Line data    Source code

       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 iterate_reserve_close_info.c
      18              :  * @brief Low-level (statement-level) Postgres database access for the exchange
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/iterate_reserve_close_info.h"
      23              : #include "helper.h"
      24              : 
      25              : /**
      26              :  * Closure for #iterate_reserve_close_info_cb()
      27              :  */
      28              : struct IteratorContext
      29              : {
      30              :   /**
      31              :    * Function to call with the results.
      32              :    */
      33              :   TALER_KYCLOGIC_KycAmountCallback cb;
      34              : 
      35              :   /**
      36              :    * Closure to pass to @e cb
      37              :    */
      38              :   void *cb_cls;
      39              : 
      40              :   /**
      41              :    * Plugin context.
      42              :    */
      43              :   struct TALER_EXCHANGEDB_PostgresContext *pg;
      44              : };
      45              : 
      46              : 
      47              : /**
      48              :  * Helper function for #TALER_EXCHANGEDB_iterate_reserve_close_info().
      49              :  * Calls the callback with each denomination key.
      50              :  *
      51              :  * @param cls a `struct IteratorContext`
      52              :  * @param result db results
      53              :  * @param num_results number of results in @a result
      54              :  */
      55              : static void
      56            4 : iterate_reserve_close_info_cb (void *cls,
      57              :                                PGresult *result,
      58              :                                unsigned int num_results)
      59              : {
      60            4 :   struct IteratorContext *ic = cls;
      61            4 :   struct TALER_EXCHANGEDB_PostgresContext *pg = ic->pg;
      62              : 
      63            4 :   for (unsigned int i = 0; i<num_results; i++)
      64              :   {
      65              :     struct TALER_Amount amount;
      66              :     struct GNUNET_TIME_Absolute ts;
      67            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      68            0 :       GNUNET_PQ_result_spec_absolute_time ("execution_date",
      69              :                                            &ts),
      70            0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
      71              :                                    &amount),
      72              :       GNUNET_PQ_result_spec_end
      73              :     };
      74              : 
      75            0 :     if (GNUNET_OK !=
      76            0 :         GNUNET_PQ_extract_result (result,
      77              :                                   rs,
      78              :                                   i))
      79              :     {
      80            0 :       GNUNET_break (0);
      81            0 :       return;
      82              :     }
      83            0 :     ic->cb (ic->cb_cls,
      84              :             &amount,
      85              :             ts);
      86              :   }
      87              : }
      88              : 
      89              : 
      90              : enum GNUNET_DB_QueryStatus
      91            4 : TALER_EXCHANGEDB_iterate_reserve_close_info (
      92              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
      93              :   const struct TALER_NormalizedPaytoHashP *h_payto,
      94              :   struct GNUNET_TIME_Absolute time_limit,
      95              :   TALER_KYCLOGIC_KycAmountCallback kac,
      96              :   void *kac_cls)
      97              : {
      98            4 :   struct GNUNET_PQ_QueryParam params[] = {
      99            4 :     GNUNET_PQ_query_param_auto_from_type (h_payto),
     100            4 :     GNUNET_PQ_query_param_absolute_time (&time_limit),
     101              :     GNUNET_PQ_query_param_end
     102              :   };
     103            4 :   struct IteratorContext ic = {
     104              :     .cb = kac,
     105              :     .cb_cls = kac_cls,
     106              :     .pg = pg
     107              :   };
     108              : 
     109            4 :   PREPARE (pg,
     110              :            "iterate_reserve_close_info",
     111              :            "SELECT amount"
     112              :            "      ,execution_date"
     113              :            "  FROM reserves_close"
     114              :            " WHERE wire_target_h_payto IN ("
     115              :            "   SELECT wire_target_h_payto"
     116              :            "     FROM wire_targets"
     117              :            "    WHERE h_normalized_payto=$1"
     118              :            "   )"
     119              :            "   AND execution_date >= $2"
     120              :            " ORDER BY execution_date DESC");
     121            4 :   return GNUNET_PQ_eval_prepared_multi_select (
     122              :     pg->conn,
     123              :     "iterate_reserve_close_info",
     124              :     params,
     125              :     &iterate_reserve_close_info_cb,
     126              :     &ic);
     127              : }