lookup_product_image.c (2011B)
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 src/backenddb/lookup_product_image.c 18 * @brief Implementation of the lookup_product_image_by_hash function for Postgres 19 * @author Bohdan Potuzhnyi 20 */ 21 #include <taler/taler_error_codes.h> 22 #include <taler/taler_pq_lib.h> 23 #include "merchantdb_lib.h" 24 #include "merchant-database/lookup_product_image.h" 25 #include "helper.h" 26 27 28 enum GNUNET_DB_QueryStatus 29 TALER_MERCHANTDB_lookup_product_image_by_hash ( 30 struct TALER_MERCHANTDB_PostgresContext *pg, 31 const char *instance_id, 32 const char *image_hash, 33 char **image) 34 { 35 struct GNUNET_PQ_QueryParam params[] = { 36 GNUNET_PQ_query_param_string (instance_id), 37 GNUNET_PQ_query_param_string (image_hash), 38 GNUNET_PQ_query_param_end 39 }; 40 41 check_connection (pg); 42 PREPARE ( 43 pg, 44 "lookup_product_image_by_hash", 45 "SELECT" 46 " mi.image" 47 " FROM merchant_inventory mi" 48 " JOIN merchant_instances inst" 49 " USING (merchant_serial)" 50 " WHERE inst.merchant_id=$1" 51 " AND mi.image_hash=$2"); 52 53 *image = NULL; 54 { 55 struct GNUNET_PQ_ResultSpec rs[] = { 56 GNUNET_PQ_result_spec_string ("image", 57 image), 58 GNUNET_PQ_result_spec_end 59 }; 60 61 return GNUNET_PQ_eval_prepared_singleton_select ( 62 pg->conn, 63 "lookup_product_image_by_hash", 64 params, 65 rs); 66 } 67 }