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