mirror of
https://github.com/processone/ejabberd.git
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135 lines
4.1 KiB
Erlang
135 lines
4.1 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% File : mod_announce_mnesia.erl
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%%% Author : Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% Created : 13 Apr 2016 by Evgeny Khramtsov <ekhramtsov@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_announce_mnesia).
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-behaviour(mod_announce).
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%% API
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-export([init/2, set_motd_users/2, set_motd/2, delete_motd/1,
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get_motd/1, is_motd_user/2, set_motd_user/2, import/3]).
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-export([need_transform/1, transform/1]).
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-include("xmpp.hrl").
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-include("mod_announce.hrl").
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-include("logger.hrl").
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%%%===================================================================
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%%% API
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%%%===================================================================
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init(_Host, _Opts) ->
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ejabberd_mnesia:create(?MODULE, motd,
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[{disc_only_copies, [node()]},
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{attributes,
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record_info(fields, motd)}]),
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ejabberd_mnesia:create(?MODULE, motd_users,
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[{disc_only_copies, [node()]},
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{attributes,
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record_info(fields, motd_users)}]).
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set_motd_users(_LServer, USRs) ->
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F = fun() ->
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lists:foreach(
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fun({U, S, _R}) ->
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mnesia:write(#motd_users{us = {U, S}})
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end, USRs)
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end,
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transaction(F).
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set_motd(LServer, Packet) ->
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F = fun() ->
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mnesia:write(#motd{server = LServer, packet = Packet})
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end,
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transaction(F).
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delete_motd(LServer) ->
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F = fun() ->
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mnesia:delete({motd, LServer}),
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mnesia:write_lock_table(motd_users),
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Users = mnesia:select(
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motd_users,
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[{#motd_users{us = '$1', _ = '_'},
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[{'==', {element, 2, '$1'}, LServer}],
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['$1']}]),
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lists:foreach(fun(US) ->
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mnesia:delete({motd_users, US})
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end, Users)
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end,
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transaction(F).
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get_motd(LServer) ->
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case mnesia:dirty_read({motd, LServer}) of
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[#motd{packet = Packet}] ->
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{ok, Packet};
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[] ->
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error
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end.
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is_motd_user(LUser, LServer) ->
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case mnesia:dirty_read({motd_users, {LUser, LServer}}) of
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[#motd_users{}] -> {ok, true};
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_ -> {ok, false}
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end.
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set_motd_user(LUser, LServer) ->
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F = fun() ->
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mnesia:write(#motd_users{us = {LUser, LServer}})
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end,
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transaction(F).
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need_transform(#motd{server = S}) when is_list(S) ->
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?INFO_MSG("Mnesia table 'motd' will be converted to binary", []),
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true;
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need_transform(#motd_users{us = {U, S}}) when is_list(U) orelse is_list(S) ->
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?INFO_MSG("Mnesia table 'motd_users' will be converted to binary", []),
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true;
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need_transform(_) ->
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false.
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transform(#motd{server = S, packet = P} = R) ->
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NewS = iolist_to_binary(S),
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NewP = fxml:to_xmlel(P),
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R#motd{server = NewS, packet = NewP};
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transform(#motd_users{us = {U, S}} = R) ->
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NewUS = {iolist_to_binary(U), iolist_to_binary(S)},
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R#motd_users{us = NewUS}.
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import(LServer, <<"motd">>, [<<>>, XML, _TimeStamp]) ->
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El = fxml_stream:parse_element(XML),
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mnesia:dirty_write(#motd{server = LServer, packet = El});
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import(LServer, <<"motd">>, [LUser, <<>>, _TimeStamp]) ->
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mnesia:dirty_write(#motd_users{us = {LUser, LServer}}).
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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transaction(F) ->
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case mnesia:transaction(F) of
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{atomic, Res} ->
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Res;
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{aborted, Reason} ->
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?ERROR_MSG("Mnesia transaction failed: ~p", [Reason]),
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{error, db_failure}
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end.
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