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          89 : auditor_denoms_cb_helper (void *cls,
      55             :                           PGresult *result,
      56             :                           unsigned int num_results)
      57             : {
      58          89 :   struct AuditorDenomsIteratorContext *dic = cls;
      59             : 
      60          89 :   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          89 : TEH_PG_iterate_auditor_denominations (
      93             :   void *cls,
      94             :   TALER_EXCHANGEDB_AuditorDenominationsCallback cb,
      95             :   void *cb_cls)
      96             : {
      97          89 :   struct PostgresClosure *pg = cls;
      98          89 :   struct GNUNET_PQ_QueryParam params[] = {
      99             :     GNUNET_PQ_query_param_end
     100             :   };
     101          89 :   struct AuditorDenomsIteratorContext dic = {
     102             :     .cb = cb,
     103             :     .cb_cls = cb_cls,
     104             :   };
     105             :   /* Used in #postgres_iterate_auditor_denominations() */
     106          89 :   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          89 :   return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     117             :                                                "select_auditor_denoms",
     118             :                                                params,
     119             :                                                &auditor_denoms_cb_helper,
     120             :                                                &dic);
     121             : }