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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 exchangedb/pg_find_aggregation_transient.c
* @brief Implementation of the find_aggregation_transient function for Postgres
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_error_codes.h"
#include "taler_dbevents.h"
#include "taler_pq_lib.h"
#include "pg_find_aggregation_transient.h"
#include "pg_helper.h"
/**
* Closure for #get_refunds_cb().
*/
struct FindAggregationTransientContext
{
/**
* Function to call on each result.
*/
TALER_EXCHANGEDB_TransientAggregationCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
/**
* Set to #GNUNET_SYSERR on error.
*/
enum GNUNET_GenericReturnValue status;
};
/**
* Function to be called with the results of a SELECT statement
* that has returned @a num_results results.
*
* @param cls closure of type `struct SelectRefundContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
get_transients_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct FindAggregationTransientContext *srctx = cls;
struct PostgresClosure *pg = srctx->pg;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_Amount amount;
char *payto_uri;
struct TALER_WireTransferIdentifierRawP wtid;
struct TALER_MerchantPublicKeyP merchant_pub;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("merchant_pub",
&merchant_pub),
GNUNET_PQ_result_spec_auto_from_type ("wtid_raw",
&wtid),
GNUNET_PQ_result_spec_string ("payto_uri",
&payto_uri),
TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
&amount),
GNUNET_PQ_result_spec_end
};
bool cont;
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
srctx->status = GNUNET_SYSERR;
return;
}
cont = srctx->cb (srctx->cb_cls,
payto_uri,
&wtid,
&merchant_pub,
&amount);
GNUNET_free (payto_uri);
if (! cont)
break;
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_find_aggregation_transient (
void *cls,
const struct TALER_PaytoHashP *h_payto,
TALER_EXCHANGEDB_TransientAggregationCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
enum GNUNET_DB_QueryStatus qs;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (h_payto),
GNUNET_PQ_query_param_end
};
struct FindAggregationTransientContext srctx = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg,
.status = GNUNET_OK
};
/* Used in #postgres_find_aggregation_transient() */
PREPARE (pg,
"find_transient_aggregations",
"SELECT"
" amount_val"
" ,amount_frac"
" ,wtid_raw"
" ,merchant_pub"
" ,payto_uri"
" FROM aggregation_transient atr"
" JOIN wire_targets wt USING (wire_target_h_payto)"
" WHERE atr.wire_target_h_payto=$1;");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"find_transient_aggregations",
params,
&get_transients_cb,
&srctx);
if (GNUNET_SYSERR == srctx.status)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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