%%%----------------------------------------------------------------------
%%% File : translate.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Localization helper
%%% Created : 6 Jan 2003 by Alexey Shchepin <alexey@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(translate).
-author('alexey@process-one.net').
-export([start/0, load_dir/1, load_file/2,
translate/2]).
-include("ejabberd.hrl").
-include("logger.hrl").
start() ->
ets:new(translations, [named_table, public]),
Dir = case os:getenv("EJABBERD_MSGS_PATH") of
false ->
case code:priv_dir(ejabberd) of
{error, _} -> ?MSGS_DIR;
Path -> filename:join([Path, "msgs"])
end;
Path -> Path
end,
load_dir(iolist_to_binary(Dir)),
ok.
-spec load_dir(binary()) -> ok.
load_dir(Dir) ->
case file:list_dir(Dir) of
{ok, Files} ->
MsgFiles = lists:filter(fun (FN) ->
case length(FN) > 4 of
true ->
string:substr(FN, length(FN) - 3)
== ".msg";
_ -> false
end
end,
Files),
lists:foreach(fun (FNS) ->
FN = list_to_binary(FNS),
LP = ascii_tolower(str:substr(FN, 1,
byte_size(FN) - 4)),
L = case str:tokens(LP, <<".">>) of
[Language] -> Language;
[Language, _Project] -> Language
end,
load_file(L, <<Dir/binary, "/", FN/binary>>)
end,
MsgFiles),
ok;
{error, Reason} -> ?ERROR_MSG("~p", [Reason])
end.
load_file(Lang, File) ->
case file:open(File, [read]) of
{ok, Fd} ->
io:setopts(Fd, [{encoding,latin1}]),
load_file_loop(Fd, 1, File, Lang),
file:close(Fd);
{error, Error} ->
ExitText = iolist_to_binary([File, ": ",
file:format_error(Error)]),
?ERROR_MSG("Problem loading translation file ~n~s",
[ExitText]),
exit(ExitText)
end.
load_file_loop(Fd, Line, File, Lang) ->
case io:read(Fd, '', Line) of
{ok,{Orig, Trans}, NextLine} ->
Trans1 = case Trans of
<<"">> -> Orig;
_ -> Trans
end,
ets:insert(translations,
{{Lang, iolist_to_binary(Orig)},
iolist_to_binary(Trans1)}),
load_file_loop(Fd, NextLine, File, Lang);
{ok,_, _NextLine} ->
ExitText = iolist_to_binary([File,
" approximately in the line ",
Line]),
?ERROR_MSG("Problem loading translation file ~n~s",
[ExitText]),
exit(ExitText);
{error,
{_LineNumber, erl_parse, _ParseMessage} = Reason} ->
ExitText = iolist_to_binary([File,
" approximately in the line ",
file:format_error(Reason)]),
?ERROR_MSG("Problem loading translation file ~n~s",
[ExitText]),
exit(ExitText);
{error, Reason} ->
ExitText = iolist_to_binary([File, ": ",
file:format_error(Reason)]),
?ERROR_MSG("Problem loading translation file ~n~s",
[ExitText]),
exit(ExitText);
{eof,_Line} ->
ok
end.
-spec translate(binary(), binary()) -> binary().
translate(Lang, Msg) ->
LLang = ascii_tolower(Lang),
case ets:lookup(translations, {LLang, Msg}) of
[{_, Trans}] -> Trans;
_ ->
ShortLang = case str:tokens(LLang, <<"-">>) of
[] -> LLang;
[SL | _] -> SL
end,
case ShortLang of
<<"en">> -> Msg;
LLang -> translate(Msg);
_ ->
case ets:lookup(translations, {ShortLang, Msg}) of
[{_, Trans}] -> Trans;
_ -> translate(Msg)
end
end
end.
translate(Msg) ->
case ?MYLANG of
<<"en">> -> Msg;
Lang ->
LLang = ascii_tolower(Lang),
case ets:lookup(translations, {LLang, Msg}) of
[{_, Trans}] -> Trans;
_ ->
ShortLang = case str:tokens(LLang, <<"-">>) of
[] -> LLang;
[SL | _] -> SL
end,
case ShortLang of
<<"en">> -> Msg;
Lang -> Msg;
_ ->
case ets:lookup(translations, {ShortLang, Msg}) of
[{_, Trans}] -> Trans;
_ -> Msg
end
end
end
end.
ascii_tolower(B) ->
iolist_to_binary(ascii_tolower_s(binary_to_list(B))).
ascii_tolower_s([C | Cs]) when C >= $A, C =< $Z ->
[C + ($a - $A) | ascii_tolower_s(Cs)];
ascii_tolower_s([C | Cs]) -> [C | ascii_tolower_s(Cs)];
ascii_tolower_s([]) -> [].
