src/lua/exec_media_script_ident.c

   1 /* libquvi
   2  * Copyright (C) 2012  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_media_s.h"
  39 #include "_quvi_script_s.h"
  40 /* -- */
  41 #include "lua/getfield.h"
  42 #include "lua/setfield.h"
  43 #include "lua/chk.h"
  44 #include "lua/def.h"
  45
  46 static const gchar script_func[] = "ident";
  47
  48 static QuviError _chk_results(lua_State *l, _quvi_script_t qs)
  49 {
  50   QuviError r;
  51
  52   r = (l_chk_can_parse_url(l, qs, MS_CAN_PARSE_URL,
  53                            MS_DOMAINS, script_func) == TRUE)
  54       ? QUVI_OK
  55       : QUVI_ERROR_NO_SUPPORT;
  56
  57   lua_pop(l, 1);
  58   return (r);
  59 }
  60
  61 QuviError l_exec_media_script_ident(gpointer p, GSList *sl)
  62 {
  63   _quvi_script_t qs;
  64   _quvi_media_t qm;
  65   lua_State *l;
  66
  67   qm = (_quvi_media_t) p;
  68   l = qm->handle.quvi->handle.lua;
  69
  70   lua_pushnil(l);
  71   qs = (_quvi_script_t) sl->data;
  72
  73   if (luaL_dofile(l, qs->fpath->str))
  74     luaL_error(l, "%s", lua_tostring(l, -1));
  75
  76   lua_getglobal(l, script_func);
  77
  78   if (!lua_isfunction(l, -1))
  79     {
  80       luaL_error(l, "%s: the function `%s' was not found",
  81                  qs->fpath->str, script_func);
  82     }
  83
  84   lua_newtable(l);
  85   l_setfield_s(l, MS_INPUT_URL, qm->url.input->str, -1);
  86
  87   if (lua_pcall(l, 1, 1, 0))
  88     {
  89       g_string_assign(qm->handle.quvi->status.errmsg, lua_tostring(l, -1));
  90       return (QUVI_ERROR_SCRIPT);
  91     }
  92
  93   if (!lua_istable(l, -1))
  94     {
  95       luaL_error(l, "%s: %s: must return a dictionary",
  96                  qs->fpath->str, script_func);
  97     }
  98   return (_chk_results(l, qs));
  99 }
 100
 101 /* vim: set ts=2 sw=2 tw=72 expandtab: */