Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2024, 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 exchangedb/iterate_aml_measures.c
18 : * @brief Implementation of the iterate_aml_measures function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "taler/taler_pq_lib.h"
22 : #include "exchange-database/iterate_aml_measures.h"
23 : #include "helper.h"
24 :
25 :
26 : /**
27 : * Hard upper bound on the number of records returned by a single
28 : * call, regardless of the limit requested by the client.
29 : */
30 : #define MAX_RECORDS 50000
31 :
32 :
33 : /**
34 : * Closure for #handle_aml_result.
35 : */
36 : struct LegiMeasureResultContext
37 : {
38 : /**
39 : * Function to call on each result.
40 : */
41 : TALER_EXCHANGEDB_LegitimizationMeasureCallback cb;
42 :
43 : /**
44 : * Closure for @e cb.
45 : */
46 : void *cb_cls;
47 :
48 : /**
49 : * Plugin context.
50 : */
51 : struct TALER_EXCHANGEDB_PostgresContext *pg;
52 :
53 : /**
54 : * Set to #GNUNET_SYSERR on serious errors.
55 : */
56 : enum GNUNET_GenericReturnValue status;
57 : };
58 :
59 :
60 : /**
61 : * Function to be called with the results of a SELECT statement
62 : * that has returned @a num_results results. Helper function
63 : * for #TALER_EXCHANGEDB_iterate_aml_measures().
64 : *
65 : * @param cls closure of type `struct LegiMeasureResultContext *`
66 : * @param result the postgres result
67 : * @param num_results the number of results in @a result
68 : */
69 : static void
70 7 : handle_aml_result (void *cls,
71 : PGresult *result,
72 : unsigned int num_results)
73 : {
74 7 : struct LegiMeasureResultContext *ctx = cls;
75 :
76 17 : for (unsigned int i = 0; i<num_results; i++)
77 : {
78 : struct TALER_NormalizedPaytoHashP h_payto;
79 : uint64_t rowid;
80 : struct GNUNET_TIME_Absolute start_time;
81 : json_t *jmeasures;
82 : bool is_finished;
83 10 : struct GNUNET_PQ_ResultSpec rs[] = {
84 10 : GNUNET_PQ_result_spec_uint64 ("legitimization_measure_serial_id",
85 : &rowid),
86 10 : GNUNET_PQ_result_spec_auto_from_type ("h_normalized_payto",
87 : &h_payto),
88 10 : GNUNET_PQ_result_spec_absolute_time ("start_time",
89 : &start_time),
90 10 : TALER_PQ_result_spec_json ("jmeasures",
91 : &jmeasures),
92 10 : GNUNET_PQ_result_spec_bool ("is_finished",
93 : &is_finished),
94 : GNUNET_PQ_result_spec_end
95 : };
96 :
97 10 : if (GNUNET_OK !=
98 10 : GNUNET_PQ_extract_result (result,
99 : rs,
100 : i))
101 : {
102 0 : GNUNET_break (0);
103 0 : ctx->status = GNUNET_SYSERR;
104 0 : return;
105 : }
106 10 : ctx->cb (ctx->cb_cls,
107 : &h_payto,
108 : start_time,
109 : jmeasures,
110 : is_finished,
111 : rowid);
112 10 : GNUNET_PQ_cleanup_result (rs);
113 : }
114 : }
115 :
116 :
117 : enum GNUNET_DB_QueryStatus
118 7 : TALER_EXCHANGEDB_iterate_aml_measures (
119 : struct TALER_EXCHANGEDB_PostgresContext *pg,
120 : const struct TALER_NormalizedPaytoHashP *h_payto,
121 : enum TALER_EXCHANGE_YesNoAll active_only,
122 : uint64_t offset,
123 : int64_t limit,
124 : TALER_EXCHANGEDB_LegitimizationMeasureCallback cb,
125 : void *cb_cls)
126 : {
127 7 : uint64_t ulimit = GNUNET_MIN ((uint64_t) MAX_RECORDS,
128 : TALER_EXCHANGEDB_abs_limit (limit));
129 7 : struct GNUNET_PQ_QueryParam params[] = {
130 7 : GNUNET_PQ_query_param_bool (NULL == h_payto),
131 : NULL == h_payto
132 2 : ? GNUNET_PQ_query_param_null ()
133 7 : : GNUNET_PQ_query_param_auto_from_type (h_payto),
134 7 : GNUNET_PQ_query_param_bool ((TALER_EXCHANGE_YNA_ALL ==
135 : active_only)),
136 7 : GNUNET_PQ_query_param_bool ((TALER_EXCHANGE_YNA_NO ==
137 : active_only)),
138 7 : GNUNET_PQ_query_param_uint64 (&offset),
139 7 : GNUNET_PQ_query_param_uint64 (&ulimit),
140 : GNUNET_PQ_query_param_end
141 : };
142 7 : struct LegiMeasureResultContext ctx = {
143 : .cb = cb,
144 : .cb_cls = cb_cls,
145 : .pg = pg,
146 : .status = GNUNET_OK
147 : };
148 : enum GNUNET_DB_QueryStatus qs;
149 7 : const char *stmt = (limit > 0)
150 : ? "iterate_aml_measures_inc"
151 : : "iterate_aml_measures_dec";
152 :
153 7 : PREPARE (pg,
154 : "iterate_aml_measures_inc",
155 : "SELECT"
156 : " lm.legitimization_measure_serial_id"
157 : ",kt.h_normalized_payto"
158 : ",lm.jmeasures::TEXT"
159 : ",lm.start_time"
160 : ",lm.is_finished"
161 : " FROM kyc_targets kt"
162 : " JOIN legitimization_measures lm"
163 : " USING (access_token)"
164 : " WHERE (legitimization_measure_serial_id > $5)"
165 : " AND ($1 OR (kt.h_normalized_payto = $2))"
166 : " AND ($3 OR (lm.is_finished = $4))"
167 : " ORDER BY lm.legitimization_measure_serial_id ASC"
168 : " LIMIT $6");
169 7 : PREPARE (pg,
170 : "iterate_aml_measures_dec",
171 : "SELECT"
172 : " lm.legitimization_measure_serial_id"
173 : ",kt.h_normalized_payto"
174 : ",lm.jmeasures::TEXT"
175 : ",lm.start_time"
176 : ",lm.is_finished"
177 : " FROM kyc_targets kt"
178 : " JOIN legitimization_measures lm"
179 : " USING (access_token)"
180 : " WHERE (legitimization_measure_serial_id < $5)"
181 : " AND ($1 OR (kt.h_normalized_payto = $2))"
182 : " AND ($3 OR (lm.is_finished = $4))"
183 : " ORDER BY lm.legitimization_measure_serial_id DESC"
184 : " LIMIT $6");
185 7 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
186 : stmt,
187 : params,
188 : &handle_aml_result,
189 : &ctx);
190 7 : if (GNUNET_OK != ctx.status)
191 0 : return GNUNET_DB_STATUS_HARD_ERROR;
192 7 : return qs;
193 : }
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