/*
  This file is part of TALER
  (C) 2024 Taler Systems SA

  TALER is free software; you can redistribute it and/or modify it under the
  terms of the GNU Affero 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 taler-merchant-httpd_private-get-categories.c
 * @brief implement GET /categories
 * @author Christian Grothoff
 */
#include "platform.h"
#include "taler-merchant-httpd_private-get-categories.h"


/**
 * Add category details to our JSON array.
 *
 * @param cls a `json_t *` JSON array to build
 * @param category_id ID of the category
 * @param category_name name of the category
 * @param category_name_i18n translations of the @a category_name
 * @param product_count number of products in the category
 */
static void
add_category (void *cls,
              uint64_t category_id,
              const char *category_name,
              const json_t *category_name_i18n,
              uint64_t product_count)
{
  json_t *pa = cls;

  GNUNET_assert (
    0 ==
    json_array_append_new (
      pa,
      GNUNET_JSON_PACK (
        GNUNET_JSON_pack_uint64 (
          "category_id",
          category_id),
        GNUNET_JSON_pack_string (
          "name",
          category_name),
        GNUNET_JSON_pack_object_incref (
          "name_i18n",
          (json_t *) category_name_i18n),
        GNUNET_JSON_pack_uint64 (
          "product_count",
          product_count))));
}


MHD_RESULT
TMH_private_get_categories (const struct TMH_RequestHandler *rh,
                            struct MHD_Connection *connection,
                            struct TMH_HandlerContext *hc)
{
  json_t *pa;
  enum GNUNET_DB_QueryStatus qs;

  pa = json_array ();
  GNUNET_assert (NULL != pa);
  qs = TMH_db->lookup_categories (TMH_db->cls,
                                  hc->instance->settings.id,
                                  &add_category,
                                  pa);
  if (0 > qs)
  {
    GNUNET_break (0);
    json_decref (pa);
    return TALER_MHD_reply_with_error (connection,
                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
                                       TALER_EC_GENERIC_DB_FETCH_FAILED,
                                       NULL);
  }
  return TALER_MHD_REPLY_JSON_PACK (connection,
                                    MHD_HTTP_OK,
                                    GNUNET_JSON_pack_array_steal ("categories",
                                                                  pa));
}


/* end of taler-merchant-httpd_private-get-categories.c */