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pg_select_all_purse_deletions_above_serial_id.c (4204B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2025 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_select_all_purse_deletions_above_serial_id.c
     18  * @brief Implementation of the select_all_purse_deletions_above_serial_id 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_all_purse_deletions_above_serial_id.h"
     26 #include "pg_helper.h"
     27 
     28 
     29 /**
     30  * Closure for #all_purse_deletion_serial_helper_cb().
     31  */
     32 struct AllPurseDeletionSerialContext
     33 {
     34 
     35   /**
     36    * Callback to call.
     37    */
     38   TALER_EXCHANGEDB_AllPurseDeletionsCallback 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    * Status code, set to #GNUNET_SYSERR on hard errors.
     52    */
     53   enum GNUNET_GenericReturnValue status;
     54 };
     55 
     56 
     57 /**
     58  * Helper function to be called with the results of a SELECT statement
     59  * that has returned @a num_results results.
     60  *
     61  * @param cls closure of type `struct PurseRefundSerialContext`
     62  * @param result the postgres result
     63  * @param num_results the number of results in @a result
     64  */
     65 static void
     66 all_purse_deletion_serial_helper_cb (void *cls,
     67                                      PGresult *result,
     68                                      unsigned int num_results)
     69 {
     70   struct AllPurseDeletionSerialContext *dsc = cls;
     71 
     72   for (unsigned int i = 0; i<num_results; i++)
     73   {
     74     struct TALER_PurseContractPublicKeyP purse_pub;
     75     struct TALER_PurseContractSignatureP purse_sig;
     76     uint64_t rowid;
     77     struct GNUNET_PQ_ResultSpec rs[] = {
     78       GNUNET_PQ_result_spec_auto_from_type ("purse_pub",
     79                                             &purse_pub),
     80       GNUNET_PQ_result_spec_auto_from_type ("purse_sig",
     81                                             &purse_sig),
     82       GNUNET_PQ_result_spec_uint64 ("purse_deletion_serial_id",
     83                                     &rowid),
     84       GNUNET_PQ_result_spec_end
     85     };
     86     enum GNUNET_GenericReturnValue ret;
     87 
     88     if (GNUNET_OK !=
     89         GNUNET_PQ_extract_result (result,
     90                                   rs,
     91                                   i))
     92     {
     93       GNUNET_break (0);
     94       dsc->status = GNUNET_SYSERR;
     95       return;
     96     }
     97     ret = dsc->cb (dsc->cb_cls,
     98                    rowid,
     99                    &purse_pub,
    100                    &purse_sig);
    101     GNUNET_PQ_cleanup_result (rs);
    102     if (GNUNET_OK != ret)
    103       break;
    104   }
    105 }
    106 
    107 
    108 enum GNUNET_DB_QueryStatus
    109 TEH_PG_select_all_purse_deletions_above_serial_id (
    110   void *cls,
    111   uint64_t serial_id,
    112   TALER_EXCHANGEDB_AllPurseDeletionsCallback cb,
    113   void *cb_cls)
    114 {
    115   struct PostgresClosure *pg = cls;
    116   struct GNUNET_PQ_QueryParam params[] = {
    117     GNUNET_PQ_query_param_uint64 (&serial_id),
    118     GNUNET_PQ_query_param_end
    119   };
    120   struct AllPurseDeletionSerialContext dsc = {
    121     .cb = cb,
    122     .cb_cls = cb_cls,
    123     .pg = pg,
    124     .status = GNUNET_OK
    125   };
    126   enum GNUNET_DB_QueryStatus qs;
    127 
    128   PREPARE (pg,
    129            "audit_select_all_purse_deletions_above_serial_id",
    130            "SELECT"
    131            " purse_pub"
    132            ",purse_sig"
    133            ",purse_deletion_serial_id"
    134            " FROM purse_deletion"
    135            " WHERE purse_deletion_serial_id>=$1"
    136            " ORDER BY purse_deletion_serial_id ASC;");
    137   qs = GNUNET_PQ_eval_prepared_multi_select (
    138     pg->conn,
    139     "audit_select_all_purse_deletions_above_serial_id",
    140     params,
    141     &all_purse_deletion_serial_helper_cb,
    142     &dsc);
    143   if (GNUNET_OK != dsc.status)
    144     return GNUNET_DB_STATUS_HARD_ERROR;
    145   return qs;
    146 }