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/*
This file is part of TALER
Copyright (C) 2022,2023 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 backenddb/pg_lookup_orders.c
* @brief Implementation of the lookup_orders function for Postgres
* @author Iván Ávalos
* @author Christian Grothoff
*/
#include "platform.h"
#include <taler/taler_error_codes.h>
#include <taler/taler_dbevents.h>
#include <taler/taler_pq_lib.h>
#include "pg_lookup_orders.h"
#include "pg_helper.h"
/**
* Context used for TMH_PG_lookup_orders().
*/
struct LookupOrdersContext
{
/**
* Function to call with the results.
*/
TALER_MERCHANTDB_OrdersCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Did database result extraction fail?
*/
bool extract_failed;
};
/**
* Function to be called with the results of a SELECT statement
* that has returned @a num_results results about orders.
*
* @param[in,out] cls of type `struct LookupOrdersContext *`
* @param result the postgres result
* @param num_results the number of results in @a result
*/
static void
lookup_orders_cb (void *cls,
PGresult *result,
unsigned int num_results)
{
struct LookupOrdersContext *plc = cls;
for (unsigned int i = 0; i < num_results; i++)
{
char *order_id;
uint64_t order_serial;
struct GNUNET_TIME_Timestamp ts;
struct GNUNET_PQ_ResultSpec rs[] = {
GNUNET_PQ_result_spec_string ("order_id",
&order_id),
GNUNET_PQ_result_spec_uint64 ("order_serial",
&order_serial),
GNUNET_PQ_result_spec_timestamp ("creation_time",
&ts),
GNUNET_PQ_result_spec_end
};
if (GNUNET_OK !=
GNUNET_PQ_extract_result (result,
rs,
i))
{
GNUNET_break (0);
plc->extract_failed = true;
return;
}
plc->cb (plc->cb_cls,
order_id,
order_serial,
ts);
GNUNET_PQ_cleanup_result (rs);
}
}
enum GNUNET_DB_QueryStatus
TMH_PG_lookup_orders (void *cls,
const char *instance_id,
const struct TALER_MERCHANTDB_OrderFilter *of,
TALER_MERCHANTDB_OrdersCallback cb,
void *cb_cls)
{
struct PostgresClosure *pg = cls;
struct LookupOrdersContext plc = {
.cb = cb,
.cb_cls = cb_cls
};
uint64_t limit = (of->delta > 0) ? of->delta : -of->delta;
struct GNUNET_PQ_QueryParam params[] = {
GNUNET_PQ_query_param_string (instance_id),
GNUNET_PQ_query_param_uint64 (&limit),
GNUNET_PQ_query_param_uint64 (&of->start_row),
GNUNET_PQ_query_param_timestamp (&of->date),
GNUNET_PQ_query_param_bool ((TALER_EXCHANGE_YNA_ALL == of->paid)),
GNUNET_PQ_query_param_bool ((TALER_EXCHANGE_YNA_YES == of->paid)),
GNUNET_PQ_query_param_bool ((TALER_EXCHANGE_YNA_ALL == of->refunded)),
GNUNET_PQ_query_param_bool ((TALER_EXCHANGE_YNA_YES == of->refunded)),
GNUNET_PQ_query_param_bool ((TALER_EXCHANGE_YNA_ALL == of->wired)),
GNUNET_PQ_query_param_bool ((TALER_EXCHANGE_YNA_YES == of->wired)),
GNUNET_PQ_query_param_bool (NULL == of->session_id),
NULL == of->session_id
? GNUNET_PQ_query_param_null ()
: GNUNET_PQ_query_param_string (of->session_id),
GNUNET_PQ_query_param_bool (NULL == of->fulfillment_url),
NULL == of->fulfillment_url
? GNUNET_PQ_query_param_null ()
: GNUNET_PQ_query_param_string (of->fulfillment_url),
GNUNET_PQ_query_param_end
};
enum GNUNET_DB_QueryStatus qs;
char stmt[128];
GNUNET_snprintf (stmt,
sizeof (stmt),
"lookup_orders_%s",
(of->delta > 0) ? "inc" : "dec");
PREPARE (pg,
"lookup_orders_dec",
"(SELECT"
" order_id"
",order_serial"
",creation_time"
" FROM merchant_orders"
" WHERE merchant_orders.merchant_serial="
" (SELECT merchant_serial "
" FROM merchant_instances"
" WHERE merchant_id=$1)"
" AND"
" order_serial < $3"
" AND"
" creation_time < $4"
" AND ($5 OR "
" NOT CAST($6 as BOOL))" /* unclaimed orders are never paid */
" AND ($7 OR "
" NOT CAST($8 as BOOL))"/* unclaimed orders are never refunded */
" AND ($9 OR "
" NOT CAST($10 as BOOL))" /* unclaimed orders are never wired */
" AND"
" order_serial NOT IN"
" (SELECT order_serial"
" FROM merchant_contract_terms)" /* only select unclaimed orders */
" AND ($11 OR "
" ($12 = session_id))"
" AND ($13 OR "
" ($14 = fulfillment_url))"
" ORDER BY order_serial DESC"
" LIMIT $2)"
"UNION " /* union ensures elements are distinct! */
"(SELECT"
" order_id"
",order_serial"
",creation_time"
" FROM merchant_contract_terms"
" WHERE merchant_contract_terms.merchant_serial="
" (SELECT merchant_serial "
" FROM merchant_instances"
" WHERE merchant_id=$1)"
" AND"
" order_serial < $3"
" AND"
" creation_time < $4"
" AND ($5 OR "
" (BOOL($6) = paid))"
" AND ($7 OR "
" (BOOL($8) = (order_serial IN"
" (SELECT order_serial "
" FROM merchant_refunds))))"
" AND ($9 OR"
" (BOOL($10) = wired))"
" AND ($11 OR "
" ($12 = session_id))"
" AND ($13 OR "
" ($14 = fulfillment_url))"
" ORDER BY order_serial DESC"
" LIMIT $2)"
" ORDER BY order_serial DESC"
" LIMIT $2");
PREPARE (pg,
"lookup_orders_inc",
"(SELECT"
" order_id"
",order_serial"
",creation_time"
" FROM merchant_orders"
" WHERE merchant_orders.merchant_serial="
" (SELECT merchant_serial "
" FROM merchant_instances"
" WHERE merchant_id=$1)"
" AND"
" order_serial > $3"
" AND"
" creation_time > $4"
" AND ($5 OR "
" NOT CAST($6 as BOOL))" /* unclaimed orders are never paid */
" AND ($7 OR "
" NOT CAST($8 as BOOL))"/* unclaimed orders are never refunded */
" AND ($9 OR "
" NOT CAST($10 as BOOL))" /* unclaimed orders are never wired */
" AND"
" (order_serial NOT IN"
" (SELECT order_serial"
" FROM merchant_contract_terms))" /* only select unclaimed orders */
" AND ($11 OR "
" ($12 = session_id))"
" AND ($13 OR "
" ($14 = fulfillment_url))"
" ORDER BY order_serial ASC"
" LIMIT $2)"
"UNION " /* union ensures elements are distinct! */
"(SELECT"
" order_id"
",order_serial"
",creation_time"
" FROM merchant_contract_terms"
" WHERE merchant_contract_terms.merchant_serial="
" (SELECT merchant_serial "
" FROM merchant_instances"
" WHERE merchant_id=$1)"
" AND"
" order_serial > $3"
" AND"
" creation_time > $4"
" AND ($5 OR "
" (BOOL($6) = paid))"
" AND ($7 OR "
" (BOOL($8) = (order_serial IN"
" (SELECT order_serial "
" FROM merchant_refunds))))"
" AND ($9 OR"
" (BOOL($10) = wired))"
" AND ($11 OR "
" ($12 = session_id))"
" AND ($13 OR "
" ($14 = fulfillment_url))"
" ORDER BY order_serial ASC"
" LIMIT $2)"
" ORDER BY order_serial ASC"
" LIMIT $2");
qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
stmt,
params,
&lookup_orders_cb,
&plc);
if (plc.extract_failed)
return GNUNET_DB_STATUS_HARD_ERROR;
return qs;
}
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