get_last(binary(), binary()) ->
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{ok, non_neg_integer(), binary()} | not_found | {error, any()}.
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-callback store_last_info(binary(), binary(), non_neg_integer(), binary()) ->
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{atomic, any()}.
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-callback remove_user(binary(), binary()) -> {atomic, any()}.
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start(Host, Opts) ->
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IQDisc = gen_mod:get_opt(iqdisc, Opts, fun gen_iq_handler:check_type/1,
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one_queue),
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Mod = gen_mod:db_mod(Host, Opts, ?MODULE),
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Mod:init(Host, Opts),
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gen_iq_handler:add_iq_handler(ejabberd_local, Host,
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?NS_LAST, ?MODULE, process_local_iq, IQDisc),
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gen_iq_handler:add_iq_handler(ejabberd_sm, Host,
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?NS_LAST, ?MODULE, process_sm_iq, IQDisc),
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ejabberd_hooks:add(register_user, Host, ?MODULE,
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register_user, 50),
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ejabberd_hooks:add(remove_user, Host, ?MODULE,
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remove_user, 50),
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ejabberd_hooks:add(unset_presence_hook, Host, ?MODULE,
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on_presence_update, 50).
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stop(Host) ->
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ejabberd_hooks:delete(register_user, Host, ?MODULE,
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register_user, 50),
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ejabberd_hooks:delete(remove_user, Host, ?MODULE,
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remove_user, 50),
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ejabberd_hooks:delete(unset_presence_hook, Host,
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?MODULE, on_presence_update, 50),
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gen_iq_handler:remove_iq_handler(ejabberd_local, Host,
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?NS_LAST),
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gen_iq_handler:remove_iq_handler(ejabberd_sm, Host,
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?NS_LAST).
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%%%
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%%% Uptime of ejabberd node
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%%%
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process_local_iq(_From, _To,
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#iq{type = Type, lang = Lang, sub_el = SubEl} = IQ) ->
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case Type of
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set ->
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Txt = <<"Value 'set' of 'type' attribute is not allowed">>,
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IQ#iq{type = error, sub_el = [SubEl, ?ERRT_NOT_ALLOWED(Lang, Txt)]};
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get ->
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Sec = get_node_uptime(),
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IQ#iq{type = result,
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sub_el =
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[#xmlel{name = <<"query">>,
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attrs =
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[{<<"xmlns">>, ?NS_LAST},
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{<<"seconds">>,
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iolist_to_binary(integer_to_list(Sec))}],
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children = []}]}
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end.
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%% @spec () -> integer()
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%% @doc Get the uptime of the ejabberd node, expressed in seconds.
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%% When ejabberd is starting, ejabberd_config:start/0 stores the datetime.
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get_node_uptime() ->
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case ejabberd_config:get_option(
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node_start,
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fun(S) when is_integer(S), S >= 0 -> S end) of
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undefined ->
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trunc(element(1, erlang:statistics(wall_clock)) / 1000);
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Now ->
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p1_time_compat:system_time(seconds) - Now
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end.
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now_to_seconds({MegaSecs, Secs, _MicroSecs}) ->
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MegaSecs * 1000000 + Secs.
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%%%
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%%% Serve queries about user last online
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%%%
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process_sm_iq(From, To,
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#iq{type = Type, lang = Lang, sub_el = SubEl} = IQ) ->
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case Type of
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set ->
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Txt = <<"Value 'set' of 'type' attribute is not allowed">>,
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IQ#iq{type = error, sub_el = [SubEl, ?ERRT_NOT_ALLOWED(Lang, Txt)]};
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get ->
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User = To#jid.luser,
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Server = To#jid.lserver,
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{Subscription, _Groups} =
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ejabberd_hooks:run_fold(roster_get_jid_info, Server,
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{none, []}, [User, Server, From]),
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if (Subscription == both) or (Subscription == from) or
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(From#jid.luser == To#jid.luser) and
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(From#jid.lserver == To#jid.lserver) ->
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UserListRecord =
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ejabberd_hooks:run_fold(privacy_get_user_list, Server,
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#userlist{}, [User, Server]),
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case ejabberd_hooks:run_fold(privacy_check_packet,
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Server, allow,
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[User, Server, UserListRecord,
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{To, From,
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#xmlel{name = <<"presence">>,
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attrs = [],
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children = []}},
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out])
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of
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allow -> get_last_iq(IQ, SubEl, User, Server);
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deny ->
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IQ#iq{type = error, sub_el = [SubEl, ?ERR_FORBIDDEN]}
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end;
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true ->
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Txt = <<"Not subscribed">>,
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IQ#iq{type = error, sub_el = [SubEl, ?ERRT_FORBIDDEN(Lang, Txt)]}
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end
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end.
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%% @spec (LUser::string(), LServer::string()) ->
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%% {ok, TimeStamp::integer(), Status::string()} | not_found | {error, Reason}
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get_last(LUser, LServer) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:get_last(LUser, LServer).
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get_last_iq(#iq{lang = Lang} = IQ, SubEl, LUser, LServer) ->
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case ejabberd_sm:get_user_resources(LUser, LServer) of
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[] ->
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case get_last(LUser, LServer) of
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{error, _Reason} ->
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Txt = <<"Database failure">>,
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IQ#iq{type = error,
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sub_el = [SubEl, ?ERRT_INTERNAL_SERVER_ERROR(Lang, Txt)]};
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not_found ->
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Txt = <<"No info about last activity found">>,
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IQ#iq{type = error,
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sub_el = [SubEl, ?ERRT_SERVICE_UNAVAILABLE(Lang, Txt)]};
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{ok, TimeStamp, Status} ->
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TimeStamp2 = p1_time_compat:system_time(seconds),
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Sec = TimeStamp2 - TimeStamp,
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IQ#iq{type = result,
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sub_el =
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[#xmlel{name = <<"query">>,
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attrs =
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[{<<"xmlns">>, ?NS_LAST},
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{<<"seconds">>,
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iolist_to_binary(integer_to_list(Sec))}],
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children = [{xmlcdata, Status}]}]}
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end;
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_ ->
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IQ#iq{type = result,
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sub_el =
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[#xmlel{name = <<"query">>,
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attrs =
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[{<<"xmlns">>, ?NS_LAST},
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{<<"seconds">>, <<"0">>}],
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children = []}]}
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end.
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register_user(User, Server) ->
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on_presence_update(
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User,
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Server,
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<<"RegisterResource">>,
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<<"Registered but didn't login">>).
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on_presence_update(User, Server, _Resource, Status) ->
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TimeStamp = p1_time_compat:system_time(seconds),
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store_last_info(User, Server, TimeStamp, Status).
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store_last_info(User, Server, TimeStamp, Status) ->
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LUser = jid:nodeprep(User),
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LServer = jid:nameprep(Server),
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:store_last_info(LUser, LServer, TimeStamp, Status).
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%% @spec (LUser::string(), LServer::string()) ->
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%% {ok, TimeStamp::integer(), Status::string()} | not_found
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get_last_info(LUser, LServer) ->
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case get_last(LUser, LServer) of
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{error, _Reason} -> not_found;
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Res -> Res
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end.
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remove_user(User, Server) ->
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LUser = jid:nodeprep(User),
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LServer = jid:nameprep(Server),
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:remove_user(LUser, LServer).
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export(LServer) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:export(LServer).
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import(LServer) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:import(LServer).
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import(LServer, DBType, LA) ->
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Mod = gen_mod:db_mod(DBType, ?MODULE),
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Mod:import(LServer, LA).
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transform_options(Opts) ->
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lists:foldl(fun transform_options/2, [], Opts).
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transform_options({node_start, {_, _, _} = Now}, Opts) ->
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?WARNING_MSG("Old 'node_start' format detected. This is still supported "
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"but it is better to fix your config.", []),
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[{node_start, now_to_seconds(Now)}|Opts];
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transform_options(Opt, Opts) ->
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[Opt|Opts].
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depends(_Host, _Opts) ->
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[].
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mod_opt_type(db_type) -> fun(T) -> ejabberd_config:v_db(?MODULE, T) end;
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mod_opt_type(iqdisc) -> fun gen_iq_handler:check_type/1;
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mod_opt_type(_) -> [db_type, iqdisc].
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opt_type(node_start) ->
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fun (S) when is_integer(S), S >= 0 -> S end;
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opt_type(_) -> [node_start].
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