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 exchangedb/get_exists_aml_officer.c
      18              :  * @brief Implementation of the get_exists_aml_officer function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/get_exists_aml_officer.h"
      23              : #include "helper.h"
      24              : 
      25              : 
      26              : enum GNUNET_DB_QueryStatus
      27           15 : TALER_EXCHANGEDB_get_exists_aml_officer (
      28              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
      29              :   const struct TALER_AmlOfficerPublicKeyP *decider_pub,
      30              :   bool *read_only)
      31              : {
      32           15 :   struct GNUNET_PQ_QueryParam params[] = {
      33           15 :     GNUNET_PQ_query_param_auto_from_type (decider_pub),
      34              :     GNUNET_PQ_query_param_end
      35              :   };
      36           15 :   struct GNUNET_PQ_ResultSpec rs[] = {
      37           15 :     GNUNET_PQ_result_spec_bool ("read_only",
      38              :                                 read_only),
      39              :     GNUNET_PQ_result_spec_end
      40              :   };
      41              : 
      42              :   /* aml_staff is append-only, so the officer's status is the row with the
      43              :      greatest last_change.  The is_active filter has to be applied to that
      44              :      row and only to it: filtering first would let any active status the
      45              :      officer ever held answer for one that has since been revoked. */
      46           15 :   PREPARE (pg,
      47              :            "get_exists_aml_officer",
      48              :            "SELECT read_only"
      49              :            "  FROM (SELECT is_active"
      50              :            "              ,read_only"
      51              :            "          FROM aml_staff"
      52              :            "         WHERE decider_pub=$1"
      53              :            "         ORDER BY last_change DESC"
      54              :            "         LIMIT 1) latest"
      55              :            " WHERE is_active;");
      56           15 :   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
      57              :                                                    "get_exists_aml_officer",
      58              :                                                    params,
      59              :                                                    rs);
      60              : }