%%%-------------------------------------------------------------------
%%% File : mod_last_mnesia.erl
%%% Author : Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% Created : 13 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2022 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License along
%%% with this program; if not, write to the Free Software Foundation, Inc.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%----------------------------------------------------------------------
-module(mod_last_mnesia).
-behaviour(mod_last).
%% API
-export([init/2, import/2, get_last/2, store_last_info/4,
remove_user/2, use_cache/1]).
-export([need_transform/1, transform/1]).
-include("mod_last.hrl").
-include("logger.hrl").
%%%===================================================================
%%% API
%%%===================================================================
init(_Host, _Opts) ->
ejabberd_mnesia:create(?MODULE, last_activity,
[{disc_only_copies, [node()]},
{attributes, record_info(fields, last_activity)}]).
use_cache(Host) ->
case mnesia:table_info(last_activity, storage_type) of
disc_only_copies ->
mod_last_opt:use_cache(Host);
_ ->
false
end.
get_last(LUser, LServer) ->
case mnesia:dirty_read(last_activity, {LUser, LServer}) of
[] ->
error;
[#last_activity{timestamp = TimeStamp,
status = Status}] ->
{ok, {TimeStamp, Status}}
end.
store_last_info(LUser, LServer, TimeStamp, Status) ->
mnesia:dirty_write(#last_activity{us = {LUser, LServer},
timestamp = TimeStamp,
status = Status}).
remove_user(LUser, LServer) ->
US = {LUser, LServer},
mnesia:dirty_delete({last_activity, US}).
import(_LServer, #last_activity{} = LA) ->
mnesia:dirty_write(LA).
need_transform({last_activity, {U, S}, _, Status})
when is_list(U) orelse is_list(S) orelse is_list(Status) ->
?INFO_MSG("Mnesia table 'last_activity' will be converted to binary", []),
true;
need_transform(_) ->
false.
transform(#last_activity{us = {U, S}, status = Status} = R) ->
R#last_activity{us = {iolist_to_binary(U), iolist_to_binary(S)},
status = iolist_to_binary(Status)}.
%%%===================================================================
%%% Internal functions
%%%===================================================================
