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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_process.c
* @brief Implementation of the select_aml_process 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_process.h"
#include "pg_helper.h"
/**
* Closure for #handle_aml_result.
*/
struct AmlProcessResultContext
{
/**
* Function to call on each result.
*/
TALER_EXCHANGEDB_AmlStatusCallback 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_process().
*
* @param cls closure of type `struct AmlProcessResultContext *`
* @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 AmlProcessResultContext *ctx = cls;
struct PostgresClosure *pg = ctx->pg;
for (unsigned int i = 0; i<num_results; i++)
{
struct TALER_PaytoHashP h_payto;
struct TALER_Amount threshold;
uint64_t rowid;
uint32_t sv;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_uint64 ("aml_status_serial_id",
&rowid),
GNUNET_PQ_result_spec_auto_from_type ("h_payto",
&h_payto),
TALER_PQ_RESULT_SPEC_AMOUNT ("threshold",
&threshold),
GNUNET_PQ_result_spec_uint32 ("status",
&sv),
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,
rowid,
&h_payto,
&threshold,
(enum TALER_AmlDecisionState) sv);
GNUNET_PQ_cleanup_result (rs);
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_select_aml_process (
void *cls,
enum TALER_AmlDecisionState decision,
uint64_t row_off,
uint64_t limit,
bool forward,
TALER_EXCHANGEDB_AmlStatusCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_uint32 (&decision),
GNUNET_PQ_query_param_uint64 (&row_off),
GNUNET_PQ_query_param_uint64 (&limit),
GNUNET_PQ_query_param_end
};
struct AmlProcessResultContext ctx = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg,
.status = GNUNET_OK
};
enum GNUNET_DB_QueryStatus qs;
const char *stmt = forward
? "select_aml_process_inc"
: "select_aml_process_dec";
PREPARE (pg,
"select_aml_process_inc",
"SELECT"
" aml_status_serial_id"
",h_payto"
",threshold"
",status"
" FROM aml_status"
" WHERE aml_status_serial_id > $2"
" AND status = $1"
" ORDER BY aml_status_serial_id ASC"
" LIMIT $3");
PREPARE (pg,
"select_aml_process_dec",
"SELECT"
" aml_status_serial_id"
",h_payto"
",threshold"
",status"
" FROM aml_status"
" WHERE aml_status_serial_id < $2"
" AND status = $1"
" ORDER BY aml_status_serial_id DESC"
" LIMIT $3");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
stmt,
params,
&handle_aml_result,
&ctx);
if (GNUNET_OK != ctx.status)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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