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_amounts_by_range.c
18 : * @brief Implementation of the iterate_statistic_bucket_amounts_by_range function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "platform.h"
22 : #include <taler/taler_pq_lib.h>
23 : #include "merchant-database/iterate_statistic_bucket_amounts_by_range.h"
24 : #include "helper.h"
25 :
26 :
27 : /**
28 : * Context used for TALER_MERCHANTDB_iterate_statistic_bucket_amounts_by_range().
29 : */
30 : struct LookupAmountStatisticsContext2
31 : {
32 : /**
33 : * Function to call with the results.
34 : */
35 : TALER_MERCHANTDB_AmountByBucketRangeStatisticsCallback cb;
36 :
37 : /**
38 : * Closure for @a cb.
39 : */
40 : void *cb_cls;
41 :
42 : /**
43 : * Did database result extraction fail?
44 : */
45 : bool extract_failed;
46 :
47 : /**
48 : * Postgres context for array lookups
49 : */
50 : struct TALER_MERCHANTDB_PostgresContext *pg;
51 : };
52 :
53 :
54 : /**
55 : * Function to be called with the results of a SELECT statement
56 : * that has returned @a num_results results about token families.
57 : *
58 : * @param[in,out] cls of type `struct LookupAmountStatisticsContext2 *`
59 : * @param result the postgres result
60 : * @param num_results the number of results in @a result
61 : */
62 : static void
63 1 : lookup_statistics_amount_by_bucket_cb2 (void *cls,
64 : PGresult *result,
65 : unsigned int num_results)
66 : {
67 1 : struct LookupAmountStatisticsContext2 *tflc = cls;
68 1 : struct TALER_MERCHANTDB_PostgresContext *pg = tflc->pg;
69 :
70 2 : for (unsigned int i = 0; i < num_results; i++)
71 : {
72 : struct TALER_Amount *amounts;
73 : size_t num_amounts;
74 : uint64_t bucket_start_epoch;
75 1 : struct GNUNET_PQ_ResultSpec rs[] = {
76 1 : GNUNET_PQ_result_spec_uint64 ("bucket_start",
77 : &bucket_start_epoch),
78 1 : TALER_PQ_result_spec_array_amount_with_currency (pg->conn,
79 : "merchant",
80 : "cumulative_amounts",
81 : &num_amounts,
82 : &amounts),
83 : GNUNET_PQ_result_spec_end
84 : };
85 : struct GNUNET_TIME_Timestamp bucket_start;
86 :
87 1 : if (GNUNET_OK !=
88 1 : GNUNET_PQ_extract_result (result,
89 : rs,
90 : i))
91 : {
92 0 : GNUNET_break (0);
93 0 : tflc->extract_failed = true;
94 0 : return;
95 : }
96 :
97 1 : bucket_start = GNUNET_TIME_timestamp_from_s (bucket_start_epoch);
98 1 : tflc->cb (tflc->cb_cls,
99 : bucket_start,
100 : num_amounts,
101 : amounts);
102 1 : GNUNET_PQ_cleanup_result (rs);
103 : }
104 : }
105 :
106 :
107 : enum GNUNET_DB_QueryStatus
108 1 : TALER_MERCHANTDB_iterate_statistic_bucket_amounts_by_range (
109 : struct TALER_MERCHANTDB_PostgresContext *pg,
110 : const char *instance_id,
111 : const char *slug,
112 : const char *granularity,
113 : uint64_t counter,
114 : TALER_MERCHANTDB_AmountByBucketRangeStatisticsCallback cb,
115 : void *cb_cls)
116 : {
117 1 : struct LookupAmountStatisticsContext2 context = {
118 : .cb = cb,
119 : .cb_cls = cb_cls,
120 : /* Can be overwritten by the lookup_statistics_amount_by_bucket_cb2 */
121 : .extract_failed = false,
122 : .pg = pg,
123 : };
124 1 : struct GNUNET_PQ_QueryParam params[] = {
125 1 : GNUNET_PQ_query_param_string (slug),
126 1 : GNUNET_PQ_query_param_string (granularity),
127 1 : GNUNET_PQ_query_param_uint64 (&counter),
128 : GNUNET_PQ_query_param_end
129 : };
130 : enum GNUNET_DB_QueryStatus qs;
131 :
132 1 : GNUNET_assert (NULL != pg->current_merchant_id);
133 1 : GNUNET_assert (0 == strcmp (instance_id,
134 : pg->current_merchant_id));
135 1 : TMH_PQ_prepare_anon (pg,
136 : "SELECT"
137 : " msba.bucket_start"
138 : ",ARRAY_AGG ("
139 : " ROW(msba.cumulative_value::INT8, msba.cumulative_frac::INT4, msba.curr)::merchant.taler_amount_currency"
140 : " ) AS cumulative_amounts"
141 : " FROM merchant_statistic_bucket_meta msbm"
142 : " JOIN merchant_statistic_bucket_amount msba"
143 : " USING (bmeta_serial_id)"
144 : " WHERE msbm.slug=$1"
145 : " AND msba.bucket_range=$2::TEXT::merchant.statistic_range"
146 : " AND msbm.stype='amount'"
147 : " GROUP BY msba.bucket_start"
148 : " ORDER BY msba.bucket_start DESC"
149 : " LIMIT $3;");
150 1 : qs = GNUNET_PQ_eval_prepared_multi_select (
151 : pg->conn,
152 : "",
153 : params,
154 : &lookup_statistics_amount_by_bucket_cb2,
155 : &context);
156 : /* If there was an error inside the cb, return a hard error. */
157 1 : if (context.extract_failed)
158 : {
159 0 : GNUNET_break (0);
160 0 : return GNUNET_DB_STATUS_HARD_ERROR;
161 : }
162 1 : return qs;
163 : }
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