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 pg_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/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_iterate_reserve_close_info.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : /**
      29              :  * Closure for #iterate_reserve_close_info_cb()
      30              :  */
      31              : struct IteratorContext
      32              : {
      33              :   /**
      34              :    * Function to call with the results.
      35              :    */
      36              :   TALER_EXCHANGEDB_KycAmountCallback cb;
      37              : 
      38              :   /**
      39              :    * Closure to pass to @e cb
      40              :    */
      41              :   void *cb_cls;
      42              : 
      43              :   /**
      44              :    * Plugin context.
      45              :    */
      46              :   struct PostgresClosure *pg;
      47              : };
      48              : 
      49              : 
      50              : /**
      51              :  * Helper function for #TEH_PG_iterate_reserve_close_info().
      52              :  * Calls the callback with each denomination key.
      53              :  *
      54              :  * @param cls a `struct IteratorContext`
      55              :  * @param result db results
      56              :  * @param num_results number of results in @a result
      57              :  */
      58              : static void
      59            4 : iterate_reserve_close_info_cb (void *cls,
      60              :                                PGresult *result,
      61              :                                unsigned int num_results)
      62              : {
      63            4 :   struct IteratorContext *ic = cls;
      64            4 :   struct PostgresClosure *pg = ic->pg;
      65              : 
      66            4 :   for (unsigned int i = 0; i<num_results; i++)
      67              :   {
      68              :     struct TALER_Amount amount;
      69              :     struct GNUNET_TIME_Absolute ts;
      70            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      71            0 :       GNUNET_PQ_result_spec_absolute_time ("execution_date",
      72              :                                            &ts),
      73            0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
      74              :                                    &amount),
      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 :       return;
      85              :     }
      86            0 :     ic->cb (ic->cb_cls,
      87              :             &amount,
      88              :             ts);
      89              :   }
      90              : }
      91              : 
      92              : 
      93              : enum GNUNET_DB_QueryStatus
      94            4 : TEH_PG_iterate_reserve_close_info (
      95              :   void *cls,
      96              :   const struct TALER_NormalizedPaytoHashP *h_payto,
      97              :   struct GNUNET_TIME_Absolute time_limit,
      98              :   TALER_EXCHANGEDB_KycAmountCallback kac,
      99              :   void *kac_cls)
     100              : {
     101            4 :   struct PostgresClosure *pg = cls;
     102            4 :   struct GNUNET_PQ_QueryParam params[] = {
     103            4 :     GNUNET_PQ_query_param_auto_from_type (h_payto),
     104            4 :     GNUNET_PQ_query_param_absolute_time (&time_limit),
     105              :     GNUNET_PQ_query_param_end
     106              :   };
     107            4 :   struct IteratorContext ic = {
     108              :     .cb = kac,
     109              :     .cb_cls = kac_cls,
     110              :     .pg = pg
     111              :   };
     112              : 
     113            4 :   PREPARE (pg,
     114              :            "iterate_reserve_close_info",
     115              :            "SELECT amount"
     116              :            "      ,execution_date"
     117              :            "  FROM reserves_close"
     118              :            " WHERE wire_target_h_payto IN ("
     119              :            "   SELECT wire_target_h_payto"
     120              :            "     FROM wire_targets"
     121              :            "    WHERE h_normalized_payto=$1"
     122              :            "   )"
     123              :            "   AND execution_date >= $2"
     124              :            " ORDER BY execution_date DESC");
     125            4 :   return GNUNET_PQ_eval_prepared_multi_select (
     126              :     pg->conn,
     127              :     "iterate_reserve_close_info",
     128              :     params,
     129              :     &iterate_reserve_close_info_cb,
     130              :     &ic);
     131              : }