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/iterate_auditor_denominations.c
      18              :  * @brief Implementation of the iterate_auditor_denominations function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/iterate_auditor_denominations.h"
      23              : #include "helper.h"
      24              : 
      25              : /**
      26              :  * Closure for #auditor_denoms_cb_helper()
      27              :  */
      28              : struct AuditorDenomsIteratorContext
      29              : {
      30              :   /**
      31              :    * Function to call with the results.
      32              :    */
      33              :   TALER_EXCHANGEDB_AuditorDenominationsCallback cb;
      34              : 
      35              :   /**
      36              :    * Closure to pass to @e cb
      37              :    */
      38              :   void *cb_cls;
      39              : };
      40              : 
      41              : 
      42              : /**
      43              :  * Helper function for #TALER_EXCHANGEDB_iterate_auditor_denominations().
      44              :  * Calls the callback with each auditor and denomination pair.
      45              :  *
      46              :  * @param cls a `struct AuditorDenomsIteratorContext`
      47              :  * @param result db results
      48              :  * @param num_results number of results in @a result
      49              :  */
      50              : static void
      51           41 : auditor_denoms_cb_helper (void *cls,
      52              :                           PGresult *result,
      53              :                           unsigned int num_results)
      54              : {
      55           41 :   struct AuditorDenomsIteratorContext *dic = cls;
      56              : 
      57           41 :   for (unsigned int i = 0; i<num_results; i++)
      58              :   {
      59              :     struct TALER_AuditorPublicKeyP auditor_pub;
      60              :     struct TALER_DenominationHashP h_denom_pub;
      61              :     struct TALER_AuditorSignatureP auditor_sig;
      62            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      63            0 :       GNUNET_PQ_result_spec_auto_from_type ("auditor_pub",
      64              :                                             &auditor_pub),
      65            0 :       GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
      66              :                                             &h_denom_pub),
      67            0 :       GNUNET_PQ_result_spec_auto_from_type ("auditor_sig",
      68              :                                             &auditor_sig),
      69              :       GNUNET_PQ_result_spec_end
      70              :     };
      71              : 
      72            0 :     if (GNUNET_OK !=
      73            0 :         GNUNET_PQ_extract_result (result,
      74              :                                   rs,
      75              :                                   i))
      76              :     {
      77            0 :       GNUNET_break (0);
      78            0 :       return;
      79              :     }
      80            0 :     dic->cb (dic->cb_cls,
      81              :              &auditor_pub,
      82              :              &h_denom_pub,
      83              :              &auditor_sig);
      84              :   }
      85              : }
      86              : 
      87              : 
      88              : enum GNUNET_DB_QueryStatus
      89           41 : TALER_EXCHANGEDB_iterate_auditor_denominations (
      90              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
      91              :   TALER_EXCHANGEDB_AuditorDenominationsCallback cb,
      92              :   void *cb_cls)
      93              : {
      94           41 :   struct GNUNET_PQ_QueryParam params[] = {
      95              :     GNUNET_PQ_query_param_end
      96              :   };
      97           41 :   struct AuditorDenomsIteratorContext dic = {
      98              :     .cb = cb,
      99              :     .cb_cls = cb_cls,
     100              :   };
     101              :   /* Used in #postgres_iterate_auditor_denominations() */
     102           41 :   PREPARE (pg,
     103              :            "select_auditor_denoms",
     104              :            "SELECT"
     105              :            " auditors.auditor_pub"
     106              :            ",denominations.denom_pub_hash"
     107              :            ",auditor_denom_sigs.auditor_sig"
     108              :            " FROM auditor_denom_sigs"
     109              :            " JOIN auditors USING (auditor_uuid)"
     110              :            " JOIN denominations USING (denominations_serial)"
     111              :            " WHERE auditors.is_active;");
     112           41 :   return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     113              :                                                "select_auditor_denoms",
     114              :                                                params,
     115              :                                                &auditor_denoms_cb_helper,
     116              :                                                &dic);
     117              : }