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_select_historic_reserve_revenue.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_select_historic_reserve_revenue.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Closure for #historic_reserve_revenue_cb().
      31             :  */
      32             : struct HistoricReserveRevenueContext
      33             : {
      34             :   /**
      35             :    * Function to call for each result.
      36             :    */
      37             :   TALER_AUDITORDB_HistoricReserveRevenueDataCallback cb;
      38             : 
      39             :   /**
      40             :    * Closure for @e cb.
      41             :    */
      42             :   void *cb_cls;
      43             : 
      44             :   /**
      45             :    * Plugin context.
      46             :    */
      47             :   struct PostgresClosure *pg;
      48             : 
      49             :   /**
      50             :    * Number of results processed.
      51             :    */
      52             :   enum GNUNET_DB_QueryStatus qs;
      53             : };
      54             : 
      55             : 
      56             : /**
      57             :  * Helper function for #TAH_PG_select_historic_reserve_revenue().
      58             :  * To be called with the results of a SELECT statement
      59             :  * that has returned @a num_results results.
      60             :  *
      61             :  * @param cls closure of type `struct HistoricRevenueContext *`
      62             :  * @param result the postgres result
      63             :  * @param num_results the number of results in @a result
      64             :  */
      65             : static void
      66           1 : historic_reserve_revenue_cb (void *cls,
      67             :                              PGresult *result,
      68             :                              unsigned int num_results)
      69             : {
      70           1 :   struct HistoricReserveRevenueContext *hrc = cls;
      71           1 :   struct PostgresClosure *pg = hrc->pg;
      72             : 
      73           3 :   for (unsigned int i = 0; i < num_results; i++)
      74             :   {
      75             :     uint64_t rowid;
      76             :     struct GNUNET_TIME_Timestamp start_date;
      77             :     struct GNUNET_TIME_Timestamp end_date;
      78             :     struct TALER_Amount reserve_profits;
      79           2 :     struct GNUNET_PQ_ResultSpec rs[] = {
      80           2 :       GNUNET_PQ_result_spec_uint64 ("row_id",
      81             :                                     &rowid),
      82           2 :       GNUNET_PQ_result_spec_timestamp ("start_date",
      83             :                                        &start_date),
      84           2 :       GNUNET_PQ_result_spec_timestamp ("end_date",
      85             :                                        &end_date),
      86           2 :       TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_profits",
      87             :                                    &reserve_profits),
      88             :       GNUNET_PQ_result_spec_end
      89             :     };
      90             : 
      91           2 :     if (GNUNET_OK !=
      92           2 :         GNUNET_PQ_extract_result (result,
      93             :                                   rs,
      94             :                                   i))
      95             :     {
      96           0 :       GNUNET_break (0);
      97           0 :       hrc->qs = GNUNET_DB_STATUS_HARD_ERROR;
      98           0 :       return;
      99             :     }
     100           2 :     hrc->qs = i + 1;
     101           2 :     if (GNUNET_OK !=
     102           2 :         hrc->cb (hrc->cb_cls,
     103             :                  rowid,
     104             :                  start_date,
     105             :                  end_date,
     106             :                  &reserve_profits))
     107           0 :       break;
     108             :   }
     109             : }
     110             : 
     111             : 
     112             : enum GNUNET_DB_QueryStatus
     113           1 : TAH_PG_select_historic_reserve_revenue (
     114             :   void *cls,
     115             :   int64_t limit,
     116             :   uint64_t offset,
     117             :   TALER_AUDITORDB_HistoricReserveRevenueDataCallback cb,
     118             :   void *cb_cls)
     119             : {
     120           1 :   struct PostgresClosure *pg = cls;
     121           1 :   uint64_t ulimit = (limit > 0) ? limit : -limit;
     122           1 :   struct GNUNET_PQ_QueryParam params[] = {
     123           1 :     GNUNET_PQ_query_param_uint64 (&offset),
     124           1 :     GNUNET_PQ_query_param_uint64 (&ulimit),
     125             :     GNUNET_PQ_query_param_end
     126             :   };
     127             :   enum GNUNET_DB_QueryStatus qs;
     128           1 :   struct HistoricReserveRevenueContext hrc = {
     129             :     .cb = cb,
     130             :     .cb_cls = cb_cls,
     131             :     .pg = pg
     132             :   };
     133             : 
     134           1 :   PREPARE (pg,
     135             :            "auditor_historic_reserve_summary_select_inc",
     136             :            "SELECT"
     137             :            " row_id"
     138             :            ",start_date"
     139             :            ",end_date"
     140             :            ",reserve_profits"
     141             :            " FROM auditor_historic_reserve_summary"
     142             :            " WHERE row_id > $1"
     143             :            " ORDER BY row_id ASC"
     144             :            " LIMIT $2");
     145           1 :   PREPARE (pg,
     146             :            "auditor_historic_reserve_summary_select_dec",
     147             :            "SELECT"
     148             :            " row_id"
     149             :            ",start_date"
     150             :            ",end_date"
     151             :            ",reserve_profits"
     152             :            " FROM auditor_historic_reserve_summary"
     153             :            " WHERE row_id < $1"
     154             :            " ORDER BY row_id DESC"
     155             :            " LIMIT $2");
     156           1 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     157             :     pg->conn,
     158             :     limit > 0
     159             :     ? "auditor_historic_reserve_summary_select_inc"
     160             :     : "auditor_historic_reserve_summary_select_dec",
     161             :     params,
     162             :     &historic_reserve_revenue_cb,
     163             :     &hrc);
     164           1 :   if (0 >= qs)
     165           0 :     return qs;
     166           1 :   return hrc.qs;
     167             : }