pg_select_accounts.c (5489B)
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 backenddb/pg_select_accounts.c 18 * @brief Implementation of the select_accounts 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_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 json_t *credential = NULL; 78 struct TALER_MERCHANTDB_AccountDetails acc; 79 struct TALER_MerchantPrivateKeyP merchant_priv; 80 bool no_priv; 81 struct GNUNET_PQ_ResultSpec rs[] = { 82 GNUNET_PQ_result_spec_auto_from_type ("h_wire", 83 &acc.h_wire), 84 GNUNET_PQ_result_spec_auto_from_type ("salt", 85 &acc.salt), 86 GNUNET_PQ_result_spec_string ("payto_uri", 87 &payto.full_payto), 88 GNUNET_PQ_result_spec_string ("merchant_id", 89 &instance_id), 90 GNUNET_PQ_result_spec_allow_null ( 91 GNUNET_PQ_result_spec_string ("credit_facade_url", 92 &facade_url), 93 NULL), 94 GNUNET_PQ_result_spec_allow_null ( 95 TALER_PQ_result_spec_json ("credit_facade_credentials", 96 &credential), 97 NULL), 98 GNUNET_PQ_result_spec_bool ("active", 99 &acc.active), 100 GNUNET_PQ_result_spec_allow_null ( 101 GNUNET_PQ_result_spec_auto_from_type ("merchant_priv", 102 &merchant_priv), 103 &no_priv), 104 GNUNET_PQ_result_spec_end 105 }; 106 107 if (GNUNET_OK != 108 GNUNET_PQ_extract_result (result, 109 rs, 110 i)) 111 { 112 GNUNET_break (0); 113 lic->qs = GNUNET_DB_STATUS_HARD_ERROR; 114 return; 115 } 116 acc.instance_id = instance_id; 117 acc.payto_uri = payto; 118 acc.credit_facade_url = facade_url; 119 acc.credit_facade_credentials = credential; 120 if (NULL != lic->cb) 121 lic->cb (lic->cb_cls, 122 no_priv ? NULL : &merchant_priv, 123 &acc); 124 GNUNET_PQ_cleanup_result (rs); 125 } 126 } 127 128 129 enum GNUNET_DB_QueryStatus 130 TMH_PG_select_accounts (void *cls, 131 const char *id, 132 TALER_MERCHANTDB_AccountCallback cb, 133 void *cb_cls) 134 { 135 struct PostgresClosure *pg = cls; 136 struct SelectAccountsContext lic = { 137 .cb = cb, 138 .cb_cls = cb_cls, 139 .pg = pg 140 }; 141 struct GNUNET_PQ_QueryParam params[] = { 142 NULL == id 143 ? GNUNET_PQ_query_param_null () 144 : GNUNET_PQ_query_param_string (id), 145 GNUNET_PQ_query_param_end 146 }; 147 enum GNUNET_DB_QueryStatus qs; 148 149 check_connection (pg); 150 PREPARE (pg, 151 "select_accounts", 152 "SELECT" 153 " ma.h_wire" 154 ",ma.salt" 155 ",ma.payto_uri" 156 ",ma.credit_facade_url" 157 ",ma.credit_facade_credentials::TEXT" 158 ",ma.active" 159 ",mk.merchant_priv" 160 ",mi.merchant_id" 161 " FROM merchant_accounts ma" 162 " JOIN merchant_instances mi" 163 " ON (mi.merchant_serial=ma.merchant_serial)" 164 " LEFT JOIN merchant_keys mk" 165 " ON (mk.merchant_serial=ma.merchant_serial)" 166 " WHERE" 167 " ($1::TEXT IS NULL) OR" 168 " (ma.merchant_serial=" 169 " (SELECT merchant_serial " 170 " FROM merchant_instances" 171 " WHERE merchant_id=$1));"); 172 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 173 "select_accounts", 174 params, 175 &select_account_cb, 176 &lic); 177 if (0 > lic.qs) 178 return lic.qs; 179 return qs; 180 }