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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_lock_product.c
* @brief Implementation of the lock_product 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_lock_product.h"
#include "pg_helper.h"
enum GNUNET_DB_QueryStatus
TMH_PG_lock_product (void *cls,
const char *instance_id,
const char *product_id,
const struct GNUNET_Uuid *uuid,
uint64_t quantity,
struct GNUNET_TIME_Timestamp expiration_time)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_string (instance_id),
GNUNET_PQ_query_param_string (product_id),
GNUNET_PQ_query_param_auto_from_type (uuid),
GNUNET_PQ_query_param_uint64 (&quantity),
GNUNET_PQ_query_param_timestamp (&expiration_time),
GNUNET_PQ_query_param_end
};
check_connection (pg);
PREPARE (pg,
"lock_product",
"WITH ps AS"
" (SELECT product_serial"
" FROM merchant_inventory"
" WHERE product_id=$2"
" AND merchant_serial="
" (SELECT merchant_serial"
" FROM merchant_instances"
" WHERE merchant_id=$1))"
"INSERT INTO merchant_inventory_locks"
"(product_serial"
",lock_uuid"
",total_locked"
",expiration)"
" SELECT product_serial, $3, $4, $5"
" FROM merchant_inventory"
" JOIN ps USING (product_serial)"
" WHERE "
" total_stock - total_sold - total_lost - $4 >= "
" (SELECT COALESCE(SUM(total_locked), 0)"
" FROM merchant_inventory_locks"
" WHERE product_serial=ps.product_serial) + "
" (SELECT COALESCE(SUM(total_locked), 0)"
" FROM merchant_order_locks"
" WHERE product_serial=ps.product_serial)");
return GNUNET_PQ_eval_prepared_non_select (pg->conn,
"lock_product",
params);
}
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