Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2022-2023 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 exchangedb/pg_select_refunds_by_coin.c
      18             :  * @brief Implementation of the select_refunds_by_coin function for Postgres
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "taler/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_select_refunds_by_coin.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Closure for #get_refunds_cb().
      31             :  */
      32             : struct SelectRefundContext
      33             : {
      34             :   /**
      35             :    * Function to call on each result.
      36             :    */
      37             :   TALER_EXCHANGEDB_RefundCoinCallback cb;
      38             : 
      39             :   /**
      40             :    * Closure for @a cb.
      41             :    */
      42             :   void *cb_cls;
      43             : 
      44             :   /**
      45             :    * Plugin context.
      46             :    */
      47             :   struct PostgresClosure *pg;
      48             : 
      49             :   /**
      50             :    * Set to #GNUNET_SYSERR on error.
      51             :    */
      52             :   enum GNUNET_GenericReturnValue status;
      53             : };
      54             : 
      55             : 
      56             : /**
      57             :  * Function to be called with the results of a SELECT statement
      58             :  * that has returned @a num_results results.
      59             :  *
      60             :  * @param cls closure of type `struct SelectRefundContext *`
      61             :  * @param result the postgres result
      62             :  * @param num_results the number of results in @a result
      63             :  */
      64             : static void
      65          17 : get_refunds_cb (void *cls,
      66             :                 PGresult *result,
      67             :                 unsigned int num_results)
      68             : {
      69          17 :   struct SelectRefundContext *srctx = cls;
      70          17 :   struct PostgresClosure *pg = srctx->pg;
      71             : 
      72          17 :   for (unsigned int i = 0; i<num_results; i++)
      73             :   {
      74             :     struct TALER_Amount amount_with_fee;
      75           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      76           0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
      77             :                                    &amount_with_fee),
      78             :       GNUNET_PQ_result_spec_end
      79             :     };
      80             : 
      81           0 :     if (GNUNET_OK !=
      82           0 :         GNUNET_PQ_extract_result (result,
      83             :                                   rs,
      84             :                                   i))
      85             :     {
      86           0 :       GNUNET_break (0);
      87           0 :       srctx->status = GNUNET_SYSERR;
      88           0 :       return;
      89             :     }
      90           0 :     if (GNUNET_OK !=
      91           0 :         srctx->cb (srctx->cb_cls,
      92             :                    &amount_with_fee))
      93           0 :       return;
      94             :   }
      95             : }
      96             : 
      97             : 
      98             : enum GNUNET_DB_QueryStatus
      99          17 : TEH_PG_select_refunds_by_coin (
     100             :   void *cls,
     101             :   const struct TALER_CoinSpendPublicKeyP *coin_pub,
     102             :   const struct TALER_MerchantPublicKeyP *merchant_pub,
     103             :   const struct TALER_PrivateContractHashP *h_contract,
     104             :   TALER_EXCHANGEDB_RefundCoinCallback cb,
     105             :   void *cb_cls)
     106             : {
     107          17 :   struct PostgresClosure *pg = cls;
     108             :   enum GNUNET_DB_QueryStatus qs;
     109          17 :   struct GNUNET_PQ_QueryParam params[] = {
     110          17 :     GNUNET_PQ_query_param_auto_from_type (coin_pub),
     111          17 :     GNUNET_PQ_query_param_auto_from_type (merchant_pub),
     112          17 :     GNUNET_PQ_query_param_auto_from_type (h_contract),
     113             :     GNUNET_PQ_query_param_end
     114             :   };
     115          17 :   struct SelectRefundContext srctx = {
     116             :     .cb = cb,
     117             :     .cb_cls = cb_cls,
     118             :     .pg = pg,
     119             :     .status = GNUNET_OK
     120             :   };
     121          17 :   const char *query = "get_refunds_by_coin_and_contract";
     122             : 
     123          17 :   PREPARE (pg,
     124             :            query,
     125             :            "SELECT"
     126             :            "   ref.amount_with_fee"
     127             :            " FROM refunds ref"
     128             :            " JOIN coin_deposits cdep"
     129             :            "   USING (coin_pub,batch_deposit_serial_id)"
     130             :            " JOIN batch_deposits bdep"
     131             :            "   ON (ref.batch_deposit_serial_id = bdep.batch_deposit_serial_id)"
     132             :            " WHERE ref.coin_pub=$1"
     133             :            "   AND bdep.merchant_pub=$2"
     134             :            "   AND bdep.h_contract_terms=$3;");
     135          17 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     136             :                                              query,
     137             :                                              params,
     138             :                                              &get_refunds_cb,
     139             :                                              &srctx);
     140          17 :   if (GNUNET_SYSERR == srctx.status)
     141           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     142          17 :   return qs;
     143             : }