pg_lookup_transfers.c (7507B)
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_transfers.c 18 * @brief Implementation of the lookup_transfers 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_transfers.h" 26 #include "pg_helper.h" 27 28 29 /** 30 * Closure for #lookup_transfers_cb(). 31 */ 32 struct LookupTransfersContext 33 { 34 /** 35 * Function to call on results. 36 */ 37 TALER_MERCHANTDB_TransferCallback cb; 38 39 /** 40 * Closure for @e cb. 41 */ 42 void *cb_cls; 43 44 /** 45 * Postgres context. 46 */ 47 struct PostgresClosure *pg; 48 49 /** 50 * Transaction status (set). 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. 60 * 61 * @param cls of type `struct LookupTransfersContext *` 62 * @param result the postgres result 63 * @param num_results the number of results in @a result 64 */ 65 static void 66 lookup_transfers_cb (void *cls, 67 PGresult *result, 68 unsigned int num_results) 69 { 70 struct LookupTransfersContext *ltc = cls; 71 72 for (unsigned int i = 0; i<num_results; i++) 73 { 74 struct TALER_Amount credit_amount; 75 struct TALER_WireTransferIdentifierRawP wtid; 76 struct TALER_FullPayto payto_uri; 77 char *exchange_url; 78 uint64_t transfer_serial_id; 79 struct GNUNET_TIME_Absolute execution_time; 80 bool expected; 81 struct GNUNET_PQ_ResultSpec rs[] = { 82 TALER_PQ_result_spec_amount_with_currency ("credit_amount", 83 &credit_amount), 84 GNUNET_PQ_result_spec_auto_from_type ("wtid", 85 &wtid), 86 GNUNET_PQ_result_spec_string ("payto_uri", 87 &payto_uri.full_payto), 88 GNUNET_PQ_result_spec_string ("exchange_url", 89 &exchange_url), 90 GNUNET_PQ_result_spec_uint64 ("credit_serial", 91 &transfer_serial_id), 92 GNUNET_PQ_result_spec_absolute_time ("execution_time", 93 &execution_time), 94 GNUNET_PQ_result_spec_bool ("expected", 95 &expected), 96 GNUNET_PQ_result_spec_end 97 }; 98 99 if (GNUNET_OK != 100 GNUNET_PQ_extract_result (result, 101 rs, 102 i)) 103 { 104 GNUNET_break (0); 105 ltc->qs = GNUNET_DB_STATUS_HARD_ERROR; 106 return; 107 } 108 ltc->cb (ltc->cb_cls, 109 &credit_amount, 110 &wtid, 111 payto_uri, 112 exchange_url, 113 transfer_serial_id, 114 execution_time, 115 expected); 116 GNUNET_PQ_cleanup_result (rs); 117 } 118 ltc->qs = num_results; 119 } 120 121 122 enum GNUNET_DB_QueryStatus 123 TMH_PG_lookup_transfers (void *cls, 124 const char *instance_id, 125 struct TALER_FullPayto payto_uri, 126 struct GNUNET_TIME_Timestamp before, 127 struct GNUNET_TIME_Timestamp after, 128 int64_t limit, 129 uint64_t offset, 130 enum TALER_EXCHANGE_YesNoAll expected, 131 TALER_MERCHANTDB_TransferCallback cb, 132 void *cb_cls) 133 { 134 struct PostgresClosure *pg = cls; 135 uint64_t plimit = (uint64_t) ((limit < 0) ? -limit : limit); 136 bool by_time = ( (! GNUNET_TIME_absolute_is_never (before.abs_time)) || 137 (! GNUNET_TIME_absolute_is_zero (after.abs_time)) ); 138 struct LookupTransfersContext ltc = { 139 .cb = cb, 140 .cb_cls = cb_cls, 141 .pg = pg 142 }; 143 struct GNUNET_PQ_QueryParam params[] = { 144 GNUNET_PQ_query_param_string (instance_id), 145 GNUNET_PQ_query_param_timestamp (&before), 146 GNUNET_PQ_query_param_timestamp (&after), 147 GNUNET_PQ_query_param_uint64 (&offset), 148 GNUNET_PQ_query_param_uint64 (&plimit), 149 NULL == payto_uri.full_payto 150 ? GNUNET_PQ_query_param_null () /* NULL: do not filter by payto URI */ 151 : GNUNET_PQ_query_param_string (payto_uri.full_payto), 152 GNUNET_PQ_query_param_bool (! by_time), /* $7: filter by time? */ 153 GNUNET_PQ_query_param_bool (TALER_EXCHANGE_YNA_ALL == expected), /* filter by expected? */ 154 GNUNET_PQ_query_param_bool (TALER_EXCHANGE_YNA_YES == expected), 155 156 GNUNET_PQ_query_param_end 157 }; 158 enum GNUNET_DB_QueryStatus qs; 159 160 check_connection (pg); 161 PREPARE (pg, 162 "lookup_transfers_asc", 163 "SELECT" 164 " mt.credit_amount" 165 ",mt.wtid" 166 ",mac.payto_uri" 167 ",mt.exchange_url" 168 ",mt.credit_serial" 169 ",mt.execution_time" 170 ",mt.expected" 171 " FROM merchant_transfers mt" 172 " JOIN merchant_accounts mac" 173 " USING (account_serial)" 174 " WHERE ( $7 OR " 175 " (mt.execution_time < $2 AND" 176 " mt.execution_time >= $3) )" 177 " AND ( (CAST($6 AS TEXT) IS NULL) OR " 178 " (REGEXP_REPLACE(mac.payto_uri,'\\?.*','')" 179 " =REGEXP_REPLACE($6,'\\?.*','')) )" 180 " AND ( $8 OR " 181 " (mt.expected = $9) )" 182 " AND merchant_serial =" 183 " (SELECT merchant_serial" 184 " FROM merchant_instances" 185 " WHERE merchant_id=$1)" 186 " AND (mt.credit_serial > $4)" 187 " ORDER BY mt.credit_serial ASC" 188 " LIMIT $5"); 189 PREPARE (pg, 190 "lookup_transfers_desc", 191 "SELECT" 192 " mt.credit_amount" 193 ",mt.wtid" 194 ",mac.payto_uri" 195 ",mt.exchange_url" 196 ",mt.credit_serial" 197 ",mt.execution_time" 198 ",mt.expected" 199 " FROM merchant_transfers mt" 200 " JOIN merchant_accounts mac" 201 " USING (account_serial)" 202 " WHERE ( $7 OR " 203 " (mt.execution_time < $2 AND" 204 " mt.execution_time >= $3) )" 205 " AND ( (CAST($6 AS TEXT) IS NULL) OR " 206 " (REGEXP_REPLACE(mac.payto_uri,'\\?.*','')" 207 " =REGEXP_REPLACE($6,'\\?.*','')) )" 208 " AND ( $8 OR " 209 " (mt.expected = $9) )" 210 " AND merchant_serial =" 211 " (SELECT merchant_serial" 212 " FROM merchant_instances" 213 " WHERE merchant_id=$1)" 214 " AND (mt.credit_serial < $4)" 215 " ORDER BY mt.credit_serial DESC" 216 " LIMIT $5"); 217 qs = GNUNET_PQ_eval_prepared_multi_select ( 218 pg->conn, 219 (limit > 0) 220 ? "lookup_transfers_asc" 221 : "lookup_transfers_desc", 222 params, 223 &lookup_transfers_cb, 224 <c); 225 if (0 >= qs) 226 return qs; 227 return ltc.qs; 228 }