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 "platform.h"
      22             : #include "taler_error_codes.h"
      23             : #include "taler_dbevents.h"
      24             : #include "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          74 : purse_expired_cb (void *cls,
      68             :                   PGresult *result,
      69             :                   unsigned int num_results)
      70             : {
      71          74 :   struct PurseExpiredContext *eic = cls;
      72          74 :   struct PostgresClosure *pg = eic->pg;
      73             : 
      74          74 :   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          74 : TAH_PG_select_purse_expired (
     111             :   void *cls,
     112             :   TALER_AUDITORDB_ExpiredPurseCallback cb,
     113             :   void *cb_cls)
     114             : {
     115          74 :   struct PostgresClosure *pg = cls;
     116             :   struct GNUNET_TIME_Timestamp now
     117          74 :     = GNUNET_TIME_timestamp_get ();
     118          74 :   struct GNUNET_PQ_QueryParam params[] = {
     119          74 :     GNUNET_PQ_query_param_timestamp (&now),
     120             :     GNUNET_PQ_query_param_end
     121             :   };
     122          74 :   struct PurseExpiredContext eic = {
     123             :     .cb = cb,
     124             :     .cb_cls = cb_cls,
     125             :     .pg = pg
     126             :   };
     127             :   enum GNUNET_DB_QueryStatus qs;
     128             : 
     129          74 :   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          74 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     138             :                                              "auditor_select_expired_purses",
     139             :                                              params,
     140             :                                              &purse_expired_cb,
     141             :                                              &eic);
     142          74 :   if (qs > 0)
     143           0 :     return eic.qs;
     144          74 :   GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
     145          74 :   return qs;
     146             : }