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/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/taler_pq_lib.h"
      22              : #include "exchange-database/select_refunds_by_coin.h"
      23              : #include "helper.h"
      24              : 
      25              : 
      26              : /**
      27              :  * Closure for #get_refunds_cb().
      28              :  */
      29              : struct SelectRefundContext
      30              : {
      31              :   /**
      32              :    * Function to call on each result.
      33              :    */
      34              :   TALER_EXCHANGEDB_RefundCoinCallback cb;
      35              : 
      36              :   /**
      37              :    * Closure for @a cb.
      38              :    */
      39              :   void *cb_cls;
      40              : 
      41              :   /**
      42              :    * Plugin context.
      43              :    */
      44              :   struct TALER_EXCHANGEDB_PostgresContext *pg;
      45              : 
      46              :   /**
      47              :    * Set to #GNUNET_SYSERR on error.
      48              :    */
      49              :   enum GNUNET_GenericReturnValue status;
      50              : };
      51              : 
      52              : 
      53              : /**
      54              :  * Function to be called with the results of a SELECT statement
      55              :  * that has returned @a num_results results.
      56              :  *
      57              :  * @param cls closure of type `struct SelectRefundContext *`
      58              :  * @param result the postgres result
      59              :  * @param num_results the number of results in @a result
      60              :  */
      61              : static void
      62           17 : get_refunds_cb (void *cls,
      63              :                 PGresult *result,
      64              :                 unsigned int num_results)
      65              : {
      66           17 :   struct SelectRefundContext *srctx = cls;
      67           17 :   struct TALER_EXCHANGEDB_PostgresContext *pg = srctx->pg;
      68              : 
      69           17 :   for (unsigned int i = 0; i<num_results; i++)
      70              :   {
      71              :     struct TALER_Amount amount_with_fee;
      72            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      73            0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
      74              :                                    &amount_with_fee),
      75              :       GNUNET_PQ_result_spec_end
      76              :     };
      77              : 
      78            0 :     if (GNUNET_OK !=
      79            0 :         GNUNET_PQ_extract_result (result,
      80              :                                   rs,
      81              :                                   i))
      82              :     {
      83            0 :       GNUNET_break (0);
      84            0 :       srctx->status = GNUNET_SYSERR;
      85            0 :       return;
      86              :     }
      87            0 :     if (GNUNET_OK !=
      88            0 :         srctx->cb (srctx->cb_cls,
      89              :                    &amount_with_fee))
      90            0 :       return;
      91              :   }
      92              : }
      93              : 
      94              : 
      95              : enum GNUNET_DB_QueryStatus
      96           17 : TALER_EXCHANGEDB_select_refunds_by_coin (
      97              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
      98              :   const struct TALER_CoinSpendPublicKeyP *coin_pub,
      99              :   const struct TALER_MerchantPublicKeyP *merchant_pub,
     100              :   const struct TALER_PrivateContractHashP *h_contract,
     101              :   TALER_EXCHANGEDB_RefundCoinCallback cb,
     102              :   void *cb_cls)
     103              : {
     104              :   enum GNUNET_DB_QueryStatus qs;
     105           17 :   struct GNUNET_PQ_QueryParam params[] = {
     106           17 :     GNUNET_PQ_query_param_auto_from_type (coin_pub),
     107           17 :     GNUNET_PQ_query_param_auto_from_type (merchant_pub),
     108           17 :     GNUNET_PQ_query_param_auto_from_type (h_contract),
     109              :     GNUNET_PQ_query_param_end
     110              :   };
     111           17 :   struct SelectRefundContext srctx = {
     112              :     .cb = cb,
     113              :     .cb_cls = cb_cls,
     114              :     .pg = pg,
     115              :     .status = GNUNET_OK
     116              :   };
     117           17 :   const char *query = "get_refunds_by_coin_and_contract";
     118              : 
     119           17 :   PREPARE (pg,
     120              :            query,
     121              :            "SELECT"
     122              :            "   ref.amount_with_fee"
     123              :            " FROM refunds ref"
     124              :            " JOIN coin_deposits cdep"
     125              :            "   USING (coin_pub,batch_deposit_serial_id)"
     126              :            " JOIN batch_deposits bdep"
     127              :            "   ON (ref.batch_deposit_serial_id = bdep.batch_deposit_serial_id)"
     128              :            " WHERE ref.coin_pub=$1"
     129              :            "   AND bdep.merchant_pub=$2"
     130              :            "   AND bdep.h_contract_terms=$3;");
     131           17 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     132              :                                              query,
     133              :                                              params,
     134              :                                              &get_refunds_cb,
     135              :                                              &srctx);
     136           17 :   if (GNUNET_SYSERR == srctx.status)
     137            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     138           17 :   return qs;
     139              : }