%%%-------------------------------------------------------------------
%%% File    : mod_irc_sql.erl
%%% Author  : Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% Created : 14 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2016   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_irc_sql).

-compile([{parse_transform, ejabberd_sql_pt}]).

-behaviour(mod_irc).

%% API
-export([init/2, get_data/3, set_data/4, import/1, import/2, export/1]).

-include("jid.hrl").
-include("mod_irc.hrl").
-include("ejabberd_sql_pt.hrl").

%%%===================================================================
%%% API
%%%===================================================================
init(_Host, _Opts) ->
    ok.

get_data(LServer, Host, From) ->
    SJID = jid:to_string(jid:tolower(jid:remove_resource(From))),
    case catch ejabberd_sql:sql_query(
                 LServer,
                 ?SQL("select @(data)s from irc_custom"
                      " where jid=%(SJID)s and host=%(Host)s")) of
        {selected, [{SData}]} ->
            mod_irc:data_to_binary(From, ejabberd_sql:decode_term(SData));
        {'EXIT', _} -> error;
        {selected, _} -> empty
    end.

set_data(LServer, Host, From, Data) ->
    SJID = jid:to_string(jid:tolower(jid:remove_resource(From))),
    SData = jlib:term_to_expr(Data),
    F = fun () ->
                ?SQL_UPSERT_T(
                   "irc_custom",
                   ["!jid=%(SJID)s",
                    "!host=%(Host)s",
                    "data=%(SData)s"]),
		ok
	end,
    ejabberd_sql:sql_transaction(LServer, F).

export(_Server) ->
    [{irc_custom,
      fun(Host, #irc_custom{us_host = {{U, S}, IRCHost},
                            data = Data}) ->
              case str:suffix(Host, IRCHost) of
                  true ->
                      SJID = jid:to_string(jid:make(U, S, <<"">>)),
                      SData = jlib:term_to_expr(Data),
                      [?SQL("delete from irc_custom"
                            " where jid=%(SJID)s and host=%(IRCHost)s;"),
                       ?SQL("insert into irc_custom(jid, host, data)"
                            " values (%(SJID)s, %(IRCHost)s, %(SData)s);")];
                  false ->
                      []
              end
      end}].

import(_LServer) ->
    [{<<"select jid, host, data from irc_custom;">>,
      fun([SJID, IRCHost, SData]) ->
              #jid{luser = U, lserver = S} = jid:from_string(SJID),
              Data = ejabberd_sql:decode_term(SData),
              #irc_custom{us_host = {{U, S}, IRCHost},
                          data = Data}
      end}].

import(_, _) ->
    pass.

%%%===================================================================
%%% Internal functions
%%%===================================================================