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 backenddb/pg_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_error_codes.h>
      23              : #include <taler/taler_dbevents.h>
      24              : #include <taler/taler_pq_lib.h>
      25              : #include "pg_insert_order_lock.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : enum GNUNET_DB_QueryStatus
      29           14 : TMH_PG_insert_order_lock (void *cls,
      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           14 :   struct PostgresClosure *pg = cls;
      37           14 :   struct GNUNET_PQ_QueryParam params[] = {
      38           14 :     GNUNET_PQ_query_param_string (instance_id),
      39           14 :     GNUNET_PQ_query_param_string (order_id),
      40           14 :     GNUNET_PQ_query_param_string (product_id),
      41           14 :     GNUNET_PQ_query_param_uint64 (&quantity),
      42           14 :     GNUNET_PQ_query_param_uint32 (&quantity_frac),
      43              :     GNUNET_PQ_query_param_end
      44              :   };
      45              : 
      46           14 :   check_connection (pg);
      47           14 :   PREPARE (pg,
      48              :            "insert_order_lock",
      49              :            "WITH tmp AS"
      50              :            "  (SELECT "
      51              :            "      product_serial"
      52              :            "     ,merchant_serial"
      53              :            "     ,total_stock"
      54              :            "     ,total_stock_frac"
      55              :            "     ,total_sold"
      56              :            "     ,total_sold_frac"
      57              :            "     ,total_lost"
      58              :            "     ,total_lost_frac"
      59              :            "     ,allow_fractional_quantity"
      60              :            "   FROM merchant_inventory"
      61              :            "   WHERE product_id=$3"
      62              :            "     AND merchant_serial="
      63              :            "     (SELECT merchant_serial"
      64              :            "        FROM merchant_instances"
      65              :            "        WHERE merchant_id=$1))"
      66              :            " INSERT INTO merchant_order_locks"
      67              :            " (product_serial"
      68              :            " ,total_locked"
      69              :            " ,total_locked_frac"
      70              :            " ,order_serial)"
      71              :            " SELECT tmp.product_serial, $4::INT8, $5::INT4, order_serial"
      72              :            "   FROM merchant_orders"
      73              :            "   JOIN tmp USING(merchant_serial)"
      74              :            "   WHERE order_id=$2"
      75              :            "     AND (tmp.allow_fractional_quantity OR $5 = 0)"
      76              :            "     AND (tmp.total_stock = 9223372036854775807"
      77              :            "          OR ("
      78              :            "            (tmp.total_stock::NUMERIC * 1000000"
      79              :            "             + tmp.total_stock_frac::NUMERIC)"
      80              :            "            - (tmp.total_sold::NUMERIC * 1000000"
      81              :            "               + tmp.total_sold_frac::NUMERIC)"
      82              :            "            - (tmp.total_lost::NUMERIC * 1000000"
      83              :            "               + tmp.total_lost_frac::NUMERIC)"
      84              :            "            >= "
      85              :            "              (($4::NUMERIC * 1000000) + $5::NUMERIC)"
      86              :            "            + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000"
      87              :            "                                    + total_locked_frac::NUMERIC), 0)"
      88              :            "                 FROM merchant_inventory_locks mil"
      89              :            "                 WHERE mil.product_serial = tmp.product_serial)"
      90              :            "            + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000"
      91              :            "                                    + total_locked_frac::NUMERIC), 0)"
      92              :            "                 FROM merchant_order_locks mol"
      93              :            "                 WHERE mol.product_serial = tmp.product_serial)"
      94              :            "          ))");
      95           14 :   return GNUNET_PQ_eval_prepared_non_select (pg->conn,
      96              :                                              "insert_order_lock",
      97              :                                              params);
      98              : }