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 : /**
17 : * @file get_auditor_progress.c
18 : * @brief Implementation of get_auditor_progress function
19 : * @author Christian Grothoff
20 : */
21 : #include "taler/taler_error_codes.h"
22 : #include "taler/taler_pq_lib.h"
23 : #include "auditor-database/get_auditor_progress.h"
24 : #include "pg_helper.h"
25 :
26 :
27 : /**
28 : * Closure for #auditor_progress_cb().
29 : */
30 : struct AuditorProgressContext
31 : {
32 :
33 : /**
34 : * Where to store results.
35 : */
36 : uint64_t **dst;
37 :
38 : /**
39 : * Offset in @e dst.
40 : */
41 : unsigned int off;
42 :
43 : /**
44 : * Length of array at @e dst.
45 : */
46 : unsigned int len;
47 :
48 : /**
49 : * Plugin context.
50 : */
51 : struct TALER_AUDITORDB_PostgresContext *pg;
52 :
53 : /**
54 : * Set to true on failure.
55 : */
56 : bool failure;
57 : };
58 :
59 :
60 : /**
61 : * Helper function for #TALER_AUDITORDB_get_auditor_progress().
62 : * To be called with the results of a SELECT statement
63 : * that has returned @a num_results results.
64 : *
65 : * @param cls closure of type `struct AuditorProgressContext *`
66 : * @param result the postgres result
67 : * @param num_results the number of results in @a result
68 : */
69 : static void
70 24 : auditor_progress_cb (void *cls,
71 : PGresult *result,
72 : unsigned int num_results)
73 : {
74 24 : struct AuditorProgressContext *ctx = cls;
75 :
76 24 : GNUNET_assert (num_results == ctx->len);
77 130 : for (unsigned int i = 0; i < num_results; i++)
78 : {
79 106 : bool is_missing = false;
80 106 : struct GNUNET_PQ_ResultSpec rs[] = {
81 106 : GNUNET_PQ_result_spec_allow_null (
82 : GNUNET_PQ_result_spec_uint64 ("progress_offset",
83 106 : ctx->dst[i]),
84 : &is_missing),
85 : GNUNET_PQ_result_spec_end
86 : };
87 :
88 106 : if (GNUNET_OK !=
89 106 : GNUNET_PQ_extract_result (result,
90 : rs,
91 : i))
92 : {
93 0 : GNUNET_break (0);
94 0 : ctx->failure = true;
95 0 : return;
96 : }
97 106 : if (is_missing)
98 102 : *ctx->dst[i] = 0;
99 106 : ctx->off++;
100 : }
101 : }
102 :
103 :
104 : enum GNUNET_DB_QueryStatus
105 24 : TALER_AUDITORDB_get_auditor_progress (
106 : struct TALER_AUDITORDB_PostgresContext *pg,
107 : const char *progress_key,
108 : uint64_t *progress_offset,
109 : ...)
110 : {
111 24 : unsigned int cnt = 1;
112 : va_list ap;
113 :
114 24 : va_start (ap,
115 : progress_offset);
116 106 : while (NULL != va_arg (ap,
117 : const char *))
118 : {
119 82 : cnt++;
120 82 : (void) va_arg (ap,
121 : uint64_t *);
122 : }
123 24 : va_end (ap);
124 24 : {
125 24 : const char *keys[cnt];
126 24 : uint64_t *dsts[cnt];
127 24 : unsigned int off = 1;
128 24 : struct GNUNET_PQ_QueryParam params[] = {
129 24 : GNUNET_PQ_query_param_array_ptrs_string (cnt,
130 : keys,
131 : pg->conn),
132 : GNUNET_PQ_query_param_end
133 : };
134 24 : struct AuditorProgressContext ctx = {
135 : .dst = dsts,
136 : .len = cnt,
137 : .pg = pg
138 : };
139 : enum GNUNET_DB_QueryStatus qs;
140 :
141 24 : keys[0] = progress_key;
142 24 : dsts[0] = progress_offset;
143 24 : va_start (ap,
144 : progress_offset);
145 106 : while (off < cnt)
146 : {
147 82 : keys[off] = va_arg (ap,
148 : const char *);
149 82 : dsts[off] = va_arg (ap,
150 : uint64_t *);
151 82 : off++;
152 : }
153 24 : GNUNET_assert (NULL == va_arg (ap,
154 : const char *));
155 24 : va_end (ap);
156 :
157 24 : PREPARE (pg,
158 : "get_auditor_progress",
159 : "SELECT"
160 : " auditor_do_get_auditor_progress AS progress_offset"
161 : " FROM auditor_do_get_auditor_progress "
162 : "($1);");
163 24 : ctx.off = 0;
164 24 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
165 : "get_auditor_progress",
166 : params,
167 : &auditor_progress_cb,
168 : &ctx);
169 24 : GNUNET_PQ_cleanup_query_params_closures (params);
170 24 : if (ctx.failure)
171 0 : return GNUNET_DB_STATUS_HARD_ERROR;
172 24 : if (qs < 0)
173 0 : return qs;
174 24 : GNUNET_assert (ctx.off == cnt);
175 24 : return qs;
176 : }
177 : }
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