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 src/auditordb/select_purse_expired.c
      18              :  * @brief Implementation of the select_purse_expired function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "auditor-database/select_purse_expired.h"
      23              : #include "pg_helper.h"
      24              : 
      25              : 
      26              : /**
      27              :  * Closure for #purse_expired_cb().
      28              :  */
      29              : struct PurseExpiredContext
      30              : {
      31              : 
      32              :   /**
      33              :    * Function to call for each expired purse.
      34              :    */
      35              :   TALER_AUDITORDB_ExpiredPurseCallback cb;
      36              : 
      37              :   /**
      38              :    * Closure for @e cb
      39              :    */
      40              :   void *cb_cls;
      41              : 
      42              :   /**
      43              :    * Plugin context.
      44              :    */
      45              :   struct TALER_AUDITORDB_PostgresContext *pg;
      46              : 
      47              :   /**
      48              :    * Query status to return.
      49              :    */
      50              :   enum GNUNET_DB_QueryStatus qs;
      51              : };
      52              : 
      53              : 
      54              : /**
      55              :  * Helper function for #TALER_AUDITORDB_select_purse_expired().
      56              :  * To be called with the results of a SELECT statement
      57              :  * that has returned @a num_results results.
      58              :  *
      59              :  * @param cls closure of type `struct PurseExpiredContext *`
      60              :  * @param result the postgres result
      61              :  * @param num_results the number of results in @a result
      62              :  */
      63              : static void
      64            4 : purse_expired_cb (void *cls,
      65              :                   PGresult *result,
      66              :                   unsigned int num_results)
      67              : {
      68            4 :   struct PurseExpiredContext *eic = cls;
      69            4 :   struct TALER_AUDITORDB_PostgresContext *pg = eic->pg;
      70              : 
      71            4 :   for (unsigned int i = 0; i < num_results; i++)
      72              :   {
      73              :     struct TALER_PurseContractPublicKeyP purse_pub;
      74              :     struct GNUNET_TIME_Timestamp expiration_date;
      75              :     struct TALER_Amount balance;
      76            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      77            0 :       GNUNET_PQ_result_spec_auto_from_type ("purse_pub",
      78              :                                             &purse_pub),
      79            0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("balance",
      80              :                                    &balance),
      81            0 :       GNUNET_PQ_result_spec_timestamp ("expiration_date",
      82              :                                        &expiration_date),
      83              :       GNUNET_PQ_result_spec_end
      84              :     };
      85              : 
      86            0 :     if (GNUNET_OK !=
      87            0 :         GNUNET_PQ_extract_result (result,
      88              :                                   rs,
      89              :                                   i))
      90              :     {
      91            0 :       GNUNET_break (0);
      92            0 :       eic->qs = GNUNET_DB_STATUS_HARD_ERROR;
      93            0 :       return;
      94              :     }
      95            0 :     eic->qs = i + 1;
      96            0 :     if (GNUNET_OK !=
      97            0 :         eic->cb (eic->cb_cls,
      98              :                  &purse_pub,
      99              :                  &balance,
     100              :                  expiration_date))
     101            0 :       break;
     102              :   }
     103              : }
     104              : 
     105              : 
     106              : enum GNUNET_DB_QueryStatus
     107            4 : TALER_AUDITORDB_select_purse_expired (struct TALER_AUDITORDB_PostgresContext *pg
     108              :                                       ,
     109              :                                       TALER_AUDITORDB_ExpiredPurseCallback cb,
     110              :                                       void *cb_cls)
     111              : {
     112              :   struct GNUNET_TIME_Timestamp now
     113            4 :     = GNUNET_TIME_timestamp_get ();
     114            4 :   struct GNUNET_PQ_QueryParam params[] = {
     115            4 :     GNUNET_PQ_query_param_timestamp (&now),
     116              :     GNUNET_PQ_query_param_end
     117              :   };
     118            4 :   struct PurseExpiredContext eic = {
     119              :     .cb = cb,
     120              :     .cb_cls = cb_cls,
     121              :     .pg = pg
     122              :   };
     123              :   enum GNUNET_DB_QueryStatus qs;
     124              : 
     125            4 :   PREPARE (pg,
     126              :            "auditor_select_expired_purses",
     127              :            "SELECT"
     128              :            " purse_pub"
     129              :            ",expiration_date"
     130              :            ",balance"
     131              :            " FROM auditor_purses"
     132              :            " WHERE expiration_date<$1;");
     133            4 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     134              :                                              "auditor_select_expired_purses",
     135              :                                              params,
     136              :                                              &purse_expired_cb,
     137              :                                              &eic);
     138            4 :   if (qs > 0)
     139            0 :     return eic.qs;
     140            4 :   GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
     141            4 :   return qs;
     142              : }