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.c
18 : * @brief Implementation of the iterate_statistic_bucket_amounts 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_amounts.h"
24 : #include "helper.h"
25 : #include "merchantdb_lib.h"
26 :
27 :
28 : /**
29 : * Context used for TALER_MERCHANTDB_iterate_statistic_bucket_amounts().
30 : */
31 : struct LookupAmountStatisticsContext
32 : {
33 : /**
34 : * Function to call with the results.
35 : */
36 : TALER_MERCHANTDB_AmountByBucketStatisticsCallback 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 : * Postgres context for array lookups
50 : */
51 : struct TALER_MERCHANTDB_PostgresContext *pg;
52 : };
53 :
54 :
55 : /**
56 : * Function to be called with the results of a SELECT statement
57 : * that has returned @a num_results results about token families.
58 : *
59 : * @param[in,out] cls of type `struct LookupAmountStatisticsContext *`
60 : * @param result the postgres result
61 : * @param num_results the number of results in @a result
62 : */
63 : static void
64 8 : lookup_statistics_amount_by_bucket_cb (void *cls,
65 : PGresult *result,
66 : unsigned int num_results)
67 : {
68 8 : struct LookupAmountStatisticsContext *tflc = cls;
69 8 : struct TALER_Amount *amounts = NULL;
70 8 : char *resp_range = NULL;
71 8 : char *resp_desc = NULL;
72 : uint64_t cur_bucket_start_epoch;
73 : uint64_t cur_bucket_end_epoch;
74 : uint64_t bmeta_id_current;
75 8 : unsigned int amounts_len = 0;
76 :
77 56 : for (unsigned int i = 0; i < num_results; i++)
78 : {
79 : struct TALER_Amount cumulative_amount;
80 : char *description;
81 : char *bucket_range;
82 : uint64_t bmeta_id;
83 : uint64_t bucket_start_epoch;
84 : uint64_t bucket_end_epoch;
85 48 : struct GNUNET_PQ_ResultSpec rs[] = {
86 48 : GNUNET_PQ_result_spec_uint64 ("bmeta_serial_id",
87 : &bmeta_id),
88 48 : GNUNET_PQ_result_spec_string ("description",
89 : &description),
90 48 : GNUNET_PQ_result_spec_uint64 ("bucket_start",
91 : &bucket_start_epoch),
92 48 : GNUNET_PQ_result_spec_uint64 ("bucket_end",
93 : &bucket_end_epoch),
94 48 : GNUNET_PQ_result_spec_string ("bucket_range",
95 : &bucket_range),
96 48 : TALER_PQ_result_spec_amount_with_currency ("cumulative_amount",
97 : &cumulative_amount),
98 : GNUNET_PQ_result_spec_end
99 : };
100 :
101 48 : if (GNUNET_OK !=
102 48 : GNUNET_PQ_extract_result (result,
103 : rs,
104 : i))
105 : {
106 0 : GNUNET_break (0);
107 0 : tflc->extract_failed = true;
108 0 : return;
109 : }
110 : /* Call callback if the bucket changed */
111 48 : if ( (NULL != resp_desc) &&
112 40 : ( (bmeta_id != bmeta_id_current) ||
113 40 : (bucket_start_epoch != cur_bucket_start_epoch) ||
114 0 : (0 != strcasecmp (resp_range,
115 : bucket_range)) ) )
116 : {
117 : struct GNUNET_TIME_Timestamp bucket_start;
118 : struct GNUNET_TIME_Timestamp bucket_end;
119 :
120 40 : bucket_start = GNUNET_TIME_timestamp_from_s (cur_bucket_start_epoch);
121 40 : bucket_end = GNUNET_TIME_timestamp_from_s (cur_bucket_end_epoch);
122 40 : tflc->cb (tflc->cb_cls,
123 : resp_desc,
124 : bucket_start,
125 : bucket_end,
126 : resp_range,
127 : amounts_len,
128 : amounts);
129 40 : GNUNET_free (resp_range);
130 40 : GNUNET_free (resp_desc);
131 40 : GNUNET_array_grow (amounts,
132 : amounts_len,
133 : 0);
134 : }
135 48 : if (NULL == resp_desc)
136 : {
137 48 : cur_bucket_end_epoch = bucket_end_epoch;
138 48 : cur_bucket_start_epoch = bucket_start_epoch;
139 48 : resp_range = GNUNET_strdup (bucket_range);
140 48 : resp_desc = GNUNET_strdup (description);
141 48 : bmeta_id_current = bmeta_id;
142 : }
143 48 : GNUNET_array_append (amounts,
144 : amounts_len,
145 : cumulative_amount);
146 48 : GNUNET_PQ_cleanup_result (rs);
147 : }
148 8 : if (0 != amounts_len)
149 : {
150 : struct GNUNET_TIME_Timestamp bucket_start;
151 : struct GNUNET_TIME_Timestamp bucket_end;
152 :
153 8 : bucket_start = GNUNET_TIME_timestamp_from_s (cur_bucket_start_epoch);
154 8 : bucket_end = GNUNET_TIME_timestamp_from_s (cur_bucket_end_epoch);
155 8 : tflc->cb (tflc->cb_cls,
156 : resp_desc,
157 : bucket_start,
158 : bucket_end,
159 : resp_range,
160 : amounts_len,
161 : amounts);
162 8 : GNUNET_array_grow (amounts,
163 : amounts_len,
164 : 0);
165 8 : GNUNET_free (resp_range);
166 8 : GNUNET_free (resp_desc);
167 : }
168 : }
169 :
170 :
171 : enum GNUNET_DB_QueryStatus
172 8 : TALER_MERCHANTDB_iterate_statistic_bucket_amounts (
173 : struct TALER_MERCHANTDB_PostgresContext *pg,
174 : const char *instance_id,
175 : const char *slug,
176 : TALER_MERCHANTDB_AmountByBucketStatisticsCallback cb,
177 : void *cb_cls)
178 : {
179 8 : struct LookupAmountStatisticsContext context = {
180 : .cb = cb,
181 : .cb_cls = cb_cls,
182 : /* Can be overwritten by the lookup_statistics_amount_by_bucket_cb */
183 : .extract_failed = false,
184 : .pg = pg,
185 : };
186 8 : struct GNUNET_PQ_QueryParam params[] = {
187 8 : GNUNET_PQ_query_param_string (slug),
188 : GNUNET_PQ_query_param_end
189 : };
190 : enum GNUNET_DB_QueryStatus qs;
191 :
192 8 : GNUNET_assert (NULL != pg->current_merchant_id);
193 8 : GNUNET_assert (0 == strcmp (instance_id,
194 : pg->current_merchant_id));
195 8 : TMH_PQ_prepare_anon (pg,
196 : "SELECT"
197 : " bmeta_serial_id"
198 : ",description"
199 : ",bucket_start"
200 : ",bucket_range::TEXT"
201 : ",merchant_statistics_bucket_end(bucket_start, bucket_range) AS bucket_end"
202 : ",(cumulative_value,cumulative_frac,curr)::merchant.taler_amount_currency AS cumulative_amount"
203 : " FROM merchant_statistic_bucket_amount"
204 : " JOIN merchant_statistic_bucket_meta"
205 : " USING (bmeta_serial_id)"
206 : " WHERE merchant_statistic_bucket_meta.slug=$1"
207 : " AND merchant_statistic_bucket_meta.stype='amount'");
208 8 : qs = GNUNET_PQ_eval_prepared_multi_select (
209 : pg->conn,
210 : "",
211 : params,
212 : &lookup_statistics_amount_by_bucket_cb,
213 : &context);
214 : /* If there was an error inside the cb, return a hard error. */
215 8 : if (context.extract_failed)
216 : {
217 0 : GNUNET_break (0);
218 0 : return GNUNET_DB_STATUS_HARD_ERROR;
219 : }
220 8 : return qs;
221 : }
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