pg_lookup_product_image.c (2062B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2025 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_lookup_product_image.c 18 * @brief Implementation of the lookup_product_image_by_hash function for Postgres 19 * @author Bohdan Potuzhnyi 20 */ 21 #include "platform.h" 22 #include <taler/taler_error_codes.h> 23 #include <taler/taler_pq_lib.h> 24 #include "pg_lookup_product_image.h" 25 26 27 enum GNUNET_DB_QueryStatus 28 TMH_PG_lookup_product_image_by_hash (void *cls, 29 const char *instance_id, 30 const char *image_hash, 31 char **image) 32 { 33 struct PostgresClosure *pg = cls; 34 struct GNUNET_PQ_QueryParam params[] = { 35 GNUNET_PQ_query_param_string (instance_id), 36 GNUNET_PQ_query_param_string (image_hash), 37 GNUNET_PQ_query_param_end 38 }; 39 40 check_connection (pg); 41 PREPARE ( 42 pg, 43 "lookup_product_image_by_hash", 44 "SELECT" 45 " mi.image" 46 " FROM merchant_inventory mi" 47 " JOIN merchant_instances inst" 48 " USING (merchant_serial)" 49 " WHERE inst.merchant_id=$1" 50 " AND mi.image_hash=$2"); 51 52 *image = NULL; 53 { 54 struct GNUNET_PQ_ResultSpec rs[] = { 55 GNUNET_PQ_result_spec_string ("image", 56 image), 57 GNUNET_PQ_result_spec_end 58 }; 59 60 return GNUNET_PQ_eval_prepared_singleton_select ( 61 pg->conn, 62 "lookup_product_image_by_hash", 63 params, 64 rs); 65 } 66 }