merchant

Merchant backend to process payments, run by merchants
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pg_lookup_order.c (3287B)

      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 backenddb/pg_lookup_order.c
     18  * @brief Implementation of the lookup_order function for Postgres
     19  * @author Iván Ávalos
     20  */
     21 #include "platform.h"
     22 #include <taler/taler_error_codes.h>
     23 #include <taler/taler_dbevents.h>
     24 #include <taler/taler_pq_lib.h>
     25 #include "pg_lookup_order.h"
     26 #include "pg_helper.h"
     27 
     28 enum GNUNET_DB_QueryStatus
     29 TMH_PG_lookup_order (void *cls,
     30                      const char *instance_id,
     31                      const char *order_id,
     32                      struct TALER_ClaimTokenP *claim_token,
     33                      struct TALER_MerchantPostDataHashP *h_post_data,
     34                      json_t **contract_terms)
     35 {
     36   struct PostgresClosure *pg = cls;
     37   json_t *j;
     38   struct TALER_ClaimTokenP ct;
     39   enum GNUNET_DB_QueryStatus qs;
     40   struct GNUNET_PQ_QueryParam params[] = {
     41     GNUNET_PQ_query_param_string (instance_id),
     42     GNUNET_PQ_query_param_string (order_id),
     43     GNUNET_PQ_query_param_end
     44   };
     45   struct GNUNET_PQ_ResultSpec rs[] = {
     46     TALER_PQ_result_spec_json ("contract_terms",
     47                                &j),
     48     GNUNET_PQ_result_spec_auto_from_type ("claim_token",
     49                                           &ct),
     50     GNUNET_PQ_result_spec_auto_from_type ("h_post_data",
     51                                           h_post_data),
     52     GNUNET_PQ_result_spec_end
     53   };
     54 
     55   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
     56               "Finding contract term, order_id: '%s', instance_id: '%s'.\n",
     57               order_id,
     58               instance_id);
     59   check_connection (pg);
     60   PREPARE (pg,
     61            "lookup_order",
     62            "SELECT"
     63            " contract_terms::TEXT"
     64            ",claim_token"
     65            ",h_post_data"
     66            ",pos_key"
     67            " FROM merchant_orders"
     68            " WHERE merchant_orders.merchant_serial="
     69            "     (SELECT merchant_serial "
     70            "        FROM merchant_instances"
     71            "        WHERE merchant_id=$1)"
     72            "   AND merchant_orders.order_id=$2");
     73   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     74                                                  "lookup_order",
     75                                                  params,
     76                                                  rs);
     77   if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qs)
     78   {
     79     if (NULL != contract_terms)
     80       *contract_terms = j;
     81     else
     82       json_decref (j);
     83     if (NULL != claim_token)
     84       *claim_token = ct;
     85   }
     86   else
     87   {
     88     /* just to be safe: NULL it */
     89     if (NULL != contract_terms)
     90       *contract_terms = NULL;
     91     if (NULL != claim_token)
     92       *claim_token = (struct TALER_ClaimTokenP) { 0 }
     93     ;
     94   }
     95   return qs;
     96 }