diff options
Diffstat (limited to 'src/backenddb/pg_select_open_transfers.c')
| -rw-r--r-- | src/backenddb/pg_select_open_transfers.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/backenddb/pg_select_open_transfers.c b/src/backenddb/pg_select_open_transfers.c new file mode 100644 index 00000000..40982011 --- /dev/null +++ b/src/backenddb/pg_select_open_transfers.c @@ -0,0 +1,167 @@ +/* + This file is part of TALER + Copyright (C) 2022 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_select_open_transfers.c + * @brief Implementation of the select_open_transfers function for Postgres + * @author Christian Grothoff + */ +#include "platform.h" +#include <taler/taler_error_codes.h> +#include <taler/taler_dbevents.h> +#include <taler/taler_pq_lib.h> +#include "pg_select_open_transfers.h" +#include "pg_helper.h" + + +/** + * Context used for open_transfers_cb(). + */ +struct SelectOpenTransfersContext +{ + /** + * Postgres context. + */ + struct PostgresClosure *pg; + + /** + * Function to call with the results. + */ + TALER_MERCHANTDB_OpenTransferCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Internal result. + */ + enum GNUNET_DB_QueryStatus qs; +}; + + +/** + * Function to be called with the results of a SELECT statement + * that has returned @a num_results results about rewards. + * + * @param[in,out] cls of type `struct SelectOpenTransfersContext *` + * @param result the postgres result + * @param num_results the number of results in @a result + */ +static void +open_transfers_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct SelectOpenTransfersContext *plc = cls; + + for (unsigned int i = 0; i < num_results; i++) + { + uint64_t rowid; + char *instance_id; + char *exchange_url; + char *payto_uri; + struct TALER_WireTransferIdentifierRawP wtid; + struct TALER_Amount total; + struct GNUNET_TIME_Absolute next_attempt; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_uint64 ("credit_serial", + &rowid), + GNUNET_PQ_result_spec_string ("instance_id", + &instance_id), + GNUNET_PQ_result_spec_string ("exchange_url", + &exchange_url), + GNUNET_PQ_result_spec_string ("payto_uri", + &payto_uri), + GNUNET_PQ_result_spec_auto_from_type ("wtid", + &wtid), + TALER_PQ_result_spec_amount_with_currency ("credit_amount", + &total), + GNUNET_PQ_result_spec_absolute_time ("next_attempt", + &next_attempt), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + plc->qs = GNUNET_DB_STATUS_HARD_ERROR; + return; + } + plc->cb (plc->cb_cls, + rowid, + instance_id, + exchange_url, + payto_uri, + &wtid, + &total, + next_attempt); + GNUNET_PQ_cleanup_result (rs); + } +} + + +enum GNUNET_DB_QueryStatus +TMH_PG_select_open_transfers (void *cls, + uint64_t limit, + TALER_MERCHANTDB_OpenTransferCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct SelectOpenTransfersContext plc = { + .pg = pg, + .cb = cb, + .cb_cls = cb_cls + }; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_uint64 (&limit), + GNUNET_PQ_query_param_end + }; + enum GNUNET_DB_QueryStatus qs; + + PREPARE (pg, + "select_open_transfers", + "SELECT" + " credit_serial" + ",merchant_id AS instance_id" + ",exchange_url" + ",payto_uri" + ",wtid" + ",credit_amount" + ",ready_time AS next_attempt" + " FROM merchant_transfers" + " JOIN merchant_accounts" + " USING (account_serial)" + " JOIN merchant_instances" + " USING (merchant_serial)" + " WHERE confirmed AND" + " NOT (failed OR verified)" + " ORDER BY ready_time ASC" + " LIMIT $1;"); + + qs = GNUNET_PQ_eval_prepared_multi_select ( + pg->conn, + "select_open_transfers", + params, + &open_transfers_cb, + &plc); + if (0 != plc.qs) + return plc.qs; + return qs; +} |