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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_transfer_summary.c
* @brief Implementation of the lookup_transfer_summary function for Postgres
* @author Iván Ávalos
*/
#include "platform.h"
#include <taler/taler_error_codes.h>
#include <taler/taler_dbevents.h>
#include <taler/taler_pq_lib.h>
#include "pg_lookup_transfer_summary.h"
#include "pg_helper.h"
/**
* Closure for #lookup_transfer_summary_cb().
*/
struct LookupTransferSummaryContext
{
/**
* Function to call for each order that was aggregated.
*/
TALER_MERCHANTDB_TransferSummaryCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
/**
* Transaction result.
*/
enum GNUNET_DB_QueryStatus qs;
};
/**
* Function to be called with the results of a SELECT statement
* that has returned @a num_results results.
*
* @param cls of type `struct LookupTransferSummaryContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
lookup_transfer_summary_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct LookupTransferSummaryContext *ltdc = cls;
for (unsigned int i = 0; i<num_results; i++)
{
char *order_id;
struct TALER_Amount deposit_value;
struct TALER_Amount deposit_fee;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_string ("order_id",
&order_id),
TALER_PQ_result_spec_amount_with_currency ("exchange_deposit_value",
&deposit_value),
TALER_PQ_result_spec_amount_with_currency ("exchange_deposit_fee",
&deposit_fee),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
ltdc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return;
}
ltdc->cb (ltdc->cb_cls,
order_id,
&deposit_value,
&deposit_fee);
GNUNET_PQ_cleanup_result (rs);
}
ltdc->qs = num_results;
}
enum GNUNET_DB_QueryStatus
TMH_PG_lookup_transfer_summary (void *cls,
const char *exchange_url,
const struct TALER_WireTransferIdentifierRawP *wtid,
TALER_MERCHANTDB_TransferSummaryCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_string (exchange_url),
GNUNET_PQ_query_param_auto_from_type (wtid),
GNUNET_PQ_query_param_end
};
struct LookupTransferSummaryContext ltdc = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg
};
enum GNUNET_DB_QueryStatus qs;
check_connection (pg);
PREPARE (pg,
"lookup_transfer_summary",
"SELECT"
" mct.order_id"
",mtc.exchange_deposit_value"
",mtc.exchange_deposit_fee"
" FROM merchant_transfers mtr"
" JOIN merchant_transfer_to_coin mtc"
" USING (credit_serial)"
" JOIN merchant_deposits dep"
" USING (deposit_serial)"
" JOIN merchant_deposit_confirmations mcon"
" USING (deposit_confirmation_serial)"
" JOIN merchant_contract_terms mct"
" USING (order_serial)"
" WHERE mtr.wtid=$2"
" AND mtr.exchange_url=$1");
qs = GNUNET_PQ_eval_prepared_multi_select (
pg->conn,
"lookup_transfer_summary",
params,
&lookup_transfer_summary_cb,
<dc);
if (0 >= qs)
return qs;
return ltdc.qs;
}
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