lookup_template.c (3946B)
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 src/backenddb/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 "merchant-database/lookup_template.h" 26 #include "helper.h" 27 28 29 /** 30 * Lookup details about a particular template. 31 * 32 * @param pg database context 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 TALER_MERCHANTDB_lookup_template (struct TALER_MERCHANTDB_PostgresContext *pg, 41 const char *instance_id, 42 const char *template_id, 43 struct TALER_MERCHANTDB_TemplateDetails *td) 44 { 45 struct GNUNET_PQ_QueryParam params[] = { 46 GNUNET_PQ_query_param_string (instance_id), 47 GNUNET_PQ_query_param_string (template_id), 48 GNUNET_PQ_query_param_end 49 }; 50 enum GNUNET_DB_QueryStatus qs; 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 qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn, 74 "lookup_template", 75 params, 76 rs_null); 77 GNUNET_PQ_cleanup_query_params_closures (params); 78 return qs; 79 } 80 else 81 { 82 struct GNUNET_PQ_ResultSpec rs[] = { 83 GNUNET_PQ_result_spec_string ("template_description", 84 &td->template_description), 85 GNUNET_PQ_result_spec_allow_null ( 86 GNUNET_PQ_result_spec_string ("otp_id", 87 &td->otp_id), 88 NULL), 89 TALER_PQ_result_spec_json ("template_contract", 90 &td->template_contract), 91 GNUNET_PQ_result_spec_allow_null ( 92 TALER_PQ_result_spec_json ("editable_defaults", 93 &td->editable_defaults), 94 NULL), 95 GNUNET_PQ_result_spec_end 96 }; 97 98 memset (td, 99 0, 100 sizeof (*td)); 101 qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn, 102 "lookup_template", 103 params, 104 rs); 105 GNUNET_PQ_cleanup_query_params_closures (params); 106 return qs; 107 } 108 }