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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_iterate_auditor_denominations.c
* @brief Implementation of the iterate_auditor_denominations 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_iterate_auditor_denominations.h"
#include "pg_helper.h"
/**
* Closure for #auditor_denoms_cb_helper()
*/
struct AuditorDenomsIteratorContext
{
/**
* Function to call with the results.
*/
TALER_EXCHANGEDB_AuditorDenominationsCallback cb;
/**
* Closure to pass to @e cb
*/
void *cb_cls;
};
/**
* Helper function for #postgres_iterate_auditor_denominations().
* Calls the callback with each auditor and denomination pair.
*
* @param cls a `struct AuditorDenomsIteratorContext`
* @param result db results
* @param num_results number of results in @a result
*/
static void
auditor_denoms_cb_helper (void *cls,
PGresult *result,
unsigned int num_results)
{
struct AuditorDenomsIteratorContext *dic = cls;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_AuditorPublicKeyP auditor_pub;
struct TALER_DenominationHashP h_denom_pub;
struct TALER_AuditorSignatureP auditor_sig;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("auditor_pub",
&auditor_pub),
GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
&h_denom_pub),
GNUNET_PQ_result_spec_auto_from_type ("auditor_sig",
&auditor_sig),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
return;
}
dic->cb (dic->cb_cls,
&auditor_pub,
&h_denom_pub,
&auditor_sig);
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_iterate_auditor_denominations (
void *cls,
TALER_EXCHANGEDB_AuditorDenominationsCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_end
};
struct AuditorDenomsIteratorContext dic = {
.cb = cb,
.cb_cls = cb_cls,
};
/* Used in #postgres_iterate_auditor_denominations() */
PREPARE (pg,
"select_auditor_denoms",
"SELECT"
" auditors.auditor_pub"
",denominations.denom_pub_hash"
",auditor_denom_sigs.auditor_sig"
" FROM auditor_denom_sigs"
" JOIN auditors USING (auditor_uuid)"
" JOIN denominations USING (denominations_serial)"
" WHERE auditors.is_active;");
return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"select_auditor_denoms",
params,
&auditor_denoms_cb_helper,
&dic);
}
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