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_bucket_counters.c
18 : * @brief Implementation of the iterate_statistic_bucket_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_bucket_counters.h"
24 : #include "helper.h"
25 : #include "merchantdb_lib.h"
26 :
27 :
28 : /**
29 : * Context used for TALER_MERCHANTDB_iterate_statistic_bucket_counters().
30 : */
31 : struct LookupCounterStatisticsContext
32 : {
33 : /**
34 : * Function to call with the results.
35 : */
36 : TALER_MERCHANTDB_CounterByBucketStatisticsCallback 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 :
50 : /**
51 : * Function to be called with the results of a SELECT statement
52 : * that has returned @a num_results results about token families.
53 : *
54 : * @param[in,out] cls of type `struct LookupCounterStatisticsContext *`
55 : * @param result the postgres result
56 : * @param num_results the number of results in @a result
57 : */
58 : static void
59 7 : lookup_statistics_counter_by_bucket_cb (void *cls,
60 : PGresult *result,
61 : unsigned int num_results)
62 : {
63 7 : struct LookupCounterStatisticsContext *tflc = cls;
64 :
65 44 : for (unsigned int i = 0; i < num_results; i++)
66 : {
67 : char *description;
68 : char *bucket_range;
69 : uint64_t cumulative_number;
70 : uint64_t bucket_start_epoch;
71 : uint64_t bucket_end_epoch;
72 37 : struct GNUNET_PQ_ResultSpec rs[] = {
73 37 : GNUNET_PQ_result_spec_string ("description",
74 : &description),
75 37 : GNUNET_PQ_result_spec_uint64 ("bucket_start",
76 : &bucket_start_epoch),
77 37 : GNUNET_PQ_result_spec_uint64 ("bucket_end",
78 : &bucket_end_epoch),
79 37 : GNUNET_PQ_result_spec_string ("bucket_range",
80 : &bucket_range),
81 37 : GNUNET_PQ_result_spec_uint64 ("cumulative_number",
82 : &cumulative_number),
83 : GNUNET_PQ_result_spec_end
84 : };
85 : struct GNUNET_TIME_Timestamp bucket_start;
86 : struct GNUNET_TIME_Timestamp bucket_end;
87 :
88 37 : if (GNUNET_OK !=
89 37 : GNUNET_PQ_extract_result (result,
90 : rs,
91 : i))
92 : {
93 0 : GNUNET_break (0);
94 0 : tflc->extract_failed = true;
95 0 : return;
96 : }
97 :
98 37 : bucket_start = GNUNET_TIME_timestamp_from_s (bucket_start_epoch);
99 37 : bucket_end = GNUNET_TIME_timestamp_from_s (bucket_end_epoch);
100 37 : tflc->cb (tflc->cb_cls,
101 : description,
102 : bucket_start,
103 : bucket_end,
104 : bucket_range,
105 : cumulative_number);
106 37 : GNUNET_PQ_cleanup_result (rs);
107 : }
108 : }
109 :
110 :
111 : enum GNUNET_DB_QueryStatus
112 7 : TALER_MERCHANTDB_iterate_statistic_bucket_counters (
113 : struct TALER_MERCHANTDB_PostgresContext *pg,
114 : const char *instance_id,
115 : const char *slug,
116 : TALER_MERCHANTDB_CounterByBucketStatisticsCallback cb,
117 : void *cb_cls)
118 : {
119 7 : struct LookupCounterStatisticsContext context = {
120 : .cb = cb,
121 : .cb_cls = cb_cls,
122 : /* Can be overwritten by the lookup_statistics_counter_by_bucket_cb */
123 : .extract_failed = false,
124 : };
125 7 : struct GNUNET_PQ_QueryParam params[] = {
126 7 : GNUNET_PQ_query_param_string (slug),
127 : GNUNET_PQ_query_param_end
128 : };
129 : enum GNUNET_DB_QueryStatus qs;
130 :
131 7 : GNUNET_assert (NULL != pg->current_merchant_id);
132 7 : GNUNET_assert (0 == strcmp (instance_id,
133 : pg->current_merchant_id));
134 7 : TMH_PQ_prepare_anon (pg,
135 : "SELECT"
136 : " description"
137 : ",bucket_start"
138 : ",bucket_range::TEXT"
139 : ",merchant_statistics_bucket_end(bucket_start, bucket_range) AS bucket_end"
140 : ",cumulative_number"
141 : " FROM merchant_statistic_bucket_counter"
142 : " JOIN merchant_statistic_bucket_meta"
143 : " USING (bmeta_serial_id)"
144 : " WHERE merchant_statistic_bucket_meta.slug=$1"
145 : " AND merchant_statistic_bucket_meta.stype = 'number'");
146 7 : qs = GNUNET_PQ_eval_prepared_multi_select (
147 : pg->conn,
148 : "",
149 : params,
150 : &lookup_statistics_counter_by_bucket_cb,
151 : &context);
152 : /* If there was an error inside the cb, return a hard error. */
153 7 : if (context.extract_failed)
154 : {
155 0 : GNUNET_break (0);
156 0 : return GNUNET_DB_STATUS_HARD_ERROR;
157 : }
158 7 : return qs;
159 : }
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