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 backenddb/pg_select_accounts_by_exchange.c
      18             :  * @brief Implementation of the select_accounts_by_exchange function for Postgres
      19             :  * @author Christian Grothoff
      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_select_accounts_by_exchange.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Closure for #parse_accounts.
      31             :  */
      32             : struct SelectAccountContext
      33             : {
      34             :   /**
      35             :    * Function to call on each result.
      36             :    */
      37             :   TALER_MERCHANTDB_ExchangeAccountCallback cb;
      38             : 
      39             :   /**
      40             :    * Closure for @e cb.
      41             :    */
      42             :   void *cb_cls;
      43             : 
      44             :   /**
      45             :    * Set to true on failure.
      46             :    */
      47             :   bool failed;
      48             : };
      49             : 
      50             : /**
      51             :  * Function to be called with the results of a SELECT statement
      52             :  * that has returned @a num_results results about accounts.
      53             :  *
      54             :  * @param cls of type `struct SelectAccountContext *`
      55             :  * @param result the postgres result
      56             :  * @param num_results the number of results in @a result
      57             :  */
      58             : static void
      59           0 : parse_accounts (void *cls,
      60             :                 PGresult *result,
      61             :                 unsigned int num_results)
      62             : {
      63           0 :   struct SelectAccountContext *ctx = cls;
      64             : 
      65           0 :   for (unsigned int i = 0; i < num_results; i++)
      66             :   {
      67             :     struct TALER_FullPayto payto_uri;
      68           0 :     char *conversion_url = NULL;
      69             :     json_t *debit_restrictions;
      70             :     json_t *credit_restrictions;
      71             :     struct TALER_MasterSignatureP master_sig;
      72           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      73           0 :       GNUNET_PQ_result_spec_auto_from_type ("master_sig",
      74             :                                             &master_sig),
      75           0 :       GNUNET_PQ_result_spec_string ("payto_uri",
      76             :                                     &payto_uri.full_payto),
      77           0 :       GNUNET_PQ_result_spec_allow_null (
      78             :         GNUNET_PQ_result_spec_string ("conversion_url",
      79             :                                       &conversion_url),
      80             :         NULL),
      81           0 :       TALER_PQ_result_spec_json ("debit_restrictions",
      82             :                                  &debit_restrictions),
      83           0 :       TALER_PQ_result_spec_json ("credit_restrictions",
      84             :                                  &credit_restrictions),
      85             :       GNUNET_PQ_result_spec_end
      86             :     };
      87             : 
      88           0 :     if (GNUNET_OK !=
      89           0 :         GNUNET_PQ_extract_result (result,
      90             :                                   rs,
      91             :                                   i))
      92             :     {
      93           0 :       GNUNET_break (0);
      94           0 :       ctx->failed = true;
      95           0 :       return;
      96             :     }
      97           0 :     ctx->cb (ctx->cb_cls,
      98             :              payto_uri,
      99             :              conversion_url,
     100             :              debit_restrictions,
     101             :              credit_restrictions,
     102             :              &master_sig);
     103           0 :     GNUNET_PQ_cleanup_result (rs);
     104             :   }
     105             : }
     106             : 
     107             : 
     108             : enum GNUNET_DB_QueryStatus
     109           0 : TMH_PG_select_accounts_by_exchange (
     110             :   void *cls,
     111             :   const struct TALER_MasterPublicKeyP *master_pub,
     112             :   TALER_MERCHANTDB_ExchangeAccountCallback cb,
     113             :   void *cb_cls)
     114             : {
     115           0 :   struct PostgresClosure *pg = cls;
     116           0 :   struct SelectAccountContext ctx = {
     117             :     .cb = cb,
     118             :     .cb_cls = cb_cls
     119             :   };
     120           0 :   struct GNUNET_PQ_QueryParam params[] = {
     121           0 :     GNUNET_PQ_query_param_auto_from_type (master_pub),
     122             :     GNUNET_PQ_query_param_end
     123             :   };
     124             :   enum GNUNET_DB_QueryStatus qs;
     125             : 
     126           0 :   check_connection (pg);
     127           0 :   PREPARE (pg,
     128             :            "select_exchange_accounts",
     129             :            "SELECT"
     130             :            " payto_uri"
     131             :            ",conversion_url"
     132             :            ",debit_restrictions"
     133             :            ",credit_restrictions"
     134             :            ",master_sig"
     135             :            " FROM merchant_exchange_accounts"
     136             :            " WHERE master_pub=$1;");
     137           0 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     138             :     pg->conn,
     139             :     "select_exchange_accounts",
     140             :     params,
     141             :     &parse_accounts,
     142             :     &ctx);
     143           0 :   if (ctx.failed)
     144           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     145           0 :   return qs;
     146             : }