148 lines
4.9 KiB
Erlang
148 lines
4.9 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_private.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Support for private storage.
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%%% Created : 16 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2017 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_private).
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-author('alexey@process-one.net').
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-protocol({xep, 49, '1.2'}).
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-behaviour(gen_mod).
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-export([start/2, stop/1, process_sm_iq/1, import_info/0,
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remove_user/2, get_data/2, get_data/3, export/1,
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import/5, import_start/2, mod_opt_type/1, set_data/3, depends/2]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-include("xmpp.hrl").
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-include("mod_private.hrl").
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-callback init(binary(), gen_mod:opts()) -> any().
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-callback import(binary(), binary(), [binary()]) -> ok.
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-callback set_data(binary(), binary(), [{binary(), xmlel()}]) -> {atomic, any()}.
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-callback get_data(binary(), binary(), binary()) -> {ok, xmlel()} | error.
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-callback get_all_data(binary(), binary()) -> [xmlel()].
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-callback remove_user(binary(), binary()) -> 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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ejabberd_hooks:add(remove_user, Host, ?MODULE,
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remove_user, 50),
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gen_iq_handler:add_iq_handler(ejabberd_sm, Host,
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?NS_PRIVATE, ?MODULE, process_sm_iq, IQDisc).
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stop(Host) ->
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ejabberd_hooks:delete(remove_user, Host, ?MODULE,
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remove_user, 50),
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gen_iq_handler:remove_iq_handler(ejabberd_sm, Host,
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?NS_PRIVATE).
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-spec process_sm_iq(iq()) -> iq().
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process_sm_iq(#iq{type = Type, lang = Lang,
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from = #jid{luser = LUser, lserver = LServer},
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to = #jid{luser = LUser, lserver = LServer},
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sub_els = [#private{xml_els = Els0}]} = IQ) ->
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case filter_xmlels(Els0) of
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[] ->
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Txt = <<"No private data found in this query">>,
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xmpp:make_error(IQ, xmpp:err_bad_request(Txt, Lang));
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Data when Type == set ->
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set_data(LUser, LServer, Data),
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xmpp:make_iq_result(IQ);
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Data when Type == get ->
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StorageEls = get_data(LUser, LServer, Data),
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xmpp:make_iq_result(IQ, #private{xml_els = StorageEls})
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end;
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process_sm_iq(#iq{lang = Lang} = IQ) ->
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Txt = <<"Query to another users is forbidden">>,
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xmpp:make_error(IQ, xmpp:err_forbidden(Txt, Lang)).
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-spec filter_xmlels([xmlel()]) -> [{binary(), xmlel()}].
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filter_xmlels(Els) ->
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lists:flatmap(
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fun(#xmlel{} = El) ->
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case fxml:get_tag_attr_s(<<"xmlns">>, El) of
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<<"">> -> [];
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NS -> [{NS, El}]
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end
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end, Els).
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-spec set_data(binary(), binary(), [{binary(), xmlel()}]) -> {atomic, any()}.
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set_data(LUser, LServer, Data) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:set_data(LUser, LServer, Data).
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-spec get_data(binary(), binary(), [{binary(), xmlel()}]) -> [xmlel()].
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get_data(LUser, LServer, Data) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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lists:map(
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fun({NS, El}) ->
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case Mod:get_data(LUser, LServer, NS) of
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{ok, StorageEl} ->
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StorageEl;
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error ->
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El
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end
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end, Data).
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-spec get_data(binary(), binary()) -> [xmlel()].
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get_data(LUser, LServer) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:get_all_data(LUser, LServer).
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-spec remove_user(binary(), binary()) -> any().
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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(Server, ?MODULE),
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Mod:remove_user(LUser, LServer).
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import_info() ->
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[{<<"private_storage">>, 4}].
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import_start(LServer, DBType) ->
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Mod = gen_mod:db_mod(DBType, ?MODULE),
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Mod:init(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, {sql, _}, DBType, Tab, L) ->
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Mod = gen_mod:db_mod(DBType, ?MODULE),
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Mod:import(LServer, Tab, L).
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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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