lookup_custom_units_by_names.c (4933B)
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_custom_units_by_names.c 18 * @brief Lookup custom measurement units by name 19 * @author Bohdan Potuzhnyi 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/lookup_custom_units_by_names.h" 26 #include "helper.h" 27 28 29 /** 30 * Context used for TALER_MERCHANTDB_lookup_custom_units_by_names(). 31 */ 32 struct LookupUnitsContext 33 { 34 TALER_MERCHANTDB_UnitsCallback cb; 35 void *cb_cls; 36 bool extract_failed; 37 }; 38 39 40 static void 41 lookup_units_cb (void *cls, 42 PGresult *result, 43 unsigned int num_results) 44 { 45 struct LookupUnitsContext *luc = cls; 46 47 for (unsigned int i = 0; i<num_results; i++) 48 { 49 struct TALER_MERCHANTDB_UnitDetails ud = { 0 }; 50 struct GNUNET_PQ_ResultSpec rs[] = { 51 GNUNET_PQ_result_spec_uint64 ("unit_serial", 52 &ud.unit_serial), 53 GNUNET_PQ_result_spec_string ("unit", 54 &ud.unit), 55 GNUNET_PQ_result_spec_string ("unit_name_long", 56 &ud.unit_name_long), 57 GNUNET_PQ_result_spec_string ("unit_name_short", 58 &ud.unit_name_short), 59 TALER_PQ_result_spec_json ("unit_name_long_i18n", 60 &ud.unit_name_long_i18n), 61 TALER_PQ_result_spec_json ("unit_name_short_i18n", 62 &ud.unit_name_short_i18n), 63 GNUNET_PQ_result_spec_bool ("unit_allow_fraction", 64 &ud.unit_allow_fraction), 65 GNUNET_PQ_result_spec_uint32 ("unit_precision_level", 66 &ud.unit_precision_level), 67 GNUNET_PQ_result_spec_bool ("unit_active", 68 &ud.unit_active), 69 GNUNET_PQ_result_spec_bool ("unit_builtin", 70 &ud.unit_builtin), 71 GNUNET_PQ_result_spec_end 72 }; 73 74 if (GNUNET_OK != 75 GNUNET_PQ_extract_result (result, 76 rs, 77 i)) 78 { 79 GNUNET_break (0); 80 luc->extract_failed = true; 81 return; 82 } 83 luc->cb (luc->cb_cls, 84 ud.unit_serial, 85 &ud); 86 GNUNET_PQ_cleanup_result (rs); 87 } 88 } 89 90 91 enum GNUNET_DB_QueryStatus 92 TALER_MERCHANTDB_lookup_custom_units_by_names ( 93 struct TALER_MERCHANTDB_PostgresContext *pg, 94 const char *instance_id, 95 const char *const *units, 96 size_t num_units, 97 TALER_MERCHANTDB_UnitsCallback cb, 98 void *cb_cls) 99 { 100 struct LookupUnitsContext luc = { 101 .cb = cb, 102 .cb_cls = cb_cls, 103 .extract_failed = false 104 }; 105 struct GNUNET_PQ_QueryParam params[] = { 106 GNUNET_PQ_query_param_array_ptrs_string (num_units, 107 (const char **) units, 108 pg->conn), 109 GNUNET_PQ_query_param_end 110 }; 111 enum GNUNET_DB_QueryStatus qs; 112 113 GNUNET_assert (NULL != pg->current_merchant_id); 114 GNUNET_assert (0 == strcmp (instance_id, 115 pg->current_merchant_id)); 116 check_connection (pg); 117 TMH_PQ_prepare_anon (pg, 118 "SELECT cu.unit_serial" 119 " ,cu.unit" 120 " ,cu.unit_name_long" 121 " ,cu.unit_name_short" 122 " ,cu.unit_name_long_i18n" 123 " ,cu.unit_name_short_i18n" 124 " ,cu.unit_allow_fraction" 125 " ,cu.unit_precision_level" 126 " ,cu.unit_active" 127 " ,FALSE AS unit_builtin" 128 " FROM merchant_custom_units cu" 129 " WHERE cu.unit = ANY ($1)" 130 " ORDER BY cu.unit"); 131 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 132 "", 133 params, 134 &lookup_units_cb, 135 &luc); 136 GNUNET_PQ_cleanup_query_params_closures (params); 137 if (luc.extract_failed) 138 return GNUNET_DB_STATUS_HARD_ERROR; 139 return qs; 140 }