Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2022 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_get_wire_fees.c
      18              :  * @brief Implementation of the get_wire_fees 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_wire_fees.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : /**
      29              :  * Closure for #get_wire_fees_cb().
      30              :  */
      31              : struct GetWireFeesContext
      32              : {
      33              :   /**
      34              :    * Function to call per result.
      35              :    */
      36              :   TALER_EXCHANGEDB_WireFeeCallback 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              :    * Flag set to #GNUNET_OK as long as everything is fine.
      50              :    */
      51              :   enum GNUNET_GenericReturnValue status;
      52              : 
      53              : };
      54              : 
      55              : 
      56              : /**
      57              :  * Invoke the callback for each result.
      58              :  *
      59              :  * @param cls a `struct GetWireFeesContext *`
      60              :  * @param result SQL result
      61              :  * @param num_results number of rows in @a result
      62              :  */
      63              : static void
      64           19 : get_wire_fees_cb (void *cls,
      65              :                   PGresult *result,
      66              :                   unsigned int num_results)
      67              : {
      68           19 :   struct GetWireFeesContext *ctx = cls;
      69           19 :   struct PostgresClosure *pg = ctx->pg;
      70              : 
      71           38 :   for (unsigned int i = 0; i < num_results; i++)
      72              :   {
      73              :     struct TALER_MasterSignatureP master_sig;
      74              :     struct TALER_WireFeeSet fees;
      75              :     struct GNUNET_TIME_Timestamp start_date;
      76              :     struct GNUNET_TIME_Timestamp end_date;
      77           19 :     struct GNUNET_PQ_ResultSpec rs[] = {
      78           19 :       TALER_PQ_RESULT_SPEC_AMOUNT ("wire_fee",
      79              :                                    &fees.wire),
      80           19 :       TALER_PQ_RESULT_SPEC_AMOUNT ("closing_fee",
      81              :                                    &fees.closing),
      82           19 :       GNUNET_PQ_result_spec_timestamp ("start_date",
      83              :                                        &start_date),
      84           19 :       GNUNET_PQ_result_spec_timestamp ("end_date",
      85              :                                        &end_date),
      86           19 :       GNUNET_PQ_result_spec_auto_from_type ("master_sig",
      87              :                                             &master_sig),
      88              :       GNUNET_PQ_result_spec_end
      89              :     };
      90              : 
      91           19 :     if (GNUNET_OK !=
      92           19 :         GNUNET_PQ_extract_result (result,
      93              :                                   rs,
      94              :                                   i))
      95              :     {
      96            0 :       GNUNET_break (0);
      97            0 :       ctx->status = GNUNET_SYSERR;
      98            0 :       return;
      99              :     }
     100           19 :     ctx->cb (ctx->cb_cls,
     101              :              &fees,
     102              :              start_date,
     103              :              end_date,
     104              :              &master_sig);
     105           19 :     GNUNET_PQ_cleanup_result (rs);
     106              :   }
     107              : }
     108              : 
     109              : 
     110              : enum GNUNET_DB_QueryStatus
     111           19 : TEH_PG_get_wire_fees (void *cls,
     112              :                       const char *wire_method,
     113              :                       TALER_EXCHANGEDB_WireFeeCallback cb,
     114              :                       void *cb_cls)
     115              : {
     116           19 :   struct PostgresClosure *pg = cls;
     117           19 :   struct GNUNET_PQ_QueryParam params[] = {
     118           19 :     GNUNET_PQ_query_param_string (wire_method),
     119              :     GNUNET_PQ_query_param_end
     120              :   };
     121           19 :   struct GetWireFeesContext ctx = {
     122              :     .cb = cb,
     123              :     .cb_cls = cb_cls,
     124              :     .pg = pg,
     125              :     .status = GNUNET_OK
     126              :   };
     127              :   enum GNUNET_DB_QueryStatus qs;
     128              : 
     129           19 :   PREPARE (pg,
     130              :            "get_wire_fees",
     131              :            "SELECT"
     132              :            " wire_fee"
     133              :            ",closing_fee"
     134              :            ",start_date"
     135              :            ",end_date"
     136              :            ",master_sig"
     137              :            " FROM wire_fee"
     138              :            " WHERE wire_method=$1");
     139           19 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     140              :                                              "get_wire_fees",
     141              :                                              params,
     142              :                                              &get_wire_fees_cb,
     143              :                                              &ctx);
     144           19 :   if (GNUNET_OK != ctx.status)
     145            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     146           19 :   return qs;
     147              : }