152 lines
4.4 KiB
C
152 lines
4.4 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2022 Taler Systems SA
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file pg_select_historic_denom_revenue.c
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* @brief Low-level (statement-level) Postgres database access for the exchange
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include "taler_error_codes.h"
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#include "taler_dbevents.h"
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#include "taler_pq_lib.h"
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#include "pg_select_historic_denom_revenue.h"
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#include "pg_helper.h"
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/**
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* Closure for #historic_denom_revenue_cb().
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*/
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struct HistoricDenomRevenueContext
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{
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/**
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* Function to call for each result.
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*/
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TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb;
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/**
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* Closure for @e cb.
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*/
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void *cb_cls;
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/**
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* Plugin context.
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*/
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struct PostgresClosure *pg;
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/**
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* Number of results processed.
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*/
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enum GNUNET_DB_QueryStatus qs;
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};
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/**
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* Helper function for #TAH_PG_select_historic_denom_revenue().
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* To be called with the results of a SELECT statement
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* that has returned @a num_results results.
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*
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* @param cls closure of type `struct HistoricRevenueContext *`
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* @param result the postgres result
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* @param num_results the number of results in @a result
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*/
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static void
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historic_denom_revenue_cb (void *cls,
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PGresult *result,
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unsigned int num_results)
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{
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struct HistoricDenomRevenueContext *hrc = cls;
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struct PostgresClosure *pg = hrc->pg;
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for (unsigned int i = 0; i < num_results; i++)
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{
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struct TALER_DenominationHashP denom_pub_hash;
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struct GNUNET_TIME_Timestamp revenue_timestamp;
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struct TALER_Amount revenue_balance;
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struct TALER_Amount loss;
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struct GNUNET_PQ_ResultSpec rs[] = {
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GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
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&denom_pub_hash),
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GNUNET_PQ_result_spec_timestamp ("revenue_timestamp",
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&revenue_timestamp),
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TALER_PQ_RESULT_SPEC_AMOUNT ("revenue_balance",
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&revenue_balance),
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TALER_PQ_RESULT_SPEC_AMOUNT ("loss_balance",
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&loss),
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GNUNET_PQ_result_spec_end
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};
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if (GNUNET_OK !=
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GNUNET_PQ_extract_result (result,
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rs,
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i))
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{
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GNUNET_break (0);
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hrc->qs = GNUNET_DB_STATUS_HARD_ERROR;
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return;
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}
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hrc->qs = i + 1;
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if (GNUNET_OK !=
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hrc->cb (hrc->cb_cls,
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&denom_pub_hash,
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revenue_timestamp,
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&revenue_balance,
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&loss))
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break;
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}
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}
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enum GNUNET_DB_QueryStatus
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TAH_PG_select_historic_denom_revenue (
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void *cls,
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const struct TALER_MasterPublicKeyP *master_pub,
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TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb,
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void *cb_cls)
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{
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struct PostgresClosure *pg = cls;
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struct GNUNET_PQ_QueryParam params[] = {
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GNUNET_PQ_query_param_auto_from_type (master_pub),
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GNUNET_PQ_query_param_end
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};
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struct HistoricDenomRevenueContext hrc = {
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.cb = cb,
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.cb_cls = cb_cls,
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.pg = pg
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};
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enum GNUNET_DB_QueryStatus qs;
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PREPARE (pg,
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"auditor_historic_denomination_revenue_select",
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"SELECT"
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" denom_pub_hash"
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",revenue_timestamp"
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",revenue_balance_val"
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",revenue_balance_frac"
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",loss_balance_val"
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",loss_balance_frac"
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" FROM auditor_historic_denomination_revenue"
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" WHERE master_pub=$1;");
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qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
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"auditor_historic_denomination_revenue_select",
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params,
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&historic_denom_revenue_cb,
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&hrc);
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if (qs <= 0)
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return qs;
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return hrc.qs;
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}
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