Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2022, 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_select_wirewatch_accounts.c
      18              :  * @brief Implementation of the select_wirewatch_accounts 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_wirewatch_accounts.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : 
      29              : /**
      30              :  * Closure for #handle_results().
      31              :  */
      32              : struct Context
      33              : {
      34              :   /**
      35              :    * Function to call with results.
      36              :    */
      37              :   TALER_MERCHANTDB_WirewatchWorkCallback cb;
      38              : 
      39              :   /**
      40              :    * Closure for @e cb.
      41              :    */
      42              :   void *cb_cls;
      43              : 
      44              :   /**
      45              :    * Set to true if the parsing failed.
      46              :    */
      47              :   bool failure;
      48              : };
      49              : 
      50              : 
      51              : /**
      52              :  * Function to be called with the results of a SELECT statement
      53              :  * that has returned @a num_results results about accounts.
      54              :  *
      55              :  * @param cls of type `struct Context *`
      56              :  * @param result the postgres result
      57              :  * @param num_results the number of results in @a result
      58              :  */
      59              : static void
      60            4 : handle_results (void *cls,
      61              :                 PGresult *result,
      62              :                 unsigned int num_results)
      63              : {
      64            4 :   struct Context *ctx = cls;
      65              : 
      66            8 :   for (unsigned int i = 0; i < num_results; i++)
      67              :   {
      68              :     char *instance;
      69              :     struct TALER_FullPayto payto_uri;
      70              :     char *facade_url;
      71              :     json_t *credential;
      72              :     uint64_t last_serial;
      73            4 :     struct GNUNET_PQ_ResultSpec rs[] = {
      74            4 :       GNUNET_PQ_result_spec_string ("merchant_id",
      75              :                                     &instance),
      76            4 :       GNUNET_PQ_result_spec_string ("payto_uri",
      77              :                                     &payto_uri.full_payto),
      78            4 :       GNUNET_PQ_result_spec_string ("credit_facade_url",
      79              :                                     &facade_url),
      80            4 :       GNUNET_PQ_result_spec_allow_null (
      81              :         TALER_PQ_result_spec_json ("credit_facade_credentials",
      82              :                                    &credential),
      83              :         NULL),
      84            4 :       GNUNET_PQ_result_spec_uint64 ("last_bank_serial",
      85              :                                     &last_serial),
      86              :       GNUNET_PQ_result_spec_end
      87              :     };
      88              : 
      89            4 :     if (GNUNET_OK !=
      90            4 :         GNUNET_PQ_extract_result (result,
      91              :                                   rs,
      92              :                                   i))
      93              :     {
      94            0 :       GNUNET_break (0);
      95            0 :       ctx->failure = true;
      96            0 :       return;
      97              :     }
      98            4 :     ctx->cb (ctx->cb_cls,
      99              :              instance,
     100              :              payto_uri,
     101              :              facade_url,
     102              :              credential,
     103              :              last_serial);
     104            4 :     GNUNET_PQ_cleanup_result (rs);
     105              :   }
     106              : }
     107              : 
     108              : 
     109              : enum GNUNET_DB_QueryStatus
     110            4 : TMH_PG_select_wirewatch_accounts (
     111              :   void *cls,
     112              :   TALER_MERCHANTDB_WirewatchWorkCallback cb,
     113              :   void *cb_cls)
     114              : {
     115            4 :   struct PostgresClosure *pg = cls;
     116            4 :   struct Context ctx = {
     117              :     .cb = cb,
     118              :     .cb_cls = cb_cls
     119              :   };
     120            4 :   struct GNUNET_PQ_QueryParam params[] = {
     121              :     GNUNET_PQ_query_param_end
     122              :   };
     123              :   enum GNUNET_DB_QueryStatus qs;
     124              : 
     125            4 :   PREPARE (pg,
     126              :            "select_wirewatch_progress",
     127              :            "SELECT"
     128              :            " last_bank_serial"
     129              :            ",merchant_id"
     130              :            ",payto_uri"
     131              :            ",credit_facade_url"
     132              :            ",credit_facade_credentials::TEXT"
     133              :            " FROM merchant_accounts"
     134              :            " JOIN merchant_instances"
     135              :            "   USING (merchant_serial)"
     136              :            " WHERE active"
     137              :            "   AND credit_facade_url IS NOT NULL");
     138            4 :   check_connection (pg);
     139            4 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     140              :                                              "select_wirewatch_progress",
     141              :                                              params,
     142              :                                              &handle_results,
     143              :                                              &ctx);
     144            4 :   if (ctx.failure)
     145            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     146            4 :   return qs;
     147              : }