merchant

Merchant backend to process payments, run by merchants
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delete_order.c (2622B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2022, 2026 Taler Systems SA
      4 
      5    TALER is free software; you can redistribute it and/or modify it under the
      6    terms of the GNU General Public License as published by the Free Software
      7    Foundation; either version 3, or (at your option) any later version.
      8 
      9    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
     10    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     11    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
     12 
     13    You should have received a copy of the GNU General Public License along with
     14    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
     15  */
     16 /**
     17  * @file src/backenddb/delete_order.c
     18  * @brief Implementation of the delete_order function for Postgres
     19  * @author Iván Ávalos
     20  */
     21 #include "platform.h"
     22 #include <taler/taler_pq_lib.h>
     23 #include "merchant-database/delete_order.h"
     24 #include "helper.h"
     25 
     26 
     27 enum GNUNET_DB_QueryStatus
     28 TALER_MERCHANTDB_delete_order (
     29   struct TALER_MERCHANTDB_PostgresContext *pg,
     30   const char *instance_id,
     31   const char *order_id,
     32   bool force)
     33 {
     34   struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
     35   struct GNUNET_PQ_QueryParam params[] = {
     36     GNUNET_PQ_query_param_string (order_id),
     37     GNUNET_PQ_query_param_absolute_time (&now),
     38     GNUNET_PQ_query_param_bool (force),
     39     GNUNET_PQ_query_param_end
     40   };
     41   bool deleted;
     42   struct GNUNET_PQ_ResultSpec rs[] = {
     43     GNUNET_PQ_result_spec_bool ("deleted",
     44                                 &deleted),
     45     GNUNET_PQ_result_spec_end
     46   };
     47   enum GNUNET_DB_QueryStatus qs;
     48 
     49   GNUNET_assert (NULL != pg->current_merchant_id);
     50   GNUNET_assert (0 == strcmp (instance_id,
     51                               pg->current_merchant_id));
     52   /* Note: this MUST be a single stored procedure: deleting the order and
     53      the associated contract terms in two separate statements would run in
     54      two separate transactions (the caller does not open one), and a failure
     55      between them would orphan the contract terms. */
     56   TMH_PQ_prepare_anon (pg,
     57                        "SELECT"
     58                        " out_deleted AS deleted"
     59                        " FROM merchant_do_delete_order"
     60                        "($1,$2,$3);");
     61   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     62                                                  "",
     63                                                  params,
     64                                                  rs);
     65   if (qs <= 0)
     66     return qs;
     67   return deleted
     68          ? GNUNET_DB_STATUS_SUCCESS_ONE_RESULT
     69          : GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
     70 }