iterate_emergencies_by_count.c (5963B)
1 /* 2 This file is part of TALER 3 Copyright (C) 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 #include "taler/taler_error_codes.h" 17 #include "taler/taler_pq_lib.h" 18 #include "pg_helper.h" 19 #include "auditor-database/iterate_emergencies_by_count.h" 20 21 22 /** 23 * Hard upper bound on the number of records returned by a single 24 * call, regardless of the limit requested by the client. 25 */ 26 #define MAX_RECORDS 50000 27 28 29 /** 30 * Closure for #emergency_cb(). 31 */ 32 struct EmergencyByCountContext 33 { 34 35 /** 36 * Function to call for each deposit confirmation. 37 */ 38 TALER_AUDITORDB_EmergenciesByCountCallback cb; 39 40 /** 41 * Closure for @e cb 42 */ 43 void *cb_cls; 44 45 /** 46 * Plugin context. 47 */ 48 struct TALER_AUDITORDB_PostgresContext *pg; 49 50 /** 51 * Query status to return. 52 */ 53 enum GNUNET_DB_QueryStatus qs; 54 }; 55 56 57 /** 58 * Helper function for #TALER_AUDITORDB_iterate_emergencies_by_count(). 59 * To be called with the results of a SELECT statement 60 * that has returned @a num_results results. 61 * 62 * @param cls closure of type `struct Emergency *` 63 * @param result the postgres result 64 * @param num_results the number of results in @a result 65 */ 66 static void 67 emergency_by_count_cb (void *cls, 68 PGresult *result, 69 unsigned int num_results) 70 { 71 struct EmergencyByCountContext *dcc = cls; 72 struct TALER_AUDITORDB_PostgresContext *pg = dcc->pg; 73 74 for (unsigned int i = 0; i < num_results; i++) 75 { 76 struct TALER_AUDITORDB_EmergenciesByCount dc; 77 struct GNUNET_PQ_ResultSpec rs[] = { 78 GNUNET_PQ_result_spec_uint64 ("row_id", 79 &dc.row_id), 80 GNUNET_PQ_result_spec_auto_from_type ("denompub_h", 81 &dc.denompub_h), 82 GNUNET_PQ_result_spec_uint64 ("num_issued", 83 &dc.num_issued), 84 GNUNET_PQ_result_spec_uint64 ("num_known", 85 &dc.num_known), 86 TALER_PQ_RESULT_SPEC_AMOUNT ("risk", 87 &dc.risk), 88 GNUNET_PQ_result_spec_absolute_time ("start", 89 &dc.start), 90 GNUNET_PQ_result_spec_absolute_time ("deposit_end", 91 &dc.deposit_end), 92 TALER_PQ_RESULT_SPEC_AMOUNT ("value", 93 &dc.value), 94 GNUNET_PQ_result_spec_bool ("suppressed", 95 &dc.suppressed), 96 GNUNET_PQ_result_spec_end 97 }; 98 enum GNUNET_GenericReturnValue rval; 99 100 if (GNUNET_OK != 101 GNUNET_PQ_extract_result (result, 102 rs, 103 i)) 104 { 105 GNUNET_break (0); 106 dcc->qs = GNUNET_DB_STATUS_HARD_ERROR; 107 return; 108 } 109 dcc->qs = i + 1; 110 rval = dcc->cb (dcc->cb_cls, 111 &dc); 112 GNUNET_PQ_cleanup_result (rs); 113 if (GNUNET_OK != rval) 114 break; 115 } 116 } 117 118 119 enum GNUNET_DB_QueryStatus 120 TALER_AUDITORDB_iterate_emergencies_by_count (struct 121 TALER_AUDITORDB_PostgresContext * 122 pg, 123 int64_t limit, 124 uint64_t offset, 125 bool return_suppressed, 126 TALER_AUDITORDB_EmergenciesByCountCallback 127 cb, 128 void *cb_cls) 129 { 130 uint64_t plimit = GNUNET_MIN ((uint64_t) MAX_RECORDS, 131 TALER_AUDITORDB_abs_limit (limit)); 132 struct GNUNET_PQ_QueryParam params[] = { 133 GNUNET_PQ_query_param_uint64 (&offset), 134 GNUNET_PQ_query_param_bool (return_suppressed), 135 GNUNET_PQ_query_param_uint64 (&plimit), 136 GNUNET_PQ_query_param_end 137 }; 138 struct EmergencyByCountContext dcc = { 139 .cb = cb, 140 .cb_cls = cb_cls, 141 .pg = pg 142 }; 143 enum GNUNET_DB_QueryStatus qs; 144 145 PREPARE (pg, 146 "iterate_emergencies_by_count_emergency_by_count_get_desc", 147 "SELECT" 148 " row_id" 149 ",denompub_h" 150 ",num_issued" 151 ",num_known" 152 ",risk" 153 ",start" 154 ",deposit_end" 155 ",value" 156 ",suppressed" 157 " FROM auditor_emergency_by_count" 158 " WHERE (row_id < $1)" 159 " AND ($2 OR NOT suppressed)" 160 " ORDER BY row_id DESC" 161 " LIMIT $3" 162 ); 163 PREPARE (pg, 164 "iterate_emergencies_by_count_emergency_by_count_get_asc", 165 "SELECT" 166 " row_id" 167 ",denompub_h" 168 ",num_issued" 169 ",num_known" 170 ",risk" 171 ",start" 172 ",deposit_end" 173 ",value" 174 ",suppressed" 175 " FROM auditor_emergency_by_count" 176 " WHERE (row_id > $1)" 177 " AND ($2 OR NOT suppressed)" 178 " ORDER BY row_id ASC" 179 " LIMIT $3" 180 ); 181 qs = GNUNET_PQ_eval_prepared_multi_select ( 182 pg->conn, 183 (limit > 0) 184 ? "iterate_emergencies_by_count_emergency_by_count_get_asc" 185 : "iterate_emergencies_by_count_emergency_by_count_get_desc", 186 params, 187 &emergency_by_count_cb, 188 &dcc); 189 if (qs > 0) 190 return dcc.qs; 191 GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs); 192 return qs; 193 }