/* This file is part of GNU Pies
   Copyright (C) 2015, 2017 Sergey Poznyakoff
  
   GNU Pies is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   GNU Pies 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GNU Pies.  If not, see <http://www.gnu.org/licenses/>. */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#include <grecs.h>
#include "libpies.h"
#include "grecsasrt.h"

int
assert_grecs_value_type (grecs_locus_t *locus,
			 const grecs_value_t *value, int type)
{
  if (GRECS_VALUE_EMPTY_P (value))
    {
      grecs_error (locus, 0, _("expected %s"),
		    grecs_data_type_string (type));
      return 1;
    }
  if (value->type != type)
    {
      grecs_error (locus, 0, _("expected %s, but found %s"),
		    grecs_data_type_string (type),
		    grecs_data_type_string (value->type));
      return 1;
    }
  return 0;
}

int
assert_scalar_stmt (grecs_locus_t *locus, enum grecs_callback_command cmd)
{
  if (cmd != grecs_callback_set_value)
    {
      grecs_error (locus, 0, _("unexpected block statement"));
      return 1;
    }
  return 0;
}

int
conf_callback_url (enum grecs_callback_command cmd,
		   grecs_locus_t *locus,
		   void *varptr, grecs_value_t *value, void *cb_data)
{
  struct pies_url *url;

  if (assert_scalar_stmt (locus, cmd)
      || assert_grecs_value_type (locus, value, GRECS_TYPE_STRING))
    return 1;
  if (pies_url_create (&url, value->v.string))
    {
      grecs_error (locus, 0, _("%s: cannot create URL: %s"),
		    value->v.string, strerror (errno));
      return 0;
    }
  if (varptr)
    *(struct pies_url **) varptr = url;
  else
    pies_url_destroy (&url);
  return 0;
}