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 auditordb/pg_select_purse_expired.c
      18              :  * @brief Implementation of the select_purse_expired 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_purse_expired.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : 
      29              : /**
      30              :  * Closure for #purse_expired_cb().
      31              :  */
      32              : struct PurseExpiredContext
      33              : {
      34              : 
      35              :   /**
      36              :    * Function to call for each expired purse.
      37              :    */
      38              :   TALER_AUDITORDB_ExpiredPurseCallback cb;
      39              : 
      40              :   /**
      41              :    * Closure for @e cb
      42              :    */
      43              :   void *cb_cls;
      44              : 
      45              :   /**
      46              :    * Plugin context.
      47              :    */
      48              :   struct PostgresClosure *pg;
      49              : 
      50              :   /**
      51              :    * Query status to return.
      52              :    */
      53              :   enum GNUNET_DB_QueryStatus qs;
      54              : };
      55              : 
      56              : 
      57              : /**
      58              :  * Helper function for #TAH_PG_select_purse_expired().
      59              :  * To be called with the results of a SELECT statement
      60              :  * that has returned @a num_results results.
      61              :  *
      62              :  * @param cls closure of type `struct PurseExpiredContext *`
      63              :  * @param result the postgres result
      64              :  * @param num_results the number of results in @a result
      65              :  */
      66              : static void
      67            4 : purse_expired_cb (void *cls,
      68              :                   PGresult *result,
      69              :                   unsigned int num_results)
      70              : {
      71            4 :   struct PurseExpiredContext *eic = cls;
      72            4 :   struct PostgresClosure *pg = eic->pg;
      73              : 
      74            4 :   for (unsigned int i = 0; i < num_results; i++)
      75              :   {
      76              :     struct TALER_PurseContractPublicKeyP purse_pub;
      77              :     struct GNUNET_TIME_Timestamp expiration_date;
      78              :     struct TALER_Amount balance;
      79            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      80            0 :       GNUNET_PQ_result_spec_auto_from_type ("purse_pub",
      81              :                                             &purse_pub),
      82            0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("balance",
      83              :                                    &balance),
      84            0 :       GNUNET_PQ_result_spec_timestamp ("expiration_date",
      85              :                                        &expiration_date),
      86              :       GNUNET_PQ_result_spec_end
      87              :     };
      88              : 
      89            0 :     if (GNUNET_OK !=
      90            0 :         GNUNET_PQ_extract_result (result,
      91              :                                   rs,
      92              :                                   i))
      93              :     {
      94            0 :       GNUNET_break (0);
      95            0 :       eic->qs = GNUNET_DB_STATUS_HARD_ERROR;
      96            0 :       return;
      97              :     }
      98            0 :     eic->qs = i + 1;
      99            0 :     if (GNUNET_OK !=
     100            0 :         eic->cb (eic->cb_cls,
     101              :                  &purse_pub,
     102              :                  &balance,
     103              :                  expiration_date))
     104            0 :       break;
     105              :   }
     106              : }
     107              : 
     108              : 
     109              : enum GNUNET_DB_QueryStatus
     110            4 : TAH_PG_select_purse_expired (
     111              :   void *cls,
     112              :   TALER_AUDITORDB_ExpiredPurseCallback cb,
     113              :   void *cb_cls)
     114              : {
     115            4 :   struct PostgresClosure *pg = cls;
     116              :   struct GNUNET_TIME_Timestamp now
     117            4 :     = GNUNET_TIME_timestamp_get ();
     118            4 :   struct GNUNET_PQ_QueryParam params[] = {
     119            4 :     GNUNET_PQ_query_param_timestamp (&now),
     120              :     GNUNET_PQ_query_param_end
     121              :   };
     122            4 :   struct PurseExpiredContext eic = {
     123              :     .cb = cb,
     124              :     .cb_cls = cb_cls,
     125              :     .pg = pg
     126              :   };
     127              :   enum GNUNET_DB_QueryStatus qs;
     128              : 
     129            4 :   PREPARE (pg,
     130              :            "auditor_select_expired_purses",
     131              :            "SELECT"
     132              :            " purse_pub"
     133              :            ",expiration_date"
     134              :            ",balance"
     135              :            " FROM auditor_purses"
     136              :            " WHERE expiration_date<$1;");
     137            4 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     138              :                                              "auditor_select_expired_purses",
     139              :                                              params,
     140              :                                              &purse_expired_cb,
     141              :                                              &eic);
     142            4 :   if (qs > 0)
     143            0 :     return eic.qs;
     144            4 :   GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
     145            4 :   return qs;
     146              : }