Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2023 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 *wtid,
     108             :                                 TALER_MERCHANTDB_TransferSummaryCallback cb,
     109             :                                 void *cb_cls)
     110             : {
     111           0 :   struct PostgresClosure *pg = cls;
     112           0 :   struct GNUNET_PQ_QueryParam params[] = {
     113           0 :     GNUNET_PQ_query_param_string (exchange_url),
     114           0 :     GNUNET_PQ_query_param_auto_from_type (wtid),
     115             :     GNUNET_PQ_query_param_end
     116             :   };
     117           0 :   struct LookupTransferSummaryContext ltdc = {
     118             :     .cb  = cb,
     119             :     .cb_cls = cb_cls,
     120             :     .pg = pg
     121             :   };
     122             :   enum GNUNET_DB_QueryStatus qs;
     123             : 
     124           0 :   check_connection (pg);
     125           0 :   PREPARE (pg,
     126             :            "lookup_transfer_summary",
     127             :            "SELECT"
     128             :            " mct.order_id"
     129             :            ",mtc.exchange_deposit_value"
     130             :            ",mtc.exchange_deposit_fee"
     131             :            " FROM merchant_transfers mtr"
     132             :            "  JOIN merchant_transfer_to_coin mtc"
     133             :            "    USING (credit_serial)"
     134             :            "  JOIN merchant_deposits dep"
     135             :            "    USING (deposit_serial)"
     136             :            "  JOIN merchant_deposit_confirmations mcon"
     137             :            "    USING (deposit_confirmation_serial)"
     138             :            "  JOIN merchant_contract_terms mct"
     139             :            "    USING (order_serial)"
     140             :            " WHERE mtr.wtid=$2"
     141             :            "   AND mtr.exchange_url=$1");
     142             : 
     143           0 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     144             :     pg->conn,
     145             :     "lookup_transfer_summary",
     146             :     params,
     147             :     &lookup_transfer_summary_cb,
     148             :     &ltdc);
     149           0 :   if (0 >= qs)
     150           0 :     return qs;
     151           0 :   return ltdc.qs;
     152             : }