Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2023, 2024 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 exchangedb/select_aggregations_above_serial.c
      18              :  * @brief Implementation of the select_aggregations_above_serial function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/select_aggregations_above_serial.h"
      23              : #include "helper.h"
      24              : 
      25              : /**
      26              :  * Closure for #aggregation_serial_helper_cb().
      27              :  */
      28              : struct AggregationSerialContext
      29              : {
      30              : 
      31              :   /**
      32              :    * Callback to call.
      33              :    */
      34              :   TALER_EXCHANGEDB_AggregationCallback cb;
      35              : 
      36              :   /**
      37              :    * Closure for @e cb.
      38              :    */
      39              :   void *cb_cls;
      40              : 
      41              :   /**
      42              :    * Plugin context.
      43              :    */
      44              :   struct TALER_EXCHANGEDB_PostgresContext *pg;
      45              : 
      46              :   /**
      47              :    * Status code, set to #GNUNET_SYSERR on hard errors.
      48              :    */
      49              :   enum GNUNET_GenericReturnValue status;
      50              : };
      51              : 
      52              : 
      53              : /**
      54              :  * Helper function to be called with the results of a SELECT statement
      55              :  * that has returned @a num_results results.
      56              :  *
      57              :  * @param cls closure of type `struct AggregationSerialContext`
      58              :  * @param result the postgres result
      59              :  * @param num_results the number of results in @a result
      60              :  */
      61              : static void
      62            0 : aggregation_serial_helper_cb (void *cls,
      63              :                               PGresult *result,
      64              :                               unsigned int num_results)
      65              : {
      66            0 :   struct AggregationSerialContext *dsc = cls;
      67            0 :   struct TALER_EXCHANGEDB_PostgresContext *pg = dsc->pg;
      68              : 
      69            0 :   for (unsigned int i = 0; i<num_results; i++)
      70              :   {
      71              :     uint64_t tracking_rowid;
      72              :     uint64_t batch_deposit_serial_id;
      73              :     struct TALER_Amount amount;
      74            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      75            0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("total_amount",
      76              :                                    &amount),
      77            0 :       GNUNET_PQ_result_spec_uint64 ("aggregation_serial_id",
      78              :                                     &tracking_rowid),
      79            0 :       GNUNET_PQ_result_spec_uint64 ("batch_deposit_serial_id",
      80              :                                     &batch_deposit_serial_id),
      81              :       GNUNET_PQ_result_spec_end
      82              :     };
      83              : 
      84            0 :     if (GNUNET_OK !=
      85            0 :         GNUNET_PQ_extract_result (result,
      86              :                                   rs,
      87              :                                   i))
      88              :     {
      89            0 :       GNUNET_break (0);
      90            0 :       dsc->status = GNUNET_SYSERR;
      91            0 :       return;
      92              :     }
      93            0 :     dsc->cb (dsc->cb_cls,
      94              :              &amount,
      95              :              tracking_rowid,
      96              :              batch_deposit_serial_id);
      97            0 :     GNUNET_PQ_cleanup_result (rs);
      98              :   }
      99              : }
     100              : 
     101              : 
     102              : enum GNUNET_DB_QueryStatus
     103            0 : TALER_EXCHANGEDB_select_aggregations_above_serial (
     104              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
     105              :   uint64_t min_tracking_serial_id,
     106              :   TALER_EXCHANGEDB_AggregationCallback cb,
     107              :   void *cb_cls)
     108              : {
     109            0 :   struct GNUNET_PQ_QueryParam params[] = {
     110            0 :     GNUNET_PQ_query_param_uint64 (&min_tracking_serial_id),
     111              :     GNUNET_PQ_query_param_end
     112              :   };
     113            0 :   struct AggregationSerialContext asc = {
     114              :     .cb = cb,
     115              :     .cb_cls = cb_cls,
     116              :     .pg = pg,
     117              :     .status = GNUNET_OK
     118              :   };
     119              :   enum GNUNET_DB_QueryStatus qs;
     120              : 
     121              :   /* Fetch aggregations with rowid '\geq' the given parameter */
     122            0 :   PREPARE (pg,
     123              :            "select_aggregations_above_serial",
     124              :            "SELECT"
     125              :            " aggregation_serial_id"
     126              :            ",batch_deposit_serial_id"
     127              :            ",total_amount"
     128              :            " FROM exchange_do_select_aggregations_above_serial($1);");
     129            0 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     130              :                                              "select_aggregations_above_serial",
     131              :                                              params,
     132              :                                              &aggregation_serial_helper_cb,
     133              :                                              &asc);
     134            0 :   if (GNUNET_OK != asc.status)
     135            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     136            0 :   return qs;
     137              : }