mirror of
https://github.com/processone/ejabberd.git
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130 lines
3.7 KiB
Erlang
130 lines
3.7 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% @copyright (C) 2016, Evgeny Khramtsov
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%%% @doc
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%%%
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%%% @end
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%%% Created : 13 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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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/2]).
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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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mnesia:create_table(motd,
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[{disc_copies, [node()]},
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{attributes,
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record_info(fields, motd)}]),
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mnesia:create_table(motd_users,
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[{disc_copies, [node()]},
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{attributes,
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record_info(fields, motd_users)}]),
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update_tables().
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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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mnesia: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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mnesia: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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mnesia: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{}] -> true;
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_ -> 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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mnesia:transaction(F).
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import(_LServer, #motd{} = Motd) ->
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mnesia:dirty_write(Motd);
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import(_LServer, #motd_users{} = Users) ->
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mnesia:dirty_write(Users).
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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update_tables() ->
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update_motd_table(),
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update_motd_users_table().
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update_motd_table() ->
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Fields = record_info(fields, motd),
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case mnesia:table_info(motd, attributes) of
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Fields ->
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ejabberd_config:convert_table_to_binary(
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motd, Fields, set,
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fun(#motd{server = S}) -> S end,
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fun(#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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end);
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_ ->
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?INFO_MSG("Recreating motd table", []),
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mnesia:transform_table(motd, ignore, Fields)
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end.
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update_motd_users_table() ->
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Fields = record_info(fields, motd_users),
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case mnesia:table_info(motd_users, attributes) of
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Fields ->
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ejabberd_config:convert_table_to_binary(
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motd_users, Fields, set,
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fun(#motd_users{us = {U, _}}) -> U end,
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fun(#motd_users{us = {U, S}} = R) ->
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NewUS = {iolist_to_binary(U),
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iolist_to_binary(S)},
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R#motd_users{us = NewUS}
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end);
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_ ->
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?INFO_MSG("Recreating motd_users table", []),
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mnesia:transform_table(motd_users, ignore, Fields)
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end.
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