lock_product.c (4343B)
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 src/backenddb/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 "merchant-database/lock_product.h" 26 #include "helper.h" 27 28 enum GNUNET_DB_QueryStatus 29 TALER_MERCHANTDB_lock_product (struct TALER_MERCHANTDB_PostgresContext *pg, 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 struct GNUNET_PQ_QueryParam params[] = { 38 GNUNET_PQ_query_param_string (instance_id), 39 GNUNET_PQ_query_param_string (product_id), 40 GNUNET_PQ_query_param_auto_from_type (uuid), 41 GNUNET_PQ_query_param_uint64 (&quantity), 42 GNUNET_PQ_query_param_uint32 (&quantity_frac), 43 GNUNET_PQ_query_param_timestamp (&expiration_time), 44 GNUNET_PQ_query_param_end 45 }; 46 47 check_connection (pg); 48 PREPARE (pg, 49 "lock_product", 50 "WITH ps AS" 51 " (SELECT product_serial" 52 " FROM merchant_inventory" 53 " WHERE product_id=$2" 54 " AND merchant_serial=" 55 " (SELECT merchant_serial" 56 " FROM merchant_instances" 57 " WHERE merchant_id=$1))" 58 ",tmp AS" 59 " (SELECT" 60 " mi.product_serial" 61 " ,mi.total_stock" 62 " ,mi.total_stock_frac" 63 " ,mi.total_sold" 64 " ,mi.total_sold_frac" 65 " ,mi.total_lost" 66 " ,mi.total_lost_frac" 67 " ,mi.allow_fractional_quantity" 68 " FROM merchant_inventory mi" 69 " JOIN ps USING (product_serial))" 70 "INSERT INTO merchant_inventory_locks" 71 "(product_serial" 72 ",lock_uuid" 73 ",total_locked" 74 ",total_locked_frac" 75 ",expiration)" 76 " SELECT tmp.product_serial, $3, $4::INT8, $5::INT4, $6" 77 " FROM tmp" 78 " WHERE (tmp.allow_fractional_quantity OR $5 = 0)" 79 " AND (tmp.total_stock = 9223372036854775807" 80 " OR (" 81 " (tmp.total_stock::NUMERIC * 1000000" 82 " + tmp.total_stock_frac::NUMERIC)" 83 " - (tmp.total_sold::NUMERIC * 1000000" 84 " + tmp.total_sold_frac::NUMERIC)" 85 " - (tmp.total_lost::NUMERIC * 1000000" 86 " + tmp.total_lost_frac::NUMERIC)" 87 " >= " 88 " (($4::NUMERIC * 1000000) + $5::NUMERIC)" 89 " + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000" 90 " + total_locked_frac::NUMERIC), 0)" 91 " FROM merchant_inventory_locks mil" 92 " WHERE mil.product_serial = tmp.product_serial)" 93 " + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000" 94 " + total_locked_frac::NUMERIC), 0)" 95 " FROM merchant_order_locks mol" 96 " WHERE mol.product_serial = tmp.product_serial)" 97 " ))"); 98 return GNUNET_PQ_eval_prepared_non_select (pg->conn, 99 "lock_product", 100 params); 101 }