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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_select_accounts_by_exchange.c
* @brief Implementation of the select_accounts_by_exchange 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_select_accounts_by_exchange.h"
#include "pg_helper.h"
/**
* Closure for #parse_accounts.
*/
struct SelectAccountContext
{
/**
* Function to call on each result.
*/
TALER_MERCHANTDB_ExchangeAccountCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
/**
* Set to true on failure.
*/
bool failed;
};
/**
* Function to be called with the results of a SELECT statement
* that has returned @a num_results results about accounts.
*
* @param cls of type `struct SelectAccountContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
parse_accounts (void *cls,
PGresult *result,
unsigned int num_results)
{
struct SelectAccountContext *ctx = cls;
for (unsigned int i = 0; i < num_results; i++)
{
char *payto_uri;
char *conversion_url = NULL;
json_t *debit_restrictions;
json_t *credit_restrictions;
struct TALER_MasterSignatureP master_sig;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("master_sig",
&master_sig),
GNUNET_PQ_result_spec_string ("payto_uri",
&payto_uri),
GNUNET_PQ_result_spec_allow_null (
GNUNET_PQ_result_spec_string ("conversion_url",
&conversion_url),
NULL),
TALER_PQ_result_spec_json ("debit_restrictions",
&debit_restrictions),
TALER_PQ_result_spec_json ("credit_restrictions",
&credit_restrictions),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
ctx->failed = true;
return;
}
ctx->cb (ctx->cb_cls,
payto_uri,
conversion_url,
debit_restrictions,
credit_restrictions,
&master_sig);
GNUNET_PQ_cleanup_result (rs);
}
}
enum GNUNET_DB_QueryStatus
TMH_PG_select_accounts_by_exchange (
void *cls,
const struct TALER_MasterPublicKeyP *master_pub,
TALER_MERCHANTDB_ExchangeAccountCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct SelectAccountContext ctx = {
.cb = cb,
.cb_cls = cb_cls
};
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (master_pub),
GNUNET_PQ_query_param_end
};
enum GNUNET_DB_QueryStatus qs;
check_connection (pg);
PREPARE (pg,
"select_exchange_accounts",
"SELECT"
" payto_uri"
",conversion_url"
",debit_restrictions"
",credit_restrictions"
",master_sig"
" FROM merchant_exchange_accounts"
" WHERE master_pub=$1;");
qs = GNUNET_PQ_eval_prepared_multi_select (
pg->conn,
"select_exchange_accounts",
params,
&parse_accounts,
&ctx);
if (ctx.failed)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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