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_reserve_revenue.c
18 : * @brief Low-level (statement-level) Postgres database access for the exchange
19 : * @author Christian Grothoff
20 : */
21 : #include "platform.h"
22 : #include "taler_error_codes.h"
23 : #include "taler_dbevents.h"
24 : #include "taler_pq_lib.h"
25 : #include "pg_select_historic_reserve_revenue.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #historic_reserve_revenue_cb().
31 : */
32 : struct HistoricReserveRevenueContext
33 : {
34 : /**
35 : * Function to call for each result.
36 : */
37 : TALER_AUDITORDB_HistoricReserveRevenueDataCallback 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_reserve_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_reserve_revenue_cb (void *cls,
67 : PGresult *result,
68 : unsigned int num_results)
69 : {
70 1 : struct HistoricReserveRevenueContext *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 GNUNET_TIME_Timestamp start_date;
77 : struct GNUNET_TIME_Timestamp end_date;
78 : struct TALER_Amount reserve_profits;
79 2 : struct GNUNET_PQ_ResultSpec rs[] = {
80 2 : GNUNET_PQ_result_spec_uint64 ("row_id",
81 : &rowid),
82 2 : GNUNET_PQ_result_spec_timestamp ("start_date",
83 : &start_date),
84 2 : GNUNET_PQ_result_spec_timestamp ("end_date",
85 : &end_date),
86 2 : TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_profits",
87 : &reserve_profits),
88 : GNUNET_PQ_result_spec_end
89 : };
90 :
91 2 : if (GNUNET_OK !=
92 2 : GNUNET_PQ_extract_result (result,
93 : rs,
94 : i))
95 : {
96 0 : GNUNET_break (0);
97 0 : hrc->qs = GNUNET_DB_STATUS_HARD_ERROR;
98 0 : return;
99 : }
100 2 : hrc->qs = i + 1;
101 2 : if (GNUNET_OK !=
102 2 : hrc->cb (hrc->cb_cls,
103 : rowid,
104 : start_date,
105 : end_date,
106 : &reserve_profits))
107 0 : break;
108 : }
109 : }
110 :
111 :
112 : enum GNUNET_DB_QueryStatus
113 1 : TAH_PG_select_historic_reserve_revenue (
114 : void *cls,
115 : int64_t limit,
116 : uint64_t offset,
117 : TALER_AUDITORDB_HistoricReserveRevenueDataCallback cb,
118 : void *cb_cls)
119 : {
120 1 : struct PostgresClosure *pg = cls;
121 1 : uint64_t ulimit = (limit > 0) ? limit : -limit;
122 1 : struct GNUNET_PQ_QueryParam params[] = {
123 1 : GNUNET_PQ_query_param_uint64 (&offset),
124 1 : GNUNET_PQ_query_param_uint64 (&ulimit),
125 : GNUNET_PQ_query_param_end
126 : };
127 : enum GNUNET_DB_QueryStatus qs;
128 1 : struct HistoricReserveRevenueContext hrc = {
129 : .cb = cb,
130 : .cb_cls = cb_cls,
131 : .pg = pg
132 : };
133 :
134 1 : PREPARE (pg,
135 : "auditor_historic_reserve_summary_select_inc",
136 : "SELECT"
137 : " row_id"
138 : ",start_date"
139 : ",end_date"
140 : ",reserve_profits"
141 : " FROM auditor_historic_reserve_summary"
142 : " WHERE row_id > $1"
143 : " ORDER BY row_id ASC"
144 : " LIMIT $2");
145 1 : PREPARE (pg,
146 : "auditor_historic_reserve_summary_select_dec",
147 : "SELECT"
148 : " row_id"
149 : ",start_date"
150 : ",end_date"
151 : ",reserve_profits"
152 : " FROM auditor_historic_reserve_summary"
153 : " WHERE row_id < $1"
154 : " ORDER BY row_id DESC"
155 : " LIMIT $2");
156 1 : qs = GNUNET_PQ_eval_prepared_multi_select (
157 : pg->conn,
158 : limit > 0
159 : ? "auditor_historic_reserve_summary_select_inc"
160 : : "auditor_historic_reserve_summary_select_dec",
161 : params,
162 : &historic_reserve_revenue_cb,
163 : &hrc);
164 1 : if (0 >= qs)
165 0 : return qs;
166 1 : return hrc.qs;
167 : }
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