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/*
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;
}
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