diff options
Diffstat (limited to 'src/backenddb/pg_lookup_pending_webhooks.c')
| -rw-r--r-- | src/backenddb/pg_lookup_pending_webhooks.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/src/backenddb/pg_lookup_pending_webhooks.c b/src/backenddb/pg_lookup_pending_webhooks.c new file mode 100644 index 00000000..d1d3eda9 --- /dev/null +++ b/src/backenddb/pg_lookup_pending_webhooks.c @@ -0,0 +1,261 @@ +/* + This file is part of TALER + Copyright (C) 2023 Taler Systems SA + + TALER is free software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + TALER is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> + */ +/** + * @file backenddb/pg_lookup_pending_webhooks.c + * @brief Implementation of the lookup_pending_webhooks function for Postgres + * @author Iván Ávalos + */ +#include "platform.h" +#include <taler/taler_error_codes.h> +#include <taler/taler_dbevents.h> +#include <taler/taler_pq_lib.h> +#include "pg_lookup_pending_webhooks.h" +#include "pg_helper.h" + +/** + * Context used for lookup_pending_webhooks_cb(). + */ +struct LookupPendingWebhookContext +{ + /** + * Function to call with the results. + */ + TALER_MERCHANTDB_PendingWebhooksCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Did database result extraction fail? + */ + bool extract_failed; +}; + + +/** + * Function to be called with the results of a SELECT statement + * that has returned @a num_results results about webhook. + * + * @param[in,out] cls of type `struct LookupPendingWebhookContext *` + * @param result the postgres result + * @param num_results the number of results in @a result + */ +static void +lookup_pending_webhooks_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct LookupPendingWebhookContext *pwlc = cls; + + for (unsigned int i = 0; i < num_results; i++) + { + uint64_t webhook_pending_serial; + struct GNUNET_TIME_Absolute next_attempt; + uint32_t retries; + char *url; + char *http_method; + char *header = NULL; + char *body = NULL; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_uint64 ("webhook_pending_serial", + &webhook_pending_serial), + GNUNET_PQ_result_spec_absolute_time ("next_attempt", + &next_attempt), + GNUNET_PQ_result_spec_uint32 ("retries", + &retries), + GNUNET_PQ_result_spec_string ("url", + &url), + GNUNET_PQ_result_spec_string ("http_method", + &http_method), + GNUNET_PQ_result_spec_allow_null ( + GNUNET_PQ_result_spec_string ("header", + &header), + NULL), + GNUNET_PQ_result_spec_allow_null ( + GNUNET_PQ_result_spec_string ("body", + &body), + NULL), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + pwlc->extract_failed = true; + return; + } + pwlc->cb (pwlc->cb_cls, + webhook_pending_serial, + next_attempt, + retries, + url, + http_method, + header, + body); + GNUNET_PQ_cleanup_result (rs); + } +} + + +enum GNUNET_DB_QueryStatus +TMH_PG_lookup_pending_webhooks (void *cls, + TALER_MERCHANTDB_PendingWebhooksCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct LookupPendingWebhookContext pwlc = { + .cb = cb, + .cb_cls = cb_cls, + .extract_failed = false, + }; + struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get (); + struct GNUNET_PQ_QueryParam params_null[] = { + GNUNET_PQ_query_param_absolute_time (&now), + GNUNET_PQ_query_param_end + }; + + enum GNUNET_DB_QueryStatus qs; + + check_connection (pg); + PREPARE (pg, + "lookup_pending_webhooks", + "SELECT" + " webhook_pending_serial" + ",next_attempt" + ",retries" + ",url" + ",http_method" + ",header" + ",body" + " FROM merchant_pending_webhooks" + " WHERE next_attempt <= $1" + " ORDER BY next_attempt ASC" + ); + + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + "lookup_pending_webhooks", + params_null, + &lookup_pending_webhooks_cb, + &pwlc); + + if (pwlc.extract_failed) + return GNUNET_DB_STATUS_HARD_ERROR; + return qs; +} + + +enum GNUNET_DB_QueryStatus +TMH_PG_lookup_future_webhook (void *cls, + TALER_MERCHANTDB_PendingWebhooksCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct LookupPendingWebhookContext pwlc = { + .cb = cb, + .cb_cls = cb_cls, + .extract_failed = false, + }; + struct GNUNET_PQ_QueryParam params_null[] = { + GNUNET_PQ_query_param_end + }; + + enum GNUNET_DB_QueryStatus qs; + + check_connection (pg); + PREPARE (pg, + "lookup_future_webhook", + "SELECT" + " webhook_pending_serial" + ",next_attempt" + ",retries" + ",url" + ",http_method" + ",header" + ",body" + " FROM merchant_pending_webhooks" + " ORDER BY next_attempt ASC LIMIT 1" + ); + + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + "lookup_future_webhook", + params_null, + &lookup_pending_webhooks_cb, + &pwlc); + + if (pwlc.extract_failed) + return GNUNET_DB_STATUS_HARD_ERROR; + return qs; +} + + +enum GNUNET_DB_QueryStatus +TMH_PG_lookup_all_webhooks (void *cls, + const char *instance_id, + uint64_t min_row, + uint32_t max_results, + TALER_MERCHANTDB_PendingWebhooksCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct LookupPendingWebhookContext pwlc = { + .cb = cb, + .cb_cls = cb_cls, + .extract_failed = false, + }; + uint64_t max_results64 = max_results; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_string (instance_id), + GNUNET_PQ_query_param_uint64 (&min_row), + GNUNET_PQ_query_param_uint64 (&max_results64), + GNUNET_PQ_query_param_end + }; + + enum GNUNET_DB_QueryStatus qs; + + check_connection (pg); + PREPARE (pg, + "lookup_all_webhooks", + " SELECT" + " webhook_pending_serial" + ",next_attempt" + ",retries" + ",url" + ",http_method" + ",header" + ",body" + " FROM merchant_pending_webhooks" + " JOIN merchant_instances" + " USING (merchant_serial)" + " WHERE merchant_instances.merchant_id=$1" + " AND webhook_pending_serial > $2" + " ORDER BY webhook_pending_serial" + " ASC LIMIT $3"); + + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + "lookup_all_webhooks", + params, + &lookup_pending_webhooks_cb, + &pwlc); + + if (pwlc.extract_failed) + return GNUNET_DB_STATUS_HARD_ERROR; + return qs; +} |