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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_select_aml_history.c
* @brief Implementation of the select_aml_history 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_select_aml_history.h"
#include "pg_helper.h"
/**
* Closure for #handle_aml_result.
*/
struct AmlHistoryResultContext
{
/**
* Function to call on each result.
*/
TALER_EXCHANGEDB_AmlHistoryCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
/**
* Set to #GNUNET_SYSERR on serious errors.
*/
enum GNUNET_GenericReturnValue status;
};
/**
* Function to be called with the results of a SELECT statement
* that has returned @a num_results results. Helper function
* for #TEH_PG_select_aml_history().
*
* @param cls closure of type `struct AmlHistoryResultContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
handle_aml_result (void *cls,
PGresult *result,
unsigned int num_results)
{
struct AmlHistoryResultContext *ctx = cls;
struct PostgresClosure *pg = ctx->pg;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_Amount new_threshold;
uint32_t ns;
struct GNUNET_TIME_Timestamp decision_time;
char *justification;
struct TALER_AmlOfficerPublicKeyP decider_pub;
struct TALER_AmlOfficerSignatureP decider_sig;
struct GNUNET_PQ_ResultSpec rs[] = {
TALER_PQ_RESULT_SPEC_AMOUNT ("new_threshold",
&new_threshold),
GNUNET_PQ_result_spec_uint32 ("new_status",
&ns),
GNUNET_PQ_result_spec_timestamp ("decision_time",
&decision_time),
GNUNET_PQ_result_spec_string ("justification",
&justification),
GNUNET_PQ_result_spec_auto_from_type ("decider_pub",
&decider_pub),
GNUNET_PQ_result_spec_auto_from_type ("decider_sig",
&decider_sig),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
ctx->status = GNUNET_SYSERR;
return;
}
ctx->cb (ctx->cb_cls,
&new_threshold,
(enum TALER_AmlDecisionState) ns,
decision_time,
justification,
&decider_pub,
&decider_sig);
GNUNET_PQ_cleanup_result (rs);
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_select_aml_history (
void *cls,
const struct TALER_PaytoHashP *h_payto,
TALER_EXCHANGEDB_AmlHistoryCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (h_payto),
GNUNET_PQ_query_param_end
};
struct AmlHistoryResultContext ctx = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg,
.status = GNUNET_OK
};
enum GNUNET_DB_QueryStatus qs;
PREPARE (pg,
"lookup_aml_history",
"SELECT"
" new_threshold_val"
",new_threshold_frac"
",new_status"
",decision_time"
",justification"
",decider_pub"
",decider_sig"
" FROM aml_history"
" WHERE h_payto=$1;");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
"lookup_aml_history",
params,
&handle_aml_result,
&ctx);
if (GNUNET_OK != ctx.status)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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