Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2025 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 auditordb/pg_select_early_aggregations.c
18 : * @brief Implementation of the select_early_aggregations 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_early_aggregations.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #early_aggregation_cb().
31 : */
32 : struct EarlyAggregationContext
33 : {
34 :
35 : /**
36 : * Function to call for each early aggregation.
37 : */
38 : TALER_AUDITORDB_EarlyAggregationsCallback cb;
39 :
40 : /**
41 : * Closure for @e cb
42 : */
43 : void *cb_cls;
44 :
45 : /**
46 : * Plugin context.
47 : */
48 : struct PostgresClosure *pg;
49 :
50 : /**
51 : * Query status to return.
52 : */
53 : enum GNUNET_DB_QueryStatus qs;
54 : };
55 :
56 :
57 : /**
58 : * Helper function for #TAH_PG_select_purse_expired().
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 EarlyAggregationContext *`
63 : * @param result the postgres result
64 : * @param num_results the number of results in @a result
65 : */
66 : static void
67 0 : early_aggregation_cb (void *cls,
68 : PGresult *result,
69 : unsigned int num_results)
70 : {
71 0 : struct EarlyAggregationContext *eic = cls;
72 0 : struct PostgresClosure *pg = eic->pg;
73 :
74 0 : for (unsigned int i = 0; i < num_results; i++)
75 : {
76 : struct TALER_AUDITORDB_EarlyAggregation ea;
77 0 : struct GNUNET_PQ_ResultSpec rs[] = {
78 0 : GNUNET_PQ_result_spec_uint64 ("row_id",
79 : &ea.row_id),
80 0 : GNUNET_PQ_result_spec_uint64 ("batch_deposit_serial_id",
81 : &ea.batch_deposit_serial_id),
82 0 : GNUNET_PQ_result_spec_uint64 ("tracking_serial_id",
83 : &ea.tracking_serial_id),
84 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
85 : &ea.total),
86 0 : GNUNET_PQ_result_spec_bool ("suppressed",
87 : &ea.suppressed),
88 : GNUNET_PQ_result_spec_end
89 : };
90 :
91 : /* just to be safe in case the structure changes */
92 0 : memset (&ea,
93 : 0,
94 : sizeof (ea));
95 0 : if (GNUNET_OK !=
96 0 : GNUNET_PQ_extract_result (result,
97 : rs,
98 : i))
99 : {
100 0 : GNUNET_break (0);
101 0 : eic->qs = GNUNET_DB_STATUS_HARD_ERROR;
102 0 : return;
103 : }
104 0 : eic->cb (eic->cb_cls,
105 : &ea);
106 : }
107 0 : eic->qs = num_results;
108 : }
109 :
110 :
111 : enum GNUNET_DB_QueryStatus
112 0 : TAH_PG_select_early_aggregations (
113 : void *cls,
114 : int64_t limit,
115 : uint64_t offset,
116 : bool return_suppressed,
117 : TALER_AUDITORDB_EarlyAggregationsCallback cb,
118 : void *cb_cls)
119 : {
120 0 : struct PostgresClosure *pg = cls;
121 0 : uint64_t ulimit = (limit < 0) ? -limit : limit;
122 0 : struct GNUNET_PQ_QueryParam params[] = {
123 0 : GNUNET_PQ_query_param_uint64 (&offset),
124 0 : GNUNET_PQ_query_param_uint64 (&ulimit),
125 0 : GNUNET_PQ_query_param_bool (return_suppressed),
126 : GNUNET_PQ_query_param_end
127 : };
128 0 : struct EarlyAggregationContext eic = {
129 : .cb = cb,
130 : .cb_cls = cb_cls,
131 : .pg = pg
132 : };
133 : enum GNUNET_DB_QueryStatus qs;
134 :
135 0 : PREPARE (pg,
136 : "auditor_select_early_aggregations_asc",
137 : "SELECT"
138 : " row_id"
139 : ",batch_deposit_serial_id"
140 : ",tracking_serial_id"
141 : ",amount"
142 : ",suppressed"
143 : " FROM auditor_early_aggregations"
144 : " WHERE row_id > $1"
145 : " AND ($3 OR NOT suppressed)"
146 : " ORDER BY row_id ASC"
147 : " LIMIT $2;");
148 0 : PREPARE (pg,
149 : "auditor_select_early_aggregations_desc",
150 : "SELECT"
151 : " row_id"
152 : ",batch_deposit_serial_id"
153 : ",tracking_serial_id"
154 : ",amount"
155 : ",suppressed"
156 : " FROM auditor_early_aggregations"
157 : " WHERE row_id < $1"
158 : " AND ($3 OR NOT suppressed)"
159 : " ORDER BY row_id DESC"
160 : " LIMIT $2;");
161 0 : qs = GNUNET_PQ_eval_prepared_multi_select (
162 : pg->conn,
163 : (limit < 0)
164 : ? "auditor_select_early_aggregations_desc"
165 : : "auditor_select_early_aggregations_asc ",
166 : params,
167 : &early_aggregation_cb,
168 : &eic);
169 0 : if (0 > qs)
170 0 : return qs;
171 0 : GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != eic.qs);
172 0 : return eic.qs;
173 : }
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