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::TEXT"
     133              :            ",credit_restrictions::TEXT"
     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              : }