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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_similar_kyc_attributes.c
* @brief Implementation of the select_similar_kyc_attributes 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_similar_kyc_attributes.h"
#include "pg_helper.h"
/**
* Closure for #get_similar_attributes_cb().
*/
struct GetAttributesContext
{
/**
* Function to call per result.
*/
TALER_EXCHANGEDB_AttributeCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
/**
* Plugin context.
*/
struct PostgresClosure *pg;
/**
* Flag set to #GNUNET_OK as long as everything is fine.
*/
enum GNUNET_GenericReturnValue status;
};
/**
* Invoke the callback for each result.
*
* @param cls a `struct GetAttributesContext *`
* @param result SQL result
* @param num_results number of rows in @a result
*/
static void
get_attributes_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct GetAttributesContext *ctx = cls;
for (unsigned int i = 0; i < num_results; i++)
{
struct TALER_PaytoHashP h_payto;
struct GNUNET_TIME_Timestamp collection_time;
struct GNUNET_TIME_Timestamp expiration_time;
size_t enc_attributes_size;
void *enc_attributes;
char *provider;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_auto_from_type ("h_payto",
&h_payto),
GNUNET_PQ_result_spec_string ("provider",
&provider),
GNUNET_PQ_result_spec_timestamp ("collection_time",
&collection_time),
GNUNET_PQ_result_spec_timestamp ("expiration_time",
&expiration_time),
GNUNET_PQ_result_spec_variable_size ("encrypted_attributes",
&enc_attributes,
&enc_attributes_size),
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,
&h_payto,
provider,
collection_time,
expiration_time,
enc_attributes_size,
enc_attributes);
GNUNET_PQ_cleanup_result (rs);
}
}
enum GNUNET_DB_QueryStatus
TEH_PG_select_similar_kyc_attributes (
void *cls,
const struct GNUNET_ShortHashCode *kyc_prox,
TALER_EXCHANGEDB_AttributeCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_auto_from_type (kyc_prox),
GNUNET_PQ_query_param_end
};
struct GetAttributesContext ctx = {
.cb = cb,
.cb_cls = cb_cls,
.pg = pg,
.status = GNUNET_OK
};
enum GNUNET_DB_QueryStatus qs;
PREPARE (pg,
"select_similar_kyc_attributes",
"SELECT "
" h_payto"
",provider"
",collection_time"
",expiration_time"
",encrypted_attributes"
" FROM kyc_attributes"
" WHERE kyc_prox=$1");
qs = GNUNET_PQ_eval_prepared_multi_select (
pg->conn,
"select_similar_kyc_attributes",
params,
&get_attributes_cb,
&ctx);
if (GNUNET_OK != ctx.status)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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