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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 backenddb/pg_lookup_template.c
* @brief Implementation of the lookup_template function for Postgres
* @author Christian Grothoff
*/
#include "platform.h"
#include <taler/taler_error_codes.h>
#include <taler/taler_dbevents.h>
#include <taler/taler_pq_lib.h>
#include "pg_lookup_template.h"
#include "pg_helper.h"
/**
* Lookup details about a particular template.
*
* @param cls closure
* @param instance_id instance to lookup template for
* @param template_id template to lookup
* @param[out] td set to the template details on success, can be NULL
* (in that case we only want to check if the template exists)
* @return database result code
*/
enum GNUNET_DB_QueryStatus
TMH_PG_lookup_template (void *cls,
const char *instance_id,
const char *template_id,
struct TALER_MERCHANTDB_TemplateDetails *td)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_string (instance_id),
GNUNET_PQ_query_param_string (template_id),
GNUNET_PQ_query_param_end
};
check_connection (pg);
PREPARE (pg,
"lookup_template",
"SELECT"
" mt.template_description"
",mod.otp_id"
",mt.template_contract"
" FROM merchant_template mt"
" JOIN merchant_instances mi"
" ON (mi.merchant_serial = mt.merchant_serial)"
" LEFT JOIN merchant_otp_devices mod"
" ON (mod.otp_serial = mt.otp_device_id)"
" WHERE mi.merchant_id=$1"
" AND mt.template_id=$2");
if (NULL == td)
{
struct GNUNET_PQ_ResultSpec rs_null[] = {
GNUNET_PQ_result_spec_end
};
return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"lookup_template",
params,
rs_null);
}
else
{
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_string ("template_description",
&td->template_description),
GNUNET_PQ_result_spec_allow_null (
GNUNET_PQ_result_spec_string ("otp_id",
&td->otp_id),
NULL),
TALER_PQ_result_spec_json ("template_contract",
&td->template_contract),
GNUNET_PQ_result_spec_end
};
td->otp_id = NULL;
return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
"lookup_template",
params,
rs);
}
}
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