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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_insert_order_lock.c
* @brief Implementation of the insert_order_lock 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_insert_order_lock.h"
#include "pg_helper.h"
enum GNUNET_DB_QueryStatus
TMH_PG_insert_order_lock (void *cls,
const char *instance_id,
const char *order_id,
const char *product_id,
uint64_t quantity)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_string (instance_id),
GNUNET_PQ_query_param_string (order_id),
GNUNET_PQ_query_param_string (product_id),
GNUNET_PQ_query_param_uint64 (&quantity),
GNUNET_PQ_query_param_end
};
check_connection (pg);
PREPARE (pg,
"insert_order_lock",
"WITH tmp AS"
" (SELECT "
" product_serial"
" ,merchant_serial"
" ,total_stock"
" ,total_sold"
" ,total_lost"
" FROM merchant_inventory"
" WHERE product_id=$3"
" AND merchant_serial="
" (SELECT merchant_serial"
" FROM merchant_instances"
" WHERE merchant_id=$1))"
" INSERT INTO merchant_order_locks"
" (product_serial"
" ,total_locked"
" ,order_serial)"
" SELECT tmp.product_serial, $4, order_serial"
" FROM merchant_orders"
" JOIN tmp USING(merchant_serial)"
" WHERE order_id=$2 AND"
" tmp.total_stock - tmp.total_sold - tmp.total_lost - $4 >= "
" (SELECT COALESCE(SUM(total_locked), 0)"
" FROM merchant_inventory_locks"
" WHERE product_serial=tmp.product_serial) + "
" (SELECT COALESCE(SUM(total_locked), 0)"
" FROM merchant_order_locks"
" WHERE product_serial=tmp.product_serial)");
return GNUNET_PQ_eval_prepared_non_select (pg->conn,
"insert_order_lock",
params);
}
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