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              : }