lock_product.c (4346B)
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_pq_lib.h> 23 #include "merchant-database/lock_product.h" 24 #include "helper.h" 25 26 27 enum GNUNET_DB_QueryStatus 28 TALER_MERCHANTDB_lock_product ( 29 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 (product_id), 39 GNUNET_PQ_query_param_auto_from_type (uuid), 40 GNUNET_PQ_query_param_uint64 (&quantity), 41 GNUNET_PQ_query_param_uint32 (&quantity_frac), 42 GNUNET_PQ_query_param_timestamp (&expiration_time), 43 GNUNET_PQ_query_param_end 44 }; 45 46 GNUNET_assert (NULL != pg->current_merchant_id); 47 GNUNET_assert (0 == strcmp (instance_id, 48 pg->current_merchant_id)); 49 check_connection (pg); 50 TMH_PQ_prepare_anon (pg, 51 "WITH tmp AS" 52 " (SELECT" 53 " mi.product_serial" 54 " ,mi.total_stock" 55 " ,mi.total_stock_frac" 56 " ,mi.total_sold" 57 " ,mi.total_sold_frac" 58 " ,mi.total_lost" 59 " ,mi.total_lost_frac" 60 " ,mi.allow_fractional_quantity" 61 " FROM merchant_inventory mi" 62 " WHERE mi.product_id=$1)" 63 "INSERT INTO merchant_inventory_locks" 64 "(product_serial" 65 ",lock_uuid" 66 ",total_locked" 67 ",total_locked_frac" 68 ",expiration)" 69 " SELECT tmp.product_serial, $2, $3::INT8, $4::INT4, $5" 70 " FROM tmp" 71 " WHERE (tmp.allow_fractional_quantity OR $4 = 0)" 72 " AND (tmp.total_stock = 9223372036854775807" 73 " OR (" 74 " (tmp.total_stock::NUMERIC * 1000000" 75 " + tmp.total_stock_frac::NUMERIC)" 76 " - (tmp.total_sold::NUMERIC * 1000000" 77 " + tmp.total_sold_frac::NUMERIC)" 78 " - (tmp.total_lost::NUMERIC * 1000000" 79 " + tmp.total_lost_frac::NUMERIC)" 80 " >= " 81 " (($3::NUMERIC * 1000000) + $4::NUMERIC)" 82 " + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000" 83 " + total_locked_frac::NUMERIC), 0)" 84 " FROM merchant_inventory_locks mil" 85 " WHERE mil.product_serial = tmp.product_serial)" 86 " + (SELECT COALESCE(SUM(total_locked::NUMERIC * 1000000" 87 " + total_locked_frac::NUMERIC), 0)" 88 " FROM merchant_order_locks mol" 89 " WHERE mol.product_serial = tmp.product_serial)" 90 " ))"); 91 return GNUNET_PQ_eval_prepared_non_select (pg->conn, 92 "", 93 params); 94 }