Blame src/lua/exec_subtitle_export_script_export.c

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/* libquvi
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 * Copyright (C) 2013  Toni Gundogdu <legatvs@gmail.com>
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 *
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 * This file is part of libquvi <http://quvi.sourceforge.net/>.
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 *
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 * This library is free software: you can redistribute it and/or
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 * modify it under the terms of the GNU Affero General Public
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 * License as published by the Free Software Foundation, either
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 * version 3 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU Affero General Public License for more details.
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 *
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 * You should have received a copy of the GNU Affero General
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 * Public License along with this library.  If not, see
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 * <http://www.gnu.org/licenses/>.
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 */
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/*
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 * NOTE: The error messages produced in these functions are intended for
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 *       developers. They would typically be seen when a new script is
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 *       being developed or an old one is being maintained.
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 *
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 *       These messages should be clear, indicating the actual error,
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 *       minimizing the time spent on locating the problem in the script.
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 */
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#include "config.h"
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#include <lauxlib.h>
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#include <glib.h>
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#include "quvi.h"
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/* -- */
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#include "_quvi_s.h"
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#include "_quvi_subtitle_export_s.h"
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#include "_quvi_subtitle_s.h"
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#include "_quvi_script_s.h"
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/* -- */
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#include "misc/subtitle_export.h"
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#include "lua/setfield.h"
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#include "lua/chk.h"
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#include "lua/def.h"
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static const gchar script_func[] = "export";
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static QuviError _chk_result(lua_State *l, _quvi_subtitle_export_t qse,
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                             const gchar *script_fpath)
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{
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  lua_pushnil(l);
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  while (lua_next(l, LI_KEY))
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    {
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      l_chk_assign_s(l, SUES_DATA, qse->data, FALSE, FALSE);
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      lua_pop(l, 1);
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    }
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  if (qse->data->len ==0)
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    {
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      luaL_error(l, "%s: %s: must return `qargs.data'",
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                 script_fpath, script_func);
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    }
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  lua_pop(l, 1);
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  return (QUVI_OK);
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}
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QuviError l_exec_subtitle_export_script_export(gpointer p, GSList *sl)
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{
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  _quvi_subtitle_export_t qse;
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  _quvi_script_t qs;
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  lua_State *l;
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  qse = (_quvi_subtitle_export_t) p;
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  l = qse->handle.quvi->handle.lua;
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  qs = (_quvi_script_t) sl->data;
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  lua_getglobal(l, script_func);
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  if (!lua_isfunction(l, -1))
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    {
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      luaL_error(l, "%s: the function `%s' was not found",
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                 qs->fpath->str, script_func);
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    }
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  lua_newtable(l);
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  l_set_reg_userdata(l, USERDATA_QUVI_T, (gpointer) qse->handle.quvi);
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  l_setfield_s(l, SUES_INPUT_URL, qse->url.input->str, -1);
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  l_setfield_n(l, SUES_FROM_FORMAT, qse->format.from);
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  if (lua_pcall(l, 1, 1, 0))
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    {
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      g_string_assign(qse->handle.quvi->status.errmsg, lua_tostring(l, -1));
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      return (QUVI_ERROR_SCRIPT);
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    }
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  if (!lua_istable(l, -1))
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    {
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      luaL_error(l, "%s: %s: must return a dictionary, this is "
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                 "typically the `qargs'", qs->fpath->str, script_func);
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    }
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  return (_chk_result(l, qse, qs->fpath->str));
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}
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/* vim: set ts=2 sw=2 tw=72 expandtab: */