merchant

Merchant backend to process payments, run by merchants
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pg_lookup_order_by_fulfillment.c (2999B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2023 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_by_fulfillment.c
     18  * @brief Implementation of the lookup_order_by_fulfillment 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_by_fulfillment.h"
     26 #include "pg_helper.h"
     27 
     28 
     29 enum GNUNET_DB_QueryStatus
     30 TMH_PG_lookup_order_by_fulfillment (
     31   void *cls,
     32   const char *instance_id,
     33   const char *fulfillment_url,
     34   const char *session_id,
     35   bool allow_refunded_for_repurchase,
     36   char **order_id)
     37 {
     38   struct PostgresClosure *pg = cls;
     39   struct GNUNET_PQ_QueryParam params[] = {
     40     GNUNET_PQ_query_param_string (instance_id),
     41     GNUNET_PQ_query_param_string (fulfillment_url),
     42     GNUNET_PQ_query_param_string (session_id),
     43     GNUNET_PQ_query_param_bool (allow_refunded_for_repurchase),
     44     GNUNET_PQ_query_param_end
     45   };
     46   struct GNUNET_PQ_ResultSpec rs[] = {
     47     GNUNET_PQ_result_spec_string ("order_id",
     48                                   order_id),
     49     GNUNET_PQ_result_spec_end
     50   };
     51 
     52   check_connection (pg);
     53   PREPARE (pg,
     54            "lookup_order_by_fulfillment",
     55            "SELECT"
     56            "  mct.order_id"
     57            " FROM merchant_contract_terms mct"
     58            " LEFT JOIN merchant_refunds mref"
     59            "   USING (order_serial)"
     60            " WHERE fulfillment_url=$2"
     61            "   AND session_id=$3"
     62            "   AND merchant_serial="
     63            "        (SELECT merchant_serial"
     64            "           FROM merchant_instances"
     65            "          WHERE merchant_id=$1)"
     66            "   AND ((CAST($4 AS BOOL)) OR"
     67            "        mref.refund_serial IS NULL)"
     68            /* Theoretically, multiple paid orders
     69               for the same fulfillment URL could
     70               exist for this session_id -- if a
     71               wallet was broken and did multiple
     72               payments without repurchase detection.
     73               So we need to limit to 1 when returning! */
     74            " ORDER BY order_id DESC"
     75            " LIMIT 1;");
     76   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     77                                                    "lookup_order_by_fulfillment",
     78                                                    params,
     79                                                    rs);
     80 }