pg_select_accounts.c (5853B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2022, 2026 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_select_accounts.c 18 * @brief Implementation of the select_accounts function for Postgres 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_select_accounts.h" 26 #include "pg_helper.h" 27 28 29 /** 30 * Context for select_accounts(). 31 */ 32 struct SelectAccountsContext 33 { 34 /** 35 * Function to call with the results. 36 */ 37 TALER_MERCHANTDB_AccountCallback cb; 38 39 /** 40 * Closure for @e cb. 41 */ 42 void *cb_cls; 43 44 /** 45 * Database context. 46 */ 47 struct PostgresClosure *pg; 48 49 /** 50 * Set to the return value on errors. 51 */ 52 enum GNUNET_DB_QueryStatus qs; 53 54 }; 55 56 57 /** 58 * Function to be called with the results of a SELECT statement 59 * that has returned @a num_results results about accounts. 60 * 61 * @param cls of type `struct SelectAccountsContext *` 62 * @param result the postgres result 63 * @param num_results the number of results in @a result 64 */ 65 static void 66 select_account_cb (void *cls, 67 PGresult *result, 68 unsigned int num_results) 69 { 70 struct SelectAccountsContext *lic = cls; 71 72 for (unsigned int i = 0; i < num_results; i++) 73 { 74 struct TALER_FullPayto payto; 75 char *instance_id; 76 char *facade_url = NULL; 77 char *extra_wire_subject_metadata = NULL; 78 json_t *credential = NULL; 79 struct TALER_MERCHANTDB_AccountDetails acc; 80 struct TALER_MerchantPrivateKeyP merchant_priv; 81 bool no_priv; 82 struct GNUNET_PQ_ResultSpec rs[] = { 83 GNUNET_PQ_result_spec_auto_from_type ("h_wire", 84 &acc.h_wire), 85 GNUNET_PQ_result_spec_auto_from_type ("salt", 86 &acc.salt), 87 GNUNET_PQ_result_spec_string ("payto_uri", 88 &payto.full_payto), 89 GNUNET_PQ_result_spec_string ("merchant_id", 90 &instance_id), 91 GNUNET_PQ_result_spec_allow_null ( 92 GNUNET_PQ_result_spec_string ("credit_facade_url", 93 &facade_url), 94 NULL), 95 GNUNET_PQ_result_spec_allow_null ( 96 GNUNET_PQ_result_spec_string ("extra_wire_subject_metadata", 97 &extra_wire_subject_metadata), 98 NULL), 99 GNUNET_PQ_result_spec_allow_null ( 100 TALER_PQ_result_spec_json ("credit_facade_credentials", 101 &credential), 102 NULL), 103 GNUNET_PQ_result_spec_bool ("active", 104 &acc.active), 105 GNUNET_PQ_result_spec_allow_null ( 106 GNUNET_PQ_result_spec_auto_from_type ("merchant_priv", 107 &merchant_priv), 108 &no_priv), 109 GNUNET_PQ_result_spec_end 110 }; 111 112 if (GNUNET_OK != 113 GNUNET_PQ_extract_result (result, 114 rs, 115 i)) 116 { 117 GNUNET_break (0); 118 lic->qs = GNUNET_DB_STATUS_HARD_ERROR; 119 return; 120 } 121 acc.instance_id = instance_id; 122 acc.payto_uri = payto; 123 acc.credit_facade_url = facade_url; 124 acc.credit_facade_credentials = credential; 125 acc.extra_wire_subject_metadata = extra_wire_subject_metadata; 126 if (NULL != lic->cb) 127 lic->cb (lic->cb_cls, 128 no_priv ? NULL : &merchant_priv, 129 &acc); 130 GNUNET_PQ_cleanup_result (rs); 131 } 132 } 133 134 135 enum GNUNET_DB_QueryStatus 136 TMH_PG_select_accounts (void *cls, 137 const char *id, 138 TALER_MERCHANTDB_AccountCallback cb, 139 void *cb_cls) 140 { 141 struct PostgresClosure *pg = cls; 142 struct SelectAccountsContext lic = { 143 .cb = cb, 144 .cb_cls = cb_cls, 145 .pg = pg 146 }; 147 struct GNUNET_PQ_QueryParam params[] = { 148 NULL == id 149 ? GNUNET_PQ_query_param_null () 150 : GNUNET_PQ_query_param_string (id), 151 GNUNET_PQ_query_param_end 152 }; 153 enum GNUNET_DB_QueryStatus qs; 154 155 check_connection (pg); 156 PREPARE (pg, 157 "select_accounts", 158 "SELECT" 159 " ma.h_wire" 160 ",ma.salt" 161 ",ma.payto_uri" 162 ",ma.credit_facade_url" 163 ",ma.credit_facade_credentials::TEXT" 164 ",ma.extra_wire_subject_metadata" 165 ",ma.active" 166 ",mk.merchant_priv" 167 ",mi.merchant_id" 168 " FROM merchant_accounts ma" 169 " JOIN merchant_instances mi" 170 " ON (mi.merchant_serial=ma.merchant_serial)" 171 " LEFT JOIN merchant_keys mk" 172 " ON (mk.merchant_serial=ma.merchant_serial)" 173 " WHERE" 174 " ($1::TEXT IS NULL) OR" 175 " (ma.merchant_serial=" 176 " (SELECT merchant_serial " 177 " FROM merchant_instances" 178 " WHERE merchant_id=$1));"); 179 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 180 "select_accounts", 181 params, 182 &select_account_cb, 183 &lic); 184 if (0 > lic.qs) 185 return lic.qs; 186 return qs; 187 }