merchant

Merchant backend to process payments, run by merchants
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insert_inventory_lock.c (2761B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2022 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/insert_inventory_lock.c
     18  * @brief Implementation of the insert_inventory_lock function for Postgres
     19  * @author Iván Ávalos
     20  */
     21 #include "platform.h"
     22 #include <taler/taler_pq_lib.h>
     23 #include "merchant-database/insert_inventory_lock.h"
     24 #include "helper.h"
     25 
     26 
     27 enum GNUNET_DB_QueryStatus
     28 TALER_MERCHANTDB_insert_inventory_lock (
     29   struct TALER_MERCHANTDB_PostgresContext *pg,
     30   const char *instance_id,
     31   const char *product_id,
     32   const struct GNUNET_Uuid *uuid,
     33   uint64_t quantity,
     34   uint32_t quantity_frac,
     35   struct GNUNET_TIME_Timestamp expiration_time)
     36 {
     37   struct GNUNET_PQ_QueryParam params[] = {
     38     GNUNET_PQ_query_param_string (product_id),
     39     GNUNET_PQ_query_param_auto_from_type (uuid),
     40     GNUNET_PQ_query_param_uint64 (&quantity),
     41     GNUNET_PQ_query_param_uint32 (&quantity_frac),
     42     GNUNET_PQ_query_param_timestamp (&expiration_time),
     43     GNUNET_PQ_query_param_end
     44   };
     45   bool no_product = false;
     46   bool insufficient_stock = false;
     47   struct GNUNET_PQ_ResultSpec rs[] = {
     48     GNUNET_PQ_result_spec_bool ("out_no_product",
     49                                 &no_product),
     50     GNUNET_PQ_result_spec_bool ("out_insufficient_stock",
     51                                 &insufficient_stock),
     52     GNUNET_PQ_result_spec_end
     53   };
     54   enum GNUNET_DB_QueryStatus qs;
     55 
     56   GNUNET_assert (NULL != pg->current_merchant_id);
     57   GNUNET_assert (0 == strcmp (instance_id,
     58                               pg->current_merchant_id));
     59   TMH_PQ_prepare_anon (pg,
     60                        "SELECT"
     61                        "  out_no_product"
     62                        " ,out_insufficient_stock"
     63                        "  FROM merchant_do_insert_inventory_lock"
     64                        " ($1, $2, $3, $4, $5);");
     65   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     66                                                  "",
     67                                                  params,
     68                                                  rs);
     69   if (qs <= 0)
     70     return qs;
     71   if (no_product || insufficient_stock)
     72     return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
     73   return qs;
     74 }