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/*
This file is part of TALER
(C) 2020 Taler Systems SA
TALER is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero 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 taler-merchant-httpd_private-patch-orders-ID-forget.c
* @brief implementing PATCH /orders/$ORDER_ID/forget request handling
* @author Jonathan Buchanan
*/
#include "platform.h"
#include "taler-merchant-httpd_private-patch-instances-ID.h"
#include <taler/taler_json_lib.h>
/**
* How often do we retry the UPDATE database transaction?
*/
#define MAX_RETRIES 3
/**
* Forget part of the contract terms.
*
* @param cls pointer to the result of the forget operation.
* @param object_id name of the object to forget.
* @param parent parent of the object at @e object_id.
*/
static void
forget (void *cls,
const char *object_id,
json_t *parent)
{
int *res = cls;
if (GNUNET_OK !=
TALER_JSON_contract_part_forget (parent,
object_id))
*res = GNUNET_SYSERR;
}
/**
* Forget fields of an order's contract terms.
*
* @param rh context of the handler
* @param connection the MHD connection to handle
* @param[in,out] hc context with further information about the request
* @return MHD result code
*/
MHD_RESULT
TMH_private_patch_orders_ID_forget (const struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
struct TMH_HandlerContext *hc)
{
const char *order_id = hc->infix;
enum GNUNET_DB_QueryStatus qs;
uint64_t order_serial;
for (unsigned int i = 0; i<MAX_RETRIES; i++)
{
json_t *fields;
json_t *contract_terms;
if (GNUNET_OK !=
TMH_db->start (TMH_db->cls,
"forget order"))
{
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_START_FAILED,
NULL);
}
qs = TMH_db->lookup_contract_terms (TMH_db->cls,
hc->instance->settings.id,
order_id,
&contract_terms,
&order_serial);
switch (qs)
{
case GNUNET_DB_STATUS_HARD_ERROR:
TMH_db->rollback (TMH_db->cls);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_FETCH_FAILED,
"contract terms");
case GNUNET_DB_STATUS_SOFT_ERROR:
TMH_db->rollback (TMH_db->cls);
continue;
case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS:
TMH_db->rollback (TMH_db->cls);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_NOT_FOUND,
TALER_EC_MERCHANT_GENERIC_ORDER_UNKNOWN,
order_id);
case GNUNET_DB_STATUS_SUCCESS_ONE_RESULT:
GNUNET_assert (NULL != contract_terms);
break;
}
{
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_json ("fields",
&fields),
GNUNET_JSON_spec_end ()
};
enum GNUNET_GenericReturnValue res;
res = TALER_MHD_parse_json_data (connection,
hc->request_body,
spec);
if (GNUNET_OK != res)
{
TMH_db->rollback (TMH_db->cls);
json_decref (contract_terms);
return (GNUNET_NO == res)
? MHD_YES
: MHD_NO;
}
}
if (! (json_is_array (fields)))
{
TMH_db->rollback (TMH_db->cls);
json_decref (contract_terms);
json_decref (fields);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_PARAMETER_MALFORMED,
"fields");
}
{
size_t index;
json_t *value;
json_array_foreach (fields, index, value) {
int forget_status = GNUNET_OK;
int expand_status;
if (! (json_is_string (value)))
{
TMH_db->rollback (TMH_db->cls);
json_decref (contract_terms);
json_decref (fields);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_MERCHANT_PRIVATE_PATCH_ORDERS_ID_FORGET_PATH_SYNTAX_INCORRECT,
"field is not a string");
}
expand_status = TALER_JSON_expand_path (contract_terms,
json_string_value (value),
&forget,
&forget_status);
if (GNUNET_SYSERR == forget_status)
{
/* We tried to forget a field that isn't forgettable */
TMH_db->rollback (TMH_db->cls);
json_decref (contract_terms);
json_decref (fields);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_CONFLICT,
TALER_EC_MERCHANT_PRIVATE_PATCH_ORDERS_ID_FORGET_PATH_NOT_FORGETTABLE,
json_string_value (value));
}
if (GNUNET_SYSERR == expand_status)
{
/* One of the paths was malformed and couldn't be expanded */
TMH_db->rollback (TMH_db->cls);
json_decref (contract_terms);
json_decref (fields);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_MERCHANT_PRIVATE_PATCH_ORDERS_ID_FORGET_PATH_SYNTAX_INCORRECT,
json_string_value (value));
}
}
}
qs = TMH_db->update_contract_terms (TMH_db->cls,
hc->instance->settings.id,
order_id,
contract_terms);
json_decref (contract_terms);
json_decref (fields);
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
TMH_db->rollback (TMH_db->cls);
if (GNUNET_DB_STATUS_SOFT_ERROR != qs)
break;
}
else
{
qs = TMH_db->commit (TMH_db->cls);
if (GNUNET_DB_STATUS_SOFT_ERROR != qs)
break;
}
}
if (0 > qs)
{
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_COMMIT_FAILED,
NULL);
}
return TALER_MHD_reply_static (connection,
MHD_HTTP_OK,
NULL,
NULL,
0);
}
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