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_lock_product.c
      18              :  * @brief Implementation of the lock_product 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_lock_product.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : enum GNUNET_DB_QueryStatus
      29           12 : TMH_PG_lock_product (void *cls,
      30              :                      const char *instance_id,
      31              :                      const char *product_id,
      32              :                      const struct GNUNET_Uuid *uuid,
      33              :                      uint64_t quantity,
      34              :                      uint32_t quantity_frac,
      35              :                      struct GNUNET_TIME_Timestamp expiration_time)
      36              : {
      37           12 :   struct PostgresClosure *pg = cls;
      38           12 :   struct GNUNET_PQ_QueryParam params[] = {
      39           12 :     GNUNET_PQ_query_param_string (instance_id),
      40           12 :     GNUNET_PQ_query_param_string (product_id),
      41           12 :     GNUNET_PQ_query_param_auto_from_type (uuid),
      42           12 :     GNUNET_PQ_query_param_uint64 (&quantity),
      43           12 :     GNUNET_PQ_query_param_uint32 (&quantity_frac),
      44           12 :     GNUNET_PQ_query_param_timestamp (&expiration_time),
      45              :     GNUNET_PQ_query_param_end
      46              :   };
      47              : 
      48           12 :   check_connection (pg);
      49           12 :   PREPARE (pg,
      50              :            "lock_product",
      51              :            "WITH ps AS"
      52              :            "  (SELECT product_serial"
      53              :            "   FROM merchant_inventory"
      54              :            "   WHERE product_id=$2"
      55              :            "     AND merchant_serial="
      56              :            "     (SELECT merchant_serial"
      57              :            "        FROM merchant_instances"
      58              :            "        WHERE merchant_id=$1))"
      59              :            ",tmp AS"
      60              :            "  (SELECT"
      61              :            "     mi.product_serial"
      62              :            "    ,mi.total_stock"
      63              :            "    ,mi.total_stock_frac"
      64              :            "    ,mi.total_sold"
      65              :            "    ,mi.total_sold_frac"
      66              :            "    ,mi.total_lost"
      67              :            "    ,mi.total_lost_frac"
      68              :            "    ,mi.allow_fractional_quantity"
      69              :            "   FROM merchant_inventory mi"
      70              :            "   JOIN ps USING (product_serial))"
      71              :            "INSERT INTO merchant_inventory_locks"
      72              :            "(product_serial"
      73              :            ",lock_uuid"
      74              :            ",total_locked"
      75              :            ",total_locked_frac"
      76              :            ",expiration)"
      77              :            " SELECT tmp.product_serial, $3, $4::INT8, $5::INT4, $6"
      78              :            "   FROM tmp"
      79              :            "  WHERE (tmp.allow_fractional_quantity OR $5 = 0)"
      80              :            "    AND (tmp.total_stock = 9223372036854775807"
      81              :            "         OR ("
      82              :            "           (tmp.total_stock::NUMERIC * 1000000"
      83              :            "            + tmp.total_stock_frac::NUMERIC)"
      84              :            "           - (tmp.total_sold::NUMERIC * 1000000"
      85              :            "              + tmp.total_sold_frac::NUMERIC)"
      86              :            "           - (tmp.total_lost::NUMERIC * 1000000"
      87              :            "              + tmp.total_lost_frac::NUMERIC)"
      88              :            "           >= "
      89              :            "             (($4::NUMERIC * 1000000) + $5::NUMERIC)"
      90              :            "           + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000"
      91              :            "                                   + total_locked_frac::NUMERIC), 0)"
      92              :            "                FROM merchant_inventory_locks mil"
      93              :            "                WHERE mil.product_serial = tmp.product_serial)"
      94              :            "           + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000"
      95              :            "                                   + total_locked_frac::NUMERIC), 0)"
      96              :            "                FROM merchant_order_locks mol"
      97              :            "                WHERE mol.product_serial = tmp.product_serial)"
      98              :            "         ))");
      99           12 :   return GNUNET_PQ_eval_prepared_non_select (pg->conn,
     100              :                                              "lock_product",
     101              :                                              params);
     102              : }