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             : }