/*
  This file is part of TALER
  Copyright (C) 2018 Taler Systems SA

  TALER 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.

  TALER 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 TALER; see the file COPYING.  If not, see
  <http://www.gnu.org/licenses/>
*/
/**
 * @file exchange-lib/testing_api_traits.c
 * @brief loop for trait resolution
 * @author Christian Grothoff
 * @author Marcello Stanisci
 */
#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "exchange_api_handle.h"
#include "taler_signatures.h"
#include "taler_testing_lib.h"


/**
 * End a trait array.  Usually, commands offer several traits,
 * and put them in arrays.
 */
struct TALER_TESTING_Trait
TALER_TESTING_trait_end ()
{
  struct TALER_TESTING_Trait end = {
    .index = 0,
    .trait_name = NULL,
    .ptr = NULL
  };

  return end;
}

/**
 * Pick the chosen trait from the traits array.
 *
 * @param traits the traits array.
 * @param ret where to store the result.
 * @param trait type of the trait to extract.
 * @param index index number of the object to extract.
 *
 * @return GNUNET_OK if no error occurred, GNUNET_SYSERR otherwise.
 */
int
TALER_TESTING_get_trait (const struct TALER_TESTING_Trait *traits,
                         void **ret,
                         const char *trait,
                         unsigned int index)
{
  for (unsigned int i=0; NULL != traits[i].trait_name; i++)
  {
    if ( (0 == strcmp (trait, traits[i].trait_name)) &&
         (index == traits[i].index) )
    {
      *ret = (void *) traits[i].ptr;
      return GNUNET_OK;
    }
  }
  GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
              "Trait %s/%u not found.\n",
              trait, index);

  return GNUNET_SYSERR;
}

/* end of testing_api_traits.c */