pg_lookup_pending_webhooks.c (7845B)
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 backenddb/pg_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_error_codes.h> 23 #include <taler/taler_dbevents.h> 24 #include <taler/taler_pq_lib.h> 25 #include "pg_lookup_pending_webhooks.h" 26 #include "pg_helper.h" 27 28 /** 29 * Context used for lookup_pending_webhooks_cb(). 30 */ 31 struct LookupPendingWebhookContext 32 { 33 /** 34 * Function to call with the results. 35 */ 36 TALER_MERCHANTDB_PendingWebhooksCallback cb; 37 38 /** 39 * Closure for @a cb. 40 */ 41 void *cb_cls; 42 43 /** 44 * Did database result extraction fail? 45 */ 46 bool extract_failed; 47 }; 48 49 50 /** 51 * Function to be called with the results of a SELECT statement 52 * that has returned @a num_results results about webhook. 53 * 54 * @param[in,out] cls of type `struct LookupPendingWebhookContext *` 55 * @param result the postgres result 56 * @param num_results the number of results in @a result 57 */ 58 static void 59 lookup_pending_webhooks_cb (void *cls, 60 PGresult *result, 61 unsigned int num_results) 62 { 63 struct LookupPendingWebhookContext *pwlc = cls; 64 65 for (unsigned int i = 0; i < num_results; i++) 66 { 67 uint64_t webhook_pending_serial; 68 struct GNUNET_TIME_Absolute next_attempt; 69 uint32_t retries; 70 char *url; 71 char *http_method; 72 char *header = NULL; 73 char *body = NULL; 74 struct GNUNET_PQ_ResultSpec rs[] = { 75 GNUNET_PQ_result_spec_uint64 ("webhook_pending_serial", 76 &webhook_pending_serial), 77 GNUNET_PQ_result_spec_absolute_time ("next_attempt", 78 &next_attempt), 79 GNUNET_PQ_result_spec_uint32 ("retries", 80 &retries), 81 GNUNET_PQ_result_spec_string ("url", 82 &url), 83 GNUNET_PQ_result_spec_string ("http_method", 84 &http_method), 85 GNUNET_PQ_result_spec_allow_null ( 86 GNUNET_PQ_result_spec_string ("header", 87 &header), 88 NULL), 89 GNUNET_PQ_result_spec_allow_null ( 90 GNUNET_PQ_result_spec_string ("body", 91 &body), 92 NULL), 93 GNUNET_PQ_result_spec_end 94 }; 95 96 if (GNUNET_OK != 97 GNUNET_PQ_extract_result (result, 98 rs, 99 i)) 100 { 101 GNUNET_break (0); 102 pwlc->extract_failed = true; 103 return; 104 } 105 pwlc->cb (pwlc->cb_cls, 106 webhook_pending_serial, 107 next_attempt, 108 retries, 109 url, 110 http_method, 111 header, 112 body); 113 GNUNET_PQ_cleanup_result (rs); 114 } 115 } 116 117 118 enum GNUNET_DB_QueryStatus 119 TMH_PG_lookup_pending_webhooks (void *cls, 120 TALER_MERCHANTDB_PendingWebhooksCallback cb, 121 void *cb_cls) 122 { 123 struct PostgresClosure *pg = cls; 124 struct LookupPendingWebhookContext pwlc = { 125 .cb = cb, 126 .cb_cls = cb_cls, 127 .extract_failed = false, 128 }; 129 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get (); 130 struct GNUNET_PQ_QueryParam params_null[] = { 131 GNUNET_PQ_query_param_absolute_time (&now), 132 GNUNET_PQ_query_param_end 133 }; 134 135 enum GNUNET_DB_QueryStatus qs; 136 137 check_connection (pg); 138 PREPARE (pg, 139 "lookup_pending_webhooks", 140 "SELECT" 141 " webhook_pending_serial" 142 ",next_attempt" 143 ",retries" 144 ",url" 145 ",http_method" 146 ",header" 147 ",body" 148 " FROM merchant_pending_webhooks" 149 " WHERE next_attempt <= $1" 150 " ORDER BY next_attempt ASC" 151 ); 152 153 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 154 "lookup_pending_webhooks", 155 params_null, 156 &lookup_pending_webhooks_cb, 157 &pwlc); 158 159 if (pwlc.extract_failed) 160 return GNUNET_DB_STATUS_HARD_ERROR; 161 return qs; 162 } 163 164 165 enum GNUNET_DB_QueryStatus 166 TMH_PG_lookup_future_webhook (void *cls, 167 TALER_MERCHANTDB_PendingWebhooksCallback cb, 168 void *cb_cls) 169 { 170 struct PostgresClosure *pg = cls; 171 struct LookupPendingWebhookContext pwlc = { 172 .cb = cb, 173 .cb_cls = cb_cls, 174 .extract_failed = false, 175 }; 176 struct GNUNET_PQ_QueryParam params_null[] = { 177 GNUNET_PQ_query_param_end 178 }; 179 180 enum GNUNET_DB_QueryStatus qs; 181 182 check_connection (pg); 183 PREPARE (pg, 184 "lookup_future_webhook", 185 "SELECT" 186 " webhook_pending_serial" 187 ",next_attempt" 188 ",retries" 189 ",url" 190 ",http_method" 191 ",header" 192 ",body" 193 " FROM merchant_pending_webhooks" 194 " ORDER BY next_attempt ASC LIMIT 1" 195 ); 196 197 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 198 "lookup_future_webhook", 199 params_null, 200 &lookup_pending_webhooks_cb, 201 &pwlc); 202 203 if (pwlc.extract_failed) 204 return GNUNET_DB_STATUS_HARD_ERROR; 205 return qs; 206 } 207 208 209 enum GNUNET_DB_QueryStatus 210 TMH_PG_lookup_all_webhooks (void *cls, 211 const char *instance_id, 212 uint64_t min_row, 213 uint32_t max_results, 214 TALER_MERCHANTDB_PendingWebhooksCallback cb, 215 void *cb_cls) 216 { 217 struct PostgresClosure *pg = cls; 218 struct LookupPendingWebhookContext pwlc = { 219 .cb = cb, 220 .cb_cls = cb_cls, 221 .extract_failed = false, 222 }; 223 uint64_t max_results64 = max_results; 224 struct GNUNET_PQ_QueryParam params[] = { 225 GNUNET_PQ_query_param_string (instance_id), 226 GNUNET_PQ_query_param_uint64 (&min_row), 227 GNUNET_PQ_query_param_uint64 (&max_results64), 228 GNUNET_PQ_query_param_end 229 }; 230 231 enum GNUNET_DB_QueryStatus qs; 232 233 check_connection (pg); 234 PREPARE (pg, 235 "lookup_all_webhooks", 236 " SELECT" 237 " webhook_pending_serial" 238 ",next_attempt" 239 ",retries" 240 ",url" 241 ",http_method" 242 ",header" 243 ",body" 244 " FROM merchant_pending_webhooks" 245 " JOIN merchant_instances" 246 " USING (merchant_serial)" 247 " WHERE merchant_instances.merchant_id=$1" 248 " AND webhook_pending_serial > $2" 249 " ORDER BY webhook_pending_serial" 250 " ASC LIMIT $3"); 251 252 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 253 "lookup_all_webhooks", 254 params, 255 &lookup_pending_webhooks_cb, 256 &pwlc); 257 258 if (pwlc.extract_failed) 259 return GNUNET_DB_STATUS_HARD_ERROR; 260 return qs; 261 }