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             : }