Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2024 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 : #include "taler/taler_error_codes.h"
17 : #include "taler/taler_pq_lib.h"
18 : #include "pg_helper.h"
19 : #include "auditor-database/iterate_emergencies.h"
20 :
21 :
22 : /**
23 : * Hard upper bound on the number of records returned by a single
24 : * call, regardless of the limit requested by the client.
25 : */
26 : #define MAX_RECORDS 50000
27 :
28 :
29 : /**
30 : * Closure for #emergency_cb().
31 : */
32 : struct EmergencyContext
33 : {
34 :
35 : /**
36 : * Function to call for each deposit confirmation.
37 : */
38 : TALER_AUDITORDB_EmergencyCallback cb;
39 :
40 : /**
41 : * Closure for @e cb
42 : */
43 : void *cb_cls;
44 :
45 : /**
46 : * Plugin context.
47 : */
48 : struct TALER_AUDITORDB_PostgresContext *pg;
49 :
50 : /**
51 : * Query status to return.
52 : */
53 : enum GNUNET_DB_QueryStatus qs;
54 : };
55 :
56 :
57 : /**
58 : * Helper function for #TALER_AUDITORDB_iterate_emergencies().
59 : * To be called with the results of a SELECT statement
60 : * that has returned @a num_results results.
61 : *
62 : * @param cls closure of type `struct Emergency *`
63 : * @param result the postgres result
64 : * @param num_results the number of results in @a result
65 : */
66 : static void
67 0 : emergency_cb (void *cls,
68 : PGresult *result,
69 : unsigned int num_results)
70 : {
71 0 : struct EmergencyContext *dcc = cls;
72 0 : struct TALER_AUDITORDB_PostgresContext *pg = dcc->pg;
73 :
74 0 : for (unsigned int i = 0; i < num_results; i++)
75 : {
76 : struct TALER_AUDITORDB_Emergency dc;
77 0 : struct GNUNET_PQ_ResultSpec rs[] = {
78 0 : GNUNET_PQ_result_spec_uint64 ("row_id",
79 : &dc.row_id),
80 0 : GNUNET_PQ_result_spec_auto_from_type ("denompub_h",
81 : &dc.denompub_h),
82 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("denom_risk",
83 : &dc.denom_risk),
84 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("denom_loss",
85 : &dc.denom_loss),
86 0 : GNUNET_PQ_result_spec_absolute_time ("deposit_start",
87 : &dc.deposit_start),
88 0 : GNUNET_PQ_result_spec_absolute_time ("deposit_end",
89 : &dc.deposit_end),
90 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("value",
91 : &dc.value),
92 0 : GNUNET_PQ_result_spec_bool ("suppressed",
93 : &dc.suppressed),
94 : GNUNET_PQ_result_spec_end
95 : };
96 : enum GNUNET_GenericReturnValue rval;
97 :
98 0 : if (GNUNET_OK !=
99 0 : GNUNET_PQ_extract_result (result,
100 : rs,
101 : i))
102 : {
103 0 : GNUNET_break (0);
104 0 : dcc->qs = GNUNET_DB_STATUS_HARD_ERROR;
105 0 : return;
106 : }
107 0 : dcc->qs = i + 1;
108 0 : rval = dcc->cb (dcc->cb_cls,
109 : &dc);
110 0 : GNUNET_PQ_cleanup_result (rs);
111 0 : if (GNUNET_OK != rval)
112 0 : break;
113 : }
114 : }
115 :
116 :
117 : enum GNUNET_DB_QueryStatus
118 0 : TALER_AUDITORDB_iterate_emergencies (struct TALER_AUDITORDB_PostgresContext *pg,
119 : int64_t limit,
120 : uint64_t offset,
121 : bool return_suppressed,
122 : TALER_AUDITORDB_EmergencyCallback cb,
123 : void *cb_cls)
124 : {
125 0 : uint64_t plimit = GNUNET_MIN ((uint64_t) MAX_RECORDS,
126 : TALER_AUDITORDB_abs_limit (limit));
127 0 : struct GNUNET_PQ_QueryParam params[] = {
128 0 : GNUNET_PQ_query_param_uint64 (&offset),
129 0 : GNUNET_PQ_query_param_bool (return_suppressed),
130 0 : GNUNET_PQ_query_param_uint64 (&plimit),
131 : GNUNET_PQ_query_param_end
132 : };
133 0 : struct EmergencyContext dcc = {
134 : .cb = cb,
135 : .cb_cls = cb_cls,
136 : .pg = pg
137 : };
138 : enum GNUNET_DB_QueryStatus qs;
139 :
140 0 : PREPARE (pg,
141 : "iterate_emergencies_emergency_get_desc",
142 : "SELECT"
143 : " row_id"
144 : ",denompub_h"
145 : ",denom_risk"
146 : ",denom_loss"
147 : ",deposit_start"
148 : ",deposit_end"
149 : ",value"
150 : ",suppressed"
151 : " FROM auditor_emergency"
152 : " WHERE (row_id < $1)"
153 : " AND ($2 OR NOT suppressed)"
154 : " ORDER BY row_id DESC"
155 : " LIMIT $3"
156 : );
157 0 : PREPARE (pg,
158 : "iterate_emergencies_emergency_get_asc",
159 : "SELECT"
160 : " row_id"
161 : ",denompub_h"
162 : ",denom_risk"
163 : ",denom_loss"
164 : ",deposit_start"
165 : ",deposit_end"
166 : ",value"
167 : ",suppressed"
168 : " FROM auditor_emergency"
169 : " WHERE (row_id > $1)"
170 : " AND ($2 OR NOT suppressed)"
171 : " ORDER BY row_id ASC"
172 : " LIMIT $3"
173 : );
174 0 : qs = GNUNET_PQ_eval_prepared_multi_select (
175 : pg->conn,
176 : (limit > 0)
177 : ? "iterate_emergencies_emergency_get_asc"
178 : : "iterate_emergencies_emergency_get_desc",
179 : params,
180 : &emergency_cb,
181 : &dcc);
182 :
183 0 : if (qs > 0)
184 0 : return dcc.qs;
185 0 : GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
186 0 : return qs;
187 : }
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