Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2022 Taler Systems SA
       4              : 
       5              :    TALER is free software; you can redistribute it and/or modify it under the
       6              :    terms of the GNU General Public License as published by the Free Software
       7              :    Foundation; either version 3, or (at your option) any later version.
       8              : 
       9              :    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
      10              :    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
      11              :    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
      12              : 
      13              :    You should have received a copy of the GNU General Public License along with
      14              :    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15              :  */
      16              : /**
      17              :  * @file src/backenddb/insert_order_lock.c
      18              :  * @brief Implementation of the insert_order_lock function for Postgres
      19              :  * @author Iván Ávalos
      20              :  */
      21              : #include "platform.h"
      22              : #include <taler/taler_pq_lib.h>
      23              : #include "merchant-database/insert_order_lock.h"
      24              : #include "helper.h"
      25              : 
      26              : 
      27              : enum GNUNET_DB_QueryStatus
      28           26 : TALER_MERCHANTDB_insert_order_lock (
      29              :   struct TALER_MERCHANTDB_PostgresContext *pg,
      30              :   const char *instance_id,
      31              :   const char *order_id,
      32              :   const char *product_id,
      33              :   uint64_t quantity,
      34              :   uint32_t quantity_frac)
      35              : {
      36           26 :   struct GNUNET_PQ_QueryParam params[] = {
      37           26 :     GNUNET_PQ_query_param_string (order_id),
      38           26 :     GNUNET_PQ_query_param_string (product_id),
      39           26 :     GNUNET_PQ_query_param_uint64 (&quantity),
      40           26 :     GNUNET_PQ_query_param_uint32 (&quantity_frac),
      41              :     GNUNET_PQ_query_param_end
      42              :   };
      43              : 
      44           26 :   GNUNET_assert (NULL != pg->current_merchant_id);
      45           26 :   GNUNET_assert (0 == strcmp (instance_id,
      46              :                               pg->current_merchant_id));
      47           26 :   TMH_PQ_prepare_anon (pg,
      48              :                        "WITH tmp AS"
      49              :                        "  (SELECT "
      50              :                        "      product_serial"
      51              :                        "     ,total_stock"
      52              :                        "     ,total_stock_frac"
      53              :                        "     ,total_sold"
      54              :                        "     ,total_sold_frac"
      55              :                        "     ,total_lost"
      56              :                        "     ,total_lost_frac"
      57              :                        "     ,allow_fractional_quantity"
      58              :                        "   FROM merchant_inventory"
      59              :                        "   WHERE product_id=$2)"
      60              :                        " INSERT INTO merchant_order_locks"
      61              :                        " (product_serial"
      62              :                        " ,total_locked"
      63              :                        " ,total_locked_frac"
      64              :                        " ,order_serial)"
      65              :                        " SELECT tmp.product_serial, $3::INT8, $4::INT4, order_serial"
      66              :                        "   FROM merchant_orders"
      67              :                        "   CROSS JOIN tmp"
      68              :                        "   WHERE order_id=$1"
      69              :                        "     AND (tmp.allow_fractional_quantity OR $4 = 0)"
      70              :                        "     AND (tmp.total_stock = 9223372036854775807"
      71              :                        "          OR ("
      72              :                        "            (tmp.total_stock::NUMERIC * 1000000"
      73              :                        "             + tmp.total_stock_frac::NUMERIC)"
      74              :                        "            - (tmp.total_sold::NUMERIC * 1000000"
      75              :                        "               + tmp.total_sold_frac::NUMERIC)"
      76              :                        "            - (tmp.total_lost::NUMERIC * 1000000"
      77              :                        "               + tmp.total_lost_frac::NUMERIC)"
      78              :                        "            >= "
      79              :                        "              (($3::NUMERIC * 1000000) + $4::NUMERIC)"
      80              :                        "            + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000"
      81              :                        "                                    + total_locked_frac::NUMERIC), 0)"
      82              :                        "                 FROM merchant_inventory_locks mil"
      83              :                        "                 WHERE mil.product_serial = tmp.product_serial)"
      84              :                        "            + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000"
      85              :                        "                                    + total_locked_frac::NUMERIC), 0)"
      86              :                        "                 FROM merchant_order_locks mol"
      87              :                        "                 WHERE mol.product_serial = tmp.product_serial)"
      88              :                        "          ))");
      89           26 :   return GNUNET_PQ_eval_prepared_non_select (pg->conn,
      90              :                                              "",
      91              :                                              params);
      92              : }