Line data Source code
1 : /*
2 : This file is part of TALER
3 : (C) 2026 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU Affero 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/backend/taler-merchant-httpd_get-exchanges.c
18 : * @brief implement API for querying exchange status
19 : * @author Christian Grothoff
20 : */
21 : #include "platform.h"
22 : #include <jansson.h>
23 : #include <taler/taler_util.h>
24 : #include <taler/taler_json_lib.h>
25 : #include "taler-merchant-httpd.h"
26 : #include "taler-merchant-httpd_get-exchanges.h"
27 : #include "taler-merchant-httpd_mhd.h"
28 : #include "taler-merchant-httpd_get-exchanges.h"
29 : #include "merchant-database/iterate_exchanges.h"
30 :
31 :
32 : /**
33 : * Callback on an exchange known to us.
34 : *
35 : * @param cls closure with `json_t *` array to expand
36 : * @param exchange_url base URL of the exchange
37 : * @param keys keys of the exchange, NULL if we do not have any yet
38 : * @param next_download when will be the next download
39 : * @param keys_expiration when does the current ``/keys`` response expire
40 : * @param http_status last HTTP status from ``/keys``
41 : * @param ec last error code from fetching ``/keys``
42 : */
43 : static void
44 1 : add_exchange (
45 : void *cls,
46 : const char *exchange_url,
47 : const json_t *keys,
48 : struct GNUNET_TIME_Absolute next_download,
49 : struct GNUNET_TIME_Absolute keys_expiration,
50 : unsigned int http_status,
51 : enum TALER_ErrorCode ec)
52 : {
53 1 : json_t *xa = cls;
54 : json_t *xi;
55 1 : json_t *debit_restrictions = NULL;
56 :
57 1 : if (NULL != keys)
58 : {
59 : json_t *accounts;
60 : json_t *account;
61 : size_t i;
62 :
63 1 : accounts = json_object_get (keys,
64 : "accounts");
65 1 : debit_restrictions = json_object ();
66 1 : json_array_foreach (accounts, i, account)
67 : {
68 0 : json_t *dr = json_object_get (account,
69 : "debit_restrictions");
70 : const char *payto;
71 :
72 0 : payto = json_string_value (json_object_get (account,
73 : "payto_uri"));
74 :
75 0 : if (NULL != dr)
76 : {
77 0 : GNUNET_break (0 ==
78 : json_object_set (debit_restrictions,
79 : payto,
80 : dr));
81 : }
82 : else
83 : {
84 0 : GNUNET_break (0 ==
85 : json_object_set (debit_restrictions,
86 : payto,
87 : json_null ()));
88 : }
89 : }
90 : }
91 :
92 1 : xi = GNUNET_JSON_PACK (
93 : GNUNET_JSON_pack_string ("exchange_url",
94 : exchange_url),
95 : GNUNET_JSON_pack_timestamp ("next_download",
96 : GNUNET_TIME_absolute_to_timestamp (next_download
97 : )),
98 : GNUNET_JSON_pack_conditional (
99 : ! GNUNET_TIME_absolute_is_zero (keys_expiration),
100 : GNUNET_JSON_pack_timestamp ("keys_expiration",
101 : GNUNET_TIME_absolute_to_timestamp (
102 : keys_expiration))),
103 : GNUNET_JSON_pack_allow_null (
104 : GNUNET_JSON_pack_object_steal ("debit_restrictions",
105 : debit_restrictions)),
106 : GNUNET_JSON_pack_uint64 ("keys_http_status",
107 : http_status),
108 : GNUNET_JSON_pack_uint64 ("keys_ec",
109 : ec),
110 : GNUNET_JSON_pack_string ("keys_hint",
111 : TALER_ErrorCode_get_hint (ec)));
112 1 : GNUNET_assert (NULL != xi);
113 1 : GNUNET_assert (0 ==
114 : json_array_append_new (xa,
115 : xi));
116 1 : }
117 :
118 :
119 : enum MHD_Result
120 1 : MH_handler_exchanges (const struct TMH_RequestHandler *rh,
121 : struct MHD_Connection *connection,
122 : struct TMH_HandlerContext *hc)
123 : {
124 : json_t *exchanges;
125 : enum GNUNET_DB_QueryStatus qs;
126 :
127 1 : exchanges = json_array ();
128 1 : GNUNET_assert (NULL != exchanges);
129 1 : qs = TALER_MERCHANTDB_iterate_exchanges (TMH_db,
130 : &add_exchange,
131 : exchanges);
132 1 : if (0 > qs)
133 : {
134 0 : GNUNET_break (0);
135 0 : json_decref (exchanges);
136 0 : return TALER_MHD_reply_with_error (connection,
137 : MHD_HTTP_INTERNAL_SERVER_ERROR,
138 : TALER_EC_GENERIC_DB_FETCH_FAILED,
139 : "iterate_exchanges");
140 : }
141 1 : return TALER_MHD_REPLY_JSON_PACK (
142 : connection,
143 : MHD_HTTP_OK,
144 : GNUNET_JSON_pack_array_steal ("exchanges",
145 : exchanges));
146 : }
147 :
148 :
149 : /* end of taler-merchant-httpd_get-exchanges.c */
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