Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2024, 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_aml_statistics.c
      18             :  * @brief Implementation of the select_aml_statistics 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_aml_statistics.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Closure for #get_statistics_cb().
      31             :  */
      32             : struct GetStatisticsContext
      33             : {
      34             :   /**
      35             :    * Function to call per result.
      36             :    */
      37             :   TALER_EXCHANGEDB_AmlStatisticsCallback cb;
      38             : 
      39             :   /**
      40             :    * Closure for @e cb.
      41             :    */
      42             :   void *cb_cls;
      43             : 
      44             :   /**
      45             :    * Plugin context.
      46             :    */
      47             :   struct PostgresClosure *pg;
      48             : 
      49             :   /**
      50             :    * Flag set to #GNUNET_OK as long as everything is fine.
      51             :    */
      52             :   enum GNUNET_GenericReturnValue status;
      53             : 
      54             : };
      55             : 
      56             : 
      57             : /**
      58             :  * Invoke the callback for each result.
      59             :  *
      60             :  * @param cls a `struct GetStatisticsContext *`
      61             :  * @param result SQL result
      62             :  * @param num_results number of rows in @a result
      63             :  */
      64             : static void
      65           0 : get_statistics_cb (void *cls,
      66             :                    PGresult *result,
      67             :                    unsigned int num_results)
      68             : {
      69           0 :   struct GetStatisticsContext *ctx = cls;
      70             : 
      71           0 :   for (unsigned int i = 0; i < num_results; i++)
      72             :   {
      73             :     uint64_t val;
      74             :     char *name;
      75           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      76           0 :       GNUNET_PQ_result_spec_string ("name",
      77             :                                     &name),
      78           0 :       GNUNET_PQ_result_spec_uint64 ("value",
      79             :                                     &val),
      80             :       GNUNET_PQ_result_spec_end
      81             :     };
      82             : 
      83           0 :     if (GNUNET_OK !=
      84           0 :         GNUNET_PQ_extract_result (result,
      85             :                                   rs,
      86             :                                   i))
      87             :     {
      88           0 :       GNUNET_break (0);
      89           0 :       ctx->status = GNUNET_SYSERR;
      90           0 :       return;
      91             :     }
      92           0 :     ctx->cb (ctx->cb_cls,
      93             :              name,
      94             :              val);
      95           0 :     GNUNET_PQ_cleanup_result (rs);
      96             :   }
      97             : }
      98             : 
      99             : 
     100             : enum GNUNET_DB_QueryStatus
     101           0 : TEH_PG_select_aml_statistics (
     102             :   void *cls,
     103             :   size_t num_names,
     104             :   const char *names[static num_names],
     105             :   struct GNUNET_TIME_Timestamp start_date,
     106             :   struct GNUNET_TIME_Timestamp end_date,
     107             :   TALER_EXCHANGEDB_AmlStatisticsCallback cb,
     108             :   void *cb_cls)
     109           0 : {
     110           0 :   struct PostgresClosure *pg = cls;
     111           0 :   struct GetStatisticsContext ctx = {
     112             :     .cb = cb,
     113             :     .cb_cls = cb_cls,
     114             :     .pg = pg,
     115             :     .status = GNUNET_OK
     116             :   };
     117           0 :   struct GNUNET_PQ_QueryParam params[] = {
     118           0 :     GNUNET_PQ_query_param_array_ptrs_string (num_names,
     119             :                                              names,
     120             :                                              pg->conn),
     121           0 :     GNUNET_PQ_query_param_timestamp (&start_date),
     122           0 :     GNUNET_PQ_query_param_timestamp (&end_date),
     123             :     GNUNET_PQ_query_param_end
     124             :   };
     125             :   enum GNUNET_DB_QueryStatus qs;
     126             : 
     127           0 :   PREPARE (pg,
     128             :            "select_aml_statistics",
     129             :            "SELECT "
     130             :            " event_type AS name"
     131             :            ",COUNT(*) AS value"
     132             :            " FROM kyc_events"
     133             :            " WHERE event_type = ANY ($1)"
     134             :            "   AND event_timestamp >= $2"
     135             :            "   AND event_timestamp < $3"
     136             :            " GROUP BY event_type;");
     137           0 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     138             :                                              "select_aml_statistics",
     139             :                                              params,
     140             :                                              &get_statistics_cb,
     141             :                                              &ctx);
     142           0 :   GNUNET_PQ_cleanup_query_params_closures (params);
     143           0 :   if (GNUNET_OK != ctx.status)
     144           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     145           0 :   return qs;
     146             : }