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/pg_select_aggregations_above_serial.c
      18             :  * @brief Implementation of the select_aggregations_above_serial function for Postgres
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "platform.h"
      22             : #include "taler_error_codes.h"
      23             : #include "taler_dbevents.h"
      24             : #include "taler_pq_lib.h"
      25             : #include "pg_select_aggregations_above_serial.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : /**
      29             :  * Closure for #aggregation_serial_helper_cb().
      30             :  */
      31             : struct AggregationSerialContext
      32             : {
      33             : 
      34             :   /**
      35             :    * Callback to call.
      36             :    */
      37             :   TALER_EXCHANGEDB_AggregationCallback 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             :    * Status code, set to #GNUNET_SYSERR on hard errors.
      51             :    */
      52             :   enum GNUNET_GenericReturnValue status;
      53             : };
      54             : 
      55             : 
      56             : /**
      57             :  * Helper function to be called with the results of a SELECT statement
      58             :  * that has returned @a num_results results.
      59             :  *
      60             :  * @param cls closure of type `struct AggregationSerialContext`
      61             :  * @param result the postgres result
      62             :  * @param num_results the number of results in @a result
      63             :  */
      64             : static void
      65          68 : aggregation_serial_helper_cb (void *cls,
      66             :                               PGresult *result,
      67             :                               unsigned int num_results)
      68             : {
      69          68 :   struct AggregationSerialContext *dsc = cls;
      70          68 :   struct PostgresClosure *pg = dsc->pg;
      71             : 
      72         110 :   for (unsigned int i = 0; i<num_results; i++)
      73             :   {
      74             :     uint64_t tracking_rowid;
      75             :     uint64_t batch_deposit_serial_id;
      76             :     struct TALER_Amount amount;
      77          42 :     struct GNUNET_PQ_ResultSpec rs[] = {
      78          42 :       TALER_PQ_RESULT_SPEC_AMOUNT ("total_amount",
      79             :                                    &amount),
      80          42 :       GNUNET_PQ_result_spec_uint64 ("aggregation_serial_id",
      81             :                                     &tracking_rowid),
      82          42 :       GNUNET_PQ_result_spec_uint64 ("batch_deposit_serial_id",
      83             :                                     &batch_deposit_serial_id),
      84             :       GNUNET_PQ_result_spec_end
      85             :     };
      86             : 
      87          42 :     if (GNUNET_OK !=
      88          42 :         GNUNET_PQ_extract_result (result,
      89             :                                   rs,
      90             :                                   i))
      91             :     {
      92           0 :       GNUNET_break (0);
      93           0 :       dsc->status = GNUNET_SYSERR;
      94           0 :       return;
      95             :     }
      96          42 :     dsc->cb (dsc->cb_cls,
      97             :              &amount,
      98             :              tracking_rowid,
      99             :              batch_deposit_serial_id);
     100          42 :     GNUNET_PQ_cleanup_result (rs);
     101             :   }
     102             : }
     103             : 
     104             : 
     105             : enum GNUNET_DB_QueryStatus
     106          68 : TEH_PG_select_aggregations_above_serial (
     107             :   void *cls,
     108             :   uint64_t min_tracking_serial_id,
     109             :   TALER_EXCHANGEDB_AggregationCallback cb,
     110             :   void *cb_cls)
     111             : {
     112          68 :   struct PostgresClosure *pg = cls;
     113          68 :   struct GNUNET_PQ_QueryParam params[] = {
     114          68 :     GNUNET_PQ_query_param_uint64 (&min_tracking_serial_id),
     115             :     GNUNET_PQ_query_param_end
     116             :   };
     117          68 :   struct AggregationSerialContext asc = {
     118             :     .cb = cb,
     119             :     .cb_cls = cb_cls,
     120             :     .pg = pg,
     121             :     .status = GNUNET_OK
     122             :   };
     123             :   enum GNUNET_DB_QueryStatus qs;
     124             : 
     125             :   /* Fetch aggregations with rowid '\geq' the given parameter */
     126          68 :   PREPARE (pg,
     127             :            "select_aggregations_above_serial",
     128             :            "SELECT"
     129             :            " aggregation_serial_id"
     130             :            ",batch_deposit_serial_id"
     131             :            ",total_amount"
     132             :            " FROM exchange_do_select_aggregations_above_serial($1);");
     133          68 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     134             :                                              "select_aggregations_above_serial",
     135             :                                              params,
     136             :                                              &aggregation_serial_helper_cb,
     137             :                                              &asc);
     138          68 :   if (GNUNET_OK != asc.status)
     139           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     140          68 :   return qs;
     141             : }