/*
  This file is part of TALER
  (C) 2020 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-delete-products-ID.c
 * @brief implement DELETE /products/$ID
 * @author Christian Grothoff
 */
#include "platform.h"
#include "taler-merchant-httpd_private-delete-products-ID.h"
#include <taler/taler_json_lib.h>


/**
 * Handle a DELETE "/products/$ID" request.
 *
 * @param rh context of the handler
 * @param connection the MHD connection to handle
 * @param[in,out] hc context with further information about the request
 * @return MHD result code
 */
MHD_RESULT
TMH_private_delete_products_ID (const struct TMH_RequestHandler *rh,
                                struct MHD_Connection *connection,
                                struct TMH_HandlerContext *hc)
{
  struct TMH_MerchantInstance *mi = hc->instance;
  enum GNUNET_DB_QueryStatus qs;

  (void) rh;
  GNUNET_assert (NULL != mi);
  GNUNET_assert (NULL != hc->infix);
  qs = TMH_db->delete_product (TMH_db->cls,
                               mi->settings.id,
                               hc->infix);
  switch (qs)
  {
  case GNUNET_DB_STATUS_HARD_ERROR:
    return TALER_MHD_reply_with_error (connection,
                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
                                       TALER_EC_GENERIC_DB_STORE_FAILED,
                                       "delete_product");
  case GNUNET_DB_STATUS_SOFT_ERROR:
    GNUNET_break (0);
    return TALER_MHD_reply_with_error (connection,
                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
                                       TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE,
                                       "delete_product (soft)");
  case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS:
    {
      size_t num_categories = 0;
      uint64_t *categories = NULL;

      /* check if deletion must have failed because of locks by
         checking if the product exists */
      qs = TMH_db->lookup_product (TMH_db->cls,
                                   mi->settings.id,
                                   hc->infix,
                                   NULL,
                                   &num_categories,
                                   &categories);
      if (GNUNET_DB_STATUS_HARD_ERROR == qs)
        return TALER_MHD_reply_with_error (connection,
                                           MHD_HTTP_INTERNAL_SERVER_ERROR,
                                           TALER_EC_GENERIC_DB_STORE_FAILED,
                                           "lookup_product");
      if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
        return TALER_MHD_reply_with_error (connection,
                                           MHD_HTTP_NOT_FOUND,
                                           TALER_EC_MERCHANT_GENERIC_PRODUCT_UNKNOWN,
                                           hc->infix);
      GNUNET_free (categories);
    }
    return TALER_MHD_reply_with_error (
      connection,
      MHD_HTTP_CONFLICT,
      TALER_EC_MERCHANT_PRIVATE_DELETE_PRODUCTS_CONFLICTING_LOCK,
      hc->infix);
  case GNUNET_DB_STATUS_SUCCESS_ONE_RESULT:
    return TALER_MHD_reply_static (connection,
                                   MHD_HTTP_NO_CONTENT,
                                   NULL,
                                   NULL,
                                   0);
  }
  GNUNET_assert (0);
  return MHD_NO;
}


/* end of taler-merchant-httpd_private-delete-products-ID.c */