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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 auditordb/pg_select_purse_expired.c
* @brief Implementation of the select_purse_expired 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_select_purse_expired.h"
#include "pg_helper.h"
/**
* Closure for #purse_expired_cb().
*/
struct PurseExpiredContext
{
/**
* Function to call for each expired purse.
*/
TALER_AUDITORDB_ExpiredPurseCallback cb;
/**
* Closure for @e cb
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
/**
* Query status to return.
*/
enum GNUNET_DB_QueryStatus qs;
};
/**
* Helper function for #TAH_PG_select_purse_expired().
* To be called with the results of a SELECT statement
* that has returned @a num_results results.
*
* @param cls closure of type `struct PurseExpiredContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
purse_expired_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct PurseExpiredContext *eic = cls;
struct PostgresClosure *pg = eic->pg;
for (unsigned int i = 0; i < num_results; i++)
{
struct TALER_PurseContractPublicKeyP purse_pub;
struct GNUNET_TIME_Timestamp expiration_date;
struct TALER_Amount balance;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("purse_pub",
&purse_pub),
TALER_PQ_RESULT_SPEC_AMOUNT ("balance",
&balance),
GNUNET_PQ_result_spec_timestamp ("expiration_date",
&expiration_date),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
eic->qs = GNUNET_DB_STATUS_HARD_ERROR;
return;
}
eic->qs = i + 1;
if (GNUNET_OK !=
eic->cb (eic->cb_cls,
&purse_pub,
&balance,
expiration_date))
break;
}
}
enum GNUNET_DB_QueryStatus
TAH_PG_select_purse_expired (
void *cls,
TALER_AUDITORDB_ExpiredPurseCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_TIME_Timestamp now
= GNUNET_TIME_timestamp_get ();
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_timestamp (&now),
GNUNET_PQ_query_param_end
};
struct PurseExpiredContext eic = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg
};
enum GNUNET_DB_QueryStatus qs;
PREPARE (pg,
"auditor_select_expired_purses",
"SELECT"
" purse_pub"
",expiration_date"
",balance"
" FROM auditor_purses"
" AND expiration_date<$1;");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"auditor_select_expired_purses",
params,
&purse_expired_cb,
&eic);
if (qs > 0)
return eic.qs;
GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
return qs;
}
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