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%%%-------------------------------------------------------------------
%%% File : mod_announce_sql.erl
%%% Author : Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% Created : 13 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2017 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_announce_sql).
-behaviour(mod_announce).
-compile([{parse_transform, ejabberd_sql_pt}]).
%% API
-export([init/2, set_motd_users/2, set_motd/2, delete_motd/1,
get_motd/1, is_motd_user/2, set_motd_user/2, import/3,
export/1]).
-include("xmpp.hrl").
-include("mod_announce.hrl").
-include("ejabberd_sql_pt.hrl").
-include("logger.hrl").
%%%===================================================================
%%% API
%%%===================================================================
init(_Host, _Opts) ->
ok.
set_motd_users(LServer, USRs) ->
F = fun() ->
lists:foreach(
fun({U, _S, _R}) ->
?SQL_UPSERT_T(
"motd",
["!username=%(U)s",
"xml=''"])
end, USRs)
end,
transaction(LServer, F).
set_motd(LServer, Packet) ->
XML = fxml:element_to_binary(Packet),
F = fun() ->
?SQL_UPSERT_T(
"motd",
["!username=''",
"xml=%(XML)s"])
end,
transaction(LServer, F).
delete_motd(LServer) ->
F = fun() ->
ejabberd_sql:sql_query_t(?SQL("delete from motd"))
end,
transaction(LServer, F).
get_motd(LServer) ->
case catch ejabberd_sql:sql_query(
LServer,
?SQL("select @(xml)s from motd where username=''")) of
{selected, [{XML}]} ->
parse_element(XML);
{selected, []} ->
error;
_ ->
{error, db_failure}
end.
is_motd_user(LUser, LServer) ->
case catch ejabberd_sql:sql_query(
LServer,
?SQL("select @(username)s from motd"
" where username=%(LUser)s")) of
{selected, [_|_]} ->
{ok, true};
{selected, []} ->
{ok, false};
_ ->
{error, db_failure}
end.
set_motd_user(LUser, LServer) ->
F = fun() ->
?SQL_UPSERT_T(
"motd",
["!username=%(LUser)s",
"xml=''"])
end,
transaction(LServer, F).
export(_Server) ->
[{motd,
fun(Host, #motd{server = LServer, packet = El})
when LServer == Host ->
XML = fxml:element_to_binary(El),
[?SQL("delete from motd where username='';"),
?SQL("insert into motd(username, xml) values ('', %(XML)s);")];
(_Host, _R) ->
[]
end},
{motd_users,
fun(Host, #motd_users{us = {LUser, LServer}})
when LServer == Host, LUser /= <<"">> ->
[?SQL("delete from motd where username=%(LUser)s;"),
?SQL("insert into motd(username, xml) values (%(LUser)s, '');")];
(_Host, _R) ->
[]
end}].
import(_, _, _) ->
ok.
%%%===================================================================
%%% Internal functions
%%%===================================================================
transaction(LServer, F) ->
case ejabberd_sql:sql_transaction(LServer, F) of
{atomic, _} -> ok;
_ -> {error, db_failure}
end.
parse_element(XML) ->
case fxml_stream:parse_element(XML) of
El when is_record(El, xmlel) ->
{ok, El};
_ ->
?ERROR_MSG("malformed XML element in SQL table "
"'motd' for username='': ~s", [XML]),
{error, db_failure}
end.
|
