lookup_pending_webhooks.c (5913B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2023 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 src/backenddb/lookup_pending_webhooks.c 18 * @brief Implementation of the lookup_pending_webhooks function for Postgres 19 * @author Iván Ávalos 20 */ 21 #include "platform.h" 22 #include <taler/taler_pq_lib.h> 23 #include "merchant-database/lookup_pending_webhooks.h" 24 #include "helper.h" 25 26 /** 27 * Context used for lookup_pending_webhooks_cb(). 28 */ 29 struct LookupPendingWebhookContext 30 { 31 /** 32 * Function to call with the results. 33 */ 34 TALER_MERCHANTDB_PendingWebhooksCallback cb; 35 36 /** 37 * Closure for @a cb. 38 */ 39 void *cb_cls; 40 41 /** 42 * Did database result extraction fail? 43 */ 44 bool extract_failed; 45 }; 46 47 48 /** 49 * Function to be called with the results of a SELECT statement 50 * that has returned @a num_results results about webhook. 51 * 52 * @param[in,out] cls of type `struct LookupPendingWebhookContext *` 53 * @param result the postgres result 54 * @param num_results the number of results in @a result 55 */ 56 static void 57 lookup_pending_webhooks_cb (void *cls, 58 PGresult *result, 59 unsigned int num_results) 60 { 61 struct LookupPendingWebhookContext *pwlc = cls; 62 63 for (unsigned int i = 0; i < num_results; i++) 64 { 65 uint64_t webhook_pending_serial; 66 struct GNUNET_TIME_Absolute next_attempt; 67 uint32_t retries; 68 char *url; 69 char *http_method; 70 char *header = NULL; 71 char *body = NULL; 72 struct GNUNET_PQ_ResultSpec rs[] = { 73 GNUNET_PQ_result_spec_uint64 ("webhook_pending_serial", 74 &webhook_pending_serial), 75 GNUNET_PQ_result_spec_absolute_time ("next_attempt", 76 &next_attempt), 77 GNUNET_PQ_result_spec_uint32 ("retries", 78 &retries), 79 GNUNET_PQ_result_spec_string ("url", 80 &url), 81 GNUNET_PQ_result_spec_string ("http_method", 82 &http_method), 83 GNUNET_PQ_result_spec_allow_null ( 84 GNUNET_PQ_result_spec_string ("header", 85 &header), 86 NULL), 87 GNUNET_PQ_result_spec_allow_null ( 88 GNUNET_PQ_result_spec_string ("body", 89 &body), 90 NULL), 91 GNUNET_PQ_result_spec_end 92 }; 93 94 if (GNUNET_OK != 95 GNUNET_PQ_extract_result (result, 96 rs, 97 i)) 98 { 99 GNUNET_break (0); 100 pwlc->extract_failed = true; 101 return; 102 } 103 pwlc->cb (pwlc->cb_cls, 104 webhook_pending_serial, 105 next_attempt, 106 retries, 107 url, 108 http_method, 109 header, 110 body); 111 GNUNET_PQ_cleanup_result (rs); 112 } 113 } 114 115 116 enum GNUNET_DB_QueryStatus 117 TALER_MERCHANTDB_lookup_pending_webhooks ( 118 struct TALER_MERCHANTDB_PostgresContext *pg, 119 TALER_MERCHANTDB_PendingWebhooksCallback cb, 120 void *cb_cls) 121 { 122 struct LookupPendingWebhookContext pwlc = { 123 .cb = cb, 124 .cb_cls = cb_cls, 125 .extract_failed = false, 126 }; 127 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get (); 128 struct GNUNET_PQ_QueryParam params[] = { 129 GNUNET_PQ_query_param_absolute_time (&now), 130 GNUNET_PQ_query_param_end 131 }; 132 enum GNUNET_DB_QueryStatus qs; 133 134 PREPARE (pg, 135 "lookup_pending_webhooks", 136 "SELECT" 137 " webhook_pending_serial" 138 " ,next_attempt" 139 " ,retries" 140 " ,url" 141 " ,http_method" 142 " ,header" 143 " ,body" 144 " FROM merchant.merchant_pending_webhooks" 145 " WHERE next_attempt <= $1" 146 " ORDER BY next_attempt ASC"); 147 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 148 "lookup_pending_webhooks", 149 params, 150 &lookup_pending_webhooks_cb, 151 &pwlc); 152 if (pwlc.extract_failed) 153 return GNUNET_DB_STATUS_HARD_ERROR; 154 return qs; 155 } 156 157 158 enum GNUNET_DB_QueryStatus 159 TALER_MERCHANTDB_lookup_future_webhook ( 160 struct TALER_MERCHANTDB_PostgresContext *pg, 161 TALER_MERCHANTDB_PendingWebhooksCallback cb, 162 void *cb_cls) 163 { 164 struct LookupPendingWebhookContext pwlc = { 165 .cb = cb, 166 .cb_cls = cb_cls, 167 .extract_failed = false, 168 }; 169 struct GNUNET_PQ_QueryParam params_null[] = { 170 GNUNET_PQ_query_param_end 171 }; 172 enum GNUNET_DB_QueryStatus qs; 173 174 PREPARE (pg, 175 "lookup_future_webhook", 176 "SELECT" 177 " webhook_pending_serial" 178 " ,next_attempt" 179 " ,retries" 180 " ,url" 181 " ,http_method" 182 " ,header" 183 " ,body" 184 " FROM merchant.merchant_pending_webhooks" 185 " ORDER BY next_attempt ASC" 186 " LIMIT 1"); 187 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 188 "lookup_future_webhook", 189 params_null, 190 &lookup_pending_webhooks_cb, 191 &pwlc); 192 if (pwlc.extract_failed) 193 return GNUNET_DB_STATUS_HARD_ERROR; 194 return qs; 195 }