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 auditordb/pg_get_progress_points.c
      18             :  * @brief Implementation of the get_progress_points 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_get_progress_points.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : struct ProgressContext
      30             : {
      31             : 
      32             :   /**
      33             :    * Function to call for each progress point.
      34             :    */
      35             :   TALER_AUDITORDB_ProgressPointsCallback cb;
      36             : 
      37             :   /**
      38             :    * Closure for @e cb
      39             :    */
      40             :   void *cb_cls;
      41             : 
      42             :   /**
      43             :    * Plugin context.
      44             :    */
      45             :   struct PostgresClosure *pg;
      46             : 
      47             :   /**
      48             :    * Query status to return.
      49             :    */
      50             :   enum GNUNET_DB_QueryStatus qs;
      51             : };
      52             : 
      53             : 
      54             : /**
      55             :  * Helper function for #TAH_PG_get_progress_points().
      56             :  * To be called with the results of a SELECT statement
      57             :  * that has returned @a num_results results.
      58             :  *
      59             :  * @param cls closure of type `struct ProgressContext *`
      60             :  * @param result the postgres result
      61             :  * @param num_results the number of results in @a result
      62             :  */
      63             : static void
      64           0 : progress_cb (void *cls,
      65             :              PGresult *result,
      66             :              unsigned int num_results)
      67             : {
      68           0 :   struct ProgressContext *dcc = cls;
      69             : 
      70           0 :   for (unsigned int i = 0; i < num_results; i++)
      71             :   {
      72             :     struct TALER_AUDITORDB_Progress dc;
      73           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      74           0 :       GNUNET_PQ_result_spec_string ("progress_key",
      75             :                                     &dc.progress_key),
      76           0 :       GNUNET_PQ_result_spec_uint64 ("progress_offset",
      77             :                                     &dc.progress_offset),
      78             :       GNUNET_PQ_result_spec_end
      79             :     };
      80             :     enum GNUNET_GenericReturnValue rval;
      81             : 
      82           0 :     if (GNUNET_OK !=
      83           0 :         GNUNET_PQ_extract_result (result,
      84             :                                   rs,
      85             :                                   i))
      86             :     {
      87           0 :       GNUNET_break (0);
      88           0 :       dcc->qs = GNUNET_DB_STATUS_HARD_ERROR;
      89           0 :       return;
      90             :     }
      91           0 :     dcc->qs = i + 1;
      92           0 :     rval = dcc->cb (dcc->cb_cls,
      93             :                     &dc);
      94           0 :     GNUNET_PQ_cleanup_result (rs);
      95           0 :     if (GNUNET_OK != rval)
      96           0 :       break;
      97             :   }
      98             : }
      99             : 
     100             : 
     101             : enum GNUNET_DB_QueryStatus
     102           0 : TAH_PG_get_progress_points (
     103             :   void *cls,
     104             :   const char *progress_key,
     105             :   TALER_AUDITORDB_ProgressPointsCallback cb,
     106             :   void *cb_cls)
     107             : {
     108           0 :   struct PostgresClosure *pg = cls;
     109           0 :   struct GNUNET_PQ_QueryParam params[] = {
     110             :     NULL == progress_key
     111           0 :     ? GNUNET_PQ_query_param_null ()
     112           0 :     : GNUNET_PQ_query_param_string (progress_key),
     113             :     GNUNET_PQ_query_param_end
     114             :   };
     115           0 :   struct ProgressContext dcc = {
     116             :     .cb = cb,
     117             :     .cb_cls = cb_cls,
     118             :     .pg = pg
     119             :   };
     120             :   enum GNUNET_DB_QueryStatus qs;
     121             : 
     122           0 :   PREPARE (pg,
     123             :            "auditor_progress_points_get",
     124             :            "SELECT"
     125             :            " progress_key"
     126             :            ",progress_offset"
     127             :            " FROM auditor_progress"
     128             :            " WHERE ($1::TEXT IS NULL OR progress_key = $1)"
     129             :            );
     130           0 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     131             :     pg->conn,
     132             :     "auditor_progress_points_get",
     133             :     params,
     134             :     &progress_cb,
     135             :     &dcc);
     136           0 :   if (qs > 0)
     137           0 :     return dcc.qs;
     138           0 :   GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
     139           0 :   return qs;
     140             : }