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 backenddb/pg_lookup_template.c
      18             :  * @brief Implementation of the lookup_template 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_lookup_template.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Lookup details about a particular template.
      31             :  *
      32             :  * @param cls closure
      33             :  * @param instance_id instance to lookup template for
      34             :  * @param template_id template to lookup
      35             :  * @param[out] td set to the template details on success, can be NULL
      36             :  *             (in that case we only want to check if the template exists)
      37             :  * @return database result code
      38             :  */
      39             : enum GNUNET_DB_QueryStatus
      40          26 : TMH_PG_lookup_template (void *cls,
      41             :                         const char *instance_id,
      42             :                         const char *template_id,
      43             :                         struct TALER_MERCHANTDB_TemplateDetails *td)
      44             : {
      45          26 :   struct PostgresClosure *pg = cls;
      46          26 :   struct GNUNET_PQ_QueryParam params[] = {
      47          26 :     GNUNET_PQ_query_param_string (instance_id),
      48          26 :     GNUNET_PQ_query_param_string (template_id),
      49             :     GNUNET_PQ_query_param_end
      50             :   };
      51             : 
      52          26 :   check_connection (pg);
      53          26 :   PREPARE (pg,
      54             :            "lookup_template",
      55             :            "SELECT"
      56             :            " mt.template_description"
      57             :            ",mod.otp_id"
      58             :            ",mt.template_contract"
      59             :            ",mt.editable_defaults"
      60             :            " FROM merchant_template mt"
      61             :            " JOIN merchant_instances mi"
      62             :            "   ON (mi.merchant_serial = mt.merchant_serial)"
      63             :            " LEFT JOIN merchant_otp_devices mod"
      64             :            "   ON (mod.otp_serial = mt.otp_device_id)"
      65             :            " WHERE mi.merchant_id=$1"
      66             :            "   AND mt.template_id=$2");
      67          26 :   if (NULL == td)
      68             :   {
      69           0 :     struct GNUNET_PQ_ResultSpec rs_null[] = {
      70             :       GNUNET_PQ_result_spec_end
      71             :     };
      72             : 
      73           0 :     return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
      74             :                                                      "lookup_template",
      75             :                                                      params,
      76             :                                                      rs_null);
      77             :   }
      78             :   else
      79             :   {
      80          26 :     struct GNUNET_PQ_ResultSpec rs[] = {
      81          26 :       GNUNET_PQ_result_spec_string ("template_description",
      82             :                                     &td->template_description),
      83          26 :       GNUNET_PQ_result_spec_allow_null (
      84             :         GNUNET_PQ_result_spec_string ("otp_id",
      85             :                                       &td->otp_id),
      86             :         NULL),
      87          26 :       TALER_PQ_result_spec_json ("template_contract",
      88             :                                  &td->template_contract),
      89          26 :       GNUNET_PQ_result_spec_allow_null (
      90             :         TALER_PQ_result_spec_json ("editable_defaults",
      91             :                                    &td->editable_defaults),
      92             :         NULL),
      93             :       GNUNET_PQ_result_spec_end
      94             :     };
      95             : 
      96          26 :     memset (td,
      97             :             0,
      98             :             sizeof (*td));
      99          26 :     return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     100             :                                                      "lookup_template",
     101             :                                                      params,
     102             :                                                      rs);
     103             :   }
     104             : }