lookup_statistics_amount_by_interval.h (2364B)
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/include/merchant-database/lookup_statistics_amount_by_interval.h 18 * @brief implementation of the lookup_statistics_amount_by_interval function for Postgres 19 * @author Martin Schanzenbach 20 */ 21 #ifndef MERCHANT_DATABASE_LOOKUP_STATISTICS_AMOUNT_BY_INTERVAL_H 22 #define MERCHANT_DATABASE_LOOKUP_STATISTICS_AMOUNT_BY_INTERVAL_H 23 24 #include <taler/taler_util.h> 25 #include <taler/taler_json_lib.h> 26 #include "merchantdb_lib.h" 27 28 29 /** 30 * Returns amount-valued statistics over a particular time interval. 31 * Called by `lookup_statistics_amount_by_interval`. 32 * 33 * @param cls closure 34 * @param description description of the statistic 35 * @param interval_start start time of the bucket 36 * @param cumulative_amounts_len the length of @a cumulative_amounts 37 * @param cumulative_amounts the cumulative amounts array 38 */ 39 typedef void 40 (*TALER_MERCHANTDB_AmountByIntervalStatisticsCallback)( 41 void *cls, 42 const char *description, 43 struct GNUNET_TIME_Timestamp interval_start, 44 unsigned int cumulative_amounts_len, 45 const struct TALER_Amount cumulative_amounts[static cumulative_amounts_len]); 46 47 /** 48 * Lookup statistics where the values are amounts. 49 * 50 * @param pg database context 51 * @param instance_id instance to lookup statistics for 52 * @param slug slug to lookup statistics for 53 * @param cb function to call on all statistics found 54 * @param cb_cls closure for @a cb 55 * @return database result code 56 */ 57 enum GNUNET_DB_QueryStatus 58 TALER_MERCHANTDB_lookup_statistics_amount_by_interval ( 59 struct TALER_MERCHANTDB_PostgresContext *pg, 60 const char *instance_id, 61 const char *slug, 62 TALER_MERCHANTDB_AmountByIntervalStatisticsCallback cb, 63 void *cb_cls); 64 65 #endif