diff options
Diffstat (limited to 'src/auditordb/pg_select_historic_denom_revenue.c')
-rw-r--r-- | src/auditordb/pg_select_historic_denom_revenue.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/src/auditordb/pg_select_historic_denom_revenue.c b/src/auditordb/pg_select_historic_denom_revenue.c new file mode 100644 index 000000000..aa44625e7 --- /dev/null +++ b/src/auditordb/pg_select_historic_denom_revenue.c @@ -0,0 +1,146 @@ +/* + 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 pg_select_historic_denom_revenue.c + * @brief Low-level (statement-level) Postgres database access for the exchange + * @author Christian Grothoff + */ +#include "platform.h" +#include "taler_error_codes.h" +#include "taler_dbevents.h" +#include "taler_pq_lib.h" +#include "pg_select_historic_denom_revenue.h" +#include "pg_helper.h" + + +/** + * Closure for #historic_denom_revenue_cb(). + */ +struct HistoricDenomRevenueContext +{ + /** + * Function to call for each result. + */ + TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb; + + /** + * Closure for @e cb. + */ + void *cb_cls; + + /** + * Plugin context. + */ + struct PostgresClosure *pg; + + /** + * Number of results processed. + */ + enum GNUNET_DB_QueryStatus qs; +}; + + +/** + * Helper function for #TAH_PG_select_historic_denom_revenue(). + * To be called with the results of a SELECT statement + * that has returned @a num_results results. + * + * @param cls closure of type `struct HistoricRevenueContext *` + * @param result the postgres result + * @param num_results the number of results in @a result + */ +static void +historic_denom_revenue_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct HistoricDenomRevenueContext *hrc = cls; + struct PostgresClosure *pg = hrc->pg; + + for (unsigned int i = 0; i < num_results; i++) + { + struct TALER_DenominationHashP denom_pub_hash; + struct GNUNET_TIME_Timestamp revenue_timestamp; + struct TALER_Amount revenue_balance; + struct TALER_Amount loss; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash", + &denom_pub_hash), + GNUNET_PQ_result_spec_timestamp ("revenue_timestamp", + &revenue_timestamp), + TALER_PQ_RESULT_SPEC_AMOUNT ("revenue_balance", + &revenue_balance), + TALER_PQ_RESULT_SPEC_AMOUNT ("loss_balance", + &loss), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + hrc->qs = GNUNET_DB_STATUS_HARD_ERROR; + return; + } + + hrc->qs = i + 1; + if (GNUNET_OK != + hrc->cb (hrc->cb_cls, + &denom_pub_hash, + revenue_timestamp, + &revenue_balance, + &loss)) + break; + } +} + + +enum GNUNET_DB_QueryStatus +TAH_PG_select_historic_denom_revenue ( + void *cls, + TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_end + }; + struct HistoricDenomRevenueContext hrc = { + .cb = cb, + .cb_cls = cb_cls, + .pg = pg + }; + enum GNUNET_DB_QueryStatus qs; + + PREPARE (pg, + "auditor_historic_denomination_revenue_select", + "SELECT" + " denom_pub_hash" + ",revenue_timestamp" + ",revenue_balance" + ",loss_balance" + " FROM auditor_historic_denomination_revenue;"); + qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, + "auditor_historic_denomination_revenue_select", + params, + &historic_denom_revenue_cb, + &hrc); + if (qs <= 0) + return qs; + return hrc.qs; +} |