/*
   This file is part of TALER
   Copyright (C) 2024 Taler Systems SA

   TALER is free software; you can redistribute it and/or modify it under the
   terms of the GNU General Public License as published by the Free Software
   Foundation; either version 3, or (at your option) any later version.

   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along with
   TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */
/**
 * @file src/include/exchange-database/iterate_aml_statistics.h
 * @brief implementation of the iterate_aml_statistics function for Postgres
 * @author Christian Grothoff
 */
#ifndef EXCHANGE_DATABASE_ITERATE_AML_STATISTICS_H
#define EXCHANGE_DATABASE_ITERATE_AML_STATISTICS_H

#include "taler/taler_util.h"
#include "taler/taler_json_lib.h"
#include "exchangedb_lib.h"


/**
 * Function called with AML statistics (counters).
 *
 * @param cls closure
 * @param name name of the counter
 * @param cnt number of events for @a name in the query range
 */
#ifndef TALER_EXCHANGEDB_AML_STATISTICS_RESULT_CLOSURE
/**
 * Type of the closure for #TALER_EXCHANGEDB_AmlStatisticsCallback.
 */
#define TALER_EXCHANGEDB_AML_STATISTICS_RESULT_CLOSURE void
#endif
typedef void
(*TALER_EXCHANGEDB_AmlStatisticsCallback)(
  TALER_EXCHANGEDB_AML_STATISTICS_RESULT_CLOSURE *cls,
  const char *name,
  uint64_t cnt);


/* Callback typedefs */
/**
 * Function called with AML statistics (counters).
 *
 * @param cls closure
 * @param name name of the counter
 * @param cnt number of events for @a name in the query range
 */
typedef void
(*TALER_EXCHANGEDB_AmlStatisticsCallback)(
  TALER_EXCHANGEDB_AML_STATISTICS_RESULT_CLOSURE *cls,
  const char *name,
  uint64_t cnt);

/**
 * Obtain the AML statistics for a given set of @a names and
 * timeframe.
 *
 * @param pg the database context
 * @param num_names length of the @e names array
 * @param names array of names of the statistics to fetch
 * @param start_date start of time range
 * @param end_date end of time range
 * @param cb function to call on each statistic
 * @param cb_cls closure for @a cb
 * @return database transaction status
 */
enum GNUNET_DB_QueryStatus
TALER_EXCHANGEDB_iterate_aml_statistics (struct
                                         TALER_EXCHANGEDB_PostgresContext *pg,
                                         size_t num_names,
                                         const char *names[static num_names],
                                         struct GNUNET_TIME_Timestamp start_date
                                         ,
                                         struct GNUNET_TIME_Timestamp end_date,
                                         TALER_EXCHANGEDB_AmlStatisticsCallback
                                         cb,
                                         TALER_EXCHANGEDB_AML_STATISTICS_RESULT_CLOSURE
                                         *cb_cls);

#endif
