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              : }