%%%-------------------------------------------------------------------
%%% File : mod_privacy_mnesia.erl
%%% Author : Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% Created : 14 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_privacy_mnesia).
-behaviour(mod_privacy).
%% API
-export([init/2, set_default/3, unset_default/2, set_lists/1,
set_list/4, get_lists/2, get_list/3, remove_lists/2,
remove_list/3, use_cache/1, import/1]).
-export([need_transform/1, transform/1]).
-include_lib("xmpp/include/xmpp.hrl").
-include("mod_privacy.hrl").
-include("logger.hrl").
%%%===================================================================
%%% API
%%%===================================================================
init(_Host, _Opts) ->
ejabberd_mnesia:create(?MODULE, privacy,
[{disc_only_copies, [node()]},
{attributes, record_info(fields, privacy)}]).
use_cache(Host) ->
case mnesia:table_info(privacy, storage_type) of
disc_only_copies ->
mod_privacy_opt:use_cache(Host);
_ ->
false
end.
unset_default(LUser, LServer) ->
F = fun () ->
case mnesia:read({privacy, {LUser, LServer}}) of
[] -> ok;
[R] -> mnesia:write(R#privacy{default = none})
end
end,
transaction(F).
set_default(LUser, LServer, Name) ->
F = fun () ->
case mnesia:read({privacy, {LUser, LServer}}) of
[] ->
{error, notfound};
[#privacy{lists = Lists} = P] ->
case lists:keymember(Name, 1, Lists) of
true ->
mnesia:write(P#privacy{default = Name,
lists = Lists});
false ->
{error, notfound}
end
end
end,
transaction(F).
remove_list(LUser, LServer, Name) ->
F = fun () ->
case mnesia:read({privacy, {LUser, LServer}}) of
[] ->
{error, notfound};
[#privacy{default = Default, lists = Lists} = P] ->
if Name == Default ->
{error, conflict};
true ->
NewLists = lists:keydelete(Name, 1, Lists),
mnesia:write(P#privacy{lists = NewLists})
end
end
end,
transaction(F).
set_lists(Privacy) ->
mnesia:dirty_write(Privacy).
set_list(LUser, LServer, Name, List) ->
F = fun () ->
case mnesia:wread({privacy, {LUser, LServer}}) of
[] ->
NewLists = [{Name, List}],
mnesia:write(#privacy{us = {LUser, LServer},
lists = NewLists});
[#privacy{lists = Lists} = P] ->
NewLists1 = lists:keydelete(Name, 1, Lists),
NewLists = [{Name, List} | NewLists1],
mnesia:write(P#privacy{lists = NewLists})
end
end,
transaction(F).
get_list(LUser, LServer, Name) ->
case mnesia:dirty_read(privacy, {LUser, LServer}) of
[#privacy{default = Default, lists = Lists}] when Name == default ->
case lists:keyfind(Default, 1, Lists) of
{_, List} -> {ok, {Default, List}};
false -> error
end;
[#privacy{lists = Lists}] ->
case lists:keyfind(Name, 1, Lists) of
{_, List} -> {ok, {Name, List}};
false -> error
end;
[] ->
error
end.
get_lists(LUser, LServer) ->
case mnesia:dirty_read(privacy, {LUser, LServer}) of
[#privacy{} = P] ->
{ok, P};
_ ->
error
end.
remove_lists(LUser, LServer) ->
F = fun () -> mnesia:delete({privacy, {LUser, LServer}}) end,
transaction(F).
import(#privacy{} = P) ->
mnesia:dirty_write(P).
need_transform({privacy, {U, S}, _, _}) when is_list(U) orelse is_list(S) ->
?INFO_MSG("Mnesia table 'privacy' will be converted to binary", []),
true;
need_transform(_) ->
false.
transform(#privacy{us = {U, S}, default = Def, lists = Lists} = R) ->
NewLists = lists:map(
fun({Name, Ls}) ->
NewLs = lists:map(
fun(#listitem{value = Val} = L) ->
NewVal = case Val of
{LU, LS, LR} ->
{iolist_to_binary(LU),
iolist_to_binary(LS),
iolist_to_binary(LR)};
none -> none;
both -> both;
from -> from;
to -> to;
_ -> iolist_to_binary(Val)
end,
L#listitem{value = NewVal}
end, Ls),
{iolist_to_binary(Name), NewLs}
end, Lists),
NewDef = case Def of
none -> none;
_ -> iolist_to_binary(Def)
end,
NewUS = {iolist_to_binary(U), iolist_to_binary(S)},
R#privacy{us = NewUS, default = NewDef, lists = NewLists}.
%%%===================================================================
%%% Internal functions
%%%===================================================================
transaction(F) ->
case mnesia:transaction(F) of
{atomic, Result} ->
Result;
{aborted, Reason} ->
?ERROR_MSG("Mnesia transaction failed: ~p", [Reason]),
{error, db_failure}
end.
