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/*
This file is part of TALER
Copyright (C) 2022 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 exchangedb/pg_get_global_fees.c
* @brief Implementation of the get_global_fees function for Postgres
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler_error_codes.h"
#include "taler_dbevents.h"
#include "taler_pq_lib.h"
#include "pg_get_global_fees.h"
#include "pg_helper.h"
/**
* Closure for #global_fees_cb().
*/
struct GlobalFeeContext
{
/**
* Function to call for each global fee block.
*/
TALER_EXCHANGEDB_GlobalFeeCallback cb;
/**
* Closure to give to @e rec.
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
/**
* Set to #GNUNET_SYSERR on error.
*/
enum GNUNET_GenericReturnValue status;
};
/**
* Function to be called with the results of a SELECT statement
* that has returned @a num_results results.
*
* @param cls closure
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
global_fees_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct GlobalFeeContext *gctx = cls;
struct PostgresClosure *pg = gctx->pg;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_GlobalFeeSet fees;
struct GNUNET_TIME_Relative purse_timeout;
struct GNUNET_TIME_Relative history_expiration;
uint32_t purse_account_limit;
struct GNUNET_TIME_Timestamp start_date;
struct GNUNET_TIME_Timestamp end_date;
struct TALER_MasterSignatureP master_sig;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_timestamp ("start_date",
&start_date),
GNUNET_PQ_result_spec_timestamp ("end_date",
&end_date),
TALER_PQ_RESULT_SPEC_AMOUNT ("history_fee",
&fees.history),
TALER_PQ_RESULT_SPEC_AMOUNT ("account_fee",
&fees.account),
TALER_PQ_RESULT_SPEC_AMOUNT ("purse_fee",
&fees.purse),
GNUNET_PQ_result_spec_relative_time ("purse_timeout",
&purse_timeout),
GNUNET_PQ_result_spec_relative_time ("history_expiration",
&history_expiration),
GNUNET_PQ_result_spec_uint32 ("purse_account_limit",
&purse_account_limit),
GNUNET_PQ_result_spec_auto_from_type ("master_sig",
&master_sig),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
gctx->status = GNUNET_SYSERR;
break;
}
gctx->cb (gctx->cb_cls,
&fees,
purse_timeout,
history_expiration,
purse_account_limit,
start_date,
end_date,
&master_sig);
GNUNET_PQ_cleanup_result (rs);
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_get_global_fees (void *cls,
TALER_EXCHANGEDB_GlobalFeeCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_TIME_Timestamp date
= GNUNET_TIME_absolute_to_timestamp (
GNUNET_TIME_absolute_subtract (
GNUNET_TIME_absolute_get (),
GNUNET_TIME_UNIT_YEARS));
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_timestamp (&date),
GNUNET_PQ_query_param_end
};
struct GlobalFeeContext gctx = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg,
.status = GNUNET_OK
};
/* Used in #postgres_get_global_fees() */
PREPARE (pg,
"get_global_fees",
"SELECT "
" start_date"
",end_date"
",history_fee_val"
",history_fee_frac"
",account_fee_val"
",account_fee_frac"
",purse_fee_val"
",purse_fee_frac"
",purse_timeout"
",history_expiration"
",purse_account_limit"
",master_sig"
" FROM global_fee"
" WHERE start_date >= $1");
return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"get_global_fees",
params,
&global_fees_cb,
&gctx);
}
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