Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2024 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 src/auditordb/get_progress_points.c
      18              :  * @brief Implementation of the get_progress_points function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "auditor-database/get_progress_points.h"
      23              : #include "pg_helper.h"
      24              : 
      25              : 
      26              : struct ProgressContext
      27              : {
      28              : 
      29              :   /**
      30              :    * Function to call for each progress point.
      31              :    */
      32              :   TALER_AUDITORDB_ProgressPointsCallback cb;
      33              : 
      34              :   /**
      35              :    * Closure for @e cb
      36              :    */
      37              :   void *cb_cls;
      38              : 
      39              :   /**
      40              :    * Plugin context.
      41              :    */
      42              :   struct TALER_AUDITORDB_PostgresContext *pg;
      43              : 
      44              :   /**
      45              :    * Query status to return.
      46              :    */
      47              :   enum GNUNET_DB_QueryStatus qs;
      48              : };
      49              : 
      50              : 
      51              : /**
      52              :  * Helper function for #TALER_AUDITORDB_get_progress_points().
      53              :  * To be called with the results of a SELECT statement
      54              :  * that has returned @a num_results results.
      55              :  *
      56              :  * @param cls closure of type `struct ProgressContext *`
      57              :  * @param result the postgres result
      58              :  * @param num_results the number of results in @a result
      59              :  */
      60              : static void
      61            0 : progress_cb (void *cls,
      62              :              PGresult *result,
      63              :              unsigned int num_results)
      64              : {
      65            0 :   struct ProgressContext *dcc = cls;
      66              : 
      67            0 :   for (unsigned int i = 0; i < num_results; i++)
      68              :   {
      69              :     struct TALER_AUDITORDB_Progress dc;
      70            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      71            0 :       GNUNET_PQ_result_spec_string ("progress_key",
      72              :                                     &dc.progress_key),
      73            0 :       GNUNET_PQ_result_spec_uint64 ("progress_offset",
      74              :                                     &dc.progress_offset),
      75              :       GNUNET_PQ_result_spec_end
      76              :     };
      77              :     enum GNUNET_GenericReturnValue rval;
      78              : 
      79            0 :     if (GNUNET_OK !=
      80            0 :         GNUNET_PQ_extract_result (result,
      81              :                                   rs,
      82              :                                   i))
      83              :     {
      84            0 :       GNUNET_break (0);
      85            0 :       dcc->qs = GNUNET_DB_STATUS_HARD_ERROR;
      86            0 :       return;
      87              :     }
      88            0 :     dcc->qs = i + 1;
      89            0 :     rval = dcc->cb (dcc->cb_cls,
      90              :                     &dc);
      91            0 :     GNUNET_PQ_cleanup_result (rs);
      92            0 :     if (GNUNET_OK != rval)
      93            0 :       break;
      94              :   }
      95              : }
      96              : 
      97              : 
      98              : enum GNUNET_DB_QueryStatus
      99            0 : TALER_AUDITORDB_get_progress_points (
     100              :   struct TALER_AUDITORDB_PostgresContext *pg,
     101              :   const char *progress_key,
     102              :   TALER_AUDITORDB_ProgressPointsCallback cb,
     103              :   void *cb_cls)
     104              : {
     105            0 :   struct GNUNET_PQ_QueryParam params[] = {
     106              :     NULL == progress_key
     107            0 :     ? GNUNET_PQ_query_param_null ()
     108            0 :     : GNUNET_PQ_query_param_string (progress_key),
     109              :     GNUNET_PQ_query_param_end
     110              :   };
     111            0 :   struct ProgressContext dcc = {
     112              :     .cb = cb,
     113              :     .cb_cls = cb_cls,
     114              :     .pg = pg
     115              :   };
     116              :   enum GNUNET_DB_QueryStatus qs;
     117              : 
     118            0 :   PREPARE (pg,
     119              :            "auditor_progress_points_get",
     120              :            "SELECT"
     121              :            " progress_key"
     122              :            ",progress_offset"
     123              :            " FROM auditor_progress"
     124              :            " WHERE ($1::TEXT IS NULL OR progress_key = $1)"
     125              :            );
     126            0 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     127              :     pg->conn,
     128              :     "auditor_progress_points_get",
     129              :     params,
     130              :     &progress_cb,
     131              :     &dcc);
     132            0 :   if (qs > 0)
     133            0 :     return dcc.qs;
     134            0 :   GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
     135            0 :   return qs;
     136              : }