merchant

Merchant backend to process payments, run by merchants
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pg_lookup_template.c (3732B)

      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 TMH_PG_lookup_template (void *cls,
     41                         const char *instance_id,
     42                         const char *template_id,
     43                         struct TALER_MERCHANTDB_TemplateDetails *td)
     44 {
     45   struct PostgresClosure *pg = cls;
     46   struct GNUNET_PQ_QueryParam params[] = {
     47     GNUNET_PQ_query_param_string (instance_id),
     48     GNUNET_PQ_query_param_string (template_id),
     49     GNUNET_PQ_query_param_end
     50   };
     51 
     52   check_connection (pg);
     53   PREPARE (pg,
     54            "lookup_template",
     55            "SELECT"
     56            " mt.template_description"
     57            ",mod.otp_id"
     58            ",mt.template_contract::TEXT"
     59            ",mt.editable_defaults::TEXT"
     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   if (NULL == td)
     68   {
     69     struct GNUNET_PQ_ResultSpec rs_null[] = {
     70       GNUNET_PQ_result_spec_end
     71     };
     72 
     73     return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     74                                                      "lookup_template",
     75                                                      params,
     76                                                      rs_null);
     77   }
     78   else
     79   {
     80     struct GNUNET_PQ_ResultSpec rs[] = {
     81       GNUNET_PQ_result_spec_string ("template_description",
     82                                     &td->template_description),
     83       GNUNET_PQ_result_spec_allow_null (
     84         GNUNET_PQ_result_spec_string ("otp_id",
     85                                       &td->otp_id),
     86         NULL),
     87       TALER_PQ_result_spec_json ("template_contract",
     88                                  &td->template_contract),
     89       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     memset (td,
     97             0,
     98             sizeof (*td));
     99     return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
    100                                                      "lookup_template",
    101                                                      params,
    102                                                      rs);
    103   }
    104 }