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 exchangedb/pg_iterate_auditor_denominations.c
      18              :  * @brief Implementation of the iterate_auditor_denominations 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_iterate_auditor_denominations.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : /**
      29              :  * Closure for #auditor_denoms_cb_helper()
      30              :  */
      31              : struct AuditorDenomsIteratorContext
      32              : {
      33              :   /**
      34              :    * Function to call with the results.
      35              :    */
      36              :   TALER_EXCHANGEDB_AuditorDenominationsCallback cb;
      37              : 
      38              :   /**
      39              :    * Closure to pass to @e cb
      40              :    */
      41              :   void *cb_cls;
      42              : };
      43              : 
      44              : 
      45              : /**
      46              :  * Helper function for #TEH_PG_iterate_auditor_denominations().
      47              :  * Calls the callback with each auditor and denomination pair.
      48              :  *
      49              :  * @param cls a `struct AuditorDenomsIteratorContext`
      50              :  * @param result db results
      51              :  * @param num_results number of results in @a result
      52              :  */
      53              : static void
      54           51 : auditor_denoms_cb_helper (void *cls,
      55              :                           PGresult *result,
      56              :                           unsigned int num_results)
      57              : {
      58           51 :   struct AuditorDenomsIteratorContext *dic = cls;
      59              : 
      60           51 :   for (unsigned int i = 0; i<num_results; i++)
      61              :   {
      62              :     struct TALER_AuditorPublicKeyP auditor_pub;
      63              :     struct TALER_DenominationHashP h_denom_pub;
      64              :     struct TALER_AuditorSignatureP auditor_sig;
      65            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      66            0 :       GNUNET_PQ_result_spec_auto_from_type ("auditor_pub",
      67              :                                             &auditor_pub),
      68            0 :       GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
      69              :                                             &h_denom_pub),
      70            0 :       GNUNET_PQ_result_spec_auto_from_type ("auditor_sig",
      71              :                                             &auditor_sig),
      72              :       GNUNET_PQ_result_spec_end
      73              :     };
      74              : 
      75            0 :     if (GNUNET_OK !=
      76            0 :         GNUNET_PQ_extract_result (result,
      77              :                                   rs,
      78              :                                   i))
      79              :     {
      80            0 :       GNUNET_break (0);
      81            0 :       return;
      82              :     }
      83            0 :     dic->cb (dic->cb_cls,
      84              :              &auditor_pub,
      85              :              &h_denom_pub,
      86              :              &auditor_sig);
      87              :   }
      88              : }
      89              : 
      90              : 
      91              : enum GNUNET_DB_QueryStatus
      92           51 : TEH_PG_iterate_auditor_denominations (
      93              :   void *cls,
      94              :   TALER_EXCHANGEDB_AuditorDenominationsCallback cb,
      95              :   void *cb_cls)
      96              : {
      97           51 :   struct PostgresClosure *pg = cls;
      98           51 :   struct GNUNET_PQ_QueryParam params[] = {
      99              :     GNUNET_PQ_query_param_end
     100              :   };
     101           51 :   struct AuditorDenomsIteratorContext dic = {
     102              :     .cb = cb,
     103              :     .cb_cls = cb_cls,
     104              :   };
     105              :   /* Used in #postgres_iterate_auditor_denominations() */
     106           51 :   PREPARE (pg,
     107              :            "select_auditor_denoms",
     108              :            "SELECT"
     109              :            " auditors.auditor_pub"
     110              :            ",denominations.denom_pub_hash"
     111              :            ",auditor_denom_sigs.auditor_sig"
     112              :            " FROM auditor_denom_sigs"
     113              :            " JOIN auditors USING (auditor_uuid)"
     114              :            " JOIN denominations USING (denominations_serial)"
     115              :            " WHERE auditors.is_active;");
     116           51 :   return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     117              :                                                "select_auditor_denoms",
     118              :                                                params,
     119              :                                                &auditor_denoms_cb_helper,
     120              :                                                &dic);
     121              : }