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/*
This file is part of TALER
Copyright (C) 2023 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_token_families.c
* @brief Implementation of the lookup_token_families function for Postgres
* @author Christian Blättler
*/
#include "platform.h"
#include <taler/taler_error_codes.h>
#include <taler/taler_dbevents.h>
#include <taler/taler_pq_lib.h>
#include "pg_lookup_token_families.h"
#include "pg_helper.h"
#include "taler_merchantdb_plugin.h"
/**
* Context used for TMH_PG_lookup_token_families().
*/
struct LookupTokenFamiliesContext
{
/**
* Function to call with the results.
*/
TALER_MERCHANTDB_TokenFamiliesCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Did database result extraction fail?
*/
bool extract_failed;
};
/**
* Function to be called with the results of a SELECT statement
* that has returned @a num_results results about token families.
*
* @param[in,out] cls of type `struct LookupTokenFamiliesContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
lookup_token_families_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct LookupTokenFamiliesContext *tflc = cls;
for (unsigned int i = 0; i < num_results; i++)
{
char *slug;
char *name;
char *kind;
struct GNUNET_TIME_Timestamp valid_after;
struct GNUNET_TIME_Timestamp valid_before;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_string ("slug",
&slug),
GNUNET_PQ_result_spec_string ("name",
&name),
GNUNET_PQ_result_spec_timestamp ("valid_after",
&valid_after),
GNUNET_PQ_result_spec_timestamp ("valid_before",
&valid_before),
GNUNET_PQ_result_spec_string ("kind",
&kind),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
tflc->extract_failed = true;
return;
}
tflc->cb (tflc->cb_cls,
slug,
name,
valid_after,
valid_before,
kind);
GNUNET_PQ_cleanup_result (rs);
}
}
enum GNUNET_DB_QueryStatus
TMH_PG_lookup_token_families (void *cls,
const char *instance_id,
TALER_MERCHANTDB_TokenFamiliesCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct LookupTokenFamiliesContext context = {
.cb = cb,
.cb_cls = cb_cls,
/* Can be overwritten by the lookup_token_families_cb */
.extract_failed = false,
};
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_string (instance_id),
GNUNET_PQ_query_param_end
};
enum GNUNET_DB_QueryStatus qs;
check_connection (pg);
PREPARE (pg,
"lookup_token_families",
"SELECT"
" slug"
",name"
",valid_after"
",valid_before"
",kind"
" FROM merchant_token_families"
" JOIN merchant_instances"
" USING (merchant_serial)"
" WHERE merchant_instances.merchant_id=$1");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"lookup_token_families",
params,
&lookup_token_families_cb,
&context);
/* If there was an error inside lookup_token_families_cb, return a hard error. */
if (context.extract_failed)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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