src/lua/exec_media_script_ident.c

   1 /* libquvi
   2  * Copyright (C) 2012  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17  * 02110-1301  USA
  18  */
  19
  20 #include "config.h"
  21
  22 #include <lauxlib.h>
  23 #include <glib.h>
  24
  25 #include "quvi.h"
  26 /* -- */
  27 #include "_quvi_s.h"
  28 #include "_quvi_media_s.h"
  29 #include "_quvi_script_s.h"
  30 /* -- */
  31 #include "lua/getfield.h"
  32 #include "lua/setfield.h"
  33 #include "lua/chk.h"
  34 #include "lua/def.h"
  35
  36 /*
  37  * NOTE: The error messages produced in these functions are intended for
  38  * developers. They would typically be seen when a new media script is
  39  * being developed.
  40  *
  41  * The messages should be clear, indicating the actual error, minimizing
  42  * the time spent on locating the actual problem in the script.
  43  */
  44
  45 static const gchar script_func[] = "ident";
  46
  47 static QuviError _chk_results(lua_State *l, _quvi_script_t qs,
  48                               _quvi_media_t qm)
  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     luaL_error(l, "%s: function `%s' not found", qs->fpath->str, script_func);
  80
  81   lua_newtable(l);
  82   l_setfield_b(l, GS_VERBOSE, qm->handle.quvi->opt.scripts.verbose);
  83   l_setfield_s(l, MS_INPUT_URL, qm->url.input->str);
  84
  85   if (lua_pcall(l, 1, 1, 0))
  86     {
  87       g_string_assign(qm->handle.quvi->status.errmsg, lua_tostring(l, -1));
  88       return (QUVI_ERROR_SCRIPT);
  89     }
  90
  91   if (!lua_istable(l, -1))
  92     {
  93       luaL_error(l, "%s: %s: must return a dictionary",
  94                  qs->fpath->str, script_func);
  95     }
  96   return (_chk_results(l, qs, qm));
  97 }
  98
  99 /* vim: set ts=2 sw=2 tw=72 expandtab: */