Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2023, 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 backenddb/pg_lookup_transfer_summary.c
      18              :  * @brief Implementation of the lookup_transfer_summary function for Postgres
      19              :  * @author Iván Ávalos
      20              :  */
      21              : #include "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_lookup_transfer_summary.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : /**
      29              :  * Closure for #lookup_transfer_summary_cb().
      30              :  */
      31              : struct LookupTransferSummaryContext
      32              : {
      33              :   /**
      34              :    * Function to call for each order that was aggregated.
      35              :    */
      36              :   TALER_MERCHANTDB_TransferSummaryCallback cb;
      37              : 
      38              :   /**
      39              :    * Closure for @e cb.
      40              :    */
      41              :   void *cb_cls;
      42              : 
      43              :   /**
      44              :    * Plugin context.
      45              :    */
      46              :   struct PostgresClosure *pg;
      47              : 
      48              :   /**
      49              :    * Transaction result.
      50              :    */
      51              :   enum GNUNET_DB_QueryStatus qs;
      52              : };
      53              : 
      54              : 
      55              : /**
      56              :  * Function to be called with the results of a SELECT statement
      57              :  * that has returned @a num_results results.
      58              :  *
      59              :  * @param cls of type `struct LookupTransferSummaryContext *`
      60              :  * @param result the postgres result
      61              :  * @param num_results the number of results in @a result
      62              :  */
      63              : static void
      64            0 : lookup_transfer_summary_cb (void *cls,
      65              :                             PGresult *result,
      66              :                             unsigned int num_results)
      67              : {
      68            0 :   struct LookupTransferSummaryContext *ltdc = cls;
      69              : 
      70            0 :   for (unsigned int i = 0; i<num_results; i++)
      71              :   {
      72              :     char *order_id;
      73              :     struct TALER_Amount deposit_value;
      74              :     struct TALER_Amount deposit_fee;
      75            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      76            0 :       GNUNET_PQ_result_spec_string ("order_id",
      77              :                                     &order_id),
      78            0 :       TALER_PQ_result_spec_amount_with_currency ("exchange_deposit_value",
      79              :                                                  &deposit_value),
      80            0 :       TALER_PQ_result_spec_amount_with_currency ("exchange_deposit_fee",
      81              :                                                  &deposit_fee),
      82              :       GNUNET_PQ_result_spec_end
      83              :     };
      84              : 
      85            0 :     if (GNUNET_OK !=
      86            0 :         GNUNET_PQ_extract_result (result,
      87              :                                   rs,
      88              :                                   i))
      89              :     {
      90            0 :       GNUNET_break (0);
      91            0 :       ltdc->qs = GNUNET_DB_STATUS_HARD_ERROR;
      92            0 :       return;
      93              :     }
      94            0 :     ltdc->cb (ltdc->cb_cls,
      95              :               order_id,
      96              :               &deposit_value,
      97              :               &deposit_fee);
      98            0 :     GNUNET_PQ_cleanup_result (rs);
      99              :   }
     100            0 :   ltdc->qs = num_results;
     101              : }
     102              : 
     103              : 
     104              : enum GNUNET_DB_QueryStatus
     105            0 : TMH_PG_lookup_transfer_summary (void *cls,
     106              :                                 const char *exchange_url,
     107              :                                 const struct TALER_WireTransferIdentifierRawP *
     108              :                                 wtid,
     109              :                                 TALER_MERCHANTDB_TransferSummaryCallback cb,
     110              :                                 void *cb_cls)
     111              : {
     112            0 :   struct PostgresClosure *pg = cls;
     113            0 :   struct GNUNET_PQ_QueryParam params[] = {
     114            0 :     GNUNET_PQ_query_param_string (exchange_url),
     115            0 :     GNUNET_PQ_query_param_auto_from_type (wtid),
     116              :     GNUNET_PQ_query_param_end
     117              :   };
     118            0 :   struct LookupTransferSummaryContext ltdc = {
     119              :     .cb  = cb,
     120              :     .cb_cls = cb_cls,
     121              :     .pg = pg
     122              :   };
     123              :   enum GNUNET_DB_QueryStatus qs;
     124              : 
     125            0 :   check_connection (pg);
     126            0 :   PREPARE (pg,
     127              :            "lookup_transfer_summary",
     128              :            "SELECT"
     129              :            " mct.order_id"
     130              :            ",mtc.exchange_deposit_value"
     131              :            ",mtc.exchange_deposit_fee"
     132              :            " FROM merchant_expected_transfers met"
     133              :            "  JOIN merchant_expected_transfer_to_coin mtc"
     134              :            "    USING (expected_credit_serial)"
     135              :            "  JOIN merchant_deposits dep"
     136              :            "    USING (deposit_serial)"
     137              :            "  JOIN merchant_deposit_confirmations mcon"
     138              :            "    USING (deposit_confirmation_serial)"
     139              :            "  JOIN merchant_contract_terms mct"
     140              :            "    USING (order_serial)"
     141              :            " WHERE met.wtid=$2"
     142              :            "   AND met.exchange_url=$1");
     143              : 
     144            0 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     145              :     pg->conn,
     146              :     "lookup_transfer_summary",
     147              :     params,
     148              :     &lookup_transfer_summary_cb,
     149              :     &ltdc);
     150            0 :   if (0 >= qs)
     151            0 :     return qs;
     152            0 :   return ltdc.qs;
     153              : }