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          10 : 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             :                      struct GNUNET_TIME_Timestamp expiration_time)
      35             : {
      36          10 :   struct PostgresClosure *pg = cls;
      37          10 :   struct GNUNET_PQ_QueryParam params[] = {
      38          10 :     GNUNET_PQ_query_param_string (instance_id),
      39          10 :     GNUNET_PQ_query_param_string (product_id),
      40          10 :     GNUNET_PQ_query_param_auto_from_type (uuid),
      41          10 :     GNUNET_PQ_query_param_uint64 (&quantity),
      42          10 :     GNUNET_PQ_query_param_timestamp (&expiration_time),
      43             :     GNUNET_PQ_query_param_end
      44             :   };
      45             : 
      46          10 :   check_connection (pg);
      47          10 :   PREPARE (pg,
      48             :            "lock_product",
      49             :            "WITH ps AS"
      50             :            "  (SELECT product_serial"
      51             :            "   FROM merchant_inventory"
      52             :            "   WHERE product_id=$2"
      53             :            "     AND merchant_serial="
      54             :            "     (SELECT merchant_serial"
      55             :            "        FROM merchant_instances"
      56             :            "        WHERE merchant_id=$1))"
      57             :            "INSERT INTO merchant_inventory_locks"
      58             :            "(product_serial"
      59             :            ",lock_uuid"
      60             :            ",total_locked"
      61             :            ",expiration)"
      62             :            " SELECT product_serial, $3, $4, $5"
      63             :            "   FROM merchant_inventory"
      64             :            "   JOIN ps USING (product_serial)"
      65             :            "   WHERE "
      66             :            "     total_stock - total_sold - total_lost - $4 >= "
      67             :            "     (SELECT COALESCE(SUM(total_locked), 0)"
      68             :            "        FROM merchant_inventory_locks"
      69             :            "        WHERE product_serial=ps.product_serial) + "
      70             :            "     (SELECT COALESCE(SUM(total_locked), 0)"
      71             :            "        FROM merchant_order_locks"
      72             :            "        WHERE product_serial=ps.product_serial)");
      73          10 :   return GNUNET_PQ_eval_prepared_non_select (pg->conn,
      74             :                                              "lock_product",
      75             :                                              params);
      76             : }