get_extension_manifest.c (2341B)
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 exchangedb/get_extension_manifest.c 18 * @brief Implementation of the get_extension_manifest function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include "taler/taler_pq_lib.h" 22 #include "exchange-database/get_extension_manifest.h" 23 #include "helper.h" 24 25 /** 26 * Function called to get the manifest of an extension 27 * (age-restriction, policy_extension_...) 28 * 29 * @param pg the database context 30 * @param extension_name the name of the extension 31 * @param[out] manifest JSON object of the manifest as string 32 * @return transaction status code 33 */ 34 enum GNUNET_DB_QueryStatus 35 TALER_EXCHANGEDB_get_extension_manifest (struct 36 TALER_EXCHANGEDB_PostgresContext *pg, 37 const char *extension_name, 38 char **manifest) 39 { 40 struct GNUNET_PQ_QueryParam params[] = { 41 GNUNET_PQ_query_param_string (extension_name), 42 GNUNET_PQ_query_param_end 43 }; 44 bool is_null; 45 struct GNUNET_PQ_ResultSpec rs[] = { 46 GNUNET_PQ_result_spec_allow_null ( 47 GNUNET_PQ_result_spec_string ("manifest", 48 manifest), 49 &is_null), 50 GNUNET_PQ_result_spec_end 51 }; 52 53 *manifest = NULL; 54 PREPARE (pg, 55 "get_extension_manifest", 56 "SELECT" 57 " manifest" 58 " FROM extensions" 59 " WHERE name=$1;"); 60 return GNUNET_PQ_eval_prepared_singleton_select (pg->conn, 61 "get_extension_manifest", 62 params, 63 rs); 64 }