Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2022, 2024 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 pg_get_unfinished_close_requests.c
      18             :  * @brief Low-level (statement-level) Postgres database access for the exchange
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "taler/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_get_unfinished_close_requests.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Closure for #reserve_close_cb().
      31             :  */
      32             : struct CloseReserveContext
      33             : {
      34             :   /**
      35             :    * Function to call for each to be closed reserve.
      36             :    */
      37             :   TALER_EXCHANGEDB_ReserveExpiredCallback rec;
      38             : 
      39             :   /**
      40             :    * Closure to give to @e rec.
      41             :    */
      42             :   void *rec_cls;
      43             : 
      44             :   /**
      45             :    * Plugin context.
      46             :    */
      47             :   struct PostgresClosure *pg;
      48             : 
      49             :   /**
      50             :    * Set to #GNUNET_SYSERR on error.
      51             :    */
      52             :   enum GNUNET_GenericReturnValue status;
      53             : };
      54             : 
      55             : 
      56             : /**
      57             :  * Function to be called with the results of a SELECT statement
      58             :  * that has returned @a num_results results.
      59             :  *
      60             :  * @param cls closure
      61             :  * @param result the postgres result
      62             :  * @param num_results the number of results in @a result
      63             :  */
      64             : static void
      65          33 : reserve_cb (void *cls,
      66             :             PGresult *result,
      67             :             unsigned int num_results)
      68             : {
      69          33 :   struct CloseReserveContext *erc = cls;
      70          33 :   struct PostgresClosure *pg = erc->pg;
      71          33 :   enum GNUNET_GenericReturnValue ret = GNUNET_OK;
      72             : 
      73          35 :   for (unsigned int i = 0; i<num_results; i++)
      74             :   {
      75             :     struct GNUNET_TIME_Timestamp exp_date;
      76             :     struct TALER_FullPayto account_details;
      77             :     struct TALER_ReservePublicKeyP reserve_pub;
      78             :     struct TALER_Amount remaining_balance;
      79             :     uint64_t close_request_row;
      80           2 :     struct GNUNET_PQ_ResultSpec rs[] = {
      81           2 :       GNUNET_PQ_result_spec_timestamp ("expiration_date",
      82             :                                        &exp_date),
      83           2 :       GNUNET_PQ_result_spec_string ("account_details",
      84             :                                     &account_details.full_payto),
      85           2 :       GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
      86             :                                             &reserve_pub),
      87           2 :       TALER_PQ_RESULT_SPEC_AMOUNT ("close",
      88             :                                    &remaining_balance),
      89           2 :       GNUNET_PQ_result_spec_uint64 ("close_request_serial_id",
      90             :                                     &close_request_row),
      91             :       GNUNET_PQ_result_spec_end
      92             :     };
      93             : 
      94           2 :     if (GNUNET_OK !=
      95           2 :         GNUNET_PQ_extract_result (result,
      96             :                                   rs,
      97             :                                   i))
      98             :     {
      99           0 :       GNUNET_break (0);
     100           0 :       ret = GNUNET_SYSERR;
     101           0 :       break;
     102             :     }
     103           2 :     ret = erc->rec (erc->rec_cls,
     104             :                     &reserve_pub,
     105             :                     &remaining_balance,
     106             :                     account_details,
     107             :                     exp_date,
     108             :                     close_request_row);
     109           2 :     GNUNET_PQ_cleanup_result (rs);
     110           2 :     if (GNUNET_OK != ret)
     111           0 :       break;
     112             :   }
     113          33 :   erc->status = ret;
     114          33 : }
     115             : 
     116             : 
     117             : enum GNUNET_DB_QueryStatus
     118          33 : TEH_PG_get_unfinished_close_requests (
     119             :   void *cls,
     120             :   TALER_EXCHANGEDB_ReserveExpiredCallback rec,
     121             :   void *rec_cls)
     122             : {
     123          33 :   struct PostgresClosure *pg = cls;
     124          33 :   struct GNUNET_PQ_QueryParam params[] = {
     125             :     GNUNET_PQ_query_param_end
     126             :   };
     127          33 :   struct CloseReserveContext ectx = {
     128             :     .rec = rec,
     129             :     .rec_cls = rec_cls,
     130             :     .pg = pg,
     131             :     .status = GNUNET_OK
     132             :   };
     133             :   enum GNUNET_DB_QueryStatus qs;
     134             : 
     135          33 :   PREPARE (pg,
     136             :            "get_unfinished_close_requests",
     137             :            "UPDATE close_requests AS rc"
     138             :            " SET done=TRUE"
     139             :            " WHERE NOT done"
     140             :            " RETURNING"
     141             :            "    reserve_pub"
     142             :            "   ,close_request_serial_id"
     143             :            "   ,close_timestamp AS expiration_date"
     144             :            "   ,close"
     145             :            "   ,(SELECT payto_uri"
     146             :            "       FROM reserves_in ri"
     147             :            "       JOIN wire_targets wt"
     148             :            "         ON (ri.wire_source_h_payto = wt.wire_target_h_payto)"
     149             :            "      WHERE ri.reserve_pub=rc.reserve_pub)"
     150             :            "    AS account_details;");
     151          33 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     152             :                                              "get_unfinished_close_requests",
     153             :                                              params,
     154             :                                              &reserve_cb,
     155             :                                              &ectx);
     156          33 :   switch (ectx.status)
     157             :   {
     158           0 :   case GNUNET_SYSERR:
     159           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     160           0 :   case GNUNET_NO:
     161           0 :     return GNUNET_DB_STATUS_SOFT_ERROR;
     162          33 :   case GNUNET_OK:
     163          33 :     break;
     164             :   }
     165          33 :   return qs;
     166             : }