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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_iterate_reserve_close_info.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_iterate_reserve_close_info.h"
#include "pg_helper.h"
/**
* Closure for #iterate_reserve_close_info_cb()
*/
struct IteratorContext
{
/**
* Function to call with the results.
*/
TALER_EXCHANGEDB_KycAmountCallback cb;
/**
* Closure to pass to @e cb
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
};
/**
* Helper function for #TEH_PG_iterate_reserve_close_info().
* Calls the callback with each denomination key.
*
* @param cls a `struct IteratorContext`
* @param result db results
* @param num_results number of results in @a result
*/
static void
iterate_reserve_close_info_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct IteratorContext *ic = cls;
struct PostgresClosure *pg = ic->pg;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_Amount amount;
struct GNUNET_TIME_Absolute ts;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_absolute_time ("execution_date",
&ts),
TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
&amount),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
return;
}
ic->cb (ic->cb_cls,
&amount,
ts);
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_iterate_reserve_close_info (
void *cls,
const struct TALER_PaytoHashP *h_payto,
struct GNUNET_TIME_Absolute time_limit,
TALER_EXCHANGEDB_KycAmountCallback kac,
void *kac_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (h_payto),
GNUNET_PQ_query_param_absolute_time (&time_limit),
GNUNET_PQ_query_param_end
};
struct IteratorContext ic = {
.cb = kac,
.cb_cls = kac_cls,
.pg = pg
};
PREPARE (pg,
"iterate_reserve_close_info",
"SELECT"
" amount"
",execution_date"
" FROM reserves_close"
" WHERE wire_target_h_payto=$1"
" AND execution_date >= $2"
" ORDER BY execution_date DESC");
return GNUNET_PQ_eval_prepared_multi_select (
pg->conn,
"iterate_reserve_close_info",
params,
&iterate_reserve_close_info_cb,
&ic);
}
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