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           2 : handle_results (void *cls,
      61             :                 PGresult *result,
      62             :                 unsigned int num_results)
      63             : {
      64           2 :   struct Context *ctx = cls;
      65             : 
      66           4 :   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           2 :     struct GNUNET_PQ_ResultSpec rs[] = {
      74           2 :       GNUNET_PQ_result_spec_string ("merchant_id",
      75             :                                     &instance),
      76           2 :       GNUNET_PQ_result_spec_string ("payto_uri",
      77             :                                     &payto_uri.full_payto),
      78           2 :       GNUNET_PQ_result_spec_string ("credit_facade_url",
      79             :                                     &facade_url),
      80           2 :       GNUNET_PQ_result_spec_allow_null (
      81             :         TALER_PQ_result_spec_json ("credit_facade_credentials",
      82             :                                    &credential),
      83             :         NULL),
      84           2 :       GNUNET_PQ_result_spec_uint64 ("last_bank_serial",
      85             :                                     &last_serial),
      86             :       GNUNET_PQ_result_spec_end
      87             :     };
      88             : 
      89           2 :     if (GNUNET_OK !=
      90           2 :         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           2 :     ctx->cb (ctx->cb_cls,
      99             :              instance,
     100             :              payto_uri,
     101             :              facade_url,
     102             :              credential,
     103             :              last_serial);
     104           2 :     GNUNET_PQ_cleanup_result (rs);
     105             :   }
     106             : }
     107             : 
     108             : 
     109             : enum GNUNET_DB_QueryStatus
     110           2 : TMH_PG_select_wirewatch_accounts (
     111             :   void *cls,
     112             :   TALER_MERCHANTDB_WirewatchWorkCallback cb,
     113             :   void *cb_cls)
     114             : {
     115           2 :   struct PostgresClosure *pg = cls;
     116           2 :   struct Context ctx = {
     117             :     .cb = cb,
     118             :     .cb_cls = cb_cls
     119             :   };
     120           2 :   struct GNUNET_PQ_QueryParam params[] = {
     121             :     GNUNET_PQ_query_param_end
     122             :   };
     123             :   enum GNUNET_DB_QueryStatus qs;
     124             : 
     125           2 :   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"
     133             :            " FROM merchant_accounts"
     134             :            " JOIN merchant_instances"
     135             :            "   USING (merchant_serial)"
     136             :            " WHERE active"
     137             :            "   AND credit_facade_url IS NOT NULL");
     138           2 :   check_connection (pg);
     139           2 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     140             :                                              "select_wirewatch_progress",
     141             :                                              params,
     142             :                                              &handle_results,
     143             :                                              &ctx);
     144           2 :   if (ctx.failure)
     145           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     146           2 :   return qs;
     147             : }