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 "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_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            0 : aggregation_serial_helper_cb (void *cls,
      66              :                               PGresult *result,
      67              :                               unsigned int num_results)
      68              : {
      69            0 :   struct AggregationSerialContext *dsc = cls;
      70            0 :   struct PostgresClosure *pg = dsc->pg;
      71              : 
      72            0 :   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            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      78            0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("total_amount",
      79              :                                    &amount),
      80            0 :       GNUNET_PQ_result_spec_uint64 ("aggregation_serial_id",
      81              :                                     &tracking_rowid),
      82            0 :       GNUNET_PQ_result_spec_uint64 ("batch_deposit_serial_id",
      83              :                                     &batch_deposit_serial_id),
      84              :       GNUNET_PQ_result_spec_end
      85              :     };
      86              : 
      87            0 :     if (GNUNET_OK !=
      88            0 :         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            0 :     dsc->cb (dsc->cb_cls,
      97              :              &amount,
      98              :              tracking_rowid,
      99              :              batch_deposit_serial_id);
     100            0 :     GNUNET_PQ_cleanup_result (rs);
     101              :   }
     102              : }
     103              : 
     104              : 
     105              : enum GNUNET_DB_QueryStatus
     106            0 : 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            0 :   struct PostgresClosure *pg = cls;
     113            0 :   struct GNUNET_PQ_QueryParam params[] = {
     114            0 :     GNUNET_PQ_query_param_uint64 (&min_tracking_serial_id),
     115              :     GNUNET_PQ_query_param_end
     116              :   };
     117            0 :   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            0 :   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            0 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     134              :                                              "select_aggregations_above_serial",
     135              :                                              params,
     136              :                                              &aggregation_serial_helper_cb,
     137              :                                              &asc);
     138            0 :   if (GNUNET_OK != asc.status)
     139            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     140            0 :   return qs;
     141              : }