/* libquvi

 * Copyright (C) 2012  Toni Gundogdu <legatvs@gmail.com>

 *

 * This file is part of libquvi <http://quvi.sourceforge.net/>.

 *

 * This library is free software: you can redistribute it and/or

 * modify it under the terms of the GNU Affero General Public

 * License as published by the Free Software Foundation, either

 * version 3 of the License, or (at your option) any later version.

 *

 * This library 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 Affero General Public License for more details.

 *

 * You should have received a copy of the GNU Affero General

 * Public License along with this library.  If not, see

 * <http://www.gnu.org/licenses/>.

 */

/*

 * NOTE: The error messages produced in these functions are intended for

 *       developers. They would typically be seen when a new script is

 *       being developed or an old one is being maintained.

 *

 *       These messages should be clear, indicating the actual error,

 *       minimizing the time spent on locating the problem in the script.

 */

#include "config.h"

#include <lauxlib.h>

#include <glib.h>

#include "quvi.h"

/* -- */

#include "_quvi_s.h"

#include "_quvi_media_s.h"

#include "_quvi_script_s.h"

/* -- */

#include "lua/getfield.h"

#include "lua/setfield.h"

#include "lua/chk.h"

#include "lua/def.h"

static const gchar script_func[] = "ident";

static QuviError _chk_results(lua_State *l, _quvi_script_t qs)

{

  QuviError r;

  r = (l_chk_can_parse_url(l, qs, MS_CAN_PARSE_URL,

                           MS_DOMAINS, script_func) == TRUE)

      ? QUVI_OK

      : QUVI_ERROR_NO_SUPPORT;

  lua_pop(l, 1);

  return (r);

}

QuviError l_exec_media_script_ident(gpointer p, GSList *sl)

{

  _quvi_script_t qs;

  _quvi_media_t qm;

  lua_State *l;

  qm = (_quvi_media_t) p;

  l = qm->handle.quvi->handle.lua;

  lua_pushnil(l);

  qs = (_quvi_script_t) sl->data;

  if (luaL_dofile(l, qs->fpath->str))

    luaL_error(l, "%s", lua_tostring(l, -1));

  lua_getglobal(l, script_func);

  if (!lua_isfunction(l, -1))

    {

      luaL_error(l, "%s: the function `%s' was not found",

                 qs->fpath->str, script_func);

    }

  lua_newtable(l);

  l_setfield_s(l, MS_INPUT_URL, qm->url.input->str, -1);

  if (lua_pcall(l, 1, 1, 0))

    {

      g_string_assign(qm->handle.quvi->status.errmsg, lua_tostring(l, -1));

      return (QUVI_ERROR_SCRIPT);

    }

  if (!lua_istable(l, -1))

    {

      luaL_error(l, "%s: %s: must return a dictionary",

                 qs->fpath->str, script_func);

    }

  return (_chk_results(l, qs));

}

/* vim: set ts=2 sw=2 tw=72 expandtab: */