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 src/backenddb/iterate_statistic_interval_counters.c
18 : * @brief Implementation of the iterate_statistic_interval_counters function for Postgres
19 : * @author Martin Schanzenbach
20 : */
21 : #include "platform.h"
22 : #include <taler/taler_pq_lib.h>
23 : #include "merchant-database/iterate_statistic_interval_counters.h"
24 : #include "helper.h"
25 : #include "merchantdb_lib.h"
26 :
27 :
28 : /**
29 : * Context used for TALER_MERCHANTDB_iterate_statistic_interval_counters().
30 : */
31 : struct LookupCounterStatisticsContext
32 : {
33 : /**
34 : * Function to call with the results.
35 : */
36 : TALER_MERCHANTDB_CounterByIntervalStatisticsCallback cb;
37 :
38 : /**
39 : * Closure for @a cb.
40 : */
41 : void *cb_cls;
42 :
43 : /**
44 : * Did database result extraction fail?
45 : */
46 : bool extract_failed;
47 :
48 : /**
49 : * Description of statistic
50 : */
51 : char*description;
52 : };
53 :
54 : /**
55 : * Function to be called with the results of a SELECT statement
56 : * that has returned @a num_results results about statistics.
57 : *
58 : * @param[in,out] cls of type `struct LookupTokenFamiliesContext *`
59 : * @param result the postgres result
60 : * @param num_results the number of results in @a result
61 : */
62 : static void
63 4 : lookup_statistics_counter_by_interval_desc_cb (void *cls,
64 : PGresult *result,
65 : unsigned int num_results)
66 : {
67 4 : struct LookupCounterStatisticsContext *tflc = cls;
68 :
69 8 : for (unsigned int i = 0; i < num_results; i++)
70 : {
71 : char *description;
72 4 : struct GNUNET_PQ_ResultSpec rs[] = {
73 4 : GNUNET_PQ_result_spec_string ("description",
74 : &description),
75 : GNUNET_PQ_result_spec_end
76 : };
77 :
78 4 : if (GNUNET_OK !=
79 4 : GNUNET_PQ_extract_result (result,
80 : rs,
81 : i))
82 : {
83 0 : GNUNET_break (0);
84 0 : tflc->extract_failed = true;
85 0 : return;
86 : }
87 :
88 4 : tflc->description = GNUNET_strdup (description);
89 :
90 4 : GNUNET_PQ_cleanup_result (rs);
91 : }
92 : }
93 :
94 :
95 : /**
96 : * Function to be called with the results of a SELECT statement
97 : * that has returned @a num_results results about statistics.
98 : *
99 : * @param[in,out] cls of type `struct LookupTokenFamiliesContext *`
100 : * @param result the postgres result
101 : * @param num_results the number of results in @a result
102 : */
103 : static void
104 4 : lookup_statistics_counter_by_interval_cb (
105 : void *cls,
106 : PGresult *result,
107 : unsigned int num_results)
108 : {
109 4 : struct LookupCounterStatisticsContext *tflc = cls;
110 :
111 10 : for (unsigned int i = 0; i < num_results; i++)
112 : {
113 : uint64_t cumulative_number;
114 : uint64_t interval_start_ago;
115 6 : struct GNUNET_PQ_ResultSpec rs[] = {
116 6 : GNUNET_PQ_result_spec_uint64 ("range",
117 : &interval_start_ago),
118 6 : GNUNET_PQ_result_spec_uint64 ("rvalue",
119 : &cumulative_number),
120 : GNUNET_PQ_result_spec_end
121 : };
122 : struct GNUNET_TIME_Timestamp interval_start;
123 :
124 6 : if (GNUNET_OK !=
125 6 : GNUNET_PQ_extract_result (result,
126 : rs,
127 : i))
128 : {
129 0 : GNUNET_break (0);
130 0 : tflc->extract_failed = true;
131 0 : return;
132 : }
133 :
134 6 : interval_start = GNUNET_TIME_timestamp_get ();
135 6 : interval_start.abs_time.abs_value_us -= interval_start_ago * 1000 * 1000;
136 6 : tflc->cb (tflc->cb_cls,
137 6 : tflc->description,
138 : interval_start,
139 : cumulative_number);
140 6 : GNUNET_PQ_cleanup_result (rs);
141 : }
142 : }
143 :
144 :
145 : enum GNUNET_DB_QueryStatus
146 4 : TALER_MERCHANTDB_iterate_statistic_interval_counters (
147 : struct TALER_MERCHANTDB_PostgresContext *pg,
148 : const char *instance_id,
149 : const char *slug,
150 : TALER_MERCHANTDB_CounterByIntervalStatisticsCallback cb,
151 : void *cb_cls)
152 : {
153 4 : struct LookupCounterStatisticsContext context = {
154 : .cb = cb,
155 : .cb_cls = cb_cls,
156 : /* Can be overwritten by the lookup_statistics_counter_by_interval_cb */
157 : .extract_failed = false,
158 : .description = NULL
159 : };
160 4 : struct GNUNET_PQ_QueryParam descParams[] = {
161 4 : GNUNET_PQ_query_param_string (slug),
162 : GNUNET_PQ_query_param_end
163 : };
164 4 : struct GNUNET_PQ_QueryParam params[] = {
165 4 : GNUNET_PQ_query_param_string (slug),
166 : GNUNET_PQ_query_param_end
167 : };
168 : enum GNUNET_DB_QueryStatus qs;
169 :
170 4 : GNUNET_assert (NULL != pg->current_merchant_id);
171 4 : GNUNET_assert (0 == strcmp (instance_id,
172 : pg->current_merchant_id));
173 4 : TMH_PQ_prepare_anon (pg,
174 : "SELECT description"
175 : " FROM merchant_statistic_interval_meta"
176 : " WHERE slug=$1"
177 : " LIMIT 1");
178 4 : qs = GNUNET_PQ_eval_prepared_multi_select (
179 : pg->conn,
180 : "",
181 : descParams,
182 : &lookup_statistics_counter_by_interval_desc_cb,
183 : &context);
184 : /* If there was an error inside the cb, return a hard error. */
185 4 : if (context.extract_failed)
186 : {
187 0 : GNUNET_break (0);
188 0 : return GNUNET_DB_STATUS_HARD_ERROR;
189 : }
190 4 : TMH_PQ_prepare_anon (pg,
191 : "SELECT"
192 : " range"
193 : " ,rvalue"
194 : " FROM merchant_statistic_interval_number_get($1)");
195 4 : qs = GNUNET_PQ_eval_prepared_multi_select (
196 : pg->conn,
197 : "",
198 : params,
199 : &lookup_statistics_counter_by_interval_cb,
200 : &context);
201 4 : if (NULL != context.description)
202 4 : GNUNET_free (context.description);
203 : /* If there was an error inside the cb, return a hard error. */
204 4 : if (context.extract_failed)
205 : {
206 0 : GNUNET_break (0);
207 0 : return GNUNET_DB_STATUS_HARD_ERROR;
208 : }
209 4 : return qs;
210 : }
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