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              : }