Line data Source code
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 pg_select_historic_denom_revenue.c
18 : * @brief Low-level (statement-level) Postgres database access for the exchange
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_historic_denom_revenue.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #historic_denom_revenue_cb().
31 : */
32 : struct HistoricDenomRevenueContext
33 : {
34 : /**
35 : * Function to call for each result.
36 : */
37 : TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb;
38 :
39 : /**
40 : * Closure for @e cb.
41 : */
42 : void *cb_cls;
43 :
44 : /**
45 : * Plugin context.
46 : */
47 : struct PostgresClosure *pg;
48 :
49 : /**
50 : * Number of results processed.
51 : */
52 : enum GNUNET_DB_QueryStatus qs;
53 : };
54 :
55 :
56 : /**
57 : * Helper function for #TAH_PG_select_historic_denom_revenue().
58 : * To be called with the results of a SELECT statement
59 : * that has returned @a num_results results.
60 : *
61 : * @param cls closure of type `struct HistoricRevenueContext *`
62 : * @param result the postgres result
63 : * @param num_results the number of results in @a result
64 : */
65 : static void
66 1 : historic_denom_revenue_cb (void *cls,
67 : PGresult *result,
68 : unsigned int num_results)
69 : {
70 1 : struct HistoricDenomRevenueContext *hrc = cls;
71 1 : struct PostgresClosure *pg = hrc->pg;
72 :
73 3 : for (unsigned int i = 0; i < num_results; i++)
74 : {
75 : uint64_t rowid;
76 : struct TALER_DenominationHashP denom_pub_hash;
77 : struct GNUNET_TIME_Timestamp revenue_timestamp;
78 : struct TALER_Amount revenue_balance;
79 : struct TALER_Amount loss;
80 2 : struct GNUNET_PQ_ResultSpec rs[] = {
81 2 : GNUNET_PQ_result_spec_uint64 ("row_id",
82 : &rowid),
83 2 : GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
84 : &denom_pub_hash),
85 2 : GNUNET_PQ_result_spec_timestamp ("revenue_timestamp",
86 : &revenue_timestamp),
87 2 : TALER_PQ_RESULT_SPEC_AMOUNT ("revenue_balance",
88 : &revenue_balance),
89 2 : TALER_PQ_RESULT_SPEC_AMOUNT ("loss_balance",
90 : &loss),
91 : GNUNET_PQ_result_spec_end
92 : };
93 :
94 2 : if (GNUNET_OK !=
95 2 : GNUNET_PQ_extract_result (result,
96 : rs,
97 : i))
98 : {
99 0 : GNUNET_break (0);
100 0 : hrc->qs = GNUNET_DB_STATUS_HARD_ERROR;
101 0 : return;
102 : }
103 :
104 2 : hrc->qs = i + 1;
105 2 : if (GNUNET_OK !=
106 2 : hrc->cb (hrc->cb_cls,
107 : rowid,
108 : &denom_pub_hash,
109 : revenue_timestamp,
110 : &revenue_balance,
111 : &loss))
112 0 : break;
113 : }
114 : }
115 :
116 :
117 : enum GNUNET_DB_QueryStatus
118 1 : TAH_PG_select_historic_denom_revenue (
119 : void *cls,
120 : int64_t limit,
121 : uint64_t offset,
122 : TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb,
123 : void *cb_cls)
124 : {
125 1 : struct PostgresClosure *pg = cls;
126 1 : uint64_t ulimit = (limit > 0) ? limit : -limit;
127 1 : struct GNUNET_PQ_QueryParam params[] = {
128 1 : GNUNET_PQ_query_param_uint64 (&offset),
129 1 : GNUNET_PQ_query_param_uint64 (&ulimit),
130 : GNUNET_PQ_query_param_end
131 : };
132 1 : struct HistoricDenomRevenueContext hrc = {
133 : .cb = cb,
134 : .cb_cls = cb_cls,
135 : .pg = pg
136 : };
137 : enum GNUNET_DB_QueryStatus qs;
138 :
139 1 : PREPARE (pg,
140 : "auditor_historic_denomination_revenue_select_inc",
141 : "SELECT"
142 : " row_id"
143 : ",denom_pub_hash"
144 : ",revenue_timestamp"
145 : ",revenue_balance"
146 : ",loss_balance"
147 : " FROM auditor_historic_denomination_revenue"
148 : " WHERE row_id > $1"
149 : " ORDER BY row_id ASC"
150 : " LIMIT $2;");
151 1 : PREPARE (pg,
152 : "auditor_historic_denomination_revenue_select_dec",
153 : "SELECT"
154 : " row_id"
155 : ",denom_pub_hash"
156 : ",revenue_timestamp"
157 : ",revenue_balance"
158 : ",loss_balance"
159 : " FROM auditor_historic_denomination_revenue"
160 : " WHERE row_id < $1"
161 : " ORDER BY row_id DESC"
162 : " LIMIT $2;");
163 1 : qs = GNUNET_PQ_eval_prepared_multi_select (
164 : pg->conn,
165 : limit > 0
166 : ? "auditor_historic_denomination_revenue_select_inc"
167 : : "auditor_historic_denomination_revenue_select_dec",
168 : params,
169 : &historic_denom_revenue_cb,
170 : &hrc);
171 1 : if (qs <= 0)
172 0 : return qs;
173 1 : return hrc.qs;
174 : }
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