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           11 : 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              : {
      35           11 :   struct PostgresClosure *pg = cls;
      36           11 :   struct GNUNET_PQ_QueryParam params[] = {
      37           11 :     GNUNET_PQ_query_param_string (instance_id),
      38           11 :     GNUNET_PQ_query_param_string (order_id),
      39           11 :     GNUNET_PQ_query_param_string (product_id),
      40           11 :     GNUNET_PQ_query_param_uint64 (&quantity),
      41              :     GNUNET_PQ_query_param_end
      42              :   };
      43              : 
      44           11 :   check_connection (pg);
      45           11 :   PREPARE (pg,
      46              :            "insert_order_lock",
      47              :            "WITH tmp AS"
      48              :            "  (SELECT "
      49              :            "      product_serial"
      50              :            "     ,merchant_serial"
      51              :            "     ,total_stock"
      52              :            "     ,total_sold"
      53              :            "     ,total_lost"
      54              :            "   FROM merchant_inventory"
      55              :            "   WHERE product_id=$3"
      56              :            "     AND merchant_serial="
      57              :            "     (SELECT merchant_serial"
      58              :            "        FROM merchant_instances"
      59              :            "        WHERE merchant_id=$1))"
      60              :            " INSERT INTO merchant_order_locks"
      61              :            " (product_serial"
      62              :            " ,total_locked"
      63              :            " ,order_serial)"
      64              :            " SELECT tmp.product_serial, $4, order_serial"
      65              :            "   FROM merchant_orders"
      66              :            "   JOIN tmp USING(merchant_serial)"
      67              :            "   WHERE order_id=$2 AND"
      68              :            "     tmp.total_stock - tmp.total_sold - tmp.total_lost - $4 >= "
      69              :            "     (SELECT COALESCE(SUM(total_locked), 0)"
      70              :            "        FROM merchant_inventory_locks"
      71              :            "        WHERE product_serial=tmp.product_serial) + "
      72              :            "     (SELECT COALESCE(SUM(total_locked), 0)"
      73              :            "        FROM merchant_order_locks"
      74              :            "        WHERE product_serial=tmp.product_serial)");
      75           11 :   return GNUNET_PQ_eval_prepared_non_select (pg->conn,
      76              :                                              "insert_order_lock",
      77              :                                              params);
      78              : }