Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2022, 2025 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_open_transfers.c
      18             :  * @brief Implementation of the select_open_transfers 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_open_transfers.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Context used for open_transfers_cb().
      31             :  */
      32             : struct SelectOpenTransfersContext
      33             : {
      34             :   /**
      35             :    * Postgres context.
      36             :    */
      37             :   struct PostgresClosure *pg;
      38             : 
      39             :   /**
      40             :    * Function to call with the results.
      41             :    */
      42             :   TALER_MERCHANTDB_OpenTransferCallback cb;
      43             : 
      44             :   /**
      45             :    * Closure for @a cb.
      46             :    */
      47             :   void *cb_cls;
      48             : 
      49             :   /**
      50             :    * Internal result.
      51             :    */
      52             :   enum GNUNET_DB_QueryStatus qs;
      53             : };
      54             : 
      55             : 
      56             : /**
      57             :  * Function to be called with the results of a SELECT statement
      58             :  * that has returned @a num_results results about rewards.
      59             :  *
      60             :  * @param[in,out] cls of type `struct SelectOpenTransfersContext *`
      61             :  * @param result the postgres result
      62             :  * @param num_results the number of results in @a result
      63             :  */
      64             : static void
      65          12 : open_transfers_cb (void *cls,
      66             :                    PGresult *result,
      67             :                    unsigned int num_results)
      68             : {
      69          12 :   struct SelectOpenTransfersContext *plc = cls;
      70             : 
      71          20 :   for (unsigned int i = 0; i < num_results; i++)
      72             :   {
      73             :     uint64_t rowid;
      74             :     char *instance_id;
      75             :     char *exchange_url;
      76             :     struct TALER_FullPayto payto_uri;
      77             :     struct TALER_WireTransferIdentifierRawP wtid;
      78             :     struct GNUNET_TIME_Absolute retry_time;
      79           8 :     struct GNUNET_PQ_ResultSpec rs[] = {
      80           8 :       GNUNET_PQ_result_spec_uint64 ("expected_credit_serial",
      81             :                                     &rowid),
      82           8 :       GNUNET_PQ_result_spec_string ("instance_id",
      83             :                                     &instance_id),
      84           8 :       GNUNET_PQ_result_spec_string ("exchange_url",
      85             :                                     &exchange_url),
      86           8 :       GNUNET_PQ_result_spec_string ("payto_uri",
      87             :                                     &payto_uri.full_payto),
      88           8 :       GNUNET_PQ_result_spec_auto_from_type ("wtid",
      89             :                                             &wtid),
      90           8 :       GNUNET_PQ_result_spec_absolute_time ("retry_time",
      91             :                                            &retry_time),
      92             :       GNUNET_PQ_result_spec_end
      93             :     };
      94             : 
      95           8 :     if (GNUNET_OK !=
      96           8 :         GNUNET_PQ_extract_result (result,
      97             :                                   rs,
      98             :                                   i))
      99             :     {
     100           0 :       GNUNET_break (0);
     101           0 :       plc->qs = GNUNET_DB_STATUS_HARD_ERROR;
     102           0 :       return;
     103             :     }
     104           8 :     plc->cb (plc->cb_cls,
     105             :              rowid,
     106             :              instance_id,
     107             :              exchange_url,
     108             :              payto_uri,
     109             :              &wtid,
     110             :              retry_time);
     111           8 :     GNUNET_PQ_cleanup_result (rs);
     112             :   }
     113             : }
     114             : 
     115             : 
     116             : enum GNUNET_DB_QueryStatus
     117          12 : TMH_PG_select_open_transfers (void *cls,
     118             :                               uint64_t limit,
     119             :                               TALER_MERCHANTDB_OpenTransferCallback cb,
     120             :                               void *cb_cls)
     121             : {
     122          12 :   struct PostgresClosure *pg = cls;
     123          12 :   struct SelectOpenTransfersContext plc = {
     124             :     .pg = pg,
     125             :     .cb = cb,
     126             :     .cb_cls = cb_cls
     127             :   };
     128          12 :   struct GNUNET_PQ_QueryParam params[] = {
     129          12 :     GNUNET_PQ_query_param_uint64 (&limit),
     130             :     GNUNET_PQ_query_param_end
     131             :   };
     132             :   enum GNUNET_DB_QueryStatus qs;
     133             : 
     134          12 :   PREPARE (pg,
     135             :            "select_open_transfers",
     136             :            "SELECT"
     137             :            " met.expected_credit_serial"
     138             :            ",mi.merchant_id AS instance_id"
     139             :            ",met.exchange_url"
     140             :            ",ma.payto_uri"
     141             :            ",met.wtid"
     142             :            ",met.retry_time"
     143             :            " FROM merchant_expected_transfers met"
     144             :            " JOIN merchant_accounts ma"
     145             :            "   USING (account_serial)"
     146             :            " JOIN merchant_instances mi"
     147             :            "   ON (ma.merchant_serial=mi.merchant_serial)"
     148             :            " WHERE retry_needed"
     149             :            " ORDER BY retry_time ASC"
     150             :            " LIMIT $1;");
     151          12 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     152             :     pg->conn,
     153             :     "select_open_transfers",
     154             :     params,
     155             :     &open_transfers_cb,
     156             :     &plc);
     157          12 :   if (0 != plc.qs)
     158           0 :     return plc.qs;
     159          12 :   return qs;
     160             : }