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Base system with REST service to issue digital coins, run by the payment service provider
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pg_select_historic_reserve_revenue.c (4721B)

      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 historic_reserve_revenue_cb (void *cls,
     67                              PGresult *result,
     68                              unsigned int num_results)
     69 {
     70   struct HistoricReserveRevenueContext *hrc = cls;
     71   struct PostgresClosure *pg = hrc->pg;
     72 
     73   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     struct GNUNET_PQ_ResultSpec rs[] = {
     80       GNUNET_PQ_result_spec_uint64 ("row_id",
     81                                     &rowid),
     82       GNUNET_PQ_result_spec_timestamp ("start_date",
     83                                        &start_date),
     84       GNUNET_PQ_result_spec_timestamp ("end_date",
     85                                        &end_date),
     86       TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_profits",
     87                                    &reserve_profits),
     88       GNUNET_PQ_result_spec_end
     89     };
     90 
     91     if (GNUNET_OK !=
     92         GNUNET_PQ_extract_result (result,
     93                                   rs,
     94                                   i))
     95     {
     96       GNUNET_break (0);
     97       hrc->qs = GNUNET_DB_STATUS_HARD_ERROR;
     98       return;
     99     }
    100     hrc->qs = i + 1;
    101     if (GNUNET_OK !=
    102         hrc->cb (hrc->cb_cls,
    103                  rowid,
    104                  start_date,
    105                  end_date,
    106                  &reserve_profits))
    107       break;
    108   }
    109 }
    110 
    111 
    112 enum GNUNET_DB_QueryStatus
    113 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   struct PostgresClosure *pg = cls;
    121   uint64_t ulimit = (limit > 0) ? limit : -limit;
    122   struct GNUNET_PQ_QueryParam params[] = {
    123     GNUNET_PQ_query_param_uint64 (&offset),
    124     GNUNET_PQ_query_param_uint64 (&ulimit),
    125     GNUNET_PQ_query_param_end
    126   };
    127   enum GNUNET_DB_QueryStatus qs;
    128   struct HistoricReserveRevenueContext hrc = {
    129     .cb = cb,
    130     .cb_cls = cb_cls,
    131     .pg = pg
    132   };
    133 
    134   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   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   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   if (0 >= qs)
    165     return qs;
    166   return hrc.qs;
    167 }