src/lua/exec_subtitle_export_script_export.c

   1 /* libquvi
   2  * Copyright (C) 2013  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This file is part of libquvi <http://quvi.sourceforge.net/>.
   5  *
   6  * This library is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU Affero General Public
   8  * License as published by the Free Software Foundation, either
   9  * version 3 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General
  17  * Public License along with this library.  If not, see
  18  * <http://www.gnu.org/licenses/>.
  19  */
  20
  21 /*
  22  * NOTE: The error messages produced in these functions are intended for
  23  *       developers. They would typically be seen when a new script is
  24  *       being developed or an old one is being maintained.
  25  *
  26  *       These messages should be clear, indicating the actual error,
  27  *       minimizing the time spent on locating the problem in the script.
  28  */
  29
  30 #include "config.h"
  31
  32 #include <lauxlib.h>
  33 #include <glib.h>
  34
  35 #include "quvi.h"
  36 /* -- */
  37 #include "_quvi_s.h"
  38 #include "_quvi_subtitle_export_s.h"
  39 #include "_quvi_subtitle_s.h"
  40 #include "_quvi_script_s.h"
  41 /* -- */
  42 #include "misc/subtitle_export.h"
  43 #include "lua/setfield.h"
  44 #include "lua/chk.h"
  45 #include "lua/def.h"
  46
  47 static const gchar script_func[] = "export";
  48
  49 static QuviError _chk_result(lua_State *l, _quvi_subtitle_export_t qse,
  50                              const gchar *script_fpath)
  51 {
  52   lua_pushnil(l);
  53   while (lua_next(l, LI_KEY))
  54     {
  55       l_chk_assign_s(l, SUES_DATA, qse->data, FALSE, FALSE);
  56       lua_pop(l, 1);
  57     }
  58
  59   if (qse->data->len ==0)
  60     {
  61       luaL_error(l, "%s: %s: must return `qargs.data'",
  62                  script_fpath, script_func);
  63     }
  64   lua_pop(l, 1);
  65   return (QUVI_OK);
  66 }
  67
  68 QuviError l_exec_subtitle_export_script_export(gpointer p, GSList *sl)
  69 {
  70   _quvi_subtitle_export_t qse;
  71   _quvi_script_t qs;
  72   lua_State *l;
  73
  74   qse = (_quvi_subtitle_export_t) p;
  75   l = qse->handle.quvi->handle.lua;
  76
  77   qs = (_quvi_script_t) sl->data;
  78   lua_getglobal(l, script_func);
  79
  80   if (!lua_isfunction(l, -1))
  81     {
  82       luaL_error(l, "%s: the function `%s' was not found",
  83                  qs->fpath->str, script_func);
  84     }
  85
  86   lua_newtable(l);
  87   l_set_reg_userdata(l, USERDATA_QUVI_T, (gpointer) qse->handle.quvi);
  88   l_setfield_s(l, SUES_INPUT_URL, qse->url.input->str, -1);
  89   l_setfield_n(l, SUES_FROM_FORMAT, qse->format.from);
  90
  91   if (lua_pcall(l, 1, 1, 0))
  92     {
  93       g_string_assign(qse->handle.quvi->status.errmsg, lua_tostring(l, -1));
  94       return (QUVI_ERROR_SCRIPT);
  95     }
  96
  97   if (!lua_istable(l, -1))
  98     {
  99       luaL_error(l, "%s: %s: must return a dictionary, this is "
 100                  "typically the `qargs'", qs->fpath->str, script_func);
 101     }
 102   return (_chk_result(l, qse, qs->fpath->str));
 103 }
 104
 105 /* vim: set ts=2 sw=2 tw=72 expandtab: */